Auxiliary arc extinguishing device of alternating current contactor
The utility model discloses an auxiliary arc extinguishing device of an alternating current contactor, which comprises the alternating current contactor and an intermediate relay, a coil of the alternating current contactor is connected with a coil of the intermediate relay in parallel, and each pha...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The utility model discloses an auxiliary arc extinguishing device of an alternating current contactor, which comprises the alternating current contactor and an intermediate relay, a coil of the alternating current contactor is connected with a coil of the intermediate relay in parallel, and each phase of a three-phase normally open main contact of the alternating current contactor is respectively provided with a bypass arc extinguishing branch. The device comprises a first one-way silicon controlled rectifier, a second one-way silicon controlled rectifier and a current-limiting fuse resistor, the first one-way silicon controlled rectifier and the second one-way silicon controlled rectifier are reversely connected in parallel, and the current-limiting fuse resistor is connected in series with the first one-way silicon controlled rectifier and the second one-way silicon controlled rectifier and then connected to two ends of a normally-open main contact of the alternating-current contactor. A normally-open auxil |
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