Siemens SIPROTEC 7UM62 - 4.31 Breaker Failure Protection (ANSI 50 BF)

Technical Data
4.31 Breaker Failure Protection (ANSI 50BF)
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
507
4.31 Breaker Failure Protection (ANSI 50BF)
Setting Ranges / Increments
Times
Tolerances
Influencing Variables for Pickup Values
Pickup thresholds B/F I>for I
N
= 1 A 0.04 A to 2.00 A Increments 0.01 A
for I
N
= 5 A 0.20 A to 10.00 A Increments 0.01 A
Delay Time BF-T 0.06 s to 60.00 s or ∞ Increments 0.01 s
Pickup Times
– On Internal Start
– Using Controls (CFC)
– For external Start
Dropout Time
approx. 50 ms
approx. 50 ms
approx. 50 ms
approx. 50 ms
Pickup threshol B/F I>for I
N
= 1 A 1 % of setting value or 10 mA
for I
N
= 5 A 1 % of setting value or 50 mA
Delay Time BF-T 1 % or 10 ms
Power supply direct voltage in range 0.8 ≤ U
Aux
/U
AuxN
≤ 1.15 ≤ 1%
Temperature in range 23.00 °F (–5 °C) ≤ Θ
amb
≤ 131.00 °F (55 °C) ≤ 0.5 %/10 K
Frequency in range 0.95 ≤ f/f
N
≤ 1.05 ≤ 1%
Harmonics
– Up to 10 % 3rd harmonic
– Up to 10 % 5th harmonic
≤ 1%
≤ 1%