Siemens siprotec 7SJ63 - Breaker Failure Protection (50 BF)

Technical Data
10-34 7SJ63 Manual
C53000-G1140-C120-1
10.14 Breaker Failure Protection (50BF)
Pickup and Time
Delay Ranges/
Resolutions
Pickup of 50 Element BkrClosed I MIN 0.20 A to 5.00 A
1
) (Increments 0.05 A)
1
)
Time Delay TRIP-Timer 0.06 s to 60.00 s (Increments 0.01 s)
or ∞ (no trip)
Initiating Time Pickup Times (protection initiates)
- For Internal Start included in time delay
- Using Controls included in time delay
- For External Start included in time delay
Reset Time approx. 25 ms
Tolerances Pickup Current BkrClosed I MIN3% of set value, or 50 mA
1
)
Time Delay TRIP-Timer 1% or 20 ms
Influencing Vari-
ables
Power supply DC voltage (V
DC
) in range
0.8 ≤ V
PS
/ V
PS nominal
≤ 1.15 1%
Temperature in range
23º F ≤ ϑ
amb
≤ 131º F 0.3 % /10º F
Frequency in range
0.95 ≤ f/f
N
≤ 1.05 1%
Harmonics
- Up to 10% 3
rd
harmonic 1%
- Up to 10% 5
th
harmonic 1%
1
) For I
N
= 1A, divide all limits by 5.
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