| 摘要 |
<p>PCT No. PCT/SE96/00762 Sec. 371 Date Mar. 2, 1998 Sec. 102(e) Date Mar. 2, 1998 PCT Filed Jun. 12, 1996 PCT Pub. No. WO96/42098 PCT Pub. Date Dec. 27, 1996Switching equipment with a contactor (CE) and a circuit breaker (BR) located ahead of the contactor. For detection of welded-together contacts of the contactor, this is provided with means (SC) adapted, a certain time after an opening order to the contactor, to apply a voltage pulse to the operating coil (12) of the contactor and to compare the current response of the operating coil with a comparison level for forming a detection signal (sd), which is supplied to the circuit breaker. Upon detection of welded-together contacts, the detection signal triggers an opening of the circuit breaker for disconnection of the contactor.</p> |
