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

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 charge/discharge currents that also occur on the output of the
Power Module or Motor Module when long motor cables are used are reduced.
6.2.2

Safety information

Caution
The 100 mm clearances above and to the side of the components must be observed.
Note
The connecting cables to the Power Module or Motor Module 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.
Caution
The surface temperature of the motor reactors can exceed 80 °C.
Caution
The maximum permissible output frequency when motor reactors are used is 150 Hz.
Chassis Power Units Liquid Cooled
SINAMICS S120 Equipment Manual, Edition 12/2007, 6SL3097-2AM00-0BP4
Motor-Side Power Components
6.2 Motor reactors
6-5