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2 Functions
Figure 2-89
2.15.1.5 Fault Reactions
Depending which kind of self supervision function is picked up, an alarm is given, the
processor is restarted or the device is taken out of operation. If the fault is still present
after three restart attempts, the device will take itself out of service and indicate this
condition by dropout of the "Device OK" relay, thus indicating device failure. The red
LED „ERROR" on the device front lights up, provided the auxiliary voltage is available,
and the green LED „RUN" goes off. If the internal auxiliary voltage supply fails, all
LEDs are dark. Table 2-7 shows a summary of the monitoring functions and the mal-
function responses of the relay.
210
Logic of the Positive Sequence System Phase Angle Monitoring
7SD610 Manual
C53000-G1176-C145-4
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