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Siemens CR 1 · 2015
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Drive systems
SINAMICS S120 Cabinet Modules
Motor Double Choke Modules
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Overview
Motor reactors reduce the voltage stress on the motor windings
by reducing the voltage gradients at the motor terminals that oc-
cur when motors are fed from drive converters. At the same time,
the capacitive charge/discharge currents that occur at the con-
verter output when long motor cables are used are reduced. Sui-
tably dimensioned motor reactors therefore enable large capa-
citances and thus longer motor cables to be connected. Their
use is generally recommended in the case of multi-motor drives.
With option
L08
for Motor Modules, a motor reactor is integrated
into the Motor
Module up to cabinet size
GX (outputs of less than
315 kW). Due to space constraints, a separate cabinet must be
planned for the output range 315 to 450 kW (cabinet size HX).
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Design
The Motor Double Choke Modules are equipped as standard
with 2 identical motor reactors. Two Motor Modules can be con-
nected to one Motor Double Choke Module, depending on the
type selected.
© Siemens AG 2015