ABB Relion 670 Series Product Manual page 119

Generator protection REG670
Version 2.2
Table 149. Voltage harmonic monitoring VHMMHAI (50/60 Hz)
Function
Frequency (0.95 - 1.05) X f
True RMS (10 to 150) V
(10 to 150) V
Fundamental (10 to 150) V
(10 to 150) V
Crest Factor (10 to 150) V
Harmonic (10 to 150) V
Amplitude
Total Harmonic (10 to 150) V
Distortion
(VTHD)
Note:
U - Applied Voltage Fundamental
F
U - Applied Voltage Harmonic (of respective harmonics)
H
U - Actual Voltage = RMS (U
Hitachi Power Grids
GUID-2068BBA0-9026-48D0-9DEB-301BCB3C600C v2
Fundamental
2nd order to 5th order (0.1 - 0.5) X U
r
None
2nd order to 5th order (0.1 - 0.5) X U
None
2nd order to 5th order (0.1 - 0.5) X U
None
2nd order to 5th order (0.1 - 0.5) X U
2nd order to 5th order (0.1 - 0.5) X U
and U )
F H
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Range or value
Harmonic
1MRK 502 074-BEN M
± 50 mHz
F
± 0.5% of U
± 2% of U
F
± 0.5% of U
± 0.5% of U
F
± 2%
± 4% of U
F
± 4%
F
Accuracy
F
F
H
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