| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a small, light, and stable device for an instrument transformer capable of easily and externally setting a rated second current, burden capacity, burden power factors, and so on, during error measurement of the instrument transformer. SOLUTION: An impedance component setting device 5, a burden current detector CT0 , and a power amplifier 15 are connected to a burden circuit A, and an impedance is variably set by the setting data D1 and D2 of CPU calculated from a set condition, and a reference voltage vector es is generated by making reference to an indicated data of CPU based on a phase conversion voltage of the current detector CT0 , and the difference voltage eg between the reference voltage vector es and the proportional voltage ex , 1/K of a burden voltage, is entered the power amplifier 15 which automatically compensates the difference of the set impedance.</p> |
