General - Siemens SINAMICS G120P Operating Instructions Manual

General

Description
The du/dt filter compact plus Voltage Peak Limiter comprises two components: the du/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 du/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 du/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 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 du/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 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.
Uninterrupted duty at an output frequency less than 10 Hz can produce thermal overload
and destroy the du/dt filter.
NOTICE
No operation without connected motor
When a du/dt filter compact plus Voltage Peak Limiter is used, the drive must not be
operated without a connected motor, otherwise the filter could be destroyed.
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 du/dt filter compact plus Voltage Peak Limiter
is used.
dV/dt filter compact plus Voltage Peak Limiter
Operating Instructions, 11/2013, A5E32847614B AA
WARNING
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