Download ASCO 7000 SERIES MVATS GB IEC Suggested Specifications

SUGGESTED SPECIFICATION
For
Automatic Transfer Switches
PART 1 - GENERAL
1.01 Scope
Furnish and install automatic transfer switches (ATS) with 3 poles, amperage, voltage, and
withstand ratings as shown on the plans. Each automatic transfer scheme shall consist of a
medium voltage circuit breaker transfer pair and a microprocessor controller to provide automatic
operation.
1.02 Codes and Standards
The automatic transfer switchgear shall conform to the requirements of:
A. IEC62271-200 – AC Metal Enclosed Switchgear and Control Gear for rated voltages above
1kV and up to 52kV
B. IEC 60694 – Common Specification for High Voltage Switchgear and Control Gear
C. IEC 62271-100 High Voltage alternating current circuit breakers
D. IEC 60529 Degrees of protection provided by enclosures (IP Codes)
E. GB3906-2006 Alternating-current metal-enclosed switchgear and controlgear for rated
voltages above 3.6kV and up to and including 40.5kV
1.03 Acceptable Manufacturers
Automatic transfer switches shall be ASCO 7000 Series. Any alternate shall be submitted for
approval to the consulting engineer at least 10 days prior to bid. Alternate bids must list any
deviations from this specification.
The equipment to be supplied shall provide the highest reliability and the greatest ease of
maintenance.
The manufacturer shall have experience in the design, building, testing and service of this type
equipment and be able to document their qualifications. Only suppliers with the ability and
experience to provide this type of system shall be acceptable.
1.04 Ratings
The rating of the transfer system shall be 12 kilo Volts, 2500 A, 31.5 kA Short Circuit Rating
1.05 Documentation
A. Submittals for approval shall include the following:
a. Outline drawing showing conduit entry areas and anchoring information.
b. Sequence of operation.
c. One Line Drawing
B. Operation and maintenance manuals shall be supplied when the equipment is shipped. A
quantity of four (4) shall be required. The manuals shall contain:
a. Sequence of Operation
b. Installation Instructions
c. Maintenance Instructions
d. Material Summary
e. Complete Drawings
f. Component Instructions
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g. Spare Parts Information
1.06 Testing
The equipment shall be factory tested to simulate a complete and integrated system. The circuit
breakers supplied shall be installed in their actual positions and electrically and mechanically
tested. A narrative of the system operation shall be provided and shall be utilized when testing the
equipment. Copies of the test reports shall be submitted to the engineer.
1.07 Warranty – See separate Warranty Document.
PART 2 – PRODUCTS
2.01 Mechanically Held Transfer Switch
A. The transfer switch shall consist of two electrically operated medium voltage circuit
breakers and be mechanically held. The switch shall not be electrically interlocked if Closed
Transition operation is desired.
B. All standard door-mounted switches and pilot lights shall be 16-mm industrial grade type or
equivalent for easy viewing & replacement. Standard Automatic Transfer Switch Door
controls shall be provided.
C. The switch shall be positively locked and unaffected by momentary outages, so that contact
pressure is maintained at a constant value and contact temperature rise is minimized for
maximum reliability and operating life.
D. Structure
a. All equipment bases shall be fabricated with an adequate number of anchor bolt
holes designed to put the base in direct contact with the concrete pad when bolted.
b. All doors shall be pan type and be provided with sufficient hinges and stiffeners to
support the door and components for an absolute minimum deflection and wobbling
when opening or closing. Doors must operate more than 90 degrees.
E. Layout - All equipment shall be arranged in a logical manner to facilitate ease of operation
and maintenance of the equipment.
F. Paint - The complete assembly shall be thoroughly cleaned and treated prior to painting.
The unit shall be painted light gray with paint suitable for indoor locations.
G. Bus - Main bus shall be rated 2500 amps and shall be fabricated from copper. .
H. Locks - Front doors shall be supplied with a lockable handle. All door locks shall be keyed
alike to operate from a single key and one key shall be supplied for each lock
2.02 Microprocessor Controller
A. The controller's sensing and logic shall be provided by a single built-in microprocessor for
maximum reliability, minimum maintenance, and the ability to communicate serially through
an optional serial communication module.
B. Voltage sensing shall be true RMS type and shall be accurate to 1% of nominal voltage.
Frequency sensing shall be accurate to 0.2%. The panel shall be capable of operating
over a temperature range of -20 to +60 degrees C and storage from -55 to +85 degrees C.
C. The controller shall be connected to the transfer switch by an interconnecting wiring
harness. The harness shall include a keyed disconnect plug to enable the controller to be
disconnected from the transfer switch for routine maintenance. Sensing and control logic
shall be provided on multi-layer printed circuit boards. Interfacing relays shall be industrial
grade plug-in type with dust covers. The panel shall be enclosed with a protective cover
and be mounted separately from the transfer switch unit for safety and ease of
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maintenance. The protective cover shall include a built-in pocket for storage of the
operator’s manuals.
D. All customer connections shall be wired to a common terminal block to simplify field-wiring
connections.
E. The controller shall meet or exceed the requirements for Electromagnetic Compatibility
(EMC) as follows:
a. EN 55011:1991 Emission standard - Group 1, Class A
b. EN 50082-2:1995 Generic immunity standard, from which:
c. EN 61000-4-2:1995 Electrostatic discharge (ESD) immunity
d. ENV 50140:1993 Radiated Electro-Magnetic field immunity
e. EN 61000-4-4:1995 Electrical fast transient (EFT) immunity
f. EN 61000-4-5:1995 Surge transient immunity
g. EN 61000-4-6:1996 Conducted Radio-Frequency field immunity
PART 3 - OPERATION
3.01 Sequence of Operation
A. When the normal side voltage drops to a preset value (adjustable from 70% to 98%), the
phase sensing relay(s) open and from the transfer control panel, after a one second delay
(adjustable from 0 to 6 sec.), a signal is sent to start the engine generator.
B. When the engine generator reaches 90% of the rated voltage (adjustable from 85% to
100%) and 95% of rated frequency (adjustable from 90% to 100%), the normal side breaker
is tripped open. Immediately the emergency side breaker is closed (adjustable time delay 0
to 1 minute supplied standard, set at 0). The transfer switch load is now connected to the
emergency source.
C. When normal source voltage is restored to 90% of rated value, the normal side phase
sensing relays pick up (adjustable from 85% to 100%). After an adjustable time delay (0 to
60 minutes), the transfer control panel directs the emergency side breaker to open and
immediately after that the normal side breaker closes.
D. At the moment of retransfer to normal source, an adjustable time delay (0 to 60 minutes)
initiates, and after cool down timing period, the engine is stopped.
3.01 Controller Display and Keypad
A. A four line, 20 character LCD display and keypad shall be an integral part of the controller
for viewing all available data and setting desired operational parameters. Operational
parameters shall also be available for viewing and limited control through the serial
communications input port. The following parameters shall only be adjustable via DIP
switches on the controller:
a. Nominal line voltage and frequency
b. Single or three phase sensing
c. Operating parameter protection
d. Transfer operating mode configuration
e. (Open transition, Closed transition, or Delayed transition)
B. All instructions and controller settings shall be easily accessible, readable and
accomplished without the use of codes, calculations, or instruction manuals.
3.02 Voltage, Frequency and Phase Rotation Sensing
A. Voltage and frequency on both the normal and emergency sources (as noted below) shall
be continuously monitored, with the following pickup, dropout, and trip setting capabilities
(values shown as % of nominal unless otherwise specified):
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B.
C.
D.
E.
F.
a. Undervoltage N&E, 3 Phase - 70 to 98% Dropout / Reset 85 to 100% of Dropout
b. Overvoltage N&E, 3 Phase -102 to 115% Dropout / Reset 2% below trip
c. Under frequency N&E - 85 to 98% / Reset 90 to 100% of trip
d. Over frequency N&E - 102 to 110% / Reset 2% below trip
e. Voltage unbalance N&E - 5 to 20% / Reset 1% below trip
Repetitive accuracy of all settings shall be within ± 0.5% over an operating temperature
range of -20C to 60C.
Voltage and frequency settings shall be field adjustable in 1% increments either locally with
the display and keypad or remotely via serial communications port access.
The controller shall be capable (when activated by the keypad or through the serial port) of
sensing the phase rotation of both the normal and emergency sources. The source shall be
considered unacceptable if the phase rotation is not the preferred rotation selected (ABC or
CBA).
Source status screens shall be provided for both normal & emergency to provide digital
readout of voltage on all 3 phases, frequency, and phase rotation.
The controller shall include a user selectable algorithm to prevent repeated transfer cycling
to a source on an installation which experiences primary side, single phase failures on a
Grounded Wye – Grounded Wye transformer which regenerates voltage when unloaded.
The algorithm shall also inhibit retransfer to the normal (utility) source upon detection of a
single phasing condition until a dedicated timer expires, the alternate source fails, or the
normal source fails completely and is restored during this time delay period. The time
delays associated with this feature shall be adjustable by the user through the controller
keypad and LCD.
3.03 Time Delays
A. An adjustable time delay of 0 to 6 seconds shall be provided to override momentary normal
source outages and delay all transfer and engine starting signals. Capability shall be
provided to extend this time delay to 60 minutes by providing an external 24 VDC power
supply.
B. A time delay shall be provided on transfer to emergency, adjustable from 0 to 60 minutes,
for controlled timing of transfer of loads to emergency.
C. Two time delay modes (which are independently adjustable) shall be provided on retransfer to normal. One time delay shall be for actual normal power failures and the other
for the test mode function. The time delays shall be adjustable from 0 to 60 minutes. Time
delay shall be automatically bypassed if the emergency source fails and the normal source
is acceptable.
D. A time delay shall be provided on shut down of engine generator for cool down, adjustable
from 0 to 60 minutes.
E. A time delay activated output signal shall also be provided to drive an external relay(s) for
selective load disconnect control. The controller shall have the ability to activate an
adjustable 0 to 5 minute time delay in any of the following modes:
a. Prior to transfer only.
b. Prior to and after transfer.
c. Normal to emergency only.
d. Emergency to normal only.
e. Normal to emergency and emergency to normal.
f. All transfer conditions or only when both sources are available.
F. The controller shall also include the following built-in time delays for optional Closed
Transition and Delayed Transition operation:
a. 1 to 5 minute time delay on failure to synchronize normal and emergency sources
prior to closed transition transfer.
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b. 0.1to 9.99 second time delay on an extended parallel condition of both power
sources during closed transition operation.
c. 0 to 5 minute time delay for the load disconnect position for delayed transition
operation.
G. All time delays shall be adjustable in 1 second increments, except the extended parallel
time, which shall be adjustable in .01 second increments.
H. All time delays shall be adjustable by using the LCD display and keypad or with a remote
device connected to the serial communications port.
3.04 Additional Features
A. A three position momentary-type test switch shall be provided for the test / automatic /
reset modes. The test position will simulate a normal source failure. The reset position shall
bypass the time delays on either transfer to emergency or retransfer to normal.
B. A SPDT contact, rated 5 amps at 30 VDC, shall be provided for a low-voltage engine start
signal. The start signal shall prevent dry cranking of the engine by requiring the generator
set to reach proper output, and run for the duration of the cool down setting, regardless of
whether the normal source restores before the load is transferred.
C. Auxiliary contacts, rated 10 amps, 250 VAC shall be provided consisting of one contact,
closed when the ATS is connected to the normal source and one contact closed, when the
ATS is connected to the emergency source.
D. LED indicating lights (16 mm industrial grade, type 12) shall be provided; one to indicate
when the ATS is connected to the normal source (green) and on to indicate when the ATS
is connected to the emergency source (red).
E. LED indicating lights (16 mm industrial grade, type 12) shall be provided and energized by
controller outputs. The lights shall provide true source availability of the normal and
emergency sources, as determined by the voltage sensing trip and reset settings for each
source.
F. Two-pole double throw contacts that operate when: (1) emergency source voltage is
present at transfer switch terminals equivalent to ASCO accessory 18B and; (2) normal
source voltage is present at transfer switch terminals. This feature shall be equivalent to
ASCO accessory 18B & 18G.
G. Standard load-shedding circuit initiated by removal of customer supplied control voltage as
specified by user. This feature shall be equivalent to ASCO accessory 30B
H. Selective load disconnect control contacts (two provided) which operate with time delay
prior to and/or after load transfer and retransfer. The feature shall be equivalent to ASCO
31Z.
The following features shall be built-in to the controller, but capable of being activated
through keypad programming or the serial port only when required by the user:
Provide the ability to select “commit/no commit to transfer” to determine whether the load
should be transferred to the emergency generator if the normal source restores before the
generator is ready to accept the load.
J. The controller shall be capable of accepting a normally open contact that will allow the
transfer switch to function in a non-automatic mode using an external control device.
K. Engine Exerciser - The controller shall provide an internal engine exerciser. The engine
exerciser shall allow the user to program up to seven different exercise routines. For each
routine, the user shall be able to:
a. Enable or disable the routine.
b. Enable or disable transfer of the load during routine.
c. Set the start time, .
I.
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i. time of day
ii. day of week
iii. week of month (1st, 2nd, 3rd, 4th, alternate or every)
d. Set the duration of the run. At the end of the specified duration the switch shall
transfer the load back to normal and run the generator for the specified cool down
period. A 10-year life battery that supplies power to the real time clock in the event
of a power loss will maintain all time and date information.
The following feature shall be built - into the controller, but capable of being activated
through keypad programming or the communications interface port. Note: The transfer
switch will operate in a non-automatic mode with this feature activated.
L. Terminals shall be provided for a remote contact which opens to signal the ATS to transfer
to emergency and for remote contacts which open to inhibit transfer to emergency and/or
retransfer to normal. Both of these inhibit signals can be activated through the keypad or
serial port.
M. System Status - The controller LCD display shall include a “System Status” screen which
shall be readily accessible from any point in the menu by depressing the “ESC” key a
maximum of two times. This screen shall display a clear description of the active operating
sequence and switch position. For example,
Normal Failed
Load on Normal
TD Normal to Emerg
2min15s
Controllers that require multiple screens to determine system status or display “coded”
system status messages, which must be explained by references in the operator’s manual,
are not permissible.
N. Self-Diagnostics - The controller shall contain a diagnostic screen for the purpose of
detecting system errors. This screen shall provide information on the status input signals to
the controller which may be preventing load transfer commands from being completed.
O. Communications Interface – The controller shall be capable of interfacing, through an
optional serial communication module, with a network of transfer switches, locally (up to
4000 ft.) or remotely through modem serial communications. Standard software specific for
transfer switch applications shall be available by the transfer switch manufacturer. This
software shall allow for the monitoring, control and setup of parameters.
P. Data Logging – The controller shall have the ability to log data and to maintain the last 99
events, even in the event of total power loss. The following events shall be time and date
stamped and maintained in a nonvolatile memory:
a. Event Logging
i. Data and time and reason for transfer normal to emergency.
ii. Data and time and reason for transfer emergency to normal.
iii. Data and time and reason for engine start.
iv. Data and time engine stopped.
v. Data and time emergency source available.
vi. Data and time emergency source not available.
b. Statistical Data
i. Total number of transfers.
ii. Total number of transfers due to source failure.
iii. Total number of days controller is energized.
iv. Total number of hours both normal and emergency sources are available.
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Q. Optional Communications Module - A full duplex RS485 and/or Ethernet interface shall
be installed in the ATS controller to enable serial or Ethernet communications. The
communications module shall be capable of a direct connect or multi-drop configured
network. This module shall allow for the seamless integration of existing or new
communication transfer devices. The serial communication interface shall be equal to
ASCO Accessory 72EE2.
R. External DC Power Supply – An optional provision shall be available to connect an
external 24 VDC power supply to allow the Control Panel and indicators to function when
both power sources are dead. This option shall be equivalent to ASCO accessory 1G.
Part 4 - Switchgear Description
4.1 Switchgear Type
The offered switchgear is an air-insulated, type-tested, metal-enclosed and metal-clad medium
voltage switchgear for indoor installation. This switchgear complies with IEC 62271-200 and
therefore fulfils the following classifications:
Loss of service continuity category: LSC 2B (metallic partition, i.e. separate partitions for
busbar, switching device and connection compartments)
Partition class PM (metallic partition)
Internal arc classification: IAC A FLR
4.2 Panel Design in Modular Construction, Partitions
A switchgear panel consists of the following compartments:
 Busbar compartment
 Switching device compartment
 Connection compartment
 Low-voltage compartment
The individual sheet-steel compartments are bolted together to one switchgear panel.
Separation walls to the adjacent panels are always double. Doors and lateral switchgear end
walls are powder-coated with resistant epoxy resin, all other walls are galvanized.
The complete enclosure and the partitions between the individual compartments and covers
are metallic and earthed. This guarantees the highest possible service continuity category LSC
2B of the switchgear (metal-clad design) and the highest possible personal safety with partition
class PM according to IEC 62271-200.
The loss of service continuity category LSC 2B allows access to compartments while other
adjacent compartments remain in operation. For example, it is possible to maintain the
connection compartment or switching device compartment of one panel, without de-energizing
all other compartments of the adjacent panels including the busbar. In this way, the category
LSC 2B provides the highest possible service continuity.
The individual compartments are pressure-resistant, so that - in case of an internal fault (arc
fault) no burn through of partitions and no re-ignition in adjacent compartments occur.
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In case of an arc fault, pressure is generally relieved upwards in all three compartments. The
switchgear is tested for resistance to internal faults according to IEC 62271-200 and fulfills all
criteria of the internal arc classification IAC A FLR according to IEC 62271-200. It is therefore
adequate for universal installation and access from all sides.
The partition class PM ensures that only earthed steel sheets can be touched during access to
the individual compartments. This guarantees the highest possible personal safety during
maintenance work.
4.3 Busbar compartment
The busbar compartment contains the three-phase busbars made of round-edge standard
profile copper, the panel bars and the bushing-type insulators with the fixed contacts. The
shutter for visual inspection of the fixed contacts can be opened and closed individually in the
switching device compartment. Busbars are bolted from panel to panel.
Accessibility of busbar is possible after removing of partitions. In this way, access to the busbar
compartment is “tool-based” according to IEC 62271-200.
Possible additional components (voltage transformers, earthing switch, and bus riser) are
mounted in a separate additional compartment.
4.4 Switching Device Compartment
The switching-device compartment can be equipped with the following devices:
 Vacuum circuit-breaker withdrawable
 Disconnecting link withdrawable
 Metering device withdrawable.
It is mandatory that the mechanical position indicators and control elements of the respective
switching devices are visibly integrated in a mimic diagram in the door of the switching device
compartment. In connection with the logical mechanical interlocking system.
While racking from the service to the test position or vice versa, the withdrawable part opens or
closes the metal shutters (positively driven) covering the fixed contacts in the connection and
busbar compartments.
The connection of the low-voltage wiring between the withdrawable part and the fixed part of
the panel is done via a 64-pole plug connection.
Generally, the low-voltage wiring is laid in metallic ducts with removable covers.
In connection with the door interlock, access to the switching device compartment is “interlockbased” according to IEC 62271-200.
The application of maintenance-free vacuum circuit-breakers reduces the maintenance and
shutdown times. In comparison with other switching technologies, this increases the switchgear
availability and reduces the maintenance costs. Using the vacuum technology as quenching
medium, arc quenching in the circuit-breaker does not produce any highly toxic decomposition
products.
4.5 Interlocks
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Following interlocking conditions specified according to IEC 62271-200 / VDE 0671-200 are
fulfilled:




Feeder earthing switch can only be operated with switching device in disconnected
position
Switching device can only be racked on the movable part with the associated switching
device in OPEN position and with feeder earthing switch OPEN
Switching device can only be operated in interlocked disconnected or service position
Switching of switching device in ON position only possible with plugged low voltage
Connection
Beyond the specification of standards:
 Moving of withdrawable part only possible with closed high voltage door
 Coding prevents insertion of switching device with a lower rated normal current into
panels with higher rated normal current
 optionally electromagnetic interlocks, mechanical key interlocking systems or padlocks
Operator safety is guaranteed by the above mentioned interlocks and operations
The circuit-breaker and make-proof earthing switch are type-tested in the panel according to
IEC 62271-200.
4.6 Connection Compartment
The connection compartment can contain the following components:







Cable sealing ends resp. bar connection
Current transformers or bushing type insulators
Make-proof earthing switch
Voltage transformers
Surge arresters or limiters
Earthing busbar
Zero-sequence current transformers
The shutter for visual inspection of the fixed contacts can be opened and closed individually in
the switching device compartment.
The lower partition is bolted and offers access to the connection compartment from the front
during installation.
Cable connection is optionally possible from the front or the rear. With cable connection from
the front, the connection compartment is an “interlock-based and tool-based accessible
compartment” according to IEC 62271-200. With cable connection from the rear, access is
“tool-based”.
Cable testing equipment respectively cable testing adapters can be easily connected without
detaching the cables. For this purpose, the shutters can be opened and locked separately.
To guarantee personal safety, the shutters of the busbar compartment are optionally equipped
with a padlock.
4.7 Low-Voltage Compartment
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The low-voltage compartment is located at the front. It is completely partitioned off the rest of
the panel and can be removed from the panel.
Electrical connections between the withdrawable part and the fixed part of the panel are
performed with flexible wires and a 64-pole low-voltage plug connection.
Current transformer leads are wired to terminals in the low-voltage compartment. All other
panel-internal circuits are wired to 10-pole connectors and plugged in the low-voltage
compartment.
Bus wires are laid from panel to panel in the upper part of the low-voltage compartment and are
pluggable.
Secondary devices are installed in the door of the low-voltage compartment and on a mounting
plate with a top-hat rail system. The wires are laid in wiring ducts with a sufficient cross-section.
Part 5 - Standards
IEC-Standards
GB3906-2006
Name
Alternating-current. metal-enclosed switchgear and controlgear
for rated voltages above 3.6 kV and up to and including 52 kV
IEC 62271-200
A.C. metal-enclosed switchgear and controlgear for rated
voltages above 1 kV and up to and including 52 kV
IEC 62271-1
Common clauses for high-voltage switchgear and controlgear
standards
IEC 62271-100
High-voltage alternating current circuit-breakers
IEC 60529
Degree of protection provided by enclosures (IP-code)
IEC 62271-102
High-voltage alternating current disconnectors and earthing
switches
IEC 62 271-105
High-voltage alternating current switch-fuse Combinations
IEC 60 071 - 1
Insulation co-ordination for equipment in three-phase systems
above 1 kV
IEC 60 282 - 1
Current limiting fuses
IEC 61 243-5
Working under voltage - Voltage detectors – Part 5: Voltage
detection systems
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Part 6 - Switchgear Data
Installation........................................................................................................................Indoor
Number of phases ................................................................................................................... 3
Busbar system..................................................................................................... Single busbar
Rated voltage...................................................................................................................12 kV
Operating voltage .......................................................................................................... 10 kV
Rated frequency ...........................................................................................................50/60 Hz
System neutral earthing................................................................ Isolated or resonant-earthed
Rated short-duration power-freq. withstand voltage .........................................................20 kV
Rated lightning impulse withstand voltage ........................................................................60 kV
Ambient air temperature ................................................................................................... 40 °C
Rated normal current of busbar......................................................................................2500 A
Max permissible busbar current at 40 °C........................................................Same as Above A
Busbar insulation .................................................................................................................with
Bus bar transverse partition............................................................................................without
Rated short-time withstand current................................................................................ 31.5 kA
Rated duration of short-circuit............................................................................................... 4 s
Rated peak withstand current ...........................................................................................80 kA
Rated short-circuit breaking current............................................................................... 31.5 kA
Rated short-circuit making current.....................................................................................80 kA
Degree of protection for enclosure .................................................................................... IP4X
Degree of protection for partitions ..................................................................................... IP2X
Loss of service continuity category.................................................................................LSC2B
Partition class .......................................................................................................................PM
Internal arc classification ..................................................................................................... IAC
Type of accessibility front / lateral / rear ..........................................................................A FLR
Type of Installation.................................................................................................Wallstanding
Internal arc fault current.................................................................................................31.5 kA
Arc-fault duration ............................................................................................................... 1,0 s
Cable access from ............................................front (wallstanding) or front/rear (freestanding)
Panel width .............................................................................................................see drawing
Panel depth.............................................................................................................see drawing
Panel height................................................................................................................ 2300 mm
Height of switchgear room ( min. ).............................................................................. 2800 mm
Type of packing Seaworthy crate for 6 months transport and storage
Acceptance test No Factory acceptance test included.
Color of switchgear....................................................................................................RAL 7035
Other details as per scope of supply, single-line diagram and/or constructional data.
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Part 7 - Scope of Supply
The switchgear is designed as single-busbar switchgear.
In case of customer-specific designs, some points of the switchgear description might not be
valid anymore. The offered scope of supply is listed in detail as follows:
Qty
Description
2
1
1 Lot
Switching device panel 2500 A - Maximum permissible current at 40°C: 2500 A
Busbar connection panel 2500 A
Switchgear accessories
7.1. Switching device panel
7.1.1. Busbar Compartment - Busbar cross-section Cu 1x100x10 mm,
Insulated.
7.1.2. Switching Device Compartment - Circuit Breaker withdrawable part
7.1.2.1.
Operating mechanism withdrawable part: Hand operated
7.1.2.2.
Auxiliary switch withdrawable part: 4 NC + 4 NO
7.1.2.3.
Electromagnetic interlocking: DC 220 V
7.1.2.4.
Mechanical padlocking
7.1.2.5.
Vacuum circuit breaker
7.1.2.6.
Technical data: 12.0 kV / 31.5 kA / 2500 A
7.1.2.7.
Operating mechanism circuit breaker: motor
7.1.2.8.
Voltage of motor operating mechanism: DC 220 V
7.1.2.9.
Voltage of closing solenoid: DC220 V
7.1.2.10. One shunt release
7.1.2.11. Voltage 1st tripping coil: DC 220 V
7.1.2.12. Auxiliary switch circuit breaker: 12 NC + 12 NO
7.1.3. Connection Compartment
7.1.3.1.
Panel connection
7.1.3.1.1.
Cable connection from bottom
7.1.3.1.2.
2 cables per phase
7.1.3.1.3.
Single-core cable 300 to 500 mm2
7.1.3.2.
Capacitive voltage indicator on the connection side – N.A
7.1.3.3.
Earthing switch on the cable connection (Optional)
7.1.3.3.1.
Earthing switch with short-circuit making capability
7.1.3.3.2.
Short-circuit current and duration: 31.5 kA / 3s
7.1.3.3.3.
Auxiliary switch: 4 NO + 4 NC
7.1.3.3.4.
Operating mechanism: Hand operated
7.1.3.4.
Quantity (3) Voltage transformer on cable connection(Optional)
7.1.3.4.1.
Voltage transformer, fixed-mounted
7.1.3.4.2.
3 x 1-pole with earth-fault winding
7.1.3.4.3.
Primary voltage 12 / v3 kV
7.1.3.4.4.
Voltage of secondary winding 120 V / v3
7.1.3.4.5.
Rating and class of secondary winding 100 VA / Cl. 1
7.1.3.4.6.
Voltage of earth-fault winding 120 V / v3
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7.1.3.4.7.
Rating and class of earth-fault winding For damping, limit
current 6 A
7.1.3.5.
Quantity (3) Current transformers 2500:5 Ratio (Optional)
7.1.3.6.
Low Voltage Compartment - Height 630 mm
7.1.3.6.1.
Protective Relay (Optional)
7.2. Busbar connection panel
7.2.1. Busbar Compartment - Busbar cross-section Cu 1x100x10 mm, insulated
7.2.2. Switching Device Compartment – Empty
7.2.3. Connection Compartment
7.2.3.1.
Cable connection from bottom
7.2.3.2.
2 cables per phase
7.2.3.3.
Single-core cable 300 to 500 mm2
7.2.3.4.
Quantity (3) Current transformers - 2500:5 Ratio (Optional)
7.2.4. Low Voltage Compartment – Height 630 mm
7.2.4.1.
All ATS Controls
7.2.4.2.
Load Power Meter Accessory 135L (Optional)
7.3. Switchgear accessories
7.3.1. One Standard accessory set consisting of:
7.3.1.1.
1 hand crank for charging spring of circuit breaker
7.3.1.2.
1 Push rod for actuating the ON/OFF push buttons
7.3.1.3.
1 Hand lever for moving withdrawable part
7.3.1.4.
1 socket spanner for high voltage and low voltage door
7.3.1.5.
1 Installation manual and operation manual (in selected language)
7.3.2. Two end walls
7.3.3. 1 Hand lever for shutter mechanism
7.3.4. 1 Wall panel for accessories
7.3.5. 1 Tube of Vaseline (250 g) for connecting coppers
7.3.6. 1 Touch-up pen for minor paint damages, colour RAL7035
3/1/2015
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*Note Spec Writer: The following sections are optional and the section should be deleted if not
used.
5. OPTIONAL FEATURES
5.1 Optional Power Meter – Accessory 135L
A.
SCOPE - Provide a power metering device for collecting real-time power
system information.
The meter shall be plug and play with all ASCO
PowerQuest CPMS systems and support open protocols.
B.
CODES AND STANDARDS - The Power Meter shall conform to the
requirements of:
1. UL 3111-1 – Electrical Measuring and Testing Equipment
2. CAN/CSA-C22.2 No. 23-M89 – CSA Safety Requirements for Electrical
and Electronic Measuring and Test Equipment.
3/1/2015
C.
PRODUCT
1. The power meter shall be capable of operating without modification at a
nominal frequency of 45 to 66 Hz.
2. The Power Meter shall be rated for an operating temperature of -4° F to
158° F and a storage temperature of -22° F to 176° F. And shall be
rated for an 85% non-condensing, relative humidity.
3. The Power Meter shall accept inputs from industry standard instrument
transformers (120 VAC secondary PT’s and 5A secondary CT’s). Direct
phase voltage connections, 0 to 600VAC nominal, shall be possible
without the use of PT’s.
4. The Power Meter shall accept single, 3 phase, or three & four wire
circuits. A fourth CT input shall be available to measure neutral or
ground current. The Power Meter shall contain a built-in discrete contact
to wire an ATS 14A auxiliary contact to indicate switch position.
5. The Power meter shall accept AC voltage from the sensing lines for
operation. Additional provisions shall be provided for external DC
voltage input range 9-36VDC with a nominal of 24VDC.
6. The power meter shall be equipped with a continuous duty, long-life, 4
line x 20 character green backlit LCD.
7. All setup parameters required by the Power Meter shall be stored in nonvolatile memory and retained in the event of a control power interruption.
8. The Power Meter shall be flush mountable on a surface.
9. The power meter enclosure shall be sealed to IP-51 (NEMA 1) and the
faceplate shall be sealed to IP-65 (NEMA 4). All push buttons shall be
sealed tact switches.
D.
COMMUNICATION
1. The Power Meter shall send, when prompted, information to a central
location equipped with a manufacturer supplied critical power
management system or 3rd party monitor through manufacturer supplied
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communication modules. All 3rd party monitors must utilize industry
standard open protocols Modbus/RTU, Modbus/TCP or SNMP.
2. An embedded RS-485 port will be provided which will enable
communication at 9600, 19.2K, 38.4K or 57.6K baud. DIP switches will
be provided on the RS-485 port allowing a user to select 2-wire or 4-wire
communication as well as the option to activate a terminating resistor on
the port.
E.
OPERATION
1. NEC 220 Compliance - The meter shall help facilities comply with NEC
220. It shall provide Maximum Demand calculations for the past 24
months, as per standards with 15 minute averages.
Monitored and Calculated Data
The following data will be available on the display and Modbus registers
of the Power Meter:
Line-to-neutral voltages (VAN, VBN and VCN)
Line-to-neutral voltage average (VAVE)
Line-to-line voltages (VAB, VBC and VCA)
Line-to-line voltage average (VLAVE)
Current on each phase (IA, IB and IC)
Current on the neutral conductor(IN)
Average current(IAVE)
Active power, KW per phase and total (W A, W B, WC and WT)
Reactive power, KVAR per phase and total (VARA, VARB, VARC and
VART)
Apparent power, KVA per phase and total (VAA, VAB, VAC and VAT)
KW Hours importing, exporting and net (KWHIMP, KWHEXP, and KWHNET)
KVAR Hours leading, lagging and net (KVARHLEAD, KVARHLAG, and
KVARHNET)
Power factor (PF)
Signal frequency (Hz)
Digital Input
F.
3/1/2015
COMMUNICATIONS INTERFACE
1. Ethernet - The meter shall be plug and play via ACAN and TTL ports to a
72E (5150) to provide Ethernet capability.
2. Languages: The Power Meter shall offer an LCD which can display no
less than nine different languages.
3. Interface:
A. Displaying each of the metered values shall be done through the use
of menu scroll buttons. There will be an escape button which will be
used to take the user back to the previous page or to cancel a setting
change. Pressing escape no more than three times will return the
user to the home screen.
B. For ease of operator viewing, the display can be configured to remain
on continuously, with no detrimental effect on the life of the Power
Meter
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C. The display’s contrast shall be configurable in intervals of 10 %
(ranging 0%-100%).
D. Setup of system requirements shall be allowed from the front of the
Power Meter
5.2 PROTECTIVE RELAYS - Accessory 118FN (On Normal Side) & 118FE (On
Emergency Side)
A.
B.
C.
D.
E.
F.
Shall be NR NSR612RF-DS or XJ (is coming..) Feeder Protection System
Provides primary circuit protection on distribution networks at any voltage level
Three Phase & Ground Time Overcurrent
Phase & Ground Instantaneous overcurrent
IEC/BS142 Curves
RS 485 2-Wire Communication Standard
5.3 ASCO Communications Interface - Accessory 72EE2 Connectivity Module: For direct
interfacing with vendor’s Transfer Switches. Shall allow the vendor’s monitoring products to
monitor and control the transfer switch equipment with the implementation of 128-Bit AES
encryption standard. An embedded webpage shall be provided for switch status, metered
values and list of up to 99 events in the log. Modbus TCP and Simple Network
Management Protocol (SNMP) shall be shall be supported for open monitoring of ASCO
products. Hardware will include:
A.
B.
C.
D.
E.
3/1/2015
QTY (1) – 10/100 Mbps Ethernet port
QTY (1) – RS-485 port
QTY (1) – 24 VDC power input for optional usage
DIN Rail Mountable
Onboard Status LED’s shall be provided for the following:
a. Power
b. Transmitting Data
c. Receiving Data
d. Communication Failure
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