Hitachi Relion 670 Series Product Manual page 78

Line differential protection RED670
Version 2.2
Table 27. Auxiliary DC supply voltage influence on functionality during operation
Dependence on
Ripple, in DC auxiliary voltage
Operative range
Auxiliary voltage dependence, operate
value
Interrupted auxiliary DC voltage
Interruption
interval
0–50 ms
0–∞ s
Restart time
Table 28. Frequency influence (reference standard: IEC 60255–1)
Dependence on
Frequency dependence, operate value
Frequency dependence for distance protection operate value
Harmonic frequency dependence (20% content)
Harmonic frequency dependence for distance protection (10%
content)
Harmonic frequency dependence for high impedance differential
protection (10% content)
Harmonic frequency dependence for overcurrent protection
78
Reference value Within nominal
range
max. 2% 15% of EL
Full wave rectified
±20% of EL
24-60 V DC ± 20%
90-250 V DC ± 20%
Within nominal range
f
r
f
r
f
r
f
r
2
2
2
2
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Influence
0.01%/%
0.01%/%
No restart
Correct behaviour at power down
< 300 s
±2.5 Hz for 50 Hz
±3.0 Hz for 60 Hz
±2.5 Hz for 50 Hz
±3.0 Hz for 60 Hz
nd rd th
, 3 and 5 harmonic of f
r
nd rd th
, 3 and 5 harmonic of f
r
nd th
, 3rd and 5 harmonic of f
r
nd rd th
, 3 and 5 harmonic of f
r
1MRK 505 379-BEN R
Influence
±1.0%/Hz
±2.0%/Hz
±2.0%
±10.0%
±10.0%
±3.0%
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