Signaling Switch; Description - Siemens SIRIUS 3RT Series System Manual

4.9.4

Signaling switch

4.9.4.1

Description

Function
The signaling switch has two contact systems:
● One contact system (1 NO contact + 1 NC contact) signals general tripping irrespective of
whether this was caused by a short circuit, an overload, or an auxiliary release.
● The other contact system (1 NO contact and 1 NC contact) only switches in the event of
short-circuit release.
To be able to reclose the motor starter protector after a short circuit, once the cause of the
error has been dealt with, the signaling switch has to be reset by hand.
Versions
Signaling switch
Signaling switch
Note
 A signaling switch can be mounted on the side of the motor starter protector.
 An auxiliary switch (2 contacts) and a signaling switch can be mounted individually or
together.
 The signaling switch cannot be used with 3RV27 and 3RV28 circuit breakers.
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
Versions Connection
system
2 contact systems Screw-type/spring-
each with 1 NO loaded
contact and 1 NC connection, ring
contact cable lug
SIRIUS 3RV2 motor starter protectors
4.9 Accessories
Width Mountable
18 mm Left-hand side
413