Omicron CT SB2 User Manual page 138

CT Analyzer User Manual
Parameters assessed for IEEE C57.13
Table 8-34: Parameters assessed for IEEE C57.13
Parameter Description
Class Accuracy class according to standard.
Δϕ
Phase deviation.
RCF Ratio correction factor.
RE @ Isn Current ratio error at secondary current I
RE @ Current ratio error at 20 times the secondary
20 * Isn current I
Vknee Knee point voltage.
Vk / Ik User-defined measuring point.
Vk1 / Ik1 User-defined measuring point 1.
Rct Secondary winding resistance.
Rprim Primary winding resistance
1. Acc. to IEEE C57.13 (2008)
136
.
sn
Parameter assessed for
IEEE C57.13
protection
CTs
1
C T X K
x x x x
.
x x x x
sn
x x x x
x
x x
x x
x
x x x x
IEEE
C57.13.6
meter. high
CTs accuracy
metering
CTs
0.3, 0.3S,
0.6, 1.2, 0.15, 0.15S
2.4, 4.8 0.15N
x x
x x
x x
x x
OMICRON