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Siemens AG 6SE8004-0BH76
28
SIMOVERT MV Commissioning Instructions
3.1.2
Insulation monitoring
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The SIMOVERT DRIVE drive converter is operated, non-grounded through an IT
supply network. For safety reasons it is necessary to be able to detect an insulation
fault. For this reason, SIMOVERT drive converters are equipped with a system,
which continually monitors the insulation conditions of the drive converter, including
that of the motor. The drive converter is shutdown with a fault condition (fault class
1) if an insulation fault develops. Only one insulation monitoring device may be
connected in each connected IT supply system.
It automatically adapts itself to the line supply discharge capacitance.
The monitoring system must be isolated from the line supply for the duration of the
test, before insulation- and voltage tests and checks are made in the supply
network.
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The values for "Alarm1/2" in the setup must be set appropriately high due to the
series resistance R190 and grounding resistor R15 . The following setting values
are recommended: For "Alarm1" = 900 k
Ω
= "Alarm2".
Under certain circumstances, the values must be adapted to the requirements of
the network to be monitored.. For example, for a 0
Ω
ground fault at the C(+) rail,
an insulation resistance is displayed which is the same as the integrated resistor
R190:
R190 = 140 k
Ω
for a 6 kV and 6.6 kV rated motor voltage
When the recommended setting value is not used, it should be observed that the
value is always greater than that of resistor R190 and lower than R190 + R15 .
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R190 = 140 k
Ω,
permissible insulation resistance > 180 k
Ω ⇒
"Alarm1" = 320 k
Ω
= "Alarm2"
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SETUP1
SETUP2
ALARM1=900k
ALARM1: AC OR DC
ALARM2=900k
ALARM2: AC OR DC
K1: 12 - 11 14
AGH: AK...AK80
K2: 22 - 21 24
COUPLING TEST : ON
FLASH: OFF
RELAYTEST: ON
CE MAX: 150µF
PASSWORD: OFF
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The A-ISOMETER IRDH265 automatically executes a self-test, if the insulation
resistance of the line supply is > 20 M
Ω
, or every 24 h, if an output relay was pre-
selected for the system error message.
Содержание SIMOVERT MV Series
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