| 摘要 |
PROBLEM TO BE SOLVED: To test an overcurrent interrupting function of a circuit breaker, in a state with the supply of a load current maintained. SOLUTION: The uninterruptible testing device 1 for testing the overcurrent interrupting function of the circuit breaker 2 disposed between a distribution line PL and a load 3 includes a low-voltage, large-current insulation-type power supply 11 supplying a test current dt, a voltage detecting means 12 detecting the voltage by the low-voltage, large-current insulation-type power supply 11, a power supply cut-off means 13 for cutting off the low-voltage, a large-current insulation-type power supply 11, when the voltage detected by the voltage detecting means 12 exceeds a predetermined voltage, a switching means 14 for switching the connection between the circuit breaker 2 and the low-voltage, large-current insulation-type power supply 11, and a bypass circuit 15 for supplying the load current d to the load 3, connected to the circuit breaker 2 from the distribution line Pl when the circuit breaker 2 is cut off with the test current dt. COPYRIGHT: (C)2011,JPO&INPIT |
