Siemens SIRIUS 3UG4 - Page 63

Cable break detected
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1 2
3
① Cable break detected
② No cable break
③ Hysteresis cable break:
- S00: 1.2 A to 1.6 A
- S0: 3.0 A to 4.0 A
- S2: 6.0 A to 8.0 A
Figure 4-4 Cable break
If a cable break is detected in a branch circuit (time ①), all delay times which are running (onDel,
RsDel, Del) are aborted and both the CO contact and the semiconductor output change their
switching state immediately (≤ 200 ms).
When a de󹪝ned current 󹪞ow returns to all branch circuits (1/L1 - 2/T1, 3/L2 - 4/T2 und 5/L3 - 6/T3)
(time ②), the CO contact and the semiconductor output respond again according to the
de󹪝ned settings.
If manual RESET (Mem = yes) is selected, the tripping state is saved.
3RR2 current monitoring relays
4.5 3RR22 current monitoring relays
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005 63