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SIRIUS 3RU2/3RB3 overload relays
5.4 Functions
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
501
5.4.4
Indication of the operating state
The prevailing operating state of the 3RU21/3RB30/3RB31 relays is indicated by the position
of the marker on the "TEST function/Switch position indicator" slide.
If the relays are operating without errors, the slide marker will be set to "I". When a device
trips, the slide marker moves to "0". An overload relay can trip for the following reasons:
●
Overload,
●
Phase asymmetry,
●
Phase failure, or
●
Ground fault (3RB31)
●
Internal error (3RB30/3RB31)
Resetting
The relay is reset manually or automatically after a recovery time has elapsed.
Reference
Additional information...
Can be found in the chapter titled...
About resetting
RESET after release (Page 517)
5.4.5
Self-monitoring (3RB30/3RB31 only)
3RB30/3RB31 solid-state overload relays constantly monitor their ability to operate (self-
monitoring) and trip in the event of an internal error.
In such cases you need to contact Technical Assistance on the Internet
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Содержание SIRIUS 3RH Series
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