Start time and instant operation time (trip):
I
M
/I
SET
ratio >1.05
<50 ms
Reset
Reset ratio
95 % of the pick-up setting
Reset time setting
Inaccuracy: Reset time
0.010…10.000 s, step 0.005 s
±1.0 % or ±35 ms
Instant reset time and start-up reset
<50 ms
No
Notte!
e!
• Harmonics generally: The amplitude of the harmonic content has to be least 0.02 × I
N
when
the relative mode (Ih/IL) is used.
• Blocking: To achieve fast activation for blocking purposes with the harmonic
overcurrent stage, note that the harmonic stage may be activated by a rapid load change or
fault situation. An intentional activation lasts for approximately 20 ms if a harmonic
component is not present. The harmonic stage stays active if the harmonic content is above
the pick-up limit.
• Tripping: When using the harmonic overcurrent stage for tripping, please ensure that the
operation time is set to 20 ms (DT) or longer to avoid nuisance tripping caused by the above-
mentioned reasons.
10.2.1.7 Circuit breaker failure protection (CBFP; 50BF/52BF)
Table. 10.2.1.7 - 448. Technical data for the circuit breaker failure protection function.
Measurement inputs
Current inputs
Phase current inputs: I
L1
(A), I
L2
(B), I
L3
(C)
Residual current channel I
01
(Coarse)
Residual current channel I
02
(Fine)
Current input magnitudes
RMS phase currents
RMS residual current (I
01
, I
02
or calculated I
0
)
Pick-up
Monitored signals
Digital input status, digital output status, logical signals
Pick-up current setting:
- IL1…IL3
- I01, I02, I0Calc
0.10…40.00 × I
N
, setting step 0.01 × I
N
0.005…40.00 × I
N
, setting step 0.005 × I
N
Inaccuracy:
- Starting phase current (5A)
- Starting I01 (1 A)
- Starting I02 (0.2 A)
- Starting I0Calc (5 A)
±0.5 %I
SET
or ±15 mA (0.10…4.0 × I
SET
)
±0.5 %I0
SET
or ±3 mA (0.005…10.0 × I
SET
)
±1.5 %I0
SET
or ±1.0 mA (0.005…25.0 × I
SET
)
±1.0 %I0
SET
or ±15 mA (0.005…4.0 × I
SET
)
Operation time
Definite time function operating time setting
0.050…1800.000 s, setting step 0.005 s
Inaccuracy:
- Current criteria (I
M
/I
SET
ratio 1.05
→
)
- DO or DI only
±1.0 % or ±55 ms
±15 ms
Reset
Reset ratio
97 % of the pick-up current setting
Reset time
<50 ms
Genera
Generattor Commander
or Commander
Instruction manual
Version: 2.07
536
© Arcteq Relays Ltd
IM00001
Содержание Generator Commander
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