Dv/Dt Filter Plus Vpl - Siemens SINAMICS S120 Function Manual

7.6

dv/dt filter plus VPL

The dv/dt filter plus Voltage Peak Limiter consists of two components: The dv/dt reactor and
the voltage limiting network (Voltage Peak Limiter, VPL), which cuts off the voltage peaks
and feeds back the energy to the DC link.
The dv/dt filter plus Voltage Peak Limiter is designed for use with motors for which the
voltage strength 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 rate of voltage rise to values < 500 V/µs
and the typical voltage peaks to the values below (with motor cable lengths of < 150 m):
● Voltage peaks ÛLL (typically) < 1000 V for V
● Voltage peaks ÛLL (typically) < 1250 V for 660 V < V
Restrictions
The following restrictions must be taken into account when a dv/dt filter is used:
● The output frequency is limited to a maximum of 150 Hz.
● Maximum permissible motor cable lengths:
● Further restrictions are contained in the following device manuals:
NOTICE
Damage to the dv/dt filter through too high a pulse frequency when using with Voltage Peak
Limiter
When a dv/dt filter with Voltage Peak Limiter is used, the maximum permissible pulse
frequency of the Power Module or Motor Module is 4 kHz (chassis power units up to 250
kW at 400 V) or 2.5 kHz (chassis power units from 315 kW to 800 kW at 400 V or 75 kW up
to 1200 kW at 690 V). If a higher pulse frequency is set, then this could destroy the dv/dt
filter.
Commissioning
The dv/dt filter must be activated when commissioning the system (p0230 = 2).
Drive functions
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
– Shielded cables: Max. 300 m
– Unshielded cables: Max. 450 m
– SINAMICS S120 AC Drive
– SINAMICS S120 Chassis Power Units
– SINAMICS S120 Liquid Cooled Chassis Power Units
7.6 dv/dt filter plus VPL
< 575 V
line
< 690 V
line
Basic functions
291