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Times
Shortest trip time
Dropout time
Stage timers
Time expiry tolerances
The set times are pure delay times with definite time protection.
Emergency operation
If the differential protection and the distance protection operate in parallel in the protective relay, emergency operation will
not be activated unless both protection functions have become ineffective.
In case of measured voltage failure, e.g. voltage transformer mcb trip see Section 4.16 „Time Overcurrent Protection"
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
Approx. 17 ms (50 Hz) /15 ms (60 Hz) with fast relay and
Approx. 12 ms (50 Hz) /10 ms (60 Hz) with high-speed relay
Approx. 30 ms
0.00 s to 30.00 s; ∞
for all zones; separate time setting pos-
sibilities for single-phase and multi-
phase faults for the zones Z1, Z2, and
Z1B
1 % of setting value or 10 ms
Technical Data
4.6 Distance Protection (optional)
Increments 0.01 s
595
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