SIEMENS
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Siemens D 21.4 · 2017
SINAMICS S120 drive system
Chassis format
Motor-side power components for chassis format
> dv/dt filters plus VPL
7
■
Overview
dv/dt filter plus VPL (
V
oltage
P
eak
L
imiter) limit the voltage
rate-of-rise dv/dt to values < 500 V/
μ
s and the typical voltage
peaks to the following values in accordance with the limit
value curve according to IEC/TS 60034-17: 2006:
< 1000 V at
U
line
< 575 V
< 1250 V at 660 V <
U
line
< 690 V
Standard motors with standard insulation and without insulated
bearings with a supply voltage of up to 690 V can be used for
converter operation if a dv/dt filter plus VPL is used.
dv/dt filters plus VPL are designed for the following maximum
motor cable lengths:
•
Shielded cables: 300 m (328 ft) (e.g. Protodur NYCWY)
•
Unshielded cables: 450 m (1476 ft) (e.g. Protodur NYY)
For shorter cable lengths (100 m shielded, 150 m (492 ft)
unshielded), see also dv/dt filter compact plus VPL.
Notice:
The maximum permissible cable length between the dv/dt filter
plus VPL and the Power Module/Motor Module is 5 m (16.4 ft).
■
Design
The dv/dt filter plus VPL consists of two components, which are
also supplied as separate mechanical units:
•
dv/dt reactor
•
Voltage limiting network, which cuts off the voltage peaks and
feeds the energy back to the DC link
© Siemens AG 2017