It should show a routine test performed in 2009 year about CT-13.8kV. It's been a long time that the errors of protection CT shall not exceed 2%, far from the specified (10%).
15 (fifteen) Current Transformer,, 8000-5-5-5 A, 60Hz, 10B400, 10B400 and 0.3C50, 24kV, 110kV(BIL), 46.5kA(Isc).
1- Ratio 8000-5 , Rated burden 100VA , protection core
- 1.0 * I secondary rated , Maximum Current Error: -0.68 %
- 20.0 * I secondary rated , Maximum Current Error: 1.135%
2- Ratio 8000-5 , Rated burden 50VA , metering core
- 1.0 * I secondary rated , Maximum Current Error: 0.02 %
- 0.1 * I secondary rated , Maximum Current Error: -0.25%