4 Technical Data
478
7UT613/63x Manual
C53000-G1176-C160-2
4.17 Circuit Breaker Failure Protection
Circuit Breaker Supervision
Starting Conditions
Times
Current flow monitoring 0.04 A to 1.00 A
1)
for the respective side
Steps 0.01 A
Dropout-to-pickup ratio approx. 0.9 for I ≥ 0.25 A
1)
Tolerance 5 % of set value or 0.01 A
1)
Breaker status monitoring via circuit breaker auxiliary contacts and
binary input
1)
Secondary values based on I
N
= 1 A; for I
N
= 5 A the currents must be multiplied by 5.
For breaker failure protection internal trip
external trip (via binary input)
Pickup time for f
N
= 50 / 60 Hz approx. 3 ms with measured quantities,
approx. 20 ms after switch-on of measured
quantities
Pickup time for f
N
= 16.7 Hz approx. 60 ms after switch-on of measured
quantities
Dropout time for f
N
= 50/60 Hz approx. 25 ms
Dropout time for f
N
= 16.7 Hz approx. 75 ms
Times 0.00 s to 60.00 s; ∞ Steps 0.01
Time tolerance 1 % of set value or 10 ms
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