L10, Dv/Dt Filter Plus Voltage Peak Limiter - Siemens SINAMICS S120 Equipment Manual

8.15

L10, dv/dt filter plus Voltage Peak Limiter

Availability of option
This option is available for the following S120 Cabinet Modules:
● Motor Module in chassis format
Description
The dv/dt filter plus Voltage Peak Limiter comprises two components: the dv/dt reactor and
the voltage-limiting network (Voltage Peak Limiter), which limits the voltage peaks to the
level of the DC link voltage and returns energy to the DC link.
The dv/dt filters plus Voltage Peak Limiter must be used for motors for which the proof
voltage of the insulation system is unknown or insufficient. Standard motors of the 1LA5,
1LA6, and 1LA8 series only require them at supply voltages > 500 V + 10%.
The dv/dt filter plus Voltage Peak Limiter limits the voltage gradient to values < 500 V/µs and
the typical transients to the values below (with motor cable lengths of < 150 m):
< 1,000 V at U
< 1250 V at 660 V < U
Restrictions
The following restrictions must be taken into account when a dv/dt filter is used:
● The output frequency is limited to no more than 150 Hz.
● Maximum permissible motor cable lengths:
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A
< 575 V
line
< 690 V.
line
– Shielded cables: max. 300 m/150 m
– Unshielded cables: max. 450 m/225 m
8.15 L10, dv/dt filter plus Voltage Peak Limiter
Options
369