SIEMENS
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Siemens IC 10 · 2017
Reversing Contactor Assemblies
SIRIUS 3RA23 reversing contactor assemblies, up to 55 kW
3
■
Benefits
Using wiring kits for reversing contactor assemblies has the
following advantages:
•
Notable reduction of wiring in the control circuit
•
Integrated mechanical interlock for sizes S00 and S0
•
Prevention of wiring errors in the main circuit
Connecting combs for screw terminals also result in:
•
Prevention of wiring errors in the control circuit
•
Reduction of testing costs
•
Ready-jumpered actuation of the auxiliary switches and the
frame (A2)
•
Integrated electrical interlocking
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Accessories
Selecting the auxiliary switches
The following points should be noted:
Size S00
•
For maintained-contact operation:
Use contactors with an NC contact in the basic unit for the
electrical interlock.
•
For momentary-contact operation:
Use contactors with an NC contact in the basic unit for the
electrical interlock; in addition, an auxiliary switch block with
at least one NO contact for latching is required per contactor.
Sizes S0 to S3
•
For maintained-contact operation:
The contactors have two integrated auxiliary contacts (1 NO +
1 NC); the NC contact can be used for electrical interlocking.
•
For momentary-contact operation:
Electrical interlock as for maintained-contact operation; the
NO contact in the basic unit can be used for the latching.
Surge suppression
Sizes S00 to S3
All reversing contactor assemblies can be fitted with RC ele-
ments or varistors for damping opening surges in the coil.
As with the individual contactors, the surge suppressors can
either be plugged onto the top of the contactors (S00) or be
plugged into the front of the contactors (S0 to S3).
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Technical specifications
The technical specifications are the same as for the individual
contactors
(see page 3/19 onwards)
.
More information
Technical specifications,
see
FAQs,
Manuals,
see
•
System Manual "SIRIUS – System Overview",
•
Manual "SIRIUS – SIRIUS 3RT Contactors/Contactor Assemblies",
•
Application Manual "SIRIUS Controls with IE3/IE4 motors:
© Siemens AG 2016