User Manual
3UG458. insulation monitoring relay.
10.3 3UG4581 insulation monitoring relay
3UG4 / 3RR2 monitoring relays
212 Manual, 02/2013, NEB927043002000/RS-AA/002
Function diagrams 3UG4581
Relay switching behavior = NC
(closed-circuit principle)
Without fault storage, autoreset
W
V
$$
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)
① Test (Y1-Y3)
② Reset (Y2-Y3)
③ Measured value
④ Hysteresis
⑤ Threshold
⑥ Green
⑦ Red
⑧ Yellow
t
S
= Time for internal device test after applying the supply voltage