Frequency Operating Range
0.9 ≤ f/f
rated
≤ 1.1
According to specified tolerances
10 Hz ≤ f < 0.9 f
rated
1.1 f
rated
< f ≤ 80 Hz
Slightly expanded tolerances
f < 10 Hz
f > 80 Hz
Active
Tolerances
Threshold values, dropout thresholds
2 % of the setting value or 1 % of the rated current
Times
1 % of the setting value or 10 ms
50BF‑I4 Circuit‑Breaker Failure Protection – 3 Pole
Reference
Parameter
Value
I
set
Setting
0.005 to 2 ⋅ I
rated
t
delay1
Stage 1 delay setting
20 to 60000 ms
t
delay2
Stage 2 delay setting
20 to 60000 ms
Operate and Reset Level
Attribute
Value
I
op
Operate level
I
set
, ± 5 % or ± 1 % I
rated
I
reset
Reset level
< 100 % I
op
± 5 % or ± 1 % I
rated
Repeatability
± 1 %
Variation IEC
60255-1
-10 °C to +55 °C
≤ 5 %
f
rated
± 5 %
≤ 5 %
Operate and Reset Time
Attribute
Value
t
basic
Element basic operate time
< 20 ms
t
op
Stage 1
t
delay1
, ± 1 % or ± 20 ms
Stage 2
t
delay2
, ± 1 % or ± 20 ms
Repeatability
± 1 % or ± 20 ms
Overshoot
< 2 ⋅ 20 ms
Disengaging time
< 30 ms
Circuit‑Breaker Supervision
Position supervision via circuit‑breaker auxiliary contacts
For 3 pole CB tripping
1 input each for make contact and break contact
i
i
NOTE
The circuit‑breaker failure protection can also work without the circuit‑breaker auxiliary contacts stated.
Auxiliary contacts are required for circuit‑breaker failure protection in cases where the current flow is
absent or too low for tripping (for example with a transformer or a Buchholz protection).
10.13.2
Technical Data
10.13 50BF Circuit-Breaker Failure Protection – 3 Pole
Reyrolle 7SR5, Transformer Protection Device, Device Manual
475
C53000-G7040-C015-1, Edition 11.2019
Содержание Reyrolle 7SR5
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