Thanks to a special measuring method, a phase failure is detected with certainty despite wide-
range voltage from 160 to 690 V AC and reverse power of up to 80 % from the load in the case
of regenerative power recovery.
On failure of one of the phases (or neutral conductor failure for the 3UG4616 line monitoring
relays), the output relays drop out immediately to protect the application from any damage that
may result. Set delay times have no eect on the phase failure monitoring.
Note
The 3UG4615 and 3UG4616 line monitoring relays are only suitable for line frequencies of 50 /
60 Hz!
You will nd the switching states of the output relays below in section "Function diagrams" and
in Chapter "Diagnostics (Page 108)."
Function diagrams 3UG4615 / 3UG4616
Display Memory = no
Relay switching behavior = NC
(closed-circuit principle)
Memory = no
Relay switching behavior = NO
(open-circuit principle)
11/14
11/12
L3-L2-L1
21/24
21/22
11/14
11/12
L3-L2-L1
21/24
21/22
11/14
11/12
L1-L2-L3
L2-L3
L1-L2-L3
L1-L2-L3
L1-L2-L3-NL1-L2-L3-N
21/24
21/22
11/14
11/12
L1-L2-L3
L2-L3
L1-L2-L3
L1-L2-L3
L1-L2-L3-NL1-L2-L3-N
21/24
21/22
3UG4.1 line monitoring relay
6.6 3UG4615 / 3UG4616 line monitoring relays
SIRIUS 3UG4 / 3RR2 monitoring relay
106 Equipment Manual, 07/2021, NEB927043002000/RS-AD/005
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