METHOD FOR CHECK OF SCALE VOLTAGE TRANSFORMERS

摘要

The invention relates to electric measuring equipment. Method for verification of scale transformers of voltages includes leveling potentials of outputs of supplementary and being checked scale voltage transformers through change of voltage of low voltage power source of scale voltage transformer being checked at equality of potentials on high-voltage inputs of both scale voltage transformers. Twice one performs measurements of voltages in arbitrary sequence, in particular between “zero” outputs of scale voltage transformers at equality of potentials at low-voltage outputs and between low-voltage outputs of scale voltage transformers at equality of potentials on “zero” outputs. By results one evaluates metrological characteristics of scale voltage transformer being verified. The method provides verification with keeping high accuracy of measurements without use of standard scale transformer of electric voltage.