Diagnostics; Diagnostics With Leds - Siemens 3UG4 User Manual

3UG458. insulation monitoring relay
9.3 3UG4581 insulation monitoring relay
9.3.4

Diagnostics

9.3.4.1

Diagnostics with LEDs

Status display
The following information indicates the operating state on the 3UG4581 insulation monitoring
relays:
Operating state
Self-test (after U
No fault
Insulation fault (threshold undershot)
System leakage capacitance too high at
device startup
Measuring result invalid
Internal fault
Test function active
Manual RESET possible
The device has tripped following an insulation fault. The fault has been stored and the insulation
1)
resistance has reverted to a value above the set threshold including hysteresis.
Dependent on the fault.
2)
The switching behavior of the output relay is shown in Chapter "Functions (Page 219)".
226
= on)
S
1)
LED (green) LED F (red)
Off
Off
Off
Off
2)
Manual, 05/2016, NEB927043002000/RS-AC/004
LED (yellow)
Off
Off
Off
Off
Off
Off
3UG4 / 3RR2 monitoring relays