Tripping device of low-voltage vacuum circuit breaker

A technology of vacuum circuit breaker and tripping device, which is applied in the direction of high-voltage air circuit breaker, emergency protection device, circuit, etc., can solve the problem of vacuum circuit breaker being unable to cut off the fault circuit, and achieve the effect of preventing the further expansion of the accident.

Pending Publication Date: 2021-05-07
XIAMEN HONGFA ELECTRICAL SAFETY & CONTROLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The structural problem of the current vacuum circuit breaker: when the circuit is overloaded or short-circuited, the vacuum circuit breaker itself has no ability to cut off the faulty circuit, and can only rely on other protection components for circuit protection

Method used

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  • Tripping device of low-voltage vacuum circuit breaker
  • Tripping device of low-voltage vacuum circuit breaker
  • Tripping device of low-voltage vacuum circuit breaker

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Embodiment Construction

[0039] To further illustrate the various embodiments, the present invention is provided with accompanying drawings. These drawings are a part of the disclosure of the present invention, which are mainly used to illustrate the embodiments, and can be combined with related descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should understand other possible implementations and advantages of the present invention. Components in the figures are not drawn to scale, and similar component symbols are generally used to denote similar components. The directions described below are figure 1 as the benchmark.

[0040] see Figure 1 to Figure 17 , a tripping device for a low-voltage vacuum circuit breaker, including an electromagnet 100, a vacuum interrupter 600 and a tripping mechanism 200, the electromagnet 100 controls the contact or separation of the dynamic and static contacts in the va...

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Abstract

The invention discloses a tripping device of a low-voltage vacuum circuit breaker, and relates to the technical field of vacuum circuit breakers. The tripping device comprises an electromagnet, a vacuum arc-extinguishing chamber and a tripping mechanism; the electromagnet controls contact or separation of a movable contact and a static contact in the vacuum arc-extinguishing chamber to realize closing and opening, and the tripping mechanism is arranged between the electromagnet and the vacuum arc-extinguishing chamber and comprises a connecting rod assembly; the connecting rod assembly has a folded state and a relatively straight state, and the folded state and the relatively straight state of the connecting rod assembly correspond to the tripping state and the locking state of the tripping mechanism respectively. When overload or short circuit fault occurs in the circuit, the connecting rod assembly timely responds to be switched from the relatively straight state to the folded state so that the moving contact and the static contact in the vacuum arc-extinguishing chamber are separated and rapid tripping is realized. The tripping device of the low-voltage vacuum circuit breaker provided by the invention can cut off a fault circuit in time, realizes a protection function, sends out a fault alarm signal after tripping, notifies a user to maintain in time, and prevents an accident from further expanding.

Description

technical field [0001] The invention relates to the technical field of vacuum circuit breakers, in particular to a tripping device for a low-voltage vacuum circuit breaker. Background technique [0002] A vacuum circuit breaker currently on the market consists of a vacuum interrupter, a contact spring, a transmission assembly, a permanent magnet mechanism, a return spring, and an installation base. The action process is as follows: [0003] 1) After the permanent magnet mechanism is energized, the moving iron core and the static iron core are closed, driving the transmission assembly to move, thereby pushing the moving and static contacts of the vacuum interrupter to close, and at the same time, the contact spring is compressed to provide pressure for the contact, and the return spring is compressed energy storage. [0004] 2) When the permanent magnet mechanism loses power, the moving contact of the vacuum interrupter is separated from the static contact under the action ...

Claims

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Application Information

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IPC IPC(8): H01H71/40H01H71/58H01H71/04H01H33/66H01H33/666H01H33/38
CPCH01H33/38H01H33/66H01H33/666H01H71/04H01H71/405H01H71/58H01H2071/124
Inventor 林新德钟建艺刘磊董惠东郭友德张金泉
Owner XIAMEN HONGFA ELECTRICAL SAFETY & CONTROLS
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