- Siemens Cordless Telephone User Manual

Basic functions
6.5 dv/dt filter plus VPL
Drive Functions
186 Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
● Maximum permissible motor cable lengths:
– Unshielded cables: max. 150 m
– Shielded cables: max. 100 m
● Other restrictions: see the Equipment Manual.
Note
If a filter cannot be parameterized (p0230 < 3), this means that a filter has not been
provided for the component. In this case, the drive converter must not be operated with a
sinusoidal filter.
Table 6-5 Parameter settings for sinusoidal filters
Order no. Name Setting
p0233 Power unit motor reactor Filter inductance
p0234 Power unit sinusoidal filter
capacitance
Filter capacitance
p0290 Power unit overload response Disable pulse frequency reduction
p1082 Maximum rotational speed Fmax filter/pole pair number
p1800 Pulse frequency Nominal pulse frequency of the filter
p1802 Modulator modes Space vector modulation without
overmodulation
6.5 dv/dt filter plus VPL
Description
The dv/dt filter plus VPL consists of two components, the dv/dt reactor and the voltage
limiting network (Voltage Peak Limiter), which limits voltage peaks and returns the energy to
the DC link.
The dv/dt filter plus VPL is to be used for 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 VPL limit 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):
< < 1000 V at Uline < 575 V
< 1250 V with 660 V < Uline < 690 V
WARNING
When a dv/dt filter is used, the maximum pulse frequency of the drive converter is 2.5 kHz
(chassis power units up to 250 kW at 400 V) or 4 kHz (chassis power units from 250 kW to
800 kW at 400 V). If a higher pulse frequency is set, then this could destroy the dv/dt filter.