Siemens SIRIUS 3RU User Manual

Operation
9.2 Setting the tripping class/ground-fault detection (3RB21 / 3RB31)
SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays
116 Manual, 09/2016, A5E03656507420A/RS-AB/003
9.2
Setting the tripping class/ground-fault detection (3RB21 / 3RB31)
In the case of 3RB21 / 3RB31 electronic overload relays, it is also possible to select the
tripping class (CLASS 5E, 10E, 20E or 30E) via a second rotary knob using a screwdriver
and activate or deactivate internal ground-fault monitoring.
There are 8 possible settings:
● CLASS 5E, 10E, 20E and 30E without ground-fault detection (STANDARD)
● CLASS 5E, 10E, 20E and 30E without ground-fault detection (Gnd-FAULT)

Siemens SIRIUS 3RU Specifications

General

Brand	Siemens
Model	SIRIUS 3RU
Category	Control Unit
Language	English