SIEMENS
3/166
Siemens IC 10 · 2017
Reversing Contactor Assemblies
Reversing contactor assemblies consisting of SIRIUS 3RT1 contactors, up to 250 kW
3
■
Overview
The individual parts for the reversing contactor assemblies for
customer assembly must be ordered separately.
•
3RT contactors: The operating times of the individual
3RT10 contactors are rated in such a way that no overlapping
of the contact making and the arcing time between two con-
tactors can occur on reversing, providing they are interlocked
by way of their auxiliary switches (NC contact interlock) and
the mechanical interlock.
For assemblies with AC operation and 50/60 Hz, a dead inter-
val of 50 ms must be provided when used with voltages over
500 V; a dead interval of 30 ms is recommended for use with
voltages up to and including 400 V. These dead times do not
apply to assemblies with DC operation.
The operating times of the individual contactors are not
affected by the mechanical interlock.
•
Mechanical interlock
•
Wiring kits consisting of link rails
•
Base plate
Additional components
•
for momentary-contact operation: auxiliary switch
(NO contact) for self-locking
•
3RB2 overload relays
(see from page 7/109 onwards)
,
SIMOCODE pro 3UF7 motor management and control
devices
(from page 10/14 onwards)
or 3RN thermistor motor
protection evaluation units
(page 10/164)
can be used as
overload protection.
More information
Home page,
see www.siemens.com/sirius
Industry Mall,
see www.siemens.com/product?3RA23_3RT1
© Siemens AG 2016