Reactive Power Compensation - Siemens SIRIUS 3RW50 Manual

2.2

Reactive power compensation

Capacitors for improving the power factor (reactive power compensation)
No capacitors must be connected to the output terminals of the 3RW5 soft starter. If
connected to the output terminals, the 3RW5 soft starter will be damaged.
Active filters, e.g. for reactive power compensation, must not be operated parallel to the
motor control device.
If capacitors are to be used to correct the power factor (actively or passively), they must be
connected on the line side of the device. They must not actively control the power factor
during the starting and coasting down phases. If a contactor disconnector or main contactor
are used together with the 3RW5 electronic soft starter, the capacitors must be disconnected
from the 3RW5 soft starter when the contactor is open.
SIRIUS 3RW50 soft starter
Manual, 09/2019, A5E35628455002A/RS-AA/001
Safety information
2.2 Reactive power compensation
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