Alternating-current double-power switching device capable of providing overcurrent protection in case of short circuit of external circuit

Abstract

The invention relates to the technical field of alternating-current double-power switching devices, and discloses an alternating-current double-power switching device capable of providing over-current protection when an external circuit is short-circuited. The alternating-current double-power switching device comprises a positioning frame, sliding blocks are slidably connected to two sides of the positioning frame, and a rotating handle is rotatably connected to the middle of the front end of each sliding block. Symmetrical limiting strips are fixedly connected to the upper side and the lower side of the rotating handle, an abutting column extending to the rotating handle is rotationally connected to the side, close to the middle of the positioning frame, of the front end of the sliding block, and limiting columns are fixedly connected to the two sides of the limiting strips on the lower portion of the front end of the sliding block. According to the alternating-current double-current switching device capable of providing overcurrent protection when the external circuit is short-circuited, current in the electromagnetic plates on the two sides is too large, so that the electromagnetic plates attract each other to enable the rotating handle to perform circuit switching, and during the period, the piston rod and the flow guide pipe are matched to relatively move to output airflow for arc extinguishing; therefore, reliable over-current protection can be effectively carried out when an external circuit is short-circuited, and early warning and reminding are carried out on a user for emergency processing.

Description

technical field [0001] The invention relates to the technical field of an AC double-power switching device, in particular to an AC double-power switching device that can provide overcurrent protection when an external circuit is short-circuited. Background technique [0002] At present, during the use of the AC dual-power switching device in the corresponding power distribution equipment, excessive current will often appear in the entire line due to the short circuit of the external circuit, causing the corresponding switch conversion mechanism to fail to work normally. The corresponding line and The problem of burnt-out equipment at the connection end has led to potential safety hazards. In addition, when the circuit is short-circuited, the user cannot get an early warning reminder, which in turn leads to the inability to effectively respond to emergencies, resulting in economic losses. [0003] Aiming at the deficiencies of the prior art, the present invention provides an ...

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Problems solved by technology

[0002] At present, during the use of the AC dual-power switching device in the corresponding power distribution equipment, excessive current will often appear in the entire line due to the short circuit of the external circuit, causing the corresponding switch conversion mechanism to fail to work normally. The corresponding line and The problem of burning out the equipment at the connection end and causing potential safety hazards. In addition, when the circuit is short-circuited, the user cannot get the first warning reminder, which leads to the inability to effectively deal with the emergency, resulting in economic losses.

[0003] Aiming at the deficiencies of the prior art, the present invention provides an AC dual-power switching device that can provide overcurrent protection when the external circuit is short-circuited. The advantages of early warning and reminder for emergency treatment solve the problem that the general AC dual-power switching device cannot perform reliable overcurrent protection when the external circuit is short-circuited during use, and cannot provide early warning and reminder for users for emergency treatment.

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