| 摘要 |
The cutoff apparatus, of the remote breaker and/or contactor type, includes an auxiliary circuit 40, 42, 44 arranged between the control electrode of the static switch governing the electromagnet 36 and the output of an electronic control circuit producing a control command A synchronised with one of the phases of the network. This auxiliary circuit provides a control pulse C exhibiting a random phase shift with respect to the synchronised control command A. This makes it possible to obtain virtually equal wear of the various poles. <IMAGE>
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