Siemens SIRIUS 3UG4 - Page 196

Application examples
The 󹪝gure below shows monitoring for ground fault/insulation fault in the case of an
ungrounded 4‑wire AC system.
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① Loads
Figure 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.
3UG458. insulation monitoring relay.
9.4 3UG4582/3UG4583 insulation monitoring relays
SIRIUS 3UG4 / 3RR2 monitoring relay
196 Equipment Manual, 07/2021, NEB927043002000/RS-AD/005