GUID-A2EBA677-AEF4-451B-807B-20F50D5894C7 V1 EN
Figure 57: Disturbance recorder
Two separate TCS functions are included: TCSSCBR1 for PO3 (X100:16-19) and
TCSSCBR2 for PO4 (X100:20-23). Both functions are blocked by the Master Trip
(TRPPTRC1 and TRPPTRC2) and the circuit breaker open position signal. The TCS
alarm indication is connected to LED 9.
The fuse failure supervision provides functionality to detect failures in voltage
measurement circuits. Failures, such as open miniature circuit breaker, are detected,
and the alarm is connected to the supervision alarm LED 9.
Failures in current measuring circuits are also detected by the current measuring
circuit supervision function CCRDIF. When a failure is detected, the blocking signal
is activated in the current protection functions measuring the calculated sequence-
component currents. Thus, unnecessary operation can be avoided. The alarm signal
is connected to the supervision alarm LED 9.
1MRS756378 D Section 3
REF615 variants
REF615 103
Application Manual
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