CN201898105U

CN201898105U - Double-breakpoint movable contact terminal device of molded case circuit breaker

Info

Publication number: CN201898105U
Application number: CN2010206377051U
Authority: CN
Inventors: 孟祥睿; 张平
Original assignee: SHENYANG SIWO ELECTRICAL EQUIPMENT CO Ltd
Current assignee: SHENYANG SIWO ELECTRICAL EQUIPMENT CO Ltd
Priority date: 2010-12-01
Filing date: 2010-12-01
Publication date: 2011-07-13
Anticipated expiration: 2020-12-01

Abstract

The utility model relates to a double-breakpoint movable contact terminal device of a molded case circuit breaker, comprising a supporting member, and a movable contact terminal and a dual twisted spring, which are arranged inside the supporting member. The dual twisted spring is arranged inside a groove of the supporting member and is clamped on two ends of the movable contact terminal. The double-breakpoint movable contact terminal device of the molded case circuit breaker has a simple structure and low cost, is reliable to act, and has fewer components and high integral reliability. Through the accelerated rotating movement of the movable contact terminal, the increase of the short-circuited current can be restricted, i.e. a current limiting function can be realized.

Description

The trigger device of breaker of plastic casing double break point

Technical field: the utility model relates to a kind of moving contact system, especially a kind of double break crawl contact system that is applied on the circuit breaker.

Background technology: the present double break crawl contact system on circuit breaker, structure is very complicated, cost height, and reliability is low, closed again situation after might occurring disconnecting.

The utility model content: at above-mentioned the deficiencies in the prior art, it is a kind of simple in structure that the utility model provides, the trigger device of the breaker of plastic casing double break point that reliability is high.

For achieving the above object, the technical solution adopted in the utility model is: the trigger device of breaker of plastic casing double break point comprises supporter and is in supporter interior moving contact, torsion spring.Torsion spring is in the interior groove of supporter, and is stuck in the two ends of moving contact.

The utility model is simple in structure, and cost is low.Reliable in action, part is few, the global reliability height.Rely on the acceleration of moving contact self to rotatablely move, can the growth of short circuit current be provided constraints, i.e. metering function.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the perspective view of another angle of the utility model

Fig. 3 is the fundamental diagram of moving contact conducting state.

Fig. 4 is the fundamental diagram of moving contact off-state.

Embodiment:

As depicted in figs. 1 and 2: the trigger device of breaker of plastic casing double break point comprises supporter 2 and the moving contact 1, the torsion spring 3 that are in the supporter 2.Torsion spring 3 is in the groove in the supporter 2, and is stuck in the two ends of moving contact 1.

Operation principle:

When prospective short circuit current I flows through moving contact, between the contact-making surface of dynamic/static contact, produce electrodynamic repulsion force F, this repulsion F makes moving contact produce as shown in Figure 3, and direction rotatablely moves, when moving contact rotates through the dead point of torsion spring, moving contact is by the torsional moment of torsion spring, continue as shown in Figure 4, to open fully up to moving contact by original direction motion.

Claims

1. the trigger device of breaker of plastic casing double break point comprises supporter and is in supporter interior moving contact, torsion spring; Torsion spring is in the interior groove of supporter, and is stuck in the two ends of moving contact.