Siemens 3UG4 - Diagnostics

3RR2 current monitoring relays
4.4 3RR21 current monitoring relays
3UG4 / 3RR2 monitoring relays
58 Manual, 05/2016, NEB927043002000/RS-AC/004
4.4.4
Diagnostics
Status display
On the current monitoring relay with analog setting, two status LEDs indicate the operating
state:
● FAULT (red)
● READY (green)
Display
Meaning
FAULT off
Measured value is within range limits
FAULT steady on
Device has tripped
FAULT flashes at 1 Hz
Delay time is running
FAULT flashes at 4 Hz Cable break/phase failure detected
READY off
Voltage is not applied at B1 - B2
READY on Voltage is applied at B1 - B2
You can find more information about the LED display response in the Chapter "Function
(Page 54)."