Download Insulation monitor - GMWISO 1.05

Insulation monitor - GMWISO 1.05
Insulation monitor - GMWISO 1.05
GTS GmbH & Co. KG, Ziegelfeldstraße 18, D - 73563 Mögglingen,
Telefon: +49 (0) 7174/89800-0, Telefax: +49 (0) 7174/89800-25
1
Insulation monitor - GMWISO 1.05
Copyright
No part of this Operation Manual may be reproduced, published or transmitted in
any form or by any means without the express permission of Generator-Technik
Schwäbisch Gmünd GmbH &Co. KG.
© 2001 Generator-Technik Schwäbisch Gmünd GmbH & Co. KG. All rights
reserved.
General information
Technical modifications after date of printing are not considered. Subject to
change without notice.
Issue date: August 2001
Manufacturer's address
For any information and support concerning technical problems, services and
orders please contact us.
Generator-Technik Schwäbisch Gmünd GmbH & Co. KG
Ziegelfeldstraße 18
D-73563 Mögglingen
Telefon +49 7174 89 80 0 0
Telefax +49 7174 89 80 0 25
www.gts-generator.com
[email protected]
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GTS GmbH & Co. KG, Ziegelfeldstraße 18, D - 73563 Mögglingen,
Telefon: +49 (0) 7174/89800-0, Telefax: +49 (0) 7174/89800-25
Insulation monitor - GMWISO 1.05
Conception
GMWISO insulation monitors are insulation monitoring modules taking especially into
account the increased safety need and the current regulations for portable,
combustion?engined stand?by electricpower units.
Ungrounded, portable stand-by electric-power units with the optimum system of
protection "Fuse disconneetion with insulation monitoring and cut-off" realised with
the GMWISO insulation monitor may also be commissioned by non-electricians and
be operated in areas with an increased threat to persons (for ex. damp areas).
Several consumers may be connected to the stand-by electric-power generator at
the same time. A "built" and measured grounding device is not necessary. Extensive
electricity distribution supply networks are admissible.
GMWISO insulation monitors have been developed especially for the difficult
operating conditions in the case of direct mounting to portable stand-by electricpower generators.
GMWISO insulation monitors can be supplied as individual modules for OEMs to be
integrated into newly-designed electric-power generators and as retrofitting kit for
generators already available on the market.
Product description
The GMWISO insulation monitors serve for the insulation monitoring in ungrounded
A.C. networks (as well as chained threephase networks in star connection) of
portable stand?by electric-power generators. With GMWISO insulation monitors, it is
easy to generate electric-power generators according to regulations (for ex.
GW308, VDE1) 0100.728) with little time needed for assembly and wiring.
The distribution supply network of the stand-by electric-power generator may
include pure A.C. consumers as well as non-electrically separated, D.C. fed devices
(for ex. frequency converter, threephase to single-phase rotary welding converter,
D.C. operated solenoid valves and brakes etc.). Spurious releases due to devices
with D.C. components connected to the generator are largely impossible because of
the new circuit technology with automatic sign-dependant sensitivity adaptation. It
must, however, be taken into account that faulty insulation on the D.C. side can
lead to a release, but with diverging sensitivity. The threshold value indicated for
the devices for faulty insulation is valid for faults in the A.C. network. In the
Technical Data of the GMWISO insulation monitors you flind a typical threshold value
indicated for a faulty insulation on the D.C. side of the connected devices. The
indications are valid for the D.C. circuits used mostly.
Regarding the threshold value and the behaviour during switch-off time GMWISO
insulation monitors have been matched with the valid regulations and are fail-safe.
The stand-by electric-power units must be built according to DIN 6280, part 10, and
on the altemator side laid out according to VDE 0530. They must be laid out and
tested for the network structure (IT network) provided for in VDE 0100, part 728/
4.2.2. with the method 4.2.4.2.1.
1)
*VDE = German Electric Engineers Regulations
GTS GmbH & Co. KG, Ziegelfeldstraße 18, D - 73563 Mögglingen,
Telefon: +49 (0) 7174/89800-0, Telefax: +49 (0) 7174/89800-25
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Insulation monitor - GMWISO 1.05
The devices GMWISO insulation monitor have been realised in SMD technology,
without transforrners or relays. They have been encapsulated entirely in a fully
insulated, moisture-proof housing, resistant to vibration and therefore also suitable
for a direct mounting to generators with diesel engines. GMWISO insulation
monitors can be used with an extended, admissible distribution voltage range /
frequency range (with respect to VDE 0413.2/1.73) and in a temperature range
which is practical for generators.
The distribution voltage of the GMWISO insulation monitor is drawn directly from
the output voltage of the generator's network to be monitored. A D.C. voltage is
used as measuring voltage, which constantly measures the insulating resistance
between the altemator output circuit/load circuit and PE. When the set threshold
value for the insulating resistance has been reached (or the value gets below the
threshold value), the extemal load current release/remote release of the load
circuit switch is triggered. lf the insulating resistance of all active components has
deereased below 100 Ω/V (i.e. 23 kΩ LI, N/PE) with respect to the equipotential
bonding conductor (PE) or (with an existing grounding) with respect to the earth
potential (:), all consumers are switched off immediately.
A signal lamp connected in parallel to the load current release displays the insulating
error (error display memory) until the GMWISO insulation monitor is reset. In order
to reset the GMWISO insulation monitor when an insulating error has occurred or
when the test button has been pressed, switch off the distribution voltage for at
least 2 seconds (for example by stopping the stand-by electricpower intemal
combustion engine).
Safety information
The function and reliability of the safety measure "Fuse disconnection with
insulation monitoring and all-polo cut-off" is particularly important for personal
protection and stand-by electric-power generators in the case of a rushed operation
by "non electricians".
Therefore the compliance with the following safety information is very irnportant.
− For the equipment with or retrofitting of GMWISO insulation monitors only
generators which meet the relevant rules (particularly DIN/VDE 0100, part 728,
DIN/VDE 0530, DIN 6280, part 10) are suitable.
− Generators with a high system of protection (at least IP 44) are to be preferred,
because they cause less problems due to reduced insulating values
(contamination, humidity in the machine). The minimum requirement for the
system of protection for generators according to DIN 6280, part 10 is the
reliable compliance with the system of protection IP 23 according to DIN
40050.
− If commercial stand-by electric-power generators or generators already in
operation are to be retrofit with GMWISO insulation monitors, the insulating
resistance/electric strength of the output winding(s) must be measured before
the GMWISO insulation monitor is installed. Only if the measured insulating values
($5 MΩ-:/Umeas= 500 V DC) and the electric strength (UM= 2500 V/50 Hz-:)
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GTS GmbH & Co. KG, Ziegelfeldstraße 18, D - 73563 Mögglingen,
Telefon: +49 (0) 7174/89800-0, Telefax: +49 (0) 7174/89800-25
Insulation monitor - GMWISO 1.05
according to DIN 62 80T.10§5.7.1.1 are met the generator is suitable for
retrofitting.
− GMWISO insulation monitors have been conceived for altemators with a largely
sinusoidal output voltage. lf altemators with a high relative harmonic content
or very asymmetric courses of the curves are used, an influence on the
response level is possible. In such cases the usability must be checked before
the use.
− Altemators with speeial voltages or special frequencies cannot be equipped with
GMWISO insulation monitors. See also "Technical Data GMWISO 1.05".
− lf the altemator has got several electrically separated output windings, for each
output circuit an individual insulation monitoring must be carried out. It is usually
not allowed to use combined welding electric power generators with nonelectrically separated welding winding or generators with load winding tap within
the scope of the VDE rules.
− The installation, the ftmctional test and the first commissioning of stand-by
electric-power generators retrofit with GMWISO insulation monitors may only be
carried out by an electrician.
− GMWISO insulation monitors must be installed carefully (particular attention must
be paid to abrasion when the connecting lines are installed) and the correct
connection must be tested before the commissioning. A wrong connection may
lead to the destruction of the GMWISO insulation monitor!
− The functional test during the first commissioning should be carried out with an
extemal test resistance (Rtest = 22 kΩ/tol.: ± 5 %/at least 5W). For this all live
connections of all sockets (including a possible neutral wire) must be connected
briefly − one after the other − with the PE via the resistance. In all cases the
cut-off must be effected after max. 1 s.
− In connection with GMWISO insulation monitors it is only allowed to use load
current releases remote releases approved by GMW.
− Only VDE tested devices with approval for a direct connection to the stand-by
electric-power generator network are admissible for the extemal test button
and signal lamp. When selecting these components, for the accommodation of
the components and regarding the power switch, the system of protection
required for the switch box of the generator must be complied with. Only
signal lamps which are resistant to vibration (glow lamp or LED) should be
used.
− Before the stand-by electric-power generator is handed over to the client, he
must be informed about the particular features and the operation of the
generator with the system of protection "potential segregation with insulation
monitoring and cut-off".
− The supplied test protocol must be handed over to the client of the stand-by
electric-power generator (completely filled in) together with the brief operator's
guide, as a supplement to the Operator's Guide.
GTS GmbH & Co. KG, Ziegelfeldstraße 18, D - 73563 Mögglingen,
Telefon: +49 (0) 7174/89800-0, Telefax: +49 (0) 7174/89800-25
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Insulation monitor - GMWISO 1.05
− Before insulation or voltage tests are carried out at the stand-by electric-power
generators (for example in the case of high-voltage tests/earth contact tests) or
at parts of the installation, the GMWISO insulation monitor must be separated
from the generator and all parts of the installation for the duration of the test.
− In each electrically connected distribution system only one insulation monitor may
be connected (i. e. in the case of an insulation monitoring with GMWISO
insulation monitor at the generator, socalled "Solid-rubber distributors" or similar
with insulation monitor are not admissible!) because insulation monitors can have
an influence on each other.
− It is possible to connect D.C. powered devices (solenoid valves, brakes,
converters etc.) in the network of the stand-by electric-power generator to be
monitored. It must be taken into account, however, that faulty insulation in the
D.C. circuit is registered with an increased sensitivity in both current directions.
− Distributions and devices with built-in residual current operated devices are not
fail-safe with ungrounded, portable stand-by electric-power generators (due to
the missing grounding installation/potential segregation), but they are not
necessary when the system of protection "potential segregation with insulation
monitoring and cut-off" is used.
− If the GMWISO insulation monitor is used within the scope of GW308 a brief
operator's guide for the insulation monitoring must be attached at the stand-by
electric-power generator pointing out the daily functional test.
− Further inforination and regulations for the use of generators with the system of
protection "Fuse disconnection with insulation monitoring and cut-off" can be
found in VDE 0 100, part 728 and GW 308.
− Additional provisions or regulations limiting the operation of the generator in the
case of particular operating conditions (for ex. rules for prevention of accidents/
VBG, VDE 0706, conditions by the (German) employer's liability insurance
association or similar) must be taken into account.
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GTS GmbH & Co. KG, Ziegelfeldstraße 18, D - 73563 Mögglingen,
Telefon: +49 (0) 7174/89800-0, Telefax: +49 (0) 7174/89800-25
Insulation monitor - GMWISO 1.05
Warnings and informations on generatots with GMWISO
Since the stand-by electric-power generators equipped with the system of
protection "Fuse disconnection with insulation monitoring and cut-off" have mainly
been conceived for the use by non-electricians, it must be possible for all users of
the stand-by electric-power generator to safely operate the stand-by electric-power
generator and to test the additional safety measure against direct contact. Both
must be identified at the device.
At least the following instructions must be attached visibly and permanently to the
electric-power generator.
COMMENT: Depending on the electric-power generator or its purpose, it might be
necessary to attach or enclose further instructions. The exemplary text refers to
the operation of the GMW-SYNCHRO stand-by electric-power generator.
Short operator's guide/information
− Used safety measure: "Fuse disconnection with insulation monitoring and all-polo
Cut-off".
− This device can be operated without grounding.
− The following tests must be carried out daily with the motor running:
1. Unplug all devices; open the cover; safety switch in position "ON",
2. press the test button,
3. check whether the safety switch has triggered and the signal lainp has been
activated,
4. stop the electric?power generator,
5. safety switch in position "ON", close the cover.
− NOTICE: The electric-power generator may only be used if the safety switch
triggered during the test.
− The total length of all lines connected to the electric-power generator mustnt
exceed 250 m.
− If several stand-by electric-power generators are used or if the general network
is also available, the networks mustn't be connected to each other.
− Corrective maintenance at the electrical components of the stand-by electric
power generator and at the electric equipment may only be carried out by
electricians.
− For further safety and operating inforination, please refer to the Operator's
Guide and the relevant regulations.
GTS GmbH & Co. KG, Ziegelfeldstraße 18, D - 73563 Mögglingen,
Telefon: +49 (0) 7174/89800-0, Telefax: +49 (0) 7174/89800-25
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Insulation monitor - GMWISO 1.05
Technische Daten
Nominal supply voltage
(supply/voltage/output)
Operating area
UN
AC 230 V
0.7..1.2 x UN
Nominal supply frequency (V./M./A.) fN
Operating area
50 Hz
35 Hz..65 Hz
Own consumption
P
0.5 VA typ.
Operating time/Operating mode
ED
100 %/S1=DB
(duty cycle)
Measuring D.C. voltage (RISO 6 4)
UM
Holding wire current (at RISO=23 kΩ) I M
Leakage holding-wire current (RISO=0) I MK
DC 11 V
DC 125 µA
DC 165 µA
D.C. internal resistance
Impedance (at 50 Hz)
80 kΩ
100 kΩ
RI
ZI
Max. admissible external D.C. voltage
Max. admissible test voltage (1s)
UN x 2.4
AC 1500 V
Threshold value (static i. e. tA 6 4 = VDE 0413T2/$6.1.1.)
U1, U2 or L1, N/PE (:)
RISO
30 kΩ ± 15 %
L2, L3/PE (:)
RISO
40 kΩ ± 15 %
response lag (sudden modification
tAmax
RISO 6 4 9 RISO # 23 kΩ = 100 kΩ/V Kriterium VDE 01000T728/§4.2.4.2.1)
<1s
Example
Threshold value in the case of faulty insulation/:
behind rectifiers
E1 (L1, N) RISO
100 kΩ ± 25 %
(examples)
B2 (L1, N) RISO
125 kΩ ± 25 %
M3, B6
RISO
400 kΩ ± 25 %
Output
for automatically switching load current releases/remote releases
Output current
max. AC 1A (semiconductor output TRIAC ch.) to connection (2)
Admissible ambient temperature
for storage
for function (VDE 0413T2/§4.6.)
TAmbSt
TAmb
Fitting position
any
Attachment
Fast attachment on mounting rail DIN 50022;
chassis assembly with adapter (on request)
weight
m
8
-30°C..+85°C/243 K..358 K
-10°C..+70°C/263 K..343 K
(0..+40°C/f.gr. VDE 0413T2§4.4)
approx. 180 g (including connecting line)
GTS GmbH & Co. KG, Ziegelfeldstraße 18, D - 73563 Mögglingen,
Telefon: +49 (0) 7174/89800-0, Telefax: +49 (0) 7174/89800-25
Insulation monitor - GMWISO 1.05
Dimensions (height x width x depth)
77 mm x 35 mm (2 T-N) x 44 mm
Connection
approx. 400 mm connecting line with end splices
with 5 leads
Connection method
Load current switch - supply circuit identical with
voltage circuit (input voltage - switched internally)
System of protection(DIN40050)
IP 65 for compund-filled module
Build
Shakeproof in the completely compound-filled module
housing
Regulations
Device corresponds to VDE 0413 part 2/1.73;
Application
for applications acc. to VDE 0100T728§4.2.4.2.1
as well as GW 308
GTS GmbH & Co. KG, Ziegelfeldstraße 18, D - 73563 Mögglingen,
Telefon: +49 (0) 7174/89800-0, Telefax: +49 (0) 7174/89800-25
9