ABB REF 54 Series Technical Reference Manual, General page 41

1MRS750527-MUM Feeder Terminal
Technical Reference Manual, General
The measurement values stated by the manufacturer of the measuring device are
used for calculating the correction parameters and factors according to the following
formulas:
Current transformers
Amplitude error at current I
(e = error in per cent)
Amplitude error at current 0.01 x I
(e = error in per cent)
Phase displacement error at current I
(e = error in degrees)
Phase displacement error at current 0.01 x I
(e = error in degrees)
Voltage transformers
Amplitude error at voltage U
(e = error in per cent)
Phase displacement error at voltage U
(e = error in degrees)
Rogowski coil
Amplitude error at the whole measuring range
(e = error in per cent)
Phase displacement error at the whole measuring
range (e = error in degrees)
Voltage divider
Amplitude error at the whole measuring range
(e = error in per cent)
Phase displacement error at the whole measuring
range (e = error in degrees)
Amplitude correction factor 1
n
= 1 / (1+ e/100)
Amplitude correction factor 2
n
= 1 / (1+ e/100)
Phase displacement error 1 = - e
n
Phase displacement error 2 = - e
n
Amplitude correction factor
n
= 1 / (1+ e/100)
Phase displacement error = - e
n
Amplitude correction factor
= 1 / (1+ e/100)
Phase displacement error = - e
Amplitude correction factor
= 1 / (1+ e/100)
Phase displacement error = - e
REF 54_
41