Download VC WL series EU type

VC WL series EU type
Operating manual
Instrucciones de servicio
Manuale di servizio
Manuel de service
Table of contents
1
1.1
1.2
1.3
1.4
1.5
2
2.1
2.2
2.3
2.4
2.5
3
3.1
3.2
3.2.1
3.2.2
3.3
3.3.1
3.3.2
3.3.3
3.4
3.5
3.5.1
3.5.2
3.6
3.6.1
3.6.2
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4
4.1
4.2
4.3
4.4
4.4.1
4.4.2
4.4.3
4.4.4
4.4.5
4.4.6
4.4.7
4.5
4.6
Introduction
3
Brief description
Intended use
Standards and directives
About this manual
Environmental information
3
3
3
4
4
Safety
5
Responsibilities of the operator
Responsibilities of the electrician
Responsibilities of the crane driver
Responsibilities of the industrial truck driver
Basic safety instructions
5
6
7
8
9
Technical description
13
Scope of supply
Block diagram
Voltwerk VC WL 110–280
Voltwerk VC WL 300
Interior view
Voltwerk VC WL 110
Voltwerk VC WL 280
Voltwerk VC WL 300
Surge voltage protection
Control cabinet
Sine card
AC cards
Front door
Integrated On/Off switch
LED indicators
13
13
13
14
14
15
16
18
19
19
21
22
22
22
23
Installation location
25
Operating area
Foundation
Ventilation
Electrics
DC-side
Auxiliary power supply
AC-side
Disconnecting devices
Residual current protection (RCD)
Medium voltage transformer for Voltwerk VC WL 300
Grid characteristic
Lightning protection plan
Notes on transport
25
27
28
31
32
32
32
33
34
34
35
38
38
Voltwerk VC WL series EU model
Operating manual
ENGLISH
Table of contents
1
Table of contents
5
ENGLISH
5.1
5.2
5.3
5.3.1
5.3.2
5.4
5.5
5.6
5.7
5.8
6
6.1
6.2
7
7.1
7.2
7.3
7.4
8
8.1
8.2
8.3
8.4
8.5
8.6
9
41
41
41
43
43
45
48
48
49
49
52
Commissioning
55
Filling out the commissioning report
Putting the device into operation
55
56
Maintenance
59
Maintenance interval
Safety instructions
Check the device when disconnected
Measurements
59
59
61
66
Troubleshooting
69
Fault report
LED indicators on the front door
LED indicators for sine card
LED indicators for AC cards
Delays
Manufacturer's service centre
69
70
72
72
73
74
Repairs
75
Safety information
Fuse replacement
LV HRC fuses
Surge voltage protection device
Glass cartridge fuse
75
76
76
76
77
Commissioning report
79
Specifications
85
Efficiency curves with various input voltages
88
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9.1
9.2
9.2.1
9.2.2
9.2.3
Installation
Requirements
Connecting the solar generator
Connecting the grid
Voltwerk VC WL 110–280
Voltwerk VC WL 300
Connecting the auxiliary power supply
Fitting cable strain relief
Connecting the monitoring system
Changing grid characteristics using DIP switches (optional)
Measurements
2
Operating manual
Voltwerk VC WL series EU model
1 Introduction
Introduction
1.1
ENGLISH
1
Brief description
Voltwerk VC WL series EU model central inverters convert the direct
voltage output from solar generators into grid-compliant alternating
voltage and feed it as three-phase current into the public power grid.
Voltwerk VC WL series EU model central inverters can be combined in
order to generate a high power output.
Voltwerk VC WL 110–280
Voltwerk VC WL 110–280 central inverters are equipped with transformers
which transmit the energy produced.
Voltwerk VC WL 300
The Voltwerk VC WL 300 is a transformerless central inverter. This results
in a divergent voltage of 270 V, unlike the Voltwerk VC WL 110–280 central
inverters.
Monitoring, communication
1.2
The SmartControl monitoring unit is connected to the device's internal
interface via a CAN converter. Operating data and system messages are
communicated to the internet via ethernet, telephone line or GSM
connection. The data can be viewed and analysed either on the Voltweb
online portal or on the ControlCenter. For details, see the website of the
manufacturer (www.voltwerk.com).
Intended use
Voltwerk VC WL series EU model central inverters are designed
exclusively for converting direct current into alternating current in
photovoltaic systems. Any other use shall be deemed not to be as
intended.
The inverter may only be installed and operated in accordance with the
operating conditions and requirements (see chapter 4, page 31).
Unauthorised modifications to the device which have not been tested and
approved by the manufacturer are not permitted.
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Intended use also includes compliance with the specifications of this
Operating manual.
Voltwerk VC WL series EEG model central inverters are approved for use
exclusively in the Federal Republic of Germany. The technical
documentation for this device is supplied solely in German.
1.3
Standards and directives
The enclosed EC declaration of conformity lists the EU standards and
directives satisfied by the device. Information on country-specific
standards and directives complied with is published on the manufacturer's
website (www.voltwerk.com).
Voltwerk VC WL series EU model
Operating manual
3
1 Introduction
1.4
About this manual
ENGLISH
Please provide us with feedback if you have any questions, comments or
criticisms regarding this manual. Contact details can be found on the back
of the manual.
Subject of this manual
This manual covers the transport, assembly, installation, commissioning
and repair of the Voltwerk VC WL series EU model.
User group
This operating manual is intended to be used by Electrician appointed by
the operator.
Aid to orientation
The following aids will assist you in finding your way around this manual:
Text formatting
Descriptions for LED indicators in the text appear in bold. Item numbers
appear as (1), (2), (3).
Symbols
Denotes the start of a procedure with a description of its objective.
This is followed by individually numbered steps, which may be
interspersed with background information, illustrations, or warning
instructions.
Denotes important background information for operational procedures.
1.5
Environmental information
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Voltwerk VC WL series EU model products consist of materials which can
be recycled to recover the raw materials. The device, its accessories, and
its packaging should therefore be recycled in an environmentally
responsible manner.
4
Operating manual
Voltwerk VC WL series EU model
2 Safety
Safety
2.1
ENGLISH
2
Responsibilities of the operator
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The operator must ensure that:
|
applicable industrial safety regulations, professional association
regulations and technical regulations are complied with;
|
the specified photovoltaic system safety equipment is fully functional;
|
a second person is present during all work on the electrical system. In
the event of an unforeseen electrical accident, that person must be able
to switch off the power supply and provide assistance;
|
any work involving the transport, assembly, installation, commissioning
and repair of the device is carried out only by an authorised specialist;
|
persons commissioned to perform the work can evaluate their assigned
tasks and recognise possible risks;
|
warning instructions on the device which have become illegible are
replaced as soon as possible;
|
the device is installed and operated in an enclosed area, identified with
the appropriate warning and safety symbols;
|
access to the operating area is only granted to persons authorised by
the operator;
|
the operating area is kept free of combustible or explosive materials and
aggressive, caustic or corrosive gases;
|
a device is not used if it is defective;
|
no unauthorised changes are made to the device;
|
the specifications (see Chapter Specifications, page 85) and operating
conditions (see chapter 4, page 25) are adhered to;
|
only qualified crane operators are allowed to lift the device by crane;
|
only qualified drivers are allowed to transport the device on an industrial
truck;
|
in accordance with its weight, the device is only transported or lifted
using an industrial truck or crane;
|
any routes along which the device will be transported are able to bear
the weight of the device and of the industrial truck or crane;
|
modifications and servicing on the device are only carried out by
employees from the manufacturer or by personnel authorised by the
manufacturer;
|
maintenance work, including fan replacement, is performed on a regular
basis;
|
an adequate residual current protection system (e.g. an RCD), which is
suited to the location, is in place and is used;
|
an adequate lightning protection plan, which is suited to the location, is
in place and is used;
Voltwerk VC WL series EU model
Operating manual
5
ENGLISH
2 Safety
2.2
|
the device is always switched off before a medium voltage transformer
is switched off;
|
the instruction manual and, in particular, the safety instructions are read
and understood by any persons commissioned to perform tasks;
|
the instruction manual is available during transport, assembly,
installation, commissioning and repair;
|
the instruction manual is kept in the immediate vicinity of the device;
|
the required grid configuration is ensured (see chapter 4.4, page 31);
|
the grid characteristics are set correctly, in accordance with locationspecific requirements (see chapter 5.7, page 49);
|
changes to the grid characteristics are discussed with the energy
supplier in question. Unauthorised changes to the settings may lead to
malfunctions, losses in yield or to loss of feed-in licence.
Responsibilities of the electrician
6
the general information, step-by-step instructions and, in particular, the
safety instructions regarding assembly and installation are read in their
entirety before commissioning and before closing the disconnectors,
and are followed at all times;
|
the Voltwerk VC WL 110–280 is only operated in Terre Neutre (TN)
networks or Terre Terre (TT) networks;
|
the Voltwerk VC WL 300 is only operated in Isolé Terre (IT) networks.
This involves ensuring that the IT network is an unearthed network and
is earthed if an earth fault occurs;
|
the external low-voltage distribution board is capable of switching off
the combined currents of all central inverters which have been
connected;
|
the device is never opened during operation;
|
all plexiglass covers are fitted. The plexiglass covers serve the dual
purposes of safety and ventilation. They guide the air into and distribute
it around the device;
|
the safety devices and warning instructions on the device are used/
observed;
|
before any electrical work is performed, suitable measuring equipment is
used to ensure that the device is fully deengergised, both in the DC and
AC settings, in accordance with applicable directives. N.B. On
photovoltaic systems, the power source is always active during the
hours of daylight;
|
no safety devices are removed or disabled;
|
inserted connecting cables are adequately secured by cable strain relief
(attached to a cable mounting rail). Connecting cables which are not
strain-relieved may be damaged or completely pulled out, causing
considerable material damage to persons or property;
|
measurements are only taken with suitable measuring equipment which
conform with applicable standards and directives. Before carrying out
the measurement, read the operating manual for the measuring
equipment;
Operating manual
Voltwerk VC WL series EU model
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The electrician must ensure that:
2 Safety
the device is secured by means of a built-in lock and may only be
opened using the key supplied with the device;
|
all external and internal disconnectors are opened before commencing
work on the device.
ENGLISH
2.3
|
Responsibilities of the crane driver
The crane operator must ensure that:
|
crane operation is halted if:
|
the load cannot be securely held and safely removed due to the
influence of the wind;
|
faults occur which compromise operational safety;
all emergency limit switches and brakes have been tested before
operating the crane;
|
only crane hooks which have a safety catch are used and that these have
been regularly tested;
|
crane cables have been maintained and checked for damage;
|
the crane has been securely set up;
|
the weight and centre of gravity have been determined before the load is
attached (rated capacity limiter must not be used as a balance);
|
the load is not picked up by retracting the boom after the rated capacity
limiter has been activated;
|
persons to give instructions have been posted if the crane driver does
not have a clear view of the load. predetermined hand signals or a radio
are used for communication between operator and instructor(s);
|
loads which have been attached by hand are not raised until a hand
signal is given;
|
long loads which may become caught on other objects during
transportation are controlled with guide cables;
|
loads are not allowed to tilt or swing backwards and forwards;
|
loads which are trapped are not pulled free by the crane;
|
no persons are carried together with the load or with the load lifting gear;
|
the danger area of the crane is clearly identified;
|
loads are not left hanging on an unmanned crane;
|
loads are not lifted over the heads of other workers.
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|
Voltwerk VC WL series EU model
Operating manual
7
2 Safety
2.4
Responsibilities of the industrial truck driver
The driver must ensure that:
transport is halted if:
|
the load cannot be securely held due to the influence of the wind;
|
faults occur which endanger operational safety;
|
all emergency limit switches and brakes have been tested before
transport;
|
the industrial truck has no faults;
|
fork arms used for lifting are at the same height;
|
the lifting chains are equally tensioned;
|
restraint systems are used where available;
|
the industrial truck is loaded in such a way that the driver has a clear
view of the route ahead;
|
the industrial truck is not overloaded;
|
the industrial truck is loaded in such a way that loads cannot fall off or
shift;
|
the industrial truck is only driven with the lifting boom inclined
backwards;
|
when travelling on slopes and inclines the load is carried facing the
gradient;
|
persons have been posted to give instructions if the driver does not have
a clear view of the route ahead or the load; predetermined hand signals
or a radio are used for communication between operator and
instructor(s);
|
vehicles are only loaded or unloaded by the industrial truck if they have
been secured against rolling and tilting;
|
no persons are endangered when the industrial truck is in motion;
|
loads are not deposited in traffic routes and escape paths or in front of
safety equipment and operating equipment which must remain
accessible at all times;
|
no persons are carried together with the load or with the industrial truck;
|
loads are not transported over the heads of other workers;
|
a protective beam has been fitted to the fork arms when the truck is
travelling unloaded;
|
if necessary, the base panel of the device is removed during transport.
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ENGLISH
|
8
Operating manual
Voltwerk VC WL series EU model
2 Safety
2.5
Basic safety instructions
Risk of fatal injury due to high voltages
|
Cover or shield any adjacent live components. N.B. On photovoltaic
systems, the power source is always active during the hours of daylight.
|
Before starting any work on electrical systems:
|
Disconnect the system
|
Ensure that it is secured against being switched back on
|
Verify that the system is fully deenergised
|
Earth and short-circuit the system
Risk of fatal injury due to residual voltages
Residual voltages inside the device can result in fatal surges. Capacitors
may be charged even after the device is switched off.
When Voltwerk VC WL series EU model central inverters are disconnected
via the On/Off switch, voltage is still present at the AC and DC
connections. The On/Off switch is not a DC disconnector.
|
Open all external and internal disconnectors and secure them against
being switched back on.
|
After switching off the device, always wait for a period of 8 minutes
before touching.
|
A suitable measuring instrument should be used to verify that the device
is deenergised, in accordance with applicable guidelines.
Risk of fatal injury from arcing and short circuit currents
Very high DC voltages (no zero point) may exist in photovoltaic systems,
which could cause arcing in the event of faults or if components such as
fuses or plugs are not used in the specified manner.
The short circuit current of the solar generator is only slightly higher than
the maximum operating current and is always dependant on current
irradiation levels. This means that, where short circuits occur, there is no
definite guarantee that circuit breakers will be tripped.
|
Use components in the correct manner.
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Risk of fatal injury from magnetic and electromagnetic fields
Magnetic and electromagnetic fields may result in serious damage to
health for persons wearing a pacemaker, with metallic implants or who use
a hearing aid.
|
Persons wearing a pacemaker, with metallic implants or who use a
hearing aid are forbidden to enter the operating area.
Risk of fatal injury through disregard of safety instructions
If the sequence of steps for installation and the safety instructions are not
followed, the device may be permanently damaged and electrical
accidents may occur with serious health consequences.
Voltwerk VC WL series EU model
Operating manual
9
ENGLISH
Death or serious injury could result when working on high-voltage and
high-current electrical systems and live parts.
2 Safety
|
Observe the sequence of procedure steps for installation and follow the
safety instructions.
Risk of fatal injury due to lack of assistance
ENGLISH
In the event of an accident a second person can lend assistance.
|
Only carry out work if a second person is present.
Risk of injury due to high temperatures
The components of the product may reach temperatures of up to 150 °C,
which can cause serious burns.
|
After switching off the product, wait for an appropriate period before
touching.
|
Do not touch hot components.
Material damage due to foreign objects
Foreign objects such as film, plastic bags and pieces of paper may be
sucked in by the fans, putting the product at risk. Foreign objects stored in
the operating area may obstruct the ventilation equipment, putting the
product at risk. This may lead to losses in yield and damage to the device.
|
Keep the operating area dry, clean and free of foreign objects.
|
Keep the operating area free of combustible or explosive materials and
aggressive or corrosive gases.
Material damage due to differing specifications
The product is designed exclusively for operation in line with the
specifications. Use under other conditions may cause damage to the
product and may lead to losses in electricity fed into the grid.
|
Observe the specifications.
Material damage due to loose screw connections
Before commissioning, check that all screw connections are tightened to
the correct torque and retighten where necessary.
|
Do not treat nuts and bolts, either with grease or in any other way.
Warning instructions
Warning instructions identify information relating to safety. They consist of
the following:
10
|
Warning symbol (pictogram),
|
Indicator word to denote the level of risk,
|
Details of the nature and source of the risk
|
Details of the possible consequences if warning instructions are
disregarded,
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
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02.10.2009
If the specified tightening torques are not observed, the screws may
become loose as a consequence of vibration in the terminal blocks.
Loosened screw connections change the resistance and the conductivity
at the connection. Operation of the central inverter can be adversely
affected and it may suffer damage.
2 Safety
|
Measures for averting the risk and preventing injury or material damage.
The warning instructions are classified according to the following levels of
risk:
WARNING
Denotes an extraordinarily hazardous situation. Disregard of this
instruction will lead to serious, irreversible injury or death.
ENGLISH
DANGER
Denotes an extraordinarily hazardous situation. Disregard of this
instruction may lead to serious, irreversible injury or death.
Denotes a hazardous situation. Disregard of this instruction may lead to
slight or moderate injury.
NOTICE
Denotes a risk of material damage. Disregard of this instruction may lead
to material damage.
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CAUTION
Voltwerk VC WL series EU model
Operating manual
11
DO_BA_2009_1ENG_DVo
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ENGLISH
2 Safety
12
Operating manual
Voltwerk VC WL series EU model
3 Technical description
Technical description
3.1
ENGLISH
3
Scope of supply
|
Central inverter
|
Terminating resistor 120 !"#0.25 W
|
2 bus plugs in the housing
|
Energy supplier's signal cable (pre-assembled), length = 10 m
|
Control cabinet key
|
Operating manual
|
Manufacturing test certificate
|
EC declaration of conformity
Completeness
Check the scope of supply for completeness immediately on receipt. If the
scope of supply is incomplete, contact the manufacturer (contact details
on the back of the manual).
Transportation damage
If you discover damage which has occurred during transportation, contact
the manufacturer (contact details on the back of the manual).
All electrical screw connections were marked during manufacturing. This
makes it easy to recognise if one of these connections has become lose. If
any of the device's screw connections are loose, contact the manufacturer
(contact details on the back of the manual).
Storage
Packaging material
3.2
Take the packaging material to an environmentally-friendly recycling
facility.
Block diagram
Voltwerk VC WL 110–280
Voltwerk VC WL 110–280 central inverters are equipped with an integrated
transformer to transmit the energy produced.
Voltwerk VC WL 110–280 central inverters are designed to be connected
to TN (Terre Neutre) networks and TT (Terre Terre) networks.
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3.2.1
The device should be stored at an ambient temperature between –20 and
+50 °C. The device packaging is not weatherproof. Only store the
packaged device in enclosed spaces, which are free of aggressive or
corrosive gases, vapours or dust.
Voltwerk VC WL series EU model
Operating manual
13
3 Technical description
1~ 230V
DC 493 – 965V
DC
Filter
ȝ&
>f / <f / >U /<U
ENGLISH
MPP / >U / >I
U
3~ + N 400V
AC
Filter
DC
ISO
U
U
Filter
3.1:
3.2.2
Voltwerk VC WL 110–280: Block diagram
Voltwerk VC WL 300
The Voltwerk VC WL 300 central inverter is an inverter without an
integrated transformer which means there is no galvanic isolation between
the solar generator and the electricity grid. In this case, galvanic isolation
is provided exclusively by the medium voltage transformer.
The interlinked output voltage is 270 V (156 V phase conductor to neutral
conductor).
Voltwerk VC WL 300 central inverters are designed for grid connection to a
medium voltage transformer and may only be operated in IT (Isolé Terre)
networks.
1~ 230V
DC 530 – 965V
DC
Filter
ȝ&
>f / <f / >U /<U
MPP / >U / >I
U
3~ + N 270V
AC
Filter
DC
ISO
U
U
3.3
Voltwerk VC WL 300: Block diagram
Interior view
Depending on the revision status of the inverter in question, the interior
structure may differ from that shown in the following diagrams. The
arrangement of the components is basically the same.
14
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
3.2:
02.10.2009
Filter
3 Technical description
Voltwerk VC WL 110
ENGLISH
3.3.1
(1)
(12)
(2)
(3)
(4)
(5)
(11)
(6)
(10)
(7)
(9)
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3.3:
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(8)
Voltwerk VC WL 110 interior view
LV HRC disconnector for surge voltage protection
LV HRC disconnector AC output
Auxiliary power supply connections L, N, PE
Surge voltage protection arrester, type II
AC connection bar L3
AC connection bar L2
AC N connection bar
AC connection bar L1
AC PE connection bar
DC – connection bar
DC + connection bar
DC power circuit breaker
Voltwerk VC WL series EU model
Operating manual
15
3 Technical description
Voltwerk VC WL 280
ENGLISH
3.3.2
(1)
(2)
(3)
(4)
(5)
(11)
(12)
(8)
(10)
3.4:
(1)
16
(9)
Voltwerk VC WL 280 interior view
LV HRC disconnector for surge voltage protection
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
(7)
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(6)
3 Technical description
ENGLISH
LV HRC disconnector AC output
DC power circuit breaker
Surge voltage protection arrester, type II
Auxiliary power supply connections L, N, PE
DC + connection bar
DC – connection bar
AC PE connection bar
AC connection bar L3
AC connection bar L2
AC connection bar L1
AC N connection bar
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(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
Voltwerk VC WL series EU model
Operating manual
17
3 Technical description
Voltwerk VC WL 300
ENGLISH
3.3.3
(1)
(2)
(3)
(6)
(10) (8)
(11) (9)
3.5:
18
(7)
Voltwerk VC WL 300 interior view
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
(5)
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(4)
3 Technical description
3.4
LV HRC disconnector for surge voltage protection
DC power circuit breaker
Surge voltage protection arrester, type II
Auxiliary power supply connections L, N, PE
DC + connection bar
DC – connection bar
AC PE connection bar
AC connection bar L3
AC connection bar L2
AC connection bar L1
AC N connection bar
ENGLISH
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
Surge voltage protection
Protection range
Surge voltage protection
AC side
Type II
Auxiliary power supply
Type II
DC side
Basic protection
Depending on the local lightning protection situation, the main low voltage
distribution board and the DC connection may need to be fitted with type I
or type II arresters (see chapter 4.5, page 38).
3.5
Control cabinet
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Depending on the revision status of the inverter in question, the interior
structure of the control cabinet may differ from that shown in the following
diagram. The layout is basically the same. The number of components (e.g
the coupling relay) is determined by the power class of the inverter.
Voltwerk VC WL series EU model
Operating manual
19
3 Technical description
ENGLISH
(12)
(1)
(11)
(2)
(10)
(9)
(3)
(4)
(5)
(6)
(7)
(8)
20
Coupling relay (number dependent on power class)
Isolation amplifier (only on Voltwerk VC WL series EEG model)
Frequency transducer (only on Voltwerk VC WL series EEG model)
DC card
AC card 1
AC card 2
AC card 3
Sine card
LOGO PLC (only on Voltwerk VC WL series EEG model)
Power supply unit T3
Power supply unit T4
Fuse clips for grid monitoring and auxiliary power supply
Operating manual
Voltwerk VC WL series EU model
02.10.2009
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
Control cabinet
DO_BA_2009_1ENG_DVo
3.6:
3 Technical description
Circuit board
Description and roles
Reverse wiring#
(not pictured)
|
|
DC card
|
|
Regulates the intermediate circuit voltage
Analyses DC surge voltage events
AC cards 1 to 3
|
Each of the three cards is responsible for
one phase. They work independently of
each other.
Regulate AC voltages and AC currents.
|
CPU card #
(not pictured)
|
|
Processes all values and information
Regulates and controls individual
components
Sine card
|
Checks the direction of the supply
network's rotary field
Measures the frequency and compares it
with the specified reference frequency
Checks frequency tolerances
If all the measured values are within
specifications, issues approval for
connection to the grid
|
|
|
3.5.1
Acts as an interface between hardware
and software, and as a holder for
additional circuit boards
All input and output signals are routed via
this circuit board.
Interface card #
(not pictured)
|
Acts as a connection to external systems
(e.g. monitoring unit, Service laptop)
Power supply unit T3
|
Supplies the electronic equipment,
current sensors, LED indicators (front
door) and the relay
Power supply unit T4
|
Supplies the electronic equipment,
output stage, if applicable LOGO PLC,
frequency transducer
Sine card
Top LED
Centre LED
Grid synchronous
Phase sequence (rotary Voltage
field)
Response from the AC
cards
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02.10.2009
Three LED indicators are visible on the right of the sine card circuit board.
They light up when the inverter is in feed-in mode.
Voltwerk VC WL series EU model
Operating manual
Bottom LED
21
ENGLISH
Roles of the different circuit boards
3 Technical description
3.5.2
AC cards
Numbering from
left to right
LED 1
LED 2
LED 3
LED 4
LED 5
LED 6
LED colour
Yellow
Yellow
Yellow
Green
Red
Green
Meaning if LED lit
Overcurren AC surge voltt
age, primary
side
AC surge voltage, secondary
side
Min. AC
Fault
voltage in
normal operation
3.6
3.6.1
Normal
grid operation
Front door
Integrated On/Off switch
The On/Off switch integrated into the front door disconnects the central
inverter in question from the auxiliary power supply (AC grid). In the
process, activation of the central inverter is interrupted. The central
inverter is disconnected from the AC grid.
Display
Meaning
0
Device disconnected from the auxiliary power supply
I
Device ready for operation
Risk of fatal injury due to residual voltage
|
Open all external and internal disconnectors and secure them against
being switched back on.
|
A suitable measuring instrument should be used to verify that the device
is deenergised, in accordance with applicable guidelines.
The option also exists to install an additional external On/Off switch
outside of the operating area. This switch is integrated into the external
auxiliary power supply. The external On/Off switch disconnects the central
inverter from the auxiliary power supply (AC grid). In the process,
activation of the central inverter is interrupted. The central inverter is
disconnected from the AC grid.
22
Operating manual
Voltwerk VC WL series EU model
02.10.2009
When Voltwerk VC WL series EU model central inverters are disconnected
via the On/Off switch, voltage is still present at the AC and DC
connections. N.B.: The On/Off switch is not a DC disconnector.
DO_BA_2009_1ENG_DVo
ENGLISH
Six LED indicators are visible on each of the three identical AC cards.
These are numbered from left to right. During normal operation LEDs 4 and
6 light up.
3 Technical description
3.6.2
LED indicators
ENGLISH
Each device has four LED indicators on its front door. These may light up
or flash. For information on the LED indicators' various flashing codes,
(see chapter 6, page 55 and chapter 8.2, page 70.
Indicator Meaning
Status of mains voltage
SG
Status of solar generator voltage and output
Grid
Status of grid connection
Fault
Malfunction indicator
DO_BA_2009_1ENG_DVo
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On
Voltwerk VC WL series EU model
Operating manual
23
DO_BA_2009_1ENG_DVo
02.10.2009
ENGLISH
3 Technical description
24
Operating manual
Voltwerk VC WL series EU model
4 Installation location
Installation location
ENGLISH
4
When selecting an installation location, note the following:
4.1
|
Transient emissions (acc. to DIN EN 61000-6-4:2007-09)
|
Interference resistance (acc. to DIN EN 61000-6-2:2006-03)
|
Noise emissions from the device (< 75 dB or < 85 dB)
|
Required grid quality (acc. to DIN EN 61000-3-11:2001-04 and
DIN EN 61000-3-12:2005-09)
Operating area
Voltwerk VC WL series EU model central inverters may only be installed in
enclosed operating areas.
Requirements
|
Dry
|
Flat
|
Flame retardant
|
Non-slip
|
Clean
|
Free of foreign objects
Foreign objects such as film, plastic bags and pieces of paper may be
sucked in by the fans, putting the device at risk.
|
Free of combustible and explosive materials
|
Lockable and only accessible to persons authorised by the operator
|
Raised floor for ventilation or base fitted with a grille to prevent access
|
Cooling system fitted
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Please note that heat is released both by the central inverter and by
devices such as transformers, fuse distributors and system monitoring
components (e.g. PC, server).
Distances
|
Designed to bear the weight of the device (see Chapter Specifications,
page 85) and of the transport vehicle
|
Designed to match the device footprint (see Chapter Specifications,
page 85)
When selecting the installation location, the following distances must be
complied with:
|
100 mm to the side
|
40 mm from the wall
|
300 mm above
No item should be stored above the device.
Voltwerk VC WL series EU model
Operating manual
25
4 Installation location
When ensuring this, please note the device dimensions.
40 mm
ENGLISH
1,210 mm
100 m
100 mm
m
1,700 mm
Voltwerk VC WL 110 from above with the doors open
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4.1:
26
Operating manual
Voltwerk VC WL series EU model
4 Installation location
40 mm
ENGLISH
2,010 mm
1,700 mm
100 mm
100 mm
4.2:
Ambient temperatures
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4.2
Voltwerk VC WL 280–300K from above with the doors open
Ensure that the space complies with the acceptable ambient temperatures
both during installation and operation:
Voltwerk VC WL 110
–20 °C to +45 °C
Voltwerk VC WL 280–300K
–20 °C to +40 °C
Foundation
Ensure that the foundation can bear the weight of the device model in
question, as well as the weight of the transport vehicle.
The foundation must:
|
be level,
|
be flame retardant,
|
be non-slip,
|
be of an adequately solid construction to bear the weight of the device
(see Chapter Specifications, page 85) and the transport vehicle,
Please note: under-engineered foundations may collapse thus creating
a life-threatening situation.
|
be designed to match the device footprint (see Chapter Specifications,
page 85)
Voltwerk VC WL series EU model
Operating manual
27
4 Installation location
4.3
Ventilation
Material damage due to foreign objects
ENGLISH
Foreign objects such as film, plastic bags and pieces of paper may be
sucked in by the fans, putting the product at risk. Foreign objects stored in
the operating area may obstruct the ventilation equipment, putting the
product at risk. This may lead to losses in yield and damage to the device.
|
Keep the operating area dry, clean and free of foreign objects.
|
Keep the operating area free of combustible or explosive materials and
aggressive or corrosive gases.
Material damage due to inadequate ventilation
If, owing to insufficient ventilation capacity or blocked air passageways,
individual components of the device are unable to achieve sufficient
cooling, these components may age prematurely. The components may be
irreparably damaged. The circulation of air is only possible if all plexiglass
covers are fitted and the inverter is closed.
|
Provide sufficient ventilation in the operating area.
|
Fit all plexiglass covers.
|
Do not operate the inverter except in its closed state.
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Voltwerk VC WL series EU model central inverters must be installed on a
raised floor or base. The raised floor or base will ensure that air can be
sufficiently filtered and drawn in through the inlet opening in the base of
the inverter.
28
Operating manual
Voltwerk VC WL series EU model
4 Installation location
Air flow
ENGLISH
Hot air
1,500 m3/h
4.3:
Cold air
Air flow for the Voltwerk VC WL 110
1,500 m³/h
DO_BA_2009_1ENG_DVo
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Required flow rate
Voltwerk VC WL series EU model
Operating manual
29
4 Installation location
ENGLISH
Hot air
1,750 m3/h
1,750 m3/h
Cold air
4.4:
Air flow for the Voltwerk VC WL 280–300K
Required flow rate
3,500 m³/h (2 x 1,750 m³/h)
Please note that the Voltwerk VC WL 280 and Voltwerk VC WL 300 central
inverters both consist of two separate cabinets. A flow rate of 1,750 m³/h
is required for each cabinet.
30
To filter the inlet air at the base, use a G3 or G4 class filter (EN 779).
|
The cooling air of the inverter and the ambient air must be free of
combustible and explosive gases.
|
The cooling air of the inverter and the ambient air must be free of
aggressive, caustic and corrosive gases (e.g. ammonia, sulphurous
gases).
|
The cooling air of the inverter and ambient air must be free of corrosive
gases (such as salt-laden air).
|
In order to prevent a 'short circuit' between the two different air flows,
fresh air and exhaust air must be structurally separated.
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
|
02.10.2009
Requirements for the air in the operating area
|
The size of the air inlet and air outlet must be determined in line with the
design and the required flow rate.
|
The maximum permissible humidity of the cooling and ambient air is
95%.
|
At the flow rate required for the device (cool air quantity), the total
pressure loss caused by flow resistance must be less than 70 Pa. If the
pressure is higher than this, use external fans.
When calculating the pressure loss, consider:
|
pressure losses from components such as air baffles, air filters,
blades, air ducts
|
increase in pressure loss due to dirt on components
|
that the inverter can be disregarded when calculating the pressure
loss.
Using external fans
The ventilation system can be supported by an external fan.
If the fan is thermostat-controlled:
|
install it in the exhaust air duct,
|
install it centrally over the inverter,
|
with the Voltwerk VC WL 110 set to +45 °C,
|
with the Voltwerk VC WL 280–300K set to +40 °C.
A timed relay ensures that the fan runs on for 5 to 10 minutes. This
reduces the switching frequency.
If you do not have any experience of planning and implementing
ventilation systems, contact an expert for help.
4.4
Electrics
The following must be present on site:
Cable leads for the connection in the right length and size.
|
A fuse switch with a gG-type fusible cut-out or a power circuit breaker
with an isolating function
The connection cross-sectional area for all Voltwerk VC WL series
EU model central inverters depends on the desired voltage drop, the fuse
rating and on the laying system. Comply with the local regulations.
Solar generator
(DC)
Grid (AC)
Unlimited maximum cross section,
connection via M12 cable lugs
Auxiliary power supply (230
V) AC)
1.5–2.5 mm²
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Connection cross-sectional
area
|
Voltwerk VC WL series EU model
Operating manual
31
ENGLISH
4 Installation location
4 Installation location
4.4.1
DC-side
Possible earthing of solar
modules
When using some thin-film modules as well as special solar modules with
contacts on the rear, it may be necessary to earth the solar generator.
Please contact the manufacturer of the solar module to check whether this
is required. If the manufacturer requires that the solar generator is earthed,
the DC earth must be protected with a fuse approved for DC currents. Also
ensure applicable safety regulations, standards and local regulations are
observed.
Risk of fatal injury due to earthed solar generator.
A fault in the DC cabling can cause a short circuit or arcing. If there is an
insulation fault in the solar generator, touching the solar generator can
cause death. The risk of fatal injury is increased in an earthed solar
generator. Service engineers must be advised of the earthing so that they
can operate accordingly in the event of malfunction.
|
Use a DC disconnect switch for earthing.
|
Clearly mark earthed solar generators.
When using central inverters from the Voltwerk VC WL series EU model, it
is possible to earth the solar module on both poles. If the inverter is
connected to an earthed solar generator, the SG LED indicator on the front
door will flash continuously. This warning is visible throughout the entire
operating time and cannot be deactivated for safety reasons.
Voltwerk VC WL 300
4.4.3
Auxiliary power supply
|
Cable lead, single-phase, 230 V ± 20%, 56–63 Hz
|
TN network
|
Series fuse 16 A, type B or comparable
|
If necessary, use a separate transformer with an output of 2.5 kVA to
supply the central inverter with 230 V.
AC-side
Fuse the AC connecting cable with the rated current specified on the type
plate. If the specified rated current differs from the rated current for the
fuse inserts, use a fuse insert with the next highest rated current.
Two cables can be connected per phase.
Maximum fuse values
32
For information on this, consult the local regulations.
Level of performance
Fuse rating
Fuse type
Voltwerk VC WL 110
160 A
LV HRC1
Voltwerk VC WL 280
400 A
LV HRC3
Voltwerk VC WL 300
630 A
LV HRC3
Operating manual
Voltwerk VC WL series EU model
02.10.2009
4.4.2
DO_BA_2009_1ENG_DVo
ENGLISH
There are two to eight cable leads, as up to four positive terminal strings
and four negative terminal strings can be connected.
4 Installation location
When using a circuit breaker, set it to the rated current of the device.
Voltwerk VC WL series EU model central inverters only switch on with a
clockwise rotary field. The incorrect rotary field will prevent the device
from connecting to the public grid.
ENGLISH
Rotary field
L1
L3
L2
4.5:
Clockwise rotary field
Voltwerk VC WL 300
The AC output voltage is 270 Veff (phase to phase). Please note that the
lower output voltage (270 V) creates higher currents (577 A). This calls for
larger cable sections than for devices with 400 V output voltage. The cable
section depends on the length of the cable, the fuse rating, the laying
system and, if applicable, on local regulations.
Requirements
The following requirements must be fulfilled:
|
4.4.4
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DC-side
The AC cables for connection to the Voltwerk VC WL series EEG model
must:
|
be protected against earth faults,
|
be protected against short circuit,
|
have a voltage resistance of at least 1,000 V.
|
No consumer may be connected to the AC output voltage of the device.
|
Use aluminium cable clips to act as cable strain relief.
|
A medium voltage transformer or a shared transformer with galvanically
isolated low-voltage windings must be used for each device.
Disconnecting devices
An external DC disconnecting device must be connected upstream of the
Voltwerk VC WL series EU model central inverters, so that if damage
occurs or for the purposes of inspecting the solar generator, the central
inverters can be disconnected on the DC side. The manufacturer
recommends that a surge voltage protection device should also be
provided.
Material damage due to short circuit
A fault such as a short circuit in a cable or generator junction box (GAK)
may damage the central inverter.
|
Fuse each cable between the GAK and the central inverter to protect
against overload. #
The fuse value depends on which cables have been used, the cable
length, the laying system and the GAK.
Voltwerk VC WL series EU model
Operating manual
33
4 Installation location
ENGLISH
AC-side
4.4.5
An external AC disconnecting device must be connected upstream of the
Voltwerk VC WL series EU model central inverters, so that the central
inverter may be fully deenergised during maintenance, for instance. The
external disconnecting device must be able to be secured to prevent it
being switched back on. Disconnecting devices must comply with
international regulations IEC 60364-7-712.
Residual current protection (RCD)
Risk of fatal injury due to residual voltage
If a high-impedance connection is made in an electricity grid between a
phase conductor and earth, a residual current will flow, which will not be
disconnected by an upstream fuse. Residual currents can cause fatal
injuries, fires and material damage.
|
Different grid configurations
Use RCDs (Residual Current Devices).
An RCD must be used In Terre Terre (TT) networks. In Terre Neutre
Combiné (TN-C) networks, RCDs must not be used. In other grid
configurations, checks should be made on a project-by-project basis, as
to whether an RCD is required due to the specifications of the energy
supplier, insurance company or building regulation authorities, as well as
standards and technical directives (e.g. DIN VDE 0100-410 (IEC 60364-441:2005)).
Please note that, for technical reasons, the central inverters have a
leakage current (300 mA).
4.4.6
Medium voltage transformer for Voltwerk VC WL 300
Medium voltage side
In accordance with the specifications of the energy supplier
Low voltage side
Interlinked voltage
Rated power
34
Operating manual
270 Veff (3 phases, N)
270 kVA
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
Specifications of the transformer required when using a Voltwerk
VC WL 300:
02.10.2009
The Voltwerk VC WL 300 central inverter is an inverter without an
integrated transformer which means there is no galvanic isolation between
the solar generator and the electricity grid. A medium voltage transformer
with galvanic isolation is required to connect a Voltwerk VC WL 300
inverter to the electricity grid. A medium voltage transformer must be
provided for each central inverter, or the medium voltage transformer must
have a galvanically isolated winding for each device. Combining the
Voltwerk VC WL 300 with other Voltwerk VC WL series EU model devices
is only then possible if appropriate medium voltage transformers are used.
Except for the missing transformer, the basic design and operation
correspond to the Voltwerk VC WL 280. When designing the fuses and
cables to the transformer, however, account must be taken of the higher
output and lower output voltage of the Voltwerk VC WL 300.
4 Installation location
Low voltage side
4.4.7
Dyn5 or Dyn11
<= 6 %
ENGLISH
Vector group
Short circuit voltage
Grid characteristic
TN or TT networks
Voltwerk VC WL 110–280 central inverters are designed to be connected
to TN (Terre Neutre) networks and TT (Terre Terre) networks.
In TN and TT networks, the transformer which is feeding in is earthed.
TN networks
Circuits in TN networks
L1
L2
L3
PEN
N
PE
4.6:
TN-C (Terre Neutre Combiné) network
L1
L2
L3
N
PEN
4.7:
PE
TN-C-S (Terre Neutre Combiné Separé) network
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L1
L2
L3
N
PE
4.8:
TN-S (Terre Neutre Separé) network
Voltwerk VC WL series EU model
Operating manual
35
4 Installation location
TT network
L1
L2
ENGLISH
L3
N
PE
4.9:
TT (Terre Terre) network
In contrast to a TT system, in a TN system, a zeroing of the transformer is
performed.
Example circuit
230V / 50Hz /
L1, N, PE
Control
PE
PE
L2
AC Filter
DC:
U< / U> / I< / I>
MPP
L1
L3
AC:
f> / f< / U> / U<
N
N
PEN
230V / 50Hz /
L1, N, PE
L1
L2
L3
N
Control
PE
PE
L2
AC Filter
L3
AC:
f> / f< / U> / U<
4.10: Voltwerk VC WL 110–280: Example circuit
Multiple Voltwerk VC WL 110–280 central inverters can be operated on
one medium voltage transformer with a shared winding.
IT network
Voltwerk VC WL 300
36
Voltwerk VC WL 300 central inverters are designed for grid connection to a
medium voltage transformer and may only be operated in IT (Isolé Terre)
networks. Please note:
Operating manual
Voltwerk VC WL series EU model
02.10.2009
N
DO_BA_2009_1ENG_DVo
DC:
U< / U> / I< / I>
MPP
L1
4 Installation location
|
An IT network is an unearthed network.
|
In the event of an earth fault the network is earthed.
Therefore:
|
earth the inverter housing with low resistance.
|
ENGLISH
the surge voltage protection device and inverter filter units are only
functional when the device is earthed.
do not earth the neutral point of the medium voltage transformer.
L1
L2
L3
N
PE
4.11: IT (Isolé Terre) network
Example of circuit with two inverters
230V / 50Hz /
L1, N, PE
Control
AC Filter
DC:
U< / U> / I< / I>
MPP
L1
AC:
f> / f< / U> / U<
L2
L3
N
L1
L2
L3
Control
L1
AC Filter
DC:
U< / U> / I< / I>
MPP
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230V / 50Hz /
L1, N, PE
AC:
f> / f< / U> / U<
L2
L3
N
4.12: Voltwerk VC WL 300: Example circuit
Voltwerk VC WL series EU model
Operating manual
37
4 Installation location
One medium voltage transformer must be provided per central inverter.
4.5
Lightning protection plan
ENGLISH
Material damage due to lightning strike
A lightning strike in the vicinity of or directly to the photovoltaic system
may damage the system components.
|
Create a lightning protection plan for all system components (solar
modules, inverters, monitoring system, etc.).
|
Put the lightning protection plan into action.
The risk of surge voltage events and lightning strikes will differ depending
on the location and composition of the photovoltaic system. Please note:
|
Risk assessment acc. to DIN EN 62305-2
|
Statutory and local regulations
|
Requirements of the insurer of the photovoltaic system
Each location and differing system topology (module types, rated voltage,
cable routing, etc.) places different demands on a lightning protection
plan. The manufacturer is not able to produce any universally applicable
specifications to guarantee total protection. Each photovoltaic system
must be evaluated in its own right. If you do not have any experience of
planning and implementing such systems, contact an expert for help.
The manufacturer recommends, that all cables connected to the inverter
be protected with a Type II surge voltage arrester acc. to EN 61643-11 /12. Particularly the DC input must be protected against impermissible
surge voltages, which can be transmitted through the cables of the solar
generator. Depending on system topology, risk and composition, either a
Type II arrester acc. to EN 61643-11/-12 or a Type I arrester is used.
Please note that this recommendation will not guarantee complete
protection of the device under all circumstances.
4.6
Notes on transport
Material damage due to incorrect transportation.
38
Avoid the effects produced by impact when using an industrial truck or
crane.
|
Transport the device in an upright position only.
|
Ensure the transportation method produces low levels of vibration.
|
If an industrial truck is used, only raise the central inverter from the rear.
|
Remove the base panel when using an industrial truck.
|
Transport the device in a full assembled state.
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
|
02.10.2009
Material damage may be caused if the central inverters are improperly
transported.
ENGLISH
4 Installation location
(1)
4.13: Transport using an industrial truck
(1)
Marking on the device showing centre of gravity
Risk of injury due to incorrect attachment
Material damage or personal injuries may be caused if the central inverters
are incorrectly attached when lifted. The central inverters have a high,
eccentric centre of gravity (1). If this centre of gravity is not taken into
account, the load can tip over during lifting and transport. This can result
in personal injuries or material damage.
Only attach the central inverter to the transport forks.
|
Check the centre of gravity (1) for the device, paying attention to the
marking on the packaging.
|
Use a steel cable > 1,500 m. Use steel cables of lengths which suit the
type of device.
|
For the hanger assembly, only use standardised steel cables which have
been approved for transporting the tension load specific to the device.
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|
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Operating manual
39
4 Installation location
ENGLISH
> 1,500 mm
???????????
(1)
4.14: Transportation by crane
(1)
Marking on the device showing centre of gravity
Material damage due to condensate
If the device is moved from a cold environment to an operating area,
condensate may form, causing damage to the electronic equipment.
|
Before commissioning, the device must be absolutely dry.
|
During transportation, do not subject the device to high temperature
fluctuations or particularly high levels of air humidity.
|
Observe a minimum waiting time of 2 hours between installation at the
operating site and commissioning.
Material damage due to temperature fluctuations
Transport the unit at a constant temperature and at low humidity.
Material damage due to impact
When slewing and depositing the load, electronic equipment can be
damaged by the force of impact.
|
40
Ensure the unit does not suffer impact during transportation.
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
|
02.10.2009
During transportation, electronic equipment can be damaged by
temperature fluctuations and air humidity.
5 Installation
Installation
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5.1
5.2
ENGLISH
5
Requirements
|
Before commissioning, Voltwerk VC WL series EU model central
inverters must be prepared to suit local conditions and adjusted
according to national regulations and technical connection conditions.
|
Make sure that the grid voltage stays within the specified limit (see
Chapter Specifications, page 85).
|
Before starting any work:
|
Disconnect the inverter and secure it against switching back on.
|
Ensure that the inverter is fully deenergised.
|
Ensure that the connections are fully deengergised. N.B. On
photovoltaic systems, the power source is always active during the
hours of daylight.
|
The base panels must be fitted.
|
The transport rails must be fitted.
|
Cable leads for the connections are provided on site by the operator in
the right length and size. Replace the leads if they are damaged.
|
The fuse rating and fuse type of the external series fuse must be
observed.
|
A fuse switch with a gG-type fusible cut-out or a power circuit breaker
with an isolating function must be used.
|
Auxiliary power supply: Series fuse 16 A, type B or comparable must be
used.
|
Voltwerk VC WL 300: A fuse must be connected between the device and
the medium voltage transformer, since no fuse has been integrated into
the device.
|
The grid connection cable with the specified rated current must be fused
(see chapter 4.4.3, page 32).
Connecting the solar generator
Tools required
|
Torque wrench 17 mm
|
Cable stripping knife, insulation removal tool
|
M12 cable lug#
cable lugs must be of the correct size for the cable sections used.
|
Approved tool for crimping cable lugs
Voltwerk VC WL series EU model
Operating manual
41
5 Installation
ENGLISH
Requirements
|
Disconnect the inverter and secure it against being switched back on.
|
Verify that the inverter is fully deenergised. N.B. On photovoltaic
systems, the power source is always active during the hours of daylight.
|
Switch off the auxiliary power supply.
|
2 to a maximum of 8 cable leads must be available on site, as up to four
positive terminal strings and four negative terminal strings may be
connected.
Connecting the solar generator
1.
Remove the lower plexiglass cover.
2.
Check the cable leads of the solar generator.
(1)
(2)
5.1:
(1)
(2)
Voltwerk VC WL 110
DC + connection bar
DC – connection bar
(1)
(1)
(2)
42
Voltwerk VC WL 280–300K
DC + connection bar
DC – connection bar
3.
Loosen the securing nuts on the threaded studs inserted through the
connection bars.
4.
Remove the retaining washer and flat washer from each of the threaded
studs.
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
5.2:
02.10.2009
(2)
5 Installation
Material damage due to unsuitable cable lugs
NOTICE
Cable lugs may come undone, thereby interrupting the flow of current
and causing material damage.
5.
|
the device's connection bar and
|
the diameter of the bolt.
Install the mounting elements on the threaded bolt in the following
order:#
a) Cable lug#
b) Washer#
c) Retaining washer#
d) Securing nut
Material damage due to loose screw connections
NOTICE
If the specified tightening torques are not observed, the screws may
become loose as a consequence of vibration in the terminal blocks.
Loosened screw connections change the resistance and the conductivity
at the connection. Operation of the central inverter can be adversely
affected and it may suffer damage.
Result
02.10.2009
the chosen cable diameter,
Do not use aluminium cable lugs.
|
DO_BA_2009_1ENG_DVo
|
ENGLISH
Use cable lugs of the correct size, ensuring that the cable lugs match:
|
5.3
5.3.1
|
Before commissioning, check that all screw connections are tightened
to the correct torque and retighten where necessary.
|
Do not treat nuts and bolts, either with grease or in any other way.
Thread size
Tightening torque (Nm)
M10
54
M12
93
6.
Tighten the securing nuts.
7.
Fit the plexiglass cover and screw into place.
8.
Label the cables.
The solar generator is connected.
Connecting the grid
Voltwerk VC WL 110–280
Requirements
|
Disconnect the inverter and secure it against being switched back on.
|
Verify that the inverter is fully deenergised. N.B. On photovoltaic
systems, the power source is always active during the hours of daylight.
|
Switch off the auxiliary power supply.
Voltwerk VC WL series EU model
Operating manual
43
5 Installation
|
Ensure that the AC cables are fully deengergised.
|
TN or TT network must be present.
ENGLISH
Voltwerk VC WL 110–280 central inverters are designed to be
connected to TN (Terre Neutre) networks and TT (Terre Terre) networks.
Connecting to the grid
1.
Remove the lower plexiglass cover.
2.
Check the AC cable leads.
Voltwerk VC WL series EU model central inverters only switch on with a
clockwise rotary field. The incorrect rotary field will prevent the device
from connecting to the public grid.
Check the direction of the rotary field.
|
(1)
(2)
(3)
(5)
5.3:
(4)
Grid connectionsVoltwerk VC WL 110
(1)
(2)
5.4:
(1)
(2)
(3)
(4)
(5)
6.
44
(5)
Grid connectionsVoltwerk VC WL 280
AC
AC
AC
AC
AC
connection bar L3
connection bar L2
connection bar L1
N connection bar
PE connection bar
Fit the cable connections L1, L2, L3, N, and PE.
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
(4)
02.10.2009
(3)
5 Installation
NOTICE
|
Retaining washers
|
Washers
Use cable lugs of the correct size, ensuring that the cable lugs match:
|
the chosen cable diameter,
|
the device's connection bar and
|
the diameter of the bolt.
Do not use aluminium cable lugs.
8.
02.10.2009
Securing nuts
Cable lugs may come undone, thereby interrupting the flow of current
and causing material damage.
|
DO_BA_2009_1ENG_DVo
|
Material damage due to unsuitable cable lugs
|
NOTICE
Remove the following components from the threaded bolt of the
connection bars:
ENGLISH
7.
Install the mounting elements on the threaded bolt in the following
order:#
a) Cable lug#
b) Washer#
c) Retaining washer#
d) Securing nut
Material damage due to loose screw connections
If the specified tightening torques are not observed, the screws may
become loose as a consequence of vibration in the terminal blocks.
Loosened screw connections change the resistance and the conductivity
at the connection. Operation of the central inverter can be adversely
affected and it may suffer damage.
|
Before commissioning, check that all screw connections are tightened
to the correct torque and retighten where necessary.
|
Do not treat nuts and bolts, either with grease or in any other way.
Thread size
Tightening torque (Nm)
M10
54
M12
93
9.
Tighten the securing nut.
10. Label the cables.
11. Fit the plexiglass cover and screw into place.
Result
5.3.2
Voltwerk VC WL 110–280: The grid is connected.
Voltwerk VC WL 300
Requirements
|
Disconnect the inverter and secure it against being switched back on.
Voltwerk VC WL series EU model
Operating manual
45
ENGLISH
5 Installation
|
Verify that the inverter is fully deenergised. N.B. On photovoltaic
systems, the power source is always active during the hours of daylight.
|
Switch off the auxiliary power supply.
|
Ensure that the AC cables are fully deengergised.
|
The IT network must be present.
Voltwerk VC WL 300 central inverters are designed for grid connection
to a medium voltage transformer and may only be operated in IT (Isolé
Terre) networks.
|
|
A medium voltage transformer or a shared transformer with galvanically
isolated low-voltage windings must be provided for each device. Please
note that:
|
Voltwerk VC WL 300 is a device which does not have galvanic
isolation.
|
The N conductor connection of the device must be connected
straight to the unearthed, low-voltage side neutral point of the
medium voltage transformer.
An AC fuse rated at 630 A must be present.
No AC fuse is integrated into the inverter.
Connecting to the grid
1.
Remove the lower plexiglass cover.
2.
Check the AC cable leads.
Voltwerk VC WL series EU model central inverters only switch on with a
clockwise rotary field. The incorrect rotary field will prevent the device
from connecting to the public grid.
|
Check the direction of the rotary field.
(1)
(2)
(4)
5.5:
(1)
(2)
(3)
(4)
46
(5)
Grid connectionsVoltwerk VC WL 300
AC
AC
AC
AC
connection bar L3
connection bar L2
connection bar L1
N connection bar
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
02.10.2009
(3)
5 Installation
(5)
NOTICE
7.
The following components are removed from the threaded bolt of the
connection bars:
Retaining washers
|
Washers
Cable lugs may come undone, thereby interrupting the flow of current
and causing material damage.
Use cable lugs of the correct size, ensuring that the cable lugs match:
|
the chosen cable diameter,
|
the device's connection bar and
|
the diameter of the bolt.
Do not use aluminium cable lugs.
8.
02.10.2009
Securing nuts
|
Material damage due to unsuitable cable lugs
|
DO_BA_2009_1ENG_DVo
|
Install the mounting elements on the threaded bolt in the following
order:#
a) Cable lug#
b) Washer#
c) Retaining washer#
d) Securing nut
Material damage due to loose screw connections
If the specified tightening torques are not observed, the screws may
become loose as a consequence of vibration in the terminal blocks.
Loosened screw connections change the resistance and the conductivity
at the connection. Operation of the central inverter can be adversely
affected and it may suffer damage.
|
Before commissioning, check that all screw connections are tightened
to the correct torque and retighten where necessary.
|
Do not treat nuts and bolts, either with grease or in any other way.
Thread size
Tightening torque (Nm)
M10
54
M12
93
9.
Tighten the securing nut.
10. Label the cables.
11. Fit the plexiglass cover and screw into place.
Result
Voltwerk VC WL 300: The grid is connected.
Voltwerk VC WL series EU model
Operating manual
47
ENGLISH
Fit the cable connections L1, L2, L3, N, and PE. Ensure that: the N
conductor connection is connected straight to the unearthed, low
voltage side neutral point of the medium voltage transformer.
|
NOTICE
AC PE connection bar
6.
5 Installation
5.4
Connecting the auxiliary power supply
ENGLISH
Requirements
Voltwerk VC WL 300
|
Disconnect the inverter and secure it against being switched back on.
|
Verify that the inverter is fully deenergised. N.B. On photovoltaic
systems, the power source is always active during the hours of daylight.
|
Switch off the auxiliary power supply.
|
Cable lead, single-phase, 230 V ± 20%, 56–63 Hz
|
TN network
|
Series fuse 16 A, type B or comparable
|
If necessary, use a separate transformer with an output of 2.5 kVA to
supply the central inverter with 230 V.
N
PE
1
X2
1
Connecting the auxiliary power supply
1.
Result
5.5
Connect the wires L, N and PE to the connection terminal, ensuring
that the cables are correctly allocated to the terminals.
Auxiliary power supply is connected.
Fitting cable strain relief
Risk of injury due to damaged cable leads
Cable leads for the connections are provided on site by the operator in
the right length and size.
|
Fit the cable strain relief on site.
|
Adequately secure connecting cables entering the device by a cable
strain relief (cable mounting rail).
|
Only use aluminium cable clips for cable strain relief on the cables.
Check all cable leads before connecting the cabling.
Fitting cable strain relief
1.
48
Fasten the cable lead to a cable mounting rail.
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
|
02.10.2009
Connecting cables which are not strain-relieved may be damaged or
severed. This can result in serious personal injury or material damage.
5 Installation
Cable strain relief must be provided on site and must only be carried out
using components which are approved for the purpose.
5.6
Cable strain relief has been fitted.
ENGLISH
Result
Connecting the monitoring system
The SmartControl monitoring system is connected to the device
communication hub via the CAN converter. The remaining second
interface must be terminated using the resistor provided.
When routing the cables, please note that routing signal cables and
power-carrying cables together can cause interruptions to the signal.
Signal cables should therefore be routed separately from these other
cables.
More detailed information can be found in the SmartControl Operating
manual.
5.7
Changing grid characteristics using DIP switches
(optional)
On delivery, the grid characteristics of the Voltwerk VC WL series
EEG model are set in accordance with the requirements laid down by the
BDEW (German Federal Association for the Energy and Water Industries) in
chapter 2.5.3 of the Technical Directive “Generation systems on medium
voltage grids”, June 2008 edition. Other inverters in the
Voltwerk VC WL series EU model are delivered with their grid
characteristics set in accordance with VDE0126-1-1. If the setting is not
suitable for the power characteristics of your grid connection, you can
modify the setting to meet location-specific requirements. Please note the
country-specific standards and directives. You can obtain the approved
values from your energy supplier.
Material damage due to incorrect grid characteristics
Using the wrong grid characteristics may significantly impair operating
performance and lead to malfunctions and permanent damage to the
device.
DO_BA_2009_1ENG_DVo
02.10.2009
If the grid characteristics are not set to the same values on the three AC
cards, this may significantly impair operating performance and lead to
malfunctions and permanent damage to the device.
|
Discuss the grid characteristics with your energy supplier.
|
Set the grid characteristics on all three AC cards to the same value.
Requirements
|
Disconnect the inverter and secure it against being switched back on.
|
Verify that the inverter is fully deenergised. N.B. On photovoltaic
systems, the power source is always active during the hours of daylight.
|
Switch off the auxiliary power supply.
Voltwerk VC WL series EU model
Operating manual
49
5 Installation
Required tools and materials
|
Insulated tool with a fine point of approx. 1 mm in diameter
|
Magnifying glass (where required)
ENGLISH
Changing grid characteristics
NOTICE
1.
Open the control cabinet.
2.
Remove the plexiglass cover.
Material damage due to damaged DIP switches
DIP switches are particularly sensitive to mechanical stress and must be
set with the aid of a special tool or an object with a stable, filigree tip.
Only use suitable tools.
|
(1)
(2)
(3)
(4)
(1) to (3) AC cards
[4] Sine card
3.
Set the DIP switches on the three AC cards (1) to (3) as per the
information in the following tables.
Mains voltage
(phase to N)
S1
S2
S3
S4
grid undervoltage
221 VAC
–a
–a
off
off
197 VAC
–a
–a
off
on
a
a
on
off
–a
on
on
a
–a
grid surge voltage
208 V AC
–
186 VAC
–a
–
235 VAC
off
off
–
253 VAC
off
on
–a
–a
a
–a
–a
245 VAC
on
off
–
264 VAC
on
on
–a
a) The status of the DIP switch is not analysed.
50
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
Comment
02.10.2009
Voltwerk VC WL 110–280
5 Installation
Comment
Mains voltage
(phase to N)
S1
S2
S3
S4
Grid undervoltage
150 VAC
–a
–a
off
off
134 VAC
–
a
a
off
on
141 VAC
–a
–a
on
off
126 VAC
–
a
a
on
on
159 VAC
off
off
–a
–a
172 VAC
off
on
–a
–a
a
–a
–a
Grid surge voltage
–
–
166 VAC
on
off
–
179 VAC
on
on
–a
ENGLISH
Voltwerk VC WL 300
a) The status of the DIP switch is not analysed.
If the values which can be set using the DIP switches do not meet the
specifications, the next lower value must be selected for the surge voltage
shutdown (e.g. specified: 248 V, selected: 245 V). If this is the case for the
undervoltage shutdown, the next higher value must be selected (e.g.
specified: 205 V, selected: 208 V).
4.
Repeat this procedure for all three AC cards.
5.
Set the DIP switches on the sine card (4) according to the
specifications in the following tables. Please note the requirements laid
down by the BDEW (German Federal Association for the Energy and
Water Industries) in chapter 2.5.3 of the Technical Directive
“Generation systems on medium voltage grids”, June 2008 edition, are
applicable for the Voltwerk VC WL series EEG model.
DO_BA_2009_1ENG_DVo
02.10.2009
Basic frequency 50 Hz
Lower shutdown
Upper shutdown
S1
S2
S3
S4
47.5 Hz
50.2 Hz
off
off
off
off
49.5 Hz
50.5 Hz
off
off
off
on
47 Hz
51 Hz
off
off
on
off
47.5 Hz
51 Hz
off
off
on
on
48 Hz
51 Hz
off
on
off
off
49 Hz
51 Hz
off
on
off
on
47.5 Hz
51.5 Hz
off
on
on
off
47.5 Hz
52 Hz
off
on
on
on
Basic frequency 60 Hz
Lower cut-out
Upper cut-out
S1
S2
S3
S4
59.8 Hz
60.2 Hz
on
–a
off
off
on
–
a
on
off
a
off
on
on
on
59.5 Hz
60.5 Hz
59 Hz
61 Hz
on
–
57 Hz
60.2 Hz
on
–a
a) The status of the DIP switch is not analysed.
Voltwerk VC WL series EU model
Operating manual
51
5 Installation
Material damage due to foreign objects
NOTICE
When open, the control cabinet may become dirty.
ENGLISH
|
Result
5.8
The control cabinet should be immediately closed and locked after any
work.
6.
Fit the plexiglass cover, screw into place and seal.
7.
Close the control cabinet and seal it.
Grid characteristics have been changed.
Measurements
To complete the installation, make the measurements and record the
results as well as the measuring equipment used. The results must comply
with the requirements of the applicable standards and directives, as well
as the device specifications (see Chapter Specifications, page 85).
Safety instructions
|
Use any safety devices fitted to the device and follow any safety
instructions shown on the device.
|
Take note of safety guidelines for conducting measurements on live
system and device components.
|
Standards for measurements taken from the solar generator (DC) and of
the mains voltage (AC) must be carefully adhered to.
|
Before carrying out the measurement, read the Operating manual for the
measuring equipment, and observe it while performing such tasks.
Tools required
|
The appropriate, tested equipment. N.B. Due to faulty connections,
voltages > 1,000 VDC may also be present.
|
Insulated measuring equipment acc. to DIN EN 61557-2
|
Earth-resistance measuring equipment acc. to DIN EN 61557-9
|
Faulted circuit-impedance measuring equipment acc. to DIN EN 61557-3
Open external disconnecting devices (solar generator, grid connection
and auxiliary power supply) and secure them against being switched on
again.
2.
Verify that the system is fully deenergised.
DO_BA_2009_1ENG_DVo
1.
02.10.2009
Carrying out the measurements
52
Operating manual
Voltwerk VC WL series EU model
5 Installation
Risk of fatal injury due to residual voltages
Residual voltages inside the device can result in fatal surges. Capacitors
may be charged even after the device is switched off.
When Voltwerk VC WL series EU model central inverters are
disconnected via the On/Off switch, voltage is still present at the AC and
DC connections. The On/Off switch is not a DC disconnector.
|
Open all external and internal disconnectors and secure them against
being switched back on.
|
After switching off the device, always wait for a period of 8 minutes
before touching.
|
A suitable measuring instrument should be used to verify that the
device is deenergised, in accordance with applicable guidelines.
3.
Open internal disconnectors (DC power circuit breakers, LV HRC
disconnectors for AC output and LV HRC disconnectors for surge
voltage protection).
4.
Remove the plexiglass cover.
Risk of fatal injury through disregard of the Operating manual
DANGER
Certain measuring equipment can be used when the power supply is
connected. There is a risk of fatal injury if measuring equipment is not
used in the prescribed manner.
|
Check the instructions in the measuring equipment operating manual.
|
Follow the instructions in the Operating manual.
5.
Connect the measuring equipment.
6.
Cover adjacent live device parts.
7.
Close the external disconnect facilities for the solar generator and the
grid connection.
8.
Measure the grid voltage (AC), i.e. phase to phase as well as phase to
N and phase to PE. The measured voltage must be within the
parameters given in the specifications (see Chapter Specifications,
page 85).
DO_BA_2009_1ENG_DVo
02.10.2009
Measure the rotary field of the grid voltage (AC). Ensure that:
Voltwerk VC WL series EU model central inverters only switch on with a
clockwise rotary field. The incorrect rotary field will prevent the device
from connecting to the public grid.
Measure the solar generator voltage (DC) and polarity, observing
permissible tolerances:
|
Voltwerk VC WL 110–280: 493–965 V
|
Voltwerk VC WL 300: 530–965 V
The faulted circuit impedance is the resistance of the current loop (device,
conductor, protective earth) in the event of a frame fault (a conductive
connection between the phase conductor and the protective earth). The
value of the faulted circuit impedance determines the size of the short
circuit current. The latter must not exceed the value specified by DIN VDE
0100, to ensure that the system's protective equipment (fuse, circuit
breaker) will trip out/blow reliably.
Voltwerk VC WL series EU model
Operating manual
53
ENGLISH
DANGER
5 Installation
9.
Measure the faulted circuit impedance. Ensure that:
|
the faulted circuit impedance is measured between all three
conductors (L1, L2 and L3) and the protective earth (PE).
ENGLISH
The earthing resistance is the electrical resistance between the protective
earth connection and the reference potential of the ground. Earthing
resistance is measured by running an alternating current over the earthing
conductor, the earth electrode and the earth-spreading resistor. It can be
measured either directly or indirectly. For direct measurement, an earth
probe is required. For indirect measurement, the approximate earthing
resistance is determined using an 'earth-electrode loop resistance
measurement', without the use of a probe.
R A $ UL/IF
R A Earthing resistance (protective earth)
U L Contact voltage
I F Residual current
10. Measure the earthing resistance. To do this, follow the instructions in
the measuring equipment operating manual.
The insulation resistance is the electrical resistance among the various
conductors and between the conductors and the protective earth (PE).
11. Measure the insulation resistance. To do this, follow the instructions in
the measuring equipment operating manual.
12. Voltwerk VC WL series EEG model: measure the energy supplier's
signal at the inverter and adjust to the supplier's requirements.
13. Carry out other measurements as required by standards.
14. Measure the auxiliary power supply. Ensure that the voltage is within
the specified parameters (see chapter 4.4.2, page 32).
15. Put the plexiglass cover in place.
16. Close the LV HRC disconnector for surge voltage protection. Ensure
that: the disconnector clamp is tilted upwards with one hand and firmly
pressed on.
17. Close all disconnectors (DC power circuit breakers and LV HRC
disconnectors for AC output).
18. Screw the plexiglass cover into place.
The measurements have been completed.
DO_BA_2009_1ENG_DVo
Result
02.10.2009
19. Close the front door.
54
Operating manual
Voltwerk VC WL series EU model
6 Commissioning
Commissioning
6.1
ENGLISH
6
Filling out the commissioning report
Before commissioning, inspect the installation. To do this, consult
|
safety devices and safety instructions on the device,
|
safety guidelines for conducting measurements on live system and
device components,
|
the operating manual for the measuring equipment.
Before commissioning, inspect the configuration of the system and the
cable routing. If the necessary documents are missing, contact the
operator of the photovoltaic system.
Risk of fatal injury due to residual voltages
Residual voltages inside the device can result in fatal surges. Capacitors
may be charged even after the device is switched off.
When Voltwerk VC WL series EU model central inverters are disconnected
via the On/Off switch, voltage is still present at the AC and DC
connections. The On/Off switch is not a DC disconnector.
|
Open all external and internal disconnectors and secure them against
being switched back on.
|
After switching off the device, always wait for a period of 8 minutes
before touching.
|
A suitable measuring instrument should be used to verify that the device
is deenergised, in accordance with applicable guidelines.
Tools required
|
The appropriate, tested equipment. N.B. Due to faulty connections,
voltages U > 1,000 VDC may also be present.
DO_BA_2009_1ENG_DVo
02.10.2009
Filling out the report
1.
Fill out the Commissioning report, page 79 ff.
Measured data must comply with the requirements of the applicable
standards and directives, as well as the device specifications (see
chapter Specifications, page 85).
Voltwerk VC WL series EU model
Operating manual
55
6 Commissioning
6.2
Putting the device into operation
Before putting the device into operation, all the LED indicators on the front
door are switched off.
ENGLISH
Putting the device into operation
1.
Fit and close all safety covers.
2.
Close all disconnectors and switch on the DC power circuit breaker in
the device.
3.
Close and lock cabinet doors.
4.
Set the On/Off switch on the front door to 0.
5.
Close the external DC disconnection device
6.
Close the external AC disconnection device.
7.
Switch on the auxiliary power supply.
8.
Set the On/Off switch on the front door to I.
Device is ready for operation.
Once the AC and DC grids have been switched on, the inverter activates
the LED indicators on the front door.
ON
SG
GRID
FAULT
Meaning
Device has just been switched on.
Self-test for about 5 seconds.
Grid connection mode
| Solar generator voltage/output too low
| No power fed to the grid
If the solar generator voltage is sufficient,
the device will wait 2–5 minutes before it
starts to feed power to the grid.
Grid feed-in mode
Inverter operating normally
LED is constantly lit
LED is off
The operating frequency of central inverters lies within a clearly audible
range. The noises which are perceived as a type of screeching, hissing or
squeaking are typical of the device and represent no impairment to
operation.
56
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
02.10.2009
LED is flashing
6 Commissioning
Voltwerk VC WL series EEG model central inverters can only feed in to the
grid at full output if
|
fGrid = 47.5–50.05 Hz and
|
the mains voltage is at least 95% of the rated mains voltage (see
chapter Specifications, page 85)
ENGLISH
there is no output reduction due to the presence of an external signal,
Device is in operation.
DO_BA_2009_1ENG_DVo
02.10.2009
Result
|
Voltwerk VC WL series EU model
Operating manual
57
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ENGLISH
6 Commissioning
58
Operating manual
Voltwerk VC WL series EU model
7 Maintenance
Maintenance
7.1
ENGLISH
7
Maintenance interval
Central inverter
Maintenance interval
2 years
This period may be shortened owing to local conditions. Reasons for a
shortened maintenance interval are:
|
High level of stress caused by deposits of dirt or dust, e.g. on farms
|
Vibration e.g. if the device is sited in direct proximity to railway lines or
arterial roads
|
High number of nominal load hours e.g. in tracked systems
|
Constantly high or sharply fluctuating ambient temperatures e.g. desert
or steppe locations.
A proper inspection will uncover faults such as a defective protective
earth, missing sections of shielding, damaged supply cables, parasitic
voltages on the housing. Replace any defective components and wear
parts.
Filters
The maintenance interval is dependent on the location (cleanness of the
air) and on the ventilation plan for the operating area. Remove deposits of
dirt regularly, in order to avoid a reduction in the amount of cooling air or
impermissible counterpressure.
Carry out regular maintenance on the filters as well as the supply and
exhaust air passages and any openings in the operating area.
7.2
Safety instructions
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Risk of fatal injury due to high voltages
Death or serious injury could result when working on high-voltage and
high-current electrical systems and live parts.
|
Cover or shield any adjacent live components. N.B. On photovoltaic
systems, the power source is always active during the hours of daylight.
|
Before starting any work on electrical systems:
|
Disconnect the system
|
Ensure that it is secured against being switched back on
|
Verify that the system is fully deenergised
|
Earth and short-circuit the system
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Operating manual
59
7 Maintenance
Risk of fatal injury due to residual voltages
Residual voltages inside the device can result in fatal surges. Capacitors
may be charged even after the device is switched off.
ENGLISH
When Voltwerk VC WL series EU model central inverters are disconnected
via the On/Off switch, voltage is still present at the AC and DC
connections. The On/Off switch is not a DC disconnector.
|
Open all external and internal disconnectors and secure them against
being switched back on.
|
After switching off the device, always wait for a period of 8 minutes
before touching.
|
A suitable measuring instrument should be used to verify that the device
is deenergised, in accordance with applicable guidelines.
Risk of fatal injury from arcing and short circuit currents
Very high DC voltages (no zero point) may exist in photovoltaic systems,
which could cause arcing in the event of faults or if components such as
fuses or plugs are not used in the specified manner.
The short circuit current of the solar generator is only slightly higher than
the maximum operating current and is always dependant on current
irradiation levels. This means that, where short circuits occur, there is no
definite guarantee that circuit breakers will be tripped.
|
Use components in the correct manner.
Risk of fatal injury due to lack of assistance
In the event of an accident a second person can lend assistance.
|
Only carry out work if a second person is present.
Risk of fatal injury through disregard of safety instructions
If the sequence of steps for installation and the safety instructions are not
followed, the device may be permanently damaged and electrical
accidents may occur with serious health consequences.
|
Observe the sequence of procedure steps for installation and follow the
safety instructions.
Risk of injury due to high temperatures
After switching off the product, wait for an appropriate period before
touching.
|
Do not touch hot components.
Material damage due to foreign objects
Foreign objects such as film, plastic bags and pieces of paper may be
sucked in by the fans, putting the product at risk. Foreign objects stored in
the operating area may obstruct the ventilation equipment, putting the
product at risk. This may lead to losses in yield and damage to the device.
|
60
Keep the operating area dry, clean and free of foreign objects.
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
|
02.10.2009
The components of the product may reach temperatures of up to 150 °C,
which can cause serious burns.
7 Maintenance
|
Keep the operating area free of combustible or explosive materials and
aggressive or corrosive gases.
Required tools and measuring instruments
Appropriate screwdriver
|
Torque wrench
|
Vacuum cleaner
|
Brush
|
Cloth
|
Control cabinet key
|
Measuring equipment for determining the flow rate, e.g. anemometer
|
Clip-on ammeter for direct current
|
Insulated measuring equipment acc. to DIN EN 61557-2
|
Earth-resistance measuring equipment acc. to DIN EN 61557-9
|
Faulted circuit-impedance measuring equipment acc. to DIN EN 615573
|
Voltmeter, measuring range 0–1,000 VDC; 0–500 VAC. N.B. Due to faulty
connections, voltages > 1,000 VDC may also be present.
|
Protective earth test device
ENGLISH
|
Please note, that measuring equipment and all cables should be certified
to protection class CAT II (1,000 V), in accordance with EN 61010-1.
7.3
Check the device when disconnected
Requirements
Auxiliary power supply switched off.
|
External and internal disconnectors open and secured against being
switched back on.
|
Delay of 8 minutes observed.
|
Deenergised state of the device verified using a suitable measuring
instrument, in accordance with applicable guidelines.
|
DC power circuit breaker in the device open.
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|
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Operating manual
61
7 Maintenance
Checking the operating area
ENGLISH
NOTICE
Material damage due to foreign objects
Foreign objects such as film, plastic bags and pieces of paper may be
sucked in by the fans, putting the product at risk. Foreign objects stored
in the operating area may obstruct the ventilation equipment, putting the
product at risk. This may lead to losses in yield and damage to the
device.
|
Keep the operating area dry, clean and free of foreign objects.
|
Keep the operating area free of combustible or explosive materials and
aggressive or corrosive gases.
1.
2.
Make sure there is air circulation at the fan vents. Please note:
|
The top of the device must remain unobstructed, to allow air to
escape.
|
Exhaust air from the inverter must be able escape unimpeded.
|
The cooling air intake is on the bottom of the device; so it must be
set up to take account of this. The central inverter must not draw in
any dirt.
|
Clean dust and sand from the floor.
|
Clean or, if necessary, replace the air filter in the base of the device.
Check the supply air to the operating area. Ensure that:
|
3.
only G3 or G4 class filters (EN 779) are used.
the quantity of air is checked for each device. Ensure that:
central inverters must be set up on a raised floor or base to ensure that
air can be sufficiently filtered and drawn in through the inlet opening in
the base of the central inverter.
Required volume of air
Voltwerk VC WL 110
1,500 m 3/h
Voltwerk VC WL 280–300K
3,500 m³/h
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Level of performance
62
Operating manual
Voltwerk VC WL series EU model
7 Maintenance
Result
Checking the operating area. Please note:
|
The operating area must be dry, clean and free of foreign objects.
Foreign objects such as film, plastic bags and pieces of paper may
be sucked in by the fans, putting the device at risk.
|
The operating area must be free of combustible or explosive
materials.
|
The cooling and ambient air of the inverter must be free of
combustible or explosive gases.
|
The cooling air of the inverter and the ambient air must be free of
aggressive, caustic and corrosive gases (e.g. ammonia, sulphurous
gases and similar).
|
The cooling and ambient air of the inverter must be free of corrosive
gases (such as salt-laden air).
|
In order to prevent a 'short circuit' between the two different air
flows, fresh air and exhaust air must be structurally separated.
|
The maximum humidity of the cooling and ambient air is < 95 %.
ENGLISH
4.
The operating area has been checked.
Checking the external area
Result
1.
Check the locking mechanisms on the device and the interconnected
control cabinets or supply units.
2.
Examine the housing for discolouration.
3.
Clean the grilles over the inverter fans.
4.
Check the cross-section, routing, connection and identification of
protective earths and earthing conductors.
5.
Inspect the external AC and DC terminal boxes according to the
manufacturer's specifications.
6.
Inspect the AC and DC connection cables to the central inverter. To do
this, check
|
the insulation for damage,
|
the fastening and routing of the cables,
|
Crushing and overheating of the cables.
The external area has been inspected.
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Checking the internal area
1.
Check the plexiglass covers.
2.
Check cable connections for firm jointing.#
Replace damaged lines or cables.
3.
Check the tightening torques of the screw connections on the AC and
DC connection bars and the PE connection bar.
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Operating manual
63
7 Maintenance
ENGLISH
Tightening torques
Thread size
Tightening torque (Nm)
M10
54
M12
93
4.
Check screw connections. Please note that, bolts and nuts are not
treated (greased).
5.
Check the copper rails for discolouration and corrosion.
6.
Check the device for visible damage, areas of discolouration or signs
of scorched or overheated cables and cable connections.
7.
Check the device for deposits of dirt and areas of damage caused by
animals (e.g. gnawing damage caused by rodents).
8.
Check for areas of noticeable discolouration inside the interior and on
components.
9.
Check the surge voltage protection devices. Please note:
|
If the indicator is red, replace the surge voltage protection devices
(see chapter 9.2.2, page 76).
|
Inspect the LV HRC circuit breaker (base and cover), ensuring that it
does not exhibit signs of damage or scorch marks.
|
Inspect the base of the surge voltage protection device, ensuring
that it does not exhibit signs of damage or scorch marks.
|
Check the fuse clip for continuity, ensuring that it does not exhibit
signs of damage or scorch marks.
10. Check the fuse indicators on varistors and fuses. Please note that the
fuses must be replaced every 6 years. Fuses older than this may blow
prematurely, leading to loss of yield.
11. Check all fuses for corrosion or erosion on the contact plates.
12. Check for dust deposits and water traces.#
Clean the capacitors with a brush. Clean the device with a vacuum
cleaner. Please note:
Result
|
Do not damage any components, cables or other fixtures.
|
If a compressor is used, maintain a minimum distance of 30 cm.
The interior area has been checked.
Open the control cabinet.
2.
Remove the plexiglass cover.
Risk of fatal injury due to high voltages
DANGER
Death or serious injury could result when working on high-voltage and
high-current electrical systems and live parts.
|
3.
64
Cover or shield any adjacent live components.
Switch on the auxiliary power supply.
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
1.
02.10.2009
Check the device fan
7 Maintenance
Material damage due to contact erosion
The contacts of the contactor are only closed while the actuating
mechanism is powered. A contactor which is not fully, or which is only
belatedly actuated may be damaged, causing a contact erosion.
|
Actuate contactor K91 quickly and with adequate force.
ENGLISH
NOTICE
(1)
7.1:
4.
Contactor K91 (1) on the upper top-hat rail in the control cabinet
Actuate contactor K91 rapidly with a solid and fully insulated object
(diameter approx. 0.5 cm).
All fans come on. Note any noises from the fan.
Result
5.
Switch off the auxiliary power supply.
6.
In the event of unusual fan noises, determine which fan is causing
these and replace it. If you require help, contact the manufacturer
(contact details on the back of the manual).
7.
Fit the plexiglass cover, screw into place and seal.
8.
Close the control cabinet and seal it.
The device fans have been checked.
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Checking the control cabinet
1.
Open the control cabinet.
2.
Check the control cabinet for visible damage, areas of discolouration or
signs of scorched or overheated cables and cable connections.
3.
Remove the plexiglass cover.
4.
Check card sets for water traces and dust deposits.
5.
Gently press down on the card sets on the front. This ensures that the
card sets are in contact.
6.
Inspect the control cabinet for deposits of dirt caused by animals and
damage due to gnawing.
7.
Check the level of erosion on the auxiliary relay, determine the cause
and replace if necessary.
8.
Check the DIP switch settings. For information on this, consult the
energy supplier's specifications.
9.
Fit the plexiglass cover, screw into place and seal.
10. Close the control cabinet and seal it.
Result
The control cabinet has been inspected.
Voltwerk VC WL series EU model
Operating manual
65
7 Maintenance
7.4
Measurements
ENGLISH
Requirements
|
Disconnect the inverter and secure it against being switched back on.
|
Verify that the inverter is fully deenergised. N.B. On photovoltaic
systems, the power source is always active during the hours of daylight.
|
Switch off the auxiliary power supply.
|
Safety covers closed.
|
On/Off switch on the front door set to 0.
|
All disconnectors as well as the DC power circuit breaker inside the
device are open.
Risk of fatal injury due to residual voltages
Residual voltages inside the device can result in fatal surges. Capacitors
may be charged even after the device is switched off.
When Voltwerk VC WL series EU model central inverters are disconnected
via the On/Off switch, voltage is still present at the AC and DC
connections. The On/Off switch is not a DC disconnector.
|
Open all external and internal disconnectors and secure them against
being switched back on.
|
After switching off the device, always wait for a period of 8 minutes
before touching.
|
A suitable measuring instrument should be used to verify that the device
is deenergised, in accordance with applicable guidelines.
Risk of fatal injury through disregard of the Operating manual
Certain measuring equipment can be used when the power supply is
connected. There is a risk of fatal injury if measuring equipment is not
used in the prescribed manner.
|
Check the instructions in the measuring equipment operating manual.
|
Follow the instructions in the Operating manual.
1.
Measure the faulted circuit impedance. Ensure that:
|
66
The faulted circuit impedance is measured between all three
conductors (L1, L2 and L3) and the protective earth (PE).
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
The faulted circuit impedance is the resistance of the current loop (device,
conductor, protective earth) in the event of a frame fault (a conductive
connection between the phase conductor and the protective earth). The
value of the faulted circuit impedance determines the size of the short
circuit current. The latter must not exceed the value specified by DIN VDE
0100, to ensure that the system's protective equipment (fuse, circuit
breaker) will trip/blow reliably.
02.10.2009
Measuring
The earthing resistance is the electrical resistance between the protective
earth connection and the reference potential of the earth. Earthing
resistance is measured by running an alternating current over the earthing
conductor, the earth electrode and the earth-spreading resistor. It can be
measured either directly or indirectly. For direct measurement, an earth
probe is required. For indirect measurement, the approximate earthing
resistance is determined using an 'earth-electrode loop resistance
measurement', without the use of a probe.
R A $ U L/I F
R A Earthing resistance (protective earth)
U L Contact voltage
I F Residual current
2.
Measure the earthing resistance. To do this, follow the instructions in
the measuring equipment operating manual.
The insulation resistance is the electrical resistance among the various
conductors and between the conductors and the protective earth (PE).
3.
Measure the insulation resistance. To do this, follow the instructions in
the measuring equipment operating manual.
4.
Close the LV HRC disconnectors.
5.
Remove the surge voltage protection.
6.
Measure the device's insulation resistance. To do this:
7.
Result
|
measure L1 against PE,
|
measure L2 against PE,
|
measure L3 against PE,
|
measure N against PE,
|
follow the instructions in the measuring equipment operating
manual.
Check the resistance of the On/Off switch on the front door.
The measurements have been completed.
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The device may be operated again (see chapter 6, page 55).
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Operating manual
67
ENGLISH
7 Maintenance
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7 Maintenance
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Operating manual
Voltwerk VC WL series EU model
8 Troubleshooting
Troubleshooting
Voltwerk VC WL series EU model central inverters work automatically. If a
fault occurs with the inverter, the most recent fault message is displayed
on the LED indicators on the front door.
8.1
Fault report
In the event of a fault, the actual condition of the central inverter must be
recorded.
Reporting a fault
1.
First, leave the central inverter as you find it.#
Do not switch the central inverter off.
2.
Record the status of the LED indicators on the front door. Use the
terms: “flashing”, “on”, “off”
3.
Record traces of water and smoke residue.
4.
Record the actual condition with images.
Risk of fatal injury due to high voltages
DANGER
Death or serious injury could result when working on high-voltage and
high-current electrical systems and live parts.
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02.10.2009
|
Cover or shield any adjacent live components. N.B. On photovoltaic
systems, the power source is always active during the hours of
daylight.
5.
Open the front door.
6.
Carry out a visual inspection.
7.
Record the actual condition #
(loose, faulty parts, surge voltage protection, etc.).
8.
Open the control cabinet.
9.
Record the actual condition.
10. Record the status of the sine card LED indicators. Use the terms:
“flashing”, “on”, “off”
Three LED indicators are visible on the right of the sine card.
11. Record the status of the LED indicators on the AC card. Use the terms:
“flashing”, “on”, “off”
Six LED indicators are visible on each of the three identical AC cards.
These are numbered from left to right.
12. Voltwerk VC WL series EEG model: Record the values on the display
for the LOGO PLC.
13. Voltwerk VC WL series EEG model: Record the values on the display
for the frequency transducer.
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Operating manual
69
ENGLISH
8
8 Troubleshooting
14. Close and lock the control cabinet and front door.
Result
ENGLISH
8.2
The fault has been recorded.
LED indicators on the front door
The Fault LED indicator may light up or flash.
|
The Fault LED indicator is lit.
Inverter detects a fault which is probably irreversible and switches off.
|
The Fault LED indicator is flashing.
Inverter probably detects a reversible, temporary fault and switches off
temporarily. It normally switches back on automatically once the fault has
been cleared.
SG
GRID FAULT
Possible cause
Action
Grid fault
| Grid fuse faulty
| Series fuse for the surge
voltage protection device
faulty
| Grid cabling to the central
inverter faulty
| Wrong rotary field
| Disconnector at the grid
feed-in point is faulty
| Grid voltage or frequency
outside tolerance range
| Grid synchronisation faulty
due to faults in the grid
voltage
| Grid impedance too high
Internal fault
| Fault after completion of
self-test
| Fault when connecting to
grid
| Defective grid contactor
| Defective output stage
| Power stage does not
connect
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Restart using the On/Off switch of the
front door.
Observe a delay of at least 20 seconds
before restarting.
If the fault is still present after a restart,
contact the manufacturer's Service
department.
Check the grid contactor. If the grid
contactor is defective, contact the
manufacturer's Service department.
If the cause of the fault has been
overcome, the device will switch back
on.
DO_BA_2009_1ENG_DVo
|
Check mains voltage.
Check grid fuse.
Check the series fuse for the surge
voltage protection device.
Check the grid wiring.
Check the installation and DC grid.
Change the rotary field.
Check the disconnector.
Observe a delay of 180 seconds.
Voltwerk VC WL series EEG model:
observe a delay of 30 seconds.
If the cause of the fault has been
overcome, the device will switch back
on.
02.10.2009
ON
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Operating manual
Voltwerk VC WL series EU model
8 Troubleshooting
SG
GRID FAULT
Possible cause
Action
Surge voltage, overheating
| Surge voltage on the solar
generator
The device automatically
disconnects from the grid in the
event of surge voltage (on the
DC side) by opening the DC
disconnector.
Check the sizing of the solar generator.
Ambient temperature too high
(see chapter 4.1, page 25)
| Lower the ambient temperature.
| Check whether, due to space
considerations, a 'short circuit' is likely
to occur between the inlet and exhaust
air flows, i.e. the inverter sucks in its
| Overheating in the device
own exhaust air.
The device automatically
| Check the ventilation of the operating
disconnects from the grid in the
area (see chapter 4.3, page 28).
event of considerable
If the cause of the fault has been rectified,
overheating of the reactors or
the DC disconnector must be manually
of the transformer by opening
reset.
the DC disconnector.
The device does not automatically switch
back on after this particular fault has
occurred.
Insulation resistance fault on
the solar generator
|
|
|
|
|
Check the insulation resistance.
Establish and rectify the cause of the
insulation resistance fault.
If, owing to the type of module used,
the solar generator has been
consciously earthed, the SG LED
indicator flashes permanently for
safety reasons.
LED is constantly lit
LED is flashing
LED is off
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The status of this LED indicator has no significance for the
information currently displayed.
Voltwerk VC WL series EU model
Operating manual
71
ENGLISH
ON
8 Troubleshooting
8.3
LED indicators for sine card
LED status indicator
Possible cause
Action
LED (1) off
Grid synchronisation has not yet
occurred.
|
Wait 2–5 minutes.
Sine card faulty
|
Contact the manufacturer's
Service department; the sine
card must be replaced.
LED (2) off
Phase sequence reversed
|
Change rotary field (clockwise
rotary field).
LED (3) off
An AC card is not reporting “Voltage
OK”
|
Check mains voltage
Ribbon connection cable ST1
defective
|
Replace ribbon connection
cable ST1.#
The cable connects the sine
card to the CPU card.
Sine card faulty
|
Contact the manufacturer's
Service department; the sine
card must be replaced.
8.4
LED indicators for AC cards
The three AC cards work independently. Six LED indicators are visible on
each of the three identical AC cards. These are numbered from left to right.
LED status indicator
Possible cause
Action
LED (1) on
Current limitation active
Card set faulty
|
|
|
Check activation.
Restart the device.
If the fault persists after a
restart, contact the
manufacturer's Service
department; the card set must
be replaced.
LED (2) on
Output stage switches off
Fault in the control technology
Card set faulty
Output stage faulty
Surge voltage on the transformer's
primary side
|
|
|
Check activation.
Restart the device.
If the fault persists after a
restart, contact the
manufacturer's Service
department; the card set must
be replaced.
LED (3) on
AC surge voltage
DIP switches wrongly set (different
national limitations)
|
Check the DIP switches (note
the specifications of the
energy supplier).
72
Operating manual
Voltwerk VC WL series EU model
02.10.2009
If one or more LED indicators on the AC cards are flickering, this does not
indicate a fault.
DO_BA_2009_1ENG_DVo
ENGLISH
Three LED indicators are visible on the right of the sine card.
LED status indicator
Possible cause
Action
LED (4) off
AC voltage too low
Grid fault
The DIP switches are set incorrectly
|
|
Check mains voltage
Check the voltage in the
potentiometer card (assembly
F4.1 to F4.3).
The DIP switches are set incorrectly
|
Check the DIP switches (note
the specifications of the
energy supplier).
LED (5) on
Output stage faulty
Short circuit
Defect in the activation cable
Card set fault
|
LED (6) off
Minimum voltage not achieved or
Maximum voltage exceeded
|
|
Remove the activation cable
from the reverse wiring.
If the fault persists:
| Check the connection of the
card set to the reverse wiring.
If the fault persists:
| replace the card set,
| plug the connector back in
If the fault persists:
| Replace activation lines.
If the fault persists, contact the
manufacturer's Service
department.
Check mains voltage
Check the DIP switches (note
the specifications of the
energy supplier).
If faults occur, the AC cards can be swapped around to assist in localising
the fault. If the cause of the fault is on a particular card, it will recur in the
card's new location. In such a case, contact the manufacturer's Service
department; the AC card must be replaced.
8.5
Delays
When analysing a fault, note the switch-on delay of the inverter.
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Voltwerk VC WL series EU model central inverters automatically adjust
their switch-on delay to account for the current situation. This prevents
ineffective attempts to connect to the grid (e.g. at sunset).
A waiting time of a few minutes is observed when switching on after grid
malfunctions. If the device is switched off due to insufficient power input
and the solar generator voltage then rises back above the switch-on
threshold, the switch-on delay will be about four minutes.
If the inverter is not feeding in or is only feeding in at a reduced level, and
the following requirements have been met:
|
good irradiation,
|
solar generator correctly connected and switched on,
|
LED indicators indicate that the inverter is ready for operation,
then
|
check the installation of the solar generator and the AC grid.
If the fault persists, contact the manufacturer's Service department.
Voltwerk VC WL series EU model
Operating manual
73
ENGLISH
8 Troubleshooting
8 Troubleshooting
|
Voltwerk VC WL series EEG model central inverters: check the energy
supplier's signal. The signal received by the energy supplier's interface
on the inverter must meet the energy supplier's requirements.
ENGLISH
Voltwerk VC WL series EEG model central inverters can only feed in to the
grid at full output if:
8.6
|
there is no output reduction due to the presence of an external signal,
|
fGrid = 47.5–50.05 Hz and
|
the mains voltage is at least 95% of the rated mains voltage (see
chapter Specifications, page 85)
Manufacturer's service centre
In the event of faults, contact the manufacturer's Service department
(contact details can be found on the back of the manual). To allow the
manufacturer to respond quickly and appropriately, please provide the
following details:
|
Invoice number (delivery note if applicable)
|
Serial number of the inverter
|
A brief description of the fault and a fault report
What does the LED indicators' fault report look like?
Is the fault reproducible?
|
Was the inverter working properly before the fault?
|
Information about the PV system such as solar module type, circuitry,
solar generator voltage
|
How long is the mains cable and what is the cable cross-section?
|
What are the irradiation conditions?
|
Voltwerk VC WL series EU model central inverters: what is shown on the
display of the LOGO PLC?
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02.10.2009
|
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74
Operating manual
Voltwerk VC WL series EU model
9 Repairs
Repairs
9.1
ENGLISH
9
Safety information
Risk of fatal injury from arcing and short circuit currents
Very high DC voltages (no zero point) may exist in photovoltaic systems,
which could cause arcing in the event of faults or if components such as
fuses or plugs are not used in the specified manner.
The short circuit current of the solar generator is only slightly higher than
the maximum operating current and is always dependant on current
irradiation levels. This means that, where short circuits occur, there is no
definite guarantee that circuit breakers will be tripped.
|
Use components in the correct manner.
Risk of fatal injury due to high voltages
Death or serious injury could result when working on high-voltage and
high-current electrical systems and live parts.
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Cover or shield any adjacent live components. N.B. On photovoltaic
systems, the power source is always active during the hours of daylight.
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Before starting any work on electrical systems:
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Disconnect the system
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Ensure that it is secured against being switched back on
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Verify that the system is fully deenergised
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Earth and short-circuit the system
Risk of fatal injury due to residual voltages
Residual voltages inside the device can result in fatal surges. Capacitors
may be charged even after the device is switched off.
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When Voltwerk VC WL series EU model central inverters are disconnected
via the On/Off switch, voltage is still present at the AC and DC
connections. The On/Off switch is not a DC disconnector.
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Open all external and internal disconnectors and secure them against
being switched back on.
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After switching off the device, always wait for a period of 8 minutes
before touching.
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A suitable measuring instrument should be used to verify that the device
is deenergised, in accordance with applicable guidelines.
Risk of fatal injury due to lack of assistance
In the event of an accident a second person can lend assistance.
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Only carry out work if a second person is present.
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9 Repairs
9.2
9.2.1
Fuse replacement
LV HRC fuses
ENGLISH
Requirements
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Disconnect the inverter and secure it against being switched back on.
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Verify that the inverter is fully deenergised. N.B. On photovoltaic
systems, the power source is always active during the hours of daylight.
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Switch off the auxiliary power supply.
Replacing LV HRC fuses
1.
Quickly open the LV HRC disconnector.
2.
Remove the fuses.
3.
Inspect the LV HRC disconnector (base and cover), ensuring that it
does not exhibit signs of damage or scorch marks.
4.
Replace the fuses. Ensure that:
5.
Result
9.2.2
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you always replace the complete set. This prevents incipient
damage from becoming a problem.
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the same type of fuse is used: #
Voltwerk VC WL 110: LV HRC1 160 A; 690 V#
Voltwerk VC WL 280: LV HRC1 400 A; 690 V#
Voltwerk VC WL series EU model series fuse for surge voltage
protection: LV HRC00 125 A; 500 V#
Depending on the revision status of the inverter in question, the fuse
type may differ from the type specified here.
Quickly close the LV HRC disconnector. Ensure that:
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closing requires some force.
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the LV HRC disconnector is fully closed.
The fuses have been replaced. The device may be operated again
(see chapter 6, page 55).
Surge voltage protection device
The indicator for the surge voltage protection device in the inspection
window is red.
Requirements
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Disconnect the inverter and secure it against being switched back on.
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Verify that the inverter is fully deenergised. N.B. On photovoltaic
systems, the power source is always active during the hours of daylight.
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Switch off the auxiliary power supply.
Replacing the surge voltage protection device
1.
76
Pull the faulty surge voltage protection device out of the holder.
Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
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02.10.2009
Note
2.
Inspect the base of the surge voltage protection device, ensuring that
it does not exhibit signs of damage or scorch marks.
3.
Replace the surge voltage protection device. Ensure that:
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you always replace the complete set. This prevents incipient
damage from becoming a problem.
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the same type of fuse is used: #
A5.2 = VAL-MS 400ST#
A5.4 = VAL-MS 230ST#
Depending on the revision status of the inverter in question, the fuse
type may differ from the type specified here.
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you pay attention to orientation.
If a surge voltage protection device is faulty, the series fuse may also be
faulty or have suffered incipient damage.
If a series fuse is faulty, a grid fault is displayed. The device switches off.
Always inspect the series fuse and, if necessary, replace it.
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Result
9.2.3
The surge voltage protection device has been replaced. The device may be
operated again (see chapter 6, page 55).
Glass cartridge fuse
The glass cartridge fuse safeguards the grid monitoring and auxiliary
power supply for the device controller.
Requirements
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Disconnect the inverter and secure it against being switched back on.
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Verify that the inverter is fully deenergised. N.B. On photovoltaic
systems, the power source is always active during the hours of daylight.
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Switch off the auxiliary power supply.
Replacing the glass cartridge fuse
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(1)
1.
Remove the fuse insert from the fuse clip (1).
2.
Remove the fuse from the fuse insert.
3.
Check the fuse clip for continuity. ensuring that it does not exhibit signs
of damage or scorch marks.
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Operating manual
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ENGLISH
9 Repairs
9 Repairs
ENGLISH
4.
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you always replace the complete set. This prevents incipient
damage from becoming a problem.
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the same type of fuse with the same fuse rating is used: #
F4.1–4.3 = T1 L250V#
F4.4 = T10 L250V#
Depending on the revision status of the inverter in question, the fuse
type may differ from the type specified here.
5.
Place the fuse into the fuse insert.
6.
Place the fuse insert containing the new fuse into the fuse clip.
The fuse has been changed. The device can be operated again
(see chapter 6, page 55).
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Result
Replace the fuse Ensure that:
78
Operating manual
Voltwerk VC WL series EU model
Commissioning report
ENGLISH
Commissioning report
Before commissioning, inspect the installation.
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Use any safety devices fitted to the device and follow any safety
instructions shown on the device.
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Take note of safety guidelines for conducting measurements on live
system and device components.
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Before carrying out measurement, read the Operating manual for the
measuring equipment.
Risk of fatal injury due to residual voltages
Residual voltages inside the device can result in fatal surges. Capacitors
may be charged even after the device is switched off.
When Voltwerk VC WL series EU model central inverters are disconnected
via the On/Off switch, voltage is still present at the AC and DC
connections. The On/Off switch is not a DC disconnector.
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Open all external and internal disconnectors and secure them against
being switched back on.
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After switching off the device, always wait for a period of 8 minutes
before touching.
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A suitable measuring instrument should be used to verify that the device
is deenergised, in accordance with applicable guidelines.
Tools required
The appropriate, tested equipment. N.B. Due to faulty connections,
voltages > 1,000 VDC may also be present.
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Anemometer
Procedures
Desired result
1.
Inspect the
foundation that the
device is sited on.
Device standing on a
raised floor or base
Ground bears the weight
of the device.
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Change the
positioning of the
device. #
Cooling air is taken in
from underneath
(see chapter 4.3, page
28).
2.
Inspect the operating Operating area, including
area, including the
raised floor, is free of
raised floor.
foreign objects and
dampness.
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Clean the operating
area. Remove sand,
water and other dirt.
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Voltwerk VC WL series EU model
Actual result
Operating manual
Action in case of noncompliance
79
Commissioning report
Actual result
Action in case of noncompliance
3.
Inspect the transport Transport rails removed
rails.
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Remove the transport
rails.
4.
Measure the
temperature in the
operating area.
Voltwerk VC WL 110:
+45 to –20 °C
Voltwerk VC WL 280–
300K: +40 to –20 °C
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Set the temperature of
the operating area so
that the temperature
of air supplied to the
device is within
tolerances.
5.
Measure the inverter
cooling air quantity.
Voltwerk VC WL 110:
1,500 m³/h
Voltwerk VC WL 280–
300K: 2 x 1,750 m³/h
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Extend the supply and
exhaust openings.
Use external fans.
6.
Inspect the air filter
on the air inlet at the
base.
Filter clean
Class G3 or G4 filter
used
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Clean the air filter.
Replace the air filter.
7.
Measure the size of
the air inlet in the
operating area per
device.
Compare with the
ventilation design.
In order to prevent a
'short circuit' between
the two different air
flows, fresh air and
exhaust air must be
structurally separated.
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Expand the air inlet.
8.
Measure the size of
the air outlet in the
operating area per
device.
Compare with the
ventilation design.
In order to prevent a
'short circuit' between
the two different air
flows, fresh air and
exhaust air must be
structurally separated.
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Expand the air outlet.
9.
Check the pressure
loss.
The sum of the pressure
loss caused by flow
resistance must be less
than 70 Pa.
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Modify the operating
area.#
Exhaust air must be
able escape
unimpeded from the
device.
If necessary, install
external fans.
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10. Measure the
At least 300 mm
distance between
the device and the
ceiling or obstacles
such as cable guides
or lights.
80
Operating manual
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Change the
positioning of the
device.#
The top of the device
must remain
unobstructed, to allow
air to escape.
Voltwerk VC WL series EU model
02.10.2009
Desired result
DO_BA_2009_1ENG_DVo
ENGLISH
Procedures
Commissioning report
Desired result
Actual result
Action in case of noncompliance
11. Inspect the top of the No foreign objects on the
device.
device
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Remove foreign
objects.#
The top of the device
must remain
unobstructed, to allow
air to escape.
12. Inspect the cable
strain relief.
All connecting cables
must be secured using a
cable strain relief (cable
mounting rail).
|
Secure all connecting
cables with a cable
strain relief.
13. Remove any foreign
objects from inside
the device.
Device does not contain
any foreign objects such
as an earthing harness,
jumpers, tools or
measuring equipment
|
Remove foreign
objects.
14. Check the markings During manufacturing, all
(locking paint) on the the electrical screw
screw connections.
connections were
marked to make it easy
to recognise if one had
become loose.
|
If screw connections
in the device have
become loose,
contact the
manufacturer (contact
details on the back of
the manual). #
Do not operate the
device.
15. Check the electrical
connections for firm
jointing.
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With spring-loaded
terminals, ensure that
the cables are fully
inserted.
Only handle cable lugs
with approved press
or crimp tools.
Cables and lines are
connected tightly
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16. Check the tightening M10 = 54 Nm
torque of the terminal M12 = 93 Nm
blocks.
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Correct the tightening
torque.
17. Check the series
fuse for the auxiliary
power supply.
16 A, type B or
comparable
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Replace series fuses.
18. Check the external
fuse for the power
connection.
Voltwerk VC WL 110: #
160 A, LV HRC1
Voltwerk VC WL 280:
400 A, LV HRC3
Voltwerk VC WL 300:
630 A, LV HRC3
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Replace the fuses.
When using a circuit
breaker, set it to the
rated current of the
device.
19. Inspect the contact
for the card sets in
the control cabinet.
All card sets are in
contact
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Securely click the
cards into place (press
on the front of the
card).
20. Inspect the coupling
relays.
The coupling relays are
engaged
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Engage the coupling
relays.
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Operating manual
81
ENGLISH
Procedures
Commissioning report
Desired result
Actual result
Action in case of noncompliance
21. Measure the AC
(see
voltage, i.e. measure chapter Specifications,
phase to phase,
page 85
phase to N, and
phase to PE.
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22. Measure the auxiliary 230 V ± 20% 56–63 Hz
power supply.
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23. Measuring the rotary Clockwise rotary field
field of the grid
voltage (AC).
|
24. Measure the solar
generator voltage
(DC).
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Voltwerk VC WL 110–
280: 493 V–965 V
Voltwerk VC WL 300:
530 V–965 V
25. Check the polarity of
the DC connection.
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Inspect the
installation.
Check the AC grid.
Change the rotary
field.
Inspect the
installation.
Check the solar
generator.
Inspect the
installation.
Check the solar
generator.
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|
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Check the AC grid.
Inspect the AC cable.
Contact the energy
supplier.
27. Measure the earthing RA < 2 !
resistance. To do
RA $ U L/I F
this, follow the
instructions in the
measuring
equipment operating
manual.
|
Check the earth.
28. Measure the
In accordance with DIN
insulation resistance. EN 60204-1
To do this, follow the RISO %#1.0 M!
instructions in the
measuring
equipment operating
manual.
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Inspect the cabling.
29. Check the grid
characteristics.
|
Change the grid
characteristics
appropriately.
82
Compliant with DIN VDE
0100
Inspect the
installation.
Check the AC grid.
Grid characteristics meet
the energy supplier's
specifications
Operating manual
02.10.2009
26. Measure the faulted
circuit impedance.
Please note:#
The faulted circuit
impedance is
measured between
all three conductors
(L1, L2 and L3) and
the protective earth
(PE).
Inspect the
installation.
Check the AC grid.
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DO_BA_2009_1ENG_DVo
ENGLISH
Procedures
Commissioning report
Desired result
Actual result
Action in case of noncompliance
30. Voltwerk VC WL serie Data meets the energy
s EEG model:
supplier's specifications
measure the energy
supplier's signal on
the device.
|
Check the installation
of the cable for the
energy supplier signal
cable.
31. Check all plexiglass
covers.
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Fit plexiglass covers
and screw into place.
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All plexiglass covers are
fitted and screwed into
place.
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Operating manual
83
ENGLISH
Procedures
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ENGLISH
84
Operating manual
Voltwerk VC WL series EU model
Specifications
All Voltwerk VC WL series EU model central inverters have the following
characteristics:
|
Protection type against environmental influences: IP 20 acc. to IEC
60529
|
Maximum permissible air humidity 95%, non-condensing
|
Switches on automatically if there is sufficient solar generator power
|
In the event of overload, adjusts the operating point to the solar
generator characteristic curve
|
Maximum Power Point tracking (%#99% accuracy)
|
Earth fault monitoring
|
High performance varistors to act as surge voltage protection
|
Power factor Cos & %#0.99
|
Grid characteristics (voltage and frequency) can be adjusted to meet
country-specific standards and the specifications of the energy supplier
(see chapter 5.7, page 49)
|
Auxiliary power supply, single-phase, 230 V ± 20 % 56–63 Hz, TN
network
|
Transient emissions (acc. to DIN EN 61000-6-4:2007-09)
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Interference resistance (acc. to DIN EN 61000-6-2:2006-03)
Connections present of Voltwerk VC WL series EU model central inverters:
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4 DC input connections
L1, L2, L3, N, DC +, DC – and PE: M12 connection bolt
Auxiliary power supply: 1.5–2.5 mm² terminals
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Operating manual
85
ENGLISH
Specifications
Specifications
Installation and location
data
VC WL 110
VC WL 280
VC WL 300
ENGLISH
External dimensionsa (H x W x 1,800 x 1,21 1,800 x 2,01 1,800 x 2,01
D) [mm]
0 x 800
0 x 800
0 x 800
Weight [kg]
1,220
2,400
1,540
Ambient temperature [°C]
–20 to +45
–20 to +40
–20 to +40
Min. fan flow rate per device
[m³/h ]
1,500
3,500
3,500
Noise emissions [dB]
< 75
< 85
< 85
a) To account for transport packaging, add 200 mm to the depth and 100 mm to the length and width
of the devices.
DC input data
VC WL 110
VC WL 280
VC WL 300
Input voltage range [VDC]
Start-up input voltage [VDC]
965–493
965–493
965–530
515
515
550
Rated input voltage [VDC]
MPP voltage range [V DC]
510
510
540
493–780
493–780
530–780
Max. input current [ADC]
223
568
566
Input fuses (internal, thermal)
[A]
250
630
630
Efficiency levela
VC WL 110
VC WL 280
VC WL 300
Maximum efficiency factor
97.6 %
97.5 %
98.8 %
European efficiency factor
97.0 %
96.8 %
98.2 %
VC WL 110
VC WL 280
VC WL 300
Max. output [W]
290
770
770
Recommended series fuse [A] 16 A model
B
16 A model
B
16 A model
B
Power consumption in
55
standby mode, night mode [W]
60
60
Power consumption during
operationa [W]
60–770
60–770
4.2
4.1
55–290
Energy requirements for 8 hrs, 1.7
25 °Cb [kW/h]
a) The fans in the devices are temperature regulated.
b) Values are for information only. There may be other requirements depending on the system, region
and installation location.
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Operating manual
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Auxiliary power supply
02.10.2009
a) At DC and AC rated voltage without including the auxiliary power supply.#
Depending on the revision status of the inverter in question, the values may differ from those
specified here.
Specifications
AC output data
a
Mains voltage range [V]
VC WL 280
VC WL 300
457–322
457–322
310–218
400
400
270
Maximum output current [A]
145
361
577
Rated power [kW]
100
250
270
Maximum output power [kW]
100
250
270
Rated frequency [Hz]
50 (60)
50 (60)
50 (60)
Frequency range [Hz]
47–52
(57–61)
47–52
(57–61)
47–52
(57–61)
Required grid configuration
All TN
All TN
IT network
networks, TT networks, TT
network
network
Distortion factor
<2%
<2%
ENGLISH
Rated mains voltage [V]
a
VC WL 110
<3%
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a) Voltage between phases; the measurement in the device is between phase and neutral
Voltwerk VC WL series EU model
Operating manual
87
Efficiency curves with various input voltages
ENGLISH
Efficiency curves with various input voltages1
Voltwerk VC WL 110
98,00%
96,00%
94,00%
92,00%
(1)
90,00%
(2)
88,00%
(3)
86,00%
0%
9.1:
20%
30%
40%
50%
60%
70%
80%
90%
100%
Efficiency level measured against percent of rated AC capacity
Voltwerk VC WL 110: U = 540
Voltwerk VC WL 110: U = 635
Voltwerk VC WL 110: U = 700
VDC
VDC
VDC
1)
Depending on the revision status of the inverter in question, the efficiency levels may differ from those specified here.
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Operating manual
Voltwerk VC WL series EU model
DO_BA_2009_1ENG_DVo
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(1)
(2)
(3)
10%
Efficiency curves with various input voltages
Voltwerk VC WL 280
98,00%
ENGLISH
97,00%
96,00%
95,00%
94,00%
(1)
93,00%
92,00%
91,00%
(2)
90,00%
(3)
89,00%
0%
9.2:
(1)
(2)
(3)
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Efficiency level measured against percent of rated AC capacity
Voltwerk VC WL 280: U = 540 VDC
Voltwerk VC WL 280: U = 640 VDC
Voltwerk VC WL 280: U = 700 VDC
Voltwerk VC WL 300
100,00%
99,00%
98,00%
97,00%
96,00%
95,00%
DO_BA_2009_1ENG_DVo
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94,00%
93,00%
(1)
(2)
(3)
92,00%
0%
9.3:
(1)
(2)
(3)
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Efficiency level measured against percent of rated AC capacity
Voltwerk VC WL 300: U = 540 VDC
Voltwerk VC WL 300: U = 640 VDC
Voltwerk VC WL 300: U = 740 VDC
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Operating manual
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