3UG458. insulation monitoring relay
9.4 3UG4582/3UG4583 insulation monitoring relays
3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004
259
The figure below shows monitoring for ground fault/insulation fault in the case of an
ungrounded 4-wire AC system.
Image 9-10 Monitoring for ground fault/insulation fault in the case of an ungrounded 4-wire AC system
Note
The maximum cable length of the control cables is 50
m or 100 pF/m.
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