Dv/Dt Filter Compact Plus Voltage Peak Limiter; Description - Siemens SINAMICS S120 Manual

6.4

dv/dt filter compact plus Voltage Peak Limiter

6.4.1

Description

The dV/dt filter compact plus voltage peak limiter comprises two components: The dV/dt
reactor and the voltage-limiting network (voltage peak limiter) which cuts off the voltage
peaks and feeds back the energy into the DC link. The dV/dt filter compact plus voltage peak
limiter is designed for use with motors for which the voltage strength of the insulation system
is unknown or insufficient.
The dV/dt filters compact plus voltage peak limiter limit the voltage load on the motor cables
to values in accordance with the limit value curve A as per IEC/TS 60034-25:2007.
The rate of voltage rise is limited to < 1600 V/µs, the peak voltages are limited to < 1400 V.
Danger of thermal destruction during continuous operation at low output frequencies
When a dV/dt filter compact plus voltage peak limiter is used, the drive must not be
continuously operated with an output frequency less than 10 Hz.
A maximum load duration of 5 minutes at an output frequency less than 10 Hz is
permissible, provided that the converter is then operated with an output frequency higher
than 10 Hz for a period of 5 minutes.
Continuous operation at an output frequency less than 10 Hz can produce thermal overload
and destroy the dV/dt filter.
Risk of destruction during operation with increased pulse frequency
When a dV/dt filter compact plus voltage peak limiter is used, the pulse frequency of the
Motor Module must not exceed 2.5 kHz or 4 kHz. If a higher pulse frequency is set, then
this could destroy the dV/dt filter.
Note
Setting range for pulse frequencies
It is permissible to set pulse frequencies in the range between the rated pulse frequency and
the relevant maximum pulse frequency when a dV/dt filter compact plus voltage peak limiter
is used.
Note
Current derating at increased pulse frequency
For current derating with increased pulse frequency, the derating of the associated Motor
Module is the decisive factor.
Chassis power units
Manual, (GH3), 01/2013, 6SL3097-4AE00-0BP3
WARNING
WARNING
Motor-side power components
6.4 dv/dt filter compact plus Voltage Peak Limiter
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