| 摘要 |
<p>In a ground fault interrupter of the differential transformer type having a means for protection against a grounded neutral condition, which means is located on the supply side of the differential transformer, there is provided a test circuit branch connected between a first point on the load side of the differential transformer to the line conductor and on the supply side of the differential transformer to the neutral conductor. This arrangement provides the capability to test performance of the differential transformer and also the means for protection against the grounded neutral condition.</p> |
