Relay switching behavior = NC
(closed-circuit principle)
With fault storage, manual RESET
W
V
$$
/('
/('
/('
)
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
3UG458. insulation monitoring relay.
9.3 3UG4581 insulation monitoring relay
SIRIUS 3UG4 / 3RR2 monitoring relay
162 Equipment Manual, 07/2021, NEB927043002000/RS-AD/005
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