Motor Reactors; Description; Safety Information - Siemens SINAMICS S120 Equipment Manual

Motor-side power components

6.2 Motor reactors

6.2 Motor reactors
6.2.1

Description

Motor reactors reduce the voltage stress on the motor windings by reducing the voltage
gradients at the motor terminals that occur when motors are fed from drive converters. At the
same time, the capacitive re-charging currents that additionally load the output of the Power
Modules or Motor Modules when longer motor cables are used are simultaneously reduced.
6.2.2

Safety information

CAUTION
The 100 mm cooling clearances above and to the side of the components must be
observed.
Note
The connecting cables to the Power Modules or Motor Modules must be kept as short as
possible (max. 5 m).
CAUTION
When using motor reactors that SIEMENS has not approved for SINAMICS, then these can
thermally damage the reactor.
The surface temperature of the motor reactors can exceed 80°C.
CAUTION
If a motor reactor is connected to the Power Module or Motor Module, it must be activated
during commissioning (p0230 = 1).
CAUTION
The maximum permissible output frequency when sine-wave filters are used is 150 Hz.
CAUTION
The maximum permissible pulse frequency when motor reactors are used is 2.5 Hz or
4 kHz.
176
CAUTION
Chassis Liquid Cooled Power Units
Manual, (GH7), 01/2011, 6SL3097-4AM00-0BP1