Auxiliary Release; Description - Siemens SIRIUS 3RT Series System Manual

SIRIUS 3RV2 motor starter protectors
4.9 Accessories
4.9.5

Auxiliary release

4.9.5.1

Description

Auxiliary release
The releases, which are not size-specific, are available in three versions:
● Undervoltage release
● Undervoltage release with leading auxiliary contacts (2 NO contacts)
● Shunt release
The releases are mounted on the right-hand side of the motor starter protector and have a
width of 18 mm. They are available for all commonly used voltages all over the world. They
can be installed inside molded-plastic enclosures.
Note
 One auxiliary release can be mounted on each motor starter protector.
 No accessories can be mounted on the right-hand side of 3RV21 motor starter protectors
with overload relay function.
Shunt release
For remote-controlled tripping of the motor starter protector
● Via PLC: The release's coil should only be energized for a brief period.
Undervoltage release
The undervoltage release trips the motor starter protector in the event of voltage interruption
(e.g. if the power supply fails) and prevents the motor from being unintentionally restarted
when the voltage is restored. The motor starter protector then has to be reclosed by hand.
Particularly suitable for EMERGENCY OFF disconnection via corresponding EMERGENCY
OFF pushbutton according to IEC 60204-1 (VDE 0113)
416
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03