ABB REF 54 Series Technical Reference Manual page 35

1MRS750527-MUM
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Technical Reference Manual, General
• correction parameter for the phase displacement error of the voltage divider
1
(-1.0000°...1.0000°)
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• amplitude correction factor of general measurement
(-10000.00000...10000.00000)
• correction parameter for the offset correction of general measurement
(-10000.00000...10000.00000)
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:
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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)
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Amplitude error at voltage U
(e = error in per cent)
Phase displacement error at voltage U
(e = error in degrees)
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Amplitude error at the whole measuring range
(e = error in per cent)
Phase displacement error at the whole measuring
range (e = error in degrees)
1. Only included in the feeder terminal revisions of the Release 2.0 or later, refer to
section "Revision identification" on page 90. Note that this parameter can only be
set via the HMI or the Relay Setting Tool.
2. Only included in the feeder terminal revisions of the Release 2.0 or later.

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
5() B
35