Sine-Wave Filter - Siemens SINAMICS S120 Function Manual

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7.5 Sine-wave filter

Sine-wave filter

The sine-wave filter limits the voltage rate-of-rise and the capacitive charge/discharge

currents that usually occur with converter operation. It also prevents additional noise caused

by the pulse frequency. The service life of the motor is the same as that with direct line

The sine-wave filter is only available for vector control.

Damage to a sine-wave filter through incorrect parameter assignment

The sine-wave filter can be damaged as a result of an incorrect parameter assignment.

• Activate the sine-wave filter during commissioning via parameter p0230 = 3.

Damage to the sine-wave filter if a motor is not connected

Sine-wave filters, which are operated without a motor being connected, can be damaged or

• Never operate a sine-wave filter on the Power Module or Motor Module without a

Usage restrictions for sine-wave filters

The following restrictions must be taken into account when a sine-wave filter is used:

● The output frequency is limited to a maximum of 150 Hz.

● The modulation type is permanently set to space vector modulation without overload. This

reduces the maximum output voltage to approx. 85% of the rated output voltage.

● Maximum permissible motor cable lengths:

– Unshielded cables: Max. 450 m

– Shielded cables: Max. 300 m

● Further restrictions are contained in the following device manuals:

– SINAMICS S120 AC Drive

– SINAMICS S120 air-cooled chassis power units

– SINAMICS S120 liquid-cooled chassis power units

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 sine-wave

connected motor.

Function Manual, 11/2017, 6SL3097-4AB00-0BP5

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