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Tripping device of moulded case circuit breaker

A circuit breaker and release technology, applied in the field of molded case circuit breaker release, can solve the problems of inconvenient use and complicated adjustment, and achieve the effects of high operability, accurate and reliable opening, and convenient adjustment.

Active Publication Date: 2013-10-02
ZHEJIANG ELECTRIC APPLIANCE & SWITCHGEAR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies and defects in the background technology, the present invention provides a molded case circuit breaker release, which mainly solves the problems of cumbersome adjustment and inconvenient use of the existing small current and overcurrent release.

Method used

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  • Tripping device of moulded case circuit breaker
  • Tripping device of moulded case circuit breaker
  • Tripping device of moulded case circuit breaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Depend on Figure 1-3 As shown, the molded case circuit breaker release includes a shaft sleeve 9, a coil 5 and an iron core 4. The shaft sleeve 9 is provided with an accommodating cavity 10 for the iron core 4 to slide axially. The coil 5, the shaft sleeve 9 and the iron core 4 are sequentially socketed from the outside to the inside. The two ends of the shaft sleeve 9 are respectively provided with a yoke 7 and a pull rod 1. A spring is elastically fitted between the yoke 7 and the iron core 4. 6. The pull rod 1 is connected to the iron core 4 with the screw 2, the sleeve 9 is provided with a limit ring 8 corresponding to the outer ring of the screw 2, and the screw 2 is corresponding to the iron core 4 and the limit ring 8 There is an adjusting nut 3 connected to the inter-thread transmission, and the sleeve 9 is provided with a matching positioning groove 91 that limits the circumferential rotation of the adjusting nut 3, and the adjusting nut can slide axially in t...

Embodiment 2

[0026] Depend on Figure 4 As shown in the molded case circuit breaker release, the screw rod 2 is provided with small-diameter threaded sections 14' distributed in steps, and the tie rod 1 is provided with a connecting hole 15 matching the small-diameter threaded section 14'. ’, the screw 2 penetrates the tie rod 1 through the small-diameter threaded section 14 ′ to form a clearance fit, and the screw 2 is threaded with a pressing nut 12 that is press-fitted with the tie rod 1 . Through the compression fit of the installation bracket to the limit ring, when debugging and maintenance are required, the limit ring can be easily disassembled by simply disassembling the installation bracket, and the spring or other parts can be adjusted and replaced. It has stable installation and convenient disassembly. , high operability effect. Other technical features are the same as those in Embodiment 1, and will not be repeated here.

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Abstract

The invention relates to a tripping device of a moulded case circuit breaker and mainly aims to solve the problem that low-current and over-current tripping devices are cumbersome to adjust and inconvenient to use. A pull rod (1) is connected with an iron core (4) with a screw (2); a spacing ring (8) is arranged on an axle sleeve (9) and corresponds to the outer ring of the screw (2); an adjusting screw nut (3) is in threaded transmission connection with the screw (2) and corresponds to a position between the iron core (4) and the spacing ring (8); a positioning groove (91) for preventing the adjusting screw nut (3) from rotating in the circumferential direction is arranged on the axle sleeve (9); the adjusting screw nut can slide axially in the positioning groove (91); a screwing part (13) is arranged at the end of the screw (2), which corresponds to the pull rod (1). The tripping device has the effects of convenience in adjustment and high operability.

Description

technical field [0001] The invention relates to a molded case circuit breaker, in particular to a tripper for a molded case circuit breaker. Background technique [0002] Molded case circuit breaker is an important protection device in the low-voltage power distribution system. It plays the role of connecting and breaking the normal working current in the low-voltage power distribution system, and automatically and quickly cut off the fault current when the circuit fails. Including contact arc extinguishing system, operating mechanism, controller, manual release device and release etc. [0003] The function of the release is to convert electrical energy into mechanical action, and make the molded case circuit breaker open when the trip signal is received. Traditional releases are divided into electronic releases and thermal magnetic releases, etc., which are generally installed inside the circuit breaker and cooperate with the drawbar of the molded case circuit breaker to r...

Claims

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Application Information

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IPC IPC(8): H01H71/24
Inventor 林开志王建民吴晓平
Owner ZHEJIANG ELECTRIC APPLIANCE & SWITCHGEAR