Energy-saving alternating-current contactor with fault clearing lock

An AC contactor, contactor technology, applied in relays, electromagnetic relays, electromagnetic relay details and other directions

Inactive Publication Date: 2013-10-16
张汉全
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of its defects is that the contactor coil consumes electric energy. According to estimates, the country loses more than 70 billion kilowatt-hours of electric energy every year for this reason; the second defect is that the contactor coil is charged for a long time, and the coil is easily burned and damaged. Frequent replacement and maintenance consumes a lot of manpower and resources. In addition, when the circuit has a short circuit, open fault, etc., the existing AC contactor itself will not automatically disconnect and lacks automatic protection functions.

Method used

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  • Energy-saving alternating-current contactor with fault clearing lock
  • Energy-saving alternating-current contactor with fault clearing lock
  • Energy-saving alternating-current contactor with fault clearing lock

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 As shown, the chevron-shaped static iron core 2 with the contactor coil KM1 facing upward is fixed on the support plate 5. The support spring 6 makes the moving iron core 1 above the static iron core 2, and the three-phase moving contact Q 1 , Q 2 , Q 3 The rod body of the lock hook 3 is fixed at the center of the lower part of the movable iron core 1, and the rod body passes through the center hole of the static iron core 2 and the through hole on the supporting plate 5 to support An anti-failure lock 4 is installed under the plate 5, and the head of the tongue rod 41 of the anti-failure lock 4 is close to the center line of the iron hook 3.

[0038] The structure of the mechanical part of the lock 4 is as follows: the lock tongue 41 and the ball 42 are installed in the slot core hole in the front of the lock body 40, and the connecting rod 43 in the middle cavity of the lock body 40 is sleeved with a return spring 44, and the front end of the connecting r...

Embodiment 2

[0041] This embodiment is basically the same as Example 1, except that the electrical part of the fault lock 4 is structured as Figure 5 As shown, it is exactly the same as the second technical solution described above, and will not be repeated here.

Embodiment 3

[0043] Such as figure 2 As shown, the chevron-shaped static iron core 2 with the contactor coil KM1 opens to one side and is fixed on the support plate 5. The moving iron core 1 and the static iron core 2 are hinged at the inner lower end of each other, and the three-phase moving contact Q 1 , Q 2 , Q 3 It is integrated with the moving iron core 1 in a linkage mode. The shaft of the lock hook 3 is fixed above the moving iron core 1, the fault-removing lock 4 is fixed above the static iron core 2, and the head of the bolt 41 of the fault-removing lock is close to A support spring 6 is installed between the moving and static iron cores on the center line of the lock hook 3 in a horizontal state. In this embodiment, except for the failure, the structure of the lock 4 is exactly the same as in Example 1.

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PUM

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Abstract

The invention relates to an energy-saving alternating-current contactor with a fault clearing lock. A lock hook is fixedly mounted on a moving iron core; the fault clearing lock is mounted below or above a static iron core; and the head of a lock tongue stem of the fault clearing lock is adjacent to a center line of the lock hook. A connecting rod on which a reset spring is sleeved is arranged in a lock body, the front end of the connecting rod is fixedly connected with a lock tongue stem baffle, and the rear end of the connecting rod is fixedly connected with an iron absorption plate; an unlocking coil and an iron core are mounted in a rear cavity of the lock body; and the unlocking coil is connected with an open-phase and short-circuit fault automatic clearing circuit. The invention has the characteristics that the mechanical self-locking of the three-phase moving contact can be realized, so that the coil of the contactor is uncharged during the normal operation to prolong the service life of the coil of the contactor and save the electric energy and the resources; when the faults of open phase and short circuit exist in an electric line, a switch is automatically closed to power off, so that the economic benefit and the social benefit are huge.

Description

technical field [0001] The invention relates to an electrical switchgear for controlling the switching on and off of a three-phase circuit or a three-phase electrical appliance, in particular to an automatic protection switchgear capable of automatically clearing open-phase and short-circuit faults. Background technique [0002] In various existing three-phase circuits, relay self-locking devices are used. When the start button switch is pressed and then disconnected, the self-locking device continues to keep the contactor coil energized to ensure that the three-phase moving contacts of the AC contactor are in a closed state. That is, the contactor coil must be energized for proper operation. One of its defects is that the contactor coil consumes electric energy. According to estimates, the country loses more than 70 billion kilowatt-hours of electric energy every year for this reason; the second defect is that the contactor coil is charged for a long time, and the coil is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H50/16H01H50/64
Inventor 张汉全
Owner 张汉全
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