Siemens 3UG4 - Page 201

3UG4625 residual current monitoring relay with 3UL23 transformer
8.3 Functions
3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004
201
Display
Memory = no; Init = OK
Relay switching behavior = NC (closed-circuit principle)
I▲ / I!
Mem = no
Init = OK
Display
Memory = yes; Init = OK
Relay switching behavior = NO (open-circuit principle)
I▲ / I!
Mem = yes
Init = OK
Display
Memory = yes; Init = OK
Relay switching behavior = NC (closed-circuit principle)
I▲ / I!
Mem = yes
Init = OK
Note
The system is immediately switched off in the event of an open
-circuit or short-circuit in the
transformer connection cables.