L08/L09, Motor Reactor / 2 Motor Reactors In Series - Siemens SINAMICS S120 Equipment Manual

Options

8.14 L08/L09, motor reactor / 2 motor reactors in series

8.14 L08/L09, motor reactor / 2 motor reactors in series
Availability of option
This option is available for the following S120 Cabinet Modules:
● Motor Module in chassis format (L08)
● Booksize Cabinet Kit (L08/L09)
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
Motor Module when long motor cables are used are reduced.
In addition, a motor reactor must be used for parallel connection of Motor Modules in chassis
format when a motor with a single-winding system is being supplied and the required
minimum motor cable lengths cannot be maintained.
With option L08, one motor reactor is used; with option L09, two motor reactors switched in
series are used to enable the use of a longer motor cable.
CAUTION
The surface temperature of the motor reactors can exceed 80°C.
Note
Due to limited space, only one motor reactor can be used for the Booksize Cabinet Kit with
Double Motor Module.
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S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A