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

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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 i

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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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