| 摘要 |
FIELD: electricity.SUBSTANCE: invention relates to devices of ground short-circuit detection in AC electric circuit, containing the electrical machine and neutral point. The device contains the signal feeding unit (20), voltage transformer (30) having a primary winding (31), connected to the side of leads (13) of the electrical machine, and a secondary winding (32), connected by an open delta circuit. An instrument transformer (40, 45), with a primary winding (48), connected to a neutral point (14) of the electrical machine, and a secondary winding (49). The ground short-circuit detection unit (50). The signal feeding unit (20) is configured with a possibility of feeding a signal to the secondary winding (32) of the voltage transformer (30). The instrument transformer (40, 45) is configured with a possibility of measuring of the resulting fed signal to its secondary winding (49), and the ground short-circuit detection unit (50) is configured with a possibility of detection of the ground short-circuit using the measured signal.EFFECT: simplification of device design.10 cl, 3 dwg |
