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

Basic functions

7.7 dv/dt filter compact plus Voltage Peak Limiter

7.7 dv/dt filter compact plus Voltage Peak Limiter
The dv/dt filter compact plus Voltage Peak Limiter consists of two components: The dv/dt
reactor and the voltage limiting network (Voltage Peak Limiter, VPL). A VPL cuts off the
voltage peaks and feeds the energy back into the DC link.
The dv/dt filter compact plus Voltage Peak Limiter is designed for use with motors for which
the voltage strength is unknown or is insufficient.
The dv/dt filter compact plus Voltage Peak Limiter limits the voltage load on the motor cables
to values in accordance with the limit value curve A in compliance with IEC/TS 60034-
25:2007.
The voltage rate-of-rise is limited to < 1600 V/µs. The voltage peaks are limited to < 1400 V.
NOTICE
Low output frequency when using the dv/dt filter with Voltage Peak Limiter
Continuous operation with output frequencies of less than 10 Hz can thermally destroy the
dv/dt filter.
When a dv/dt filter compact plus Voltage Peak Limiter is used, the drive must not be
continuously operated with an output frequency lower than 10 Hz.
A maximum operating time of 5 minutes at an output frequency less than 10 Hz is permitted
if this is then followed by an operating time of 5 minutes with an output frequency of greater
than 10 Hz.
NOTICE
High pulse frequency when using the dv/dt filter with Voltage Peak Limiter
Setting a pulse frequency that is too high can lead to destruction of the dv/dt filter.
When using a dv/dt filter compact with Voltage Peak Limiter, the pulse frequency of a
Power Module or a Motor Module must not exceed 4 kHz.
For the following chassis format power units, the pulse frequency must not exceed 2.5 kHz:
• 400 V: Up to 250 kW
• 400 V: 315 kW - 800 kW
• 690 V: 75 kW - 1200 kW
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Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
Drive functions