ABB REF 545 - Page 41

1MRS750527-MUM
REF 54_
41
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
Voltage transformers
Rogowski coil
Voltage divider
Amplitude error at current I
n
(e = error in per cent)
Amplitude correction factor 1
= 1 / (1+ e/100)
Amplitude error at current 0.01 x I
n
(e = error in per cent)
Amplitude correction factor 2
= 1 / (1+ e/100)
Phase displacement error at current I
n
(e = error in degrees)
Phase displacement error 1 = - e
Phase displacement error at current 0.01 x I
n
(e = error in degrees)
Phase displacement error 2 = - e
Amplitude error at voltage U
n
(e = error in per cent)
Amplitude correction factor
= 1 / (1+ e/100)
Phase displacement error at voltage U
n
(e = error in degrees)
Phase displacement error = - e
Amplitude error at the whole measuring range
(e = error in per cent)
Amplitude correction factor
= 1 / (1+ e/100)
Phase displacement error at the whole measuring
range (e = error in degrees)
Phase displacement error = - e
Amplitude error at the whole measuring range
(e = error in per cent)
Amplitude correction factor
= 1 / (1+ e/100)
Phase displacement error at the whole measuring
range (e = error in degrees)
Phase displacement error = - e