Double-breakpoint molded case circuit breaker

A molded case circuit breaker, double breakpoint technology, applied to circuit breaker components, circuit breaker contacts, protection switch operation/release mechanism, etc., can solve the problem of large lateral width of the circuit breaker, affecting product use, etc.

Inactive Publication Date: 2015-04-08
SHANGHAI ELECTRICAL APP RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention patent with the patent number ZL200410000924.8 discloses a modular multi-pole double-breakpoint molded case circuit breaker. Two pairs of moving and static contacts share the breaking current, so the breaking capacity is greatly improved. In theory, its breaking capacity is twice that of the single break point contact device. However, this structure makes the lateral width of the circuit breaker relatively large, which affects the use of the product.

Method used

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  • Double-breakpoint molded case circuit breaker
  • Double-breakpoint molded case circuit breaker
  • Double-breakpoint molded case circuit breaker

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Embodiment Construction

[0018] In order to make the present invention more comprehensible, preferred embodiments are described in detail below with accompanying drawings.

[0019] combine Figure 1 to Figure 5 , a double-breakpoint molded case circuit breaker provided by the present invention includes an insulating housing 1, an operating mechanism 5 is set in the housing 1, and two rotating shafts 6 are located below the operating mechanism 5 and are stuck in the housing 1. corresponding to the circular groove.

[0020] In the position corresponding to each pole of the rotating shaft 6, a tail portion of a single-pole double-breakpoint moving contact rod mechanism is respectively arranged, and each single-pole double-breakpoint moving contact rod mechanism corresponds to one pole respectively. Each single-pole double-break point moving contact rod mechanism includes a moving contact rod 3, and the moving contact rod 3 is connected and fixed by two single-break point moving contact rods to form a se...

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Abstract

The invention relates to a double-breakpoint molded case circuit breaker which is a molded case circuit breaker with double breakpoints connected in series in the same direction. A double-breakpoint contact structure of the molded case circuit breaker is of a double-breakpoint structure in which movable contact rods of two single breakpoints are connected in series to form a pole; the breaker of the structure has the advantages of reliable contact, high electric stability and easiness in regulation of contact parameters of a single-breakpoint breaker, also has the advantage of good arc extinguishment effect of the double-breakpoint breaker and is simple, reasonable in structure and capable of effectively improving the short circuit breaking capability of the molded case circuit breaker. According to the double-breakpoint molded case circuit breaker disclosed by the invention, when the breaker is subjected to short circuit breaking, the arc extinguishment capability of the double-breakpoint structure is theoretically double that of the single-breakpoint structure, and the double-breakpoint structure is beneficial for improving the short circuit breaking capability of the breaker.

Description

technical field [0001] The invention relates to a plastic case circuit breaker with double breakpoints, belonging to the technical field of low-voltage electrical appliances. Background technique [0002] Molded case circuit breakers are capable of connecting, carrying and breaking currents under normal circuit conditions, and can also be connected, carried for a certain period of time and A switching device for breaking current. [0003] Usually, the contact system of molded case circuit breakers adopts a single breakpoint structure, which has the advantages of reliable contact, high electrical stability, and easy adjustment of contact parameters. However, when it breaks the short-circuit current, the burning and wear of the contacts are very serious. As a result, the single-break point contact system molded case circuit breaker has very limited ability to improve short-circuit breaking. At present, the molded case circuit breaker has a contact system with a double breakp...

Claims

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Application Information

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IPC IPC(8): H01H71/10H01H73/04
CPCH01H71/10H01H73/04
Inventor 沈海鹰张莹莹王智勇许太军杨程王静绮
Owner SHANGHAI ELECTRICAL APP RES INST
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