Circuit Breaker Failure Protection 50Bf - Siemens siprotec SJ62 User Manual

4.19

Circuit Breaker Failure Protection 50BF

Setting Ranges / Increments
Times
Tolerances
Influencing Variables for Pickup Values
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
Pickup of Element 50,
„BkrClosed I MIN"
Time Delay TRIP-Timer
Pickup Times
– On Internal Start
– Using Controls
– For external Start
Dropout Time
Pickup of Element 50, „BkrClosed I MIN"
Time Delay TRIP-Timer
Power supply direct voltage in range 0.8 ≤
≤ 1.15
V /V
PS PSNom
Temperature in Range
23 °F (–5 °C) ≤ Θ ≤ 131 °F (55 °C)
amb
Frequency in Range 0.95 ≤ f/f
Harmonics
- Up to 10 % 3rd harmonic
- Up to 10 % 5th harmonic
1)
A further delay for the current may be caused by compensation in the CT secondary circuit.
4.19 Circuit Breaker Failure Protection 50BF
for I = 0.04 A to 1.00 A
Nom
1 A
for I = 0.20 A to 5.00 A
Nom
5 A
0.06 s to 60.00 s or ∞
included in time delay
included in time delay
included in time delay
Approx. 25 ms
2 % of setting value;
or 10 mA for I
or 50 mA for I
1 % or 20 ms
1 %
0.5 %/10 K
≤ 1.05
1 %
Nom
1 %
1 %
Increments 0.01 A
Increments 0.01 s
1)
= 1 A
Nom
= 5 A
Nom
500