采用高压加压法校核电压互感器(放电线圈)变比

Verifying the voltage ratio of voltage transformer (discharge coil) by method of adding the high voltage

电压互感器(放电线圈)的基本工作原理与变压器相似。电压互感器(放电线圈)将高电压变为低电压,以供测量和保护等二次设备使用。电压互感器(放电线圈)如在运行中出现故障,或测量不准确,将会造成保护跳闸,影响电网的安全稳定。因此,应当重视电压互感器(放电线圈)的试验检查,特别是对异常的电压互感器(放电线圈)应当采取高压加压法进行变比校核。

The basic principle of the voltage transformer （discharge coil） is similar to the transformer. The voltage transformer changes the high voltage into low voltage for the measuring and protecting secondary circuit equipment. If the voltage transformer （discharge coil） fails in the operation, or the measurement is not accurate, will cause the relay trip and influence power network＇s safety and stability, Thus the test and check of voltage transformer should be emphasized. Especially for the abnormal voltage transformer should be verified voltage ratio by method of adding the high voltage.