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

Basic functions

7.8 dv/dt filter compact plus Voltage Peak Limiter

7.8 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.
This function is only available for vector control.
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 du/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 according to IEC/TS 60034-25:2007.
The voltage rate-of-rise is limited to < 1600 V/µs. The voltage peaks are limited to < 1400 V.
Continuous operation is only permissible for output frequencies higher than 10 Hz.
For short-time operation, output frequencies less than 10 Hz are permissible for a maximum
of 5 minutes. However, this must be followed by a minimum period of 5 minutes, where the
output frequency is higher than 10 Hz.
NOTICE
Damage to the du/dt filter compact plus voltage peak limiter during continuous operation at
low output frequencies
Continuous operation with output frequencies of less than 10 Hz - or not complying with the
permissible time ratings - can thermally destroy the du/dt filter.
• Comply with the specifications.
The maximum permissible pulse frequency when using a du/dt filter:
● For 2.5 kHz
– Chassis power units from 315 kW to 800 kW at 400 V
– Chassis power units from 75 kW to 1200 kW at 690 V
● For 4 kHz
– Chassis power units up to 250 kW at 400 V
NOTICE
Damage to the du/dt filter compact with voltage peak limiter by exceeding the maximum
pulse frequency
Inadmissibly high pulse frequencies can damage the du/dt filter compact with voltage peak
limiter.
• Do not exceed maximum permissible pulse frequency.
330
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Drive functions