SIRIUS 3RR2 current monitoring relays
8.8 Operation
SIRIUS Innovations
710 System Manual, 01/2011, A8E56203870002-03
8.8.1.7 Diagnostics with LED
Status display
On the analog setting current monitoring relay, 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 flashing slowly Delay time is running
FAULT flashing rapidly Cable break/phase failure detected
READY off No voltage at B1 - B2
READY on Voltage at B1 - B2
You will find more information about the LED display and its various settings in the chapter
titled Function charts for Basic analog setting current monitoring relay (Page 692
).
Cable break detected
The CO contact responds immediately when a cable break is detected (only residual current
in branch circuit 1L1/2T1 or 3L2/4T2). All running delay times are aborted and the red
FAULT LED flashes rapidly. If the load current in both circuits falls below the lower range
limit, the current monitoring relay responds again in accordance with the settings made. If
Memory = I, the tripping state is saved.
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