ABB 1MRK002826-AG - Page 64

Table 24. Auxiliary DC supply voltage influence on functionality during operation
Dependence on Reference value Within nominal
range
Influence
Ripple, in DC auxiliary voltage
Operative range
max. 2%
Full wave
rectified
15% of EL 0.01%/%
Auxiliary voltage dependence,
operate value
±20% of EL 0.01%/%
Interrupted auxiliary DC voltage 24-60 V DC ± 20%
90-250 V DC ± 20%
Interruption
interval
0–50 ms No restart
0–∞ s Correct behaviour at power down
Restart time < 300 s
Table 25. Frequency influence (reference standard: IEC 60255–1)
Dependence on Within nominal range Influence
Frequency dependence, operate value f
r
±2.5 Hz for 50 Hz
f
r
±3.0 Hz for 60 Hz
±1.0%/Hz
Frequency dependence for distance protection operate value f
r
±2.5 Hz for 50 Hz
f
r
±3.0 Hz for 60 Hz
±2.0%/Hz
Harmonic frequency dependence (20% content)
2
nd
, 3
rd
and 5
th
harmonic of f
r
±2.0%
Harmonic frequency dependence for distance protection (10%
content)
2nd, 3rd and 5
th
harmonic of f
r
±10.0%
Harmonic frequency dependence for high impedance differential
protection (10% content)
2
nd
, 3rd and 5
th
harmonic of f
r
±10.0%
Harmonic frequency dependence for overcurrent protection
2
nd
, 3
rd
and 5
th
harmonic of f
r
±3.0%
Generator protection REG670
1MRK 502 074-BEN M
Version 2.2
64 Hitachi Power Grids
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