| Title |
A Study on Usefulness Verification Technique of the Measurement System by the Difference Between Caculated and Experimental Values of Ratio Error/phase Annie Error in Current Transformer |
| Keywords |
Current transformer ; Ratio error ; Phase angle error ; Burden ; National standard |
| Abstract |
A current transformer(CT) used for the estabilishment of high current national standard, has generally very small ratio error and phase angle error. Both the errors of CT depend critically on the external burden used. When both the ratio and phase angle errors at two different burdens including zero burden are known, those at any other burdens are calculated theoretically. The theoretical values are well consistent with the experimental results within the 82×10-6, implying the measurement system of CT in KRISS is well maintained. |