3RR2 current monitoring relays
4.5 3RR22 current monitoring relays
3UG4 / 3RR2 monitoring relays
72 Manual, 05/2016, NEB927043002000/RS-AC/004
If the device is set to automatic reset, the CO contact and the semiconductor output will
respond once a previously occurring error has been dealt with and the reclosing delay time
has elapsed. A previously occurring error is, therefore, not saved.
If manual RESET is selected, the CO contact remains in the current switching state even if a
previously occurring error has been dealt with.
This saved fault condition can be reset by pressing both arrow keys at the same time for
longer than 2.5 s or by disconnecting and reconnecting the auxiliary voltage.
Note
Semiconductor output
The semiconductor output always responds in automatic re
set.
Hysteresis cable break:
- S00: 1.2 A to 1.6 A
- S0: 3.0 A to 4.0 A
Image 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 defined current flow 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 defined settings.
If manual RESET (Mem = yes) is selected, the tripping state is saved.
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