Diagnostics With Led - Siemens SIRIUS 3RT Series System Manual

SIRIUS 3RR2 current monitoring relays
8.8 Operation
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
FAULT off
FAULT steady on
FAULT flashing slowly
FAULT flashing rapidly
READY off
READY on
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.
710
Meaning
Measured value is within range limits
Device has tripped
Delay time is running
Cable break/phase failure detected
No voltage at B1 - B2
Voltage at B1 - B2
System Manual, 01/2011, A8E56203870002-03
SIRIUS Innovations