CN209896002U - Plastic case circuit breaker - Google Patents

Abstract

The utility model relates to a moulded case circuit breaker, including base, well lid, upper cover, intelligent control circuit board, operating device, moving contact, static contact, automatic divide-shut brake mechanism, electrically conductive system includes that A looks electrically conductive copper bar, B looks electrically conductive copper bar, C looks electrically conductive copper bar, N looks electrically conductive copper bar, three current transformer, A looks electrically conductive copper bar, B looks electrically conductive copper bar, be provided with the portion of bending that is the Z type on the C looks electrically conductive copper bar respectively, three current transformer suit is respectively in the portion of bending of A looks electrically conductive copper bar, B looks electrically conductive copper bar, C looks electrically conductive copper bar, each current transformer includes the suit in the portion of bending iron core, two coil winding, the iron core be the square frame form, two coil winding symmetries set up on the iron core. The utility model has the advantages of simple structure, safe and reliable performance and small volume.

Description

Plastic case circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus technical field, concretely relates to moulded case circuit breaker.

Background

The molded case circuit breaker can play a real-time protection role on a power supply circuit and mechanical equipment, and can automatically cut off a circuit when the circuit and the equipment are overloaded or short-circuited and have undervoltage faults. At present, a driven plastic shell type circuit breaker can only be manually switched on, namely, a handle of the manual switching-on circuit breaker is used, and if electric arcs exist in the circuit breaker or flashover exists, the operation safety of technical personnel can be threatened. Therefore, the plastic shell type circuit breaker is provided with the electric operating device, so that the automatic opening and closing function of the plastic shell type circuit breaker is realized, the operation is flexible, the use is convenient, and the safety and the reliability are realized. The molded case circuit breaker comprises a shell, an operating mechanism, a conductive system and an automatic switching-on/off mechanism, the structural design of the conductive system of the existing molded case circuit breaker is unreasonable, and the conductive system occupies a larger internal space of the circuit breaker, so that the molded case circuit breaker has the defects of large volume and unreliable performance

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a simple structure, performance safe and reliable, small moulded case circuit breaker.

In order to achieve the above object, the present invention provides a molded case circuit breaker, comprising a base, a middle cover, an upper cover, an intelligent control circuit board, an operating mechanism, moving contacts, static contacts, an automatic switching mechanism, and a conductive system disposed in the base, wherein the conductive system comprises an a-phase conductive copper bar, a B-phase conductive copper bar, a C-phase conductive copper bar, an N-phase conductive copper bar, and three current transformers, the a-phase conductive copper bar, the B-phase conductive copper bar, and the C-phase conductive copper bar have the same structure, one end of the a-phase conductive copper bar, the B-phase conductive copper bar, and the C-phase conductive copper bar are respectively connected to the three moving contacts, the other end of the a-phase conductive copper bar, the B-phase conductive copper bar, and the C-phase conductive copper bar are respectively connected to three connecting terminals, and the a-phase conductive copper bar, the B-phase conductive copper bar, and, the three current transformer suit respectively on the portion of bending of A looks conductive copper bar, B looks conductive copper bar, C looks conductive copper bar, each current transformer include the suit iron core, two coil winding in the portion of bending, the iron core be the square frame form, two coil winding symmetries set up on the iron core.

The beneficial effect of above-mentioned structure is: the three current transformers are arranged on the A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar in a horizontal structure, the overall height of the current transformers is effectively shortened, and the space occupied by the current transformers is reduced, so that the size of the molded case circuit breaker is effectively reduced. And the A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar are more reasonable in layout, so that the working reliability of the molded case circuit breaker is ensured, and the molded case circuit breaker has the advantages of simple structure, safe and reliable performance and small size.

Particularly, the base on correspond the department of bending of A looks conductive copper bar, B looks conductive copper bar, C looks conductive copper bar and be provided with the joint groove respectively, the block of the portion of bending in the joint inslot, and constitute the joint cooperation of base and A looks conductive copper bar, B looks conductive copper bar, C looks conductive copper bar. The base is internally provided with a clamping groove which is clamped with the bending parts of the A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar, so that the A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar can be conveniently assembled with the base.

Particularly, one end of each of the A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar is respectively connected to three conductive sheets, the three conductive sheets are respectively fixed in the base through screws, and the three moving contacts are respectively and rotatably connected to the conductive sheets. The A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar are connected with the moving contact through the conductive strips, so that the reliability of electric connection is ensured.

Drawings

Fig. 1 is an exploded view of an embodiment of the present invention.

Fig. 2 is a cross-sectional view of an embodiment of the present invention.

Fig. 3 is a perspective view of a conductive system according to an embodiment of the present invention.

Detailed Description

As shown in fig. 1-3, an embodiment of the present invention is a molded case circuit breaker, including base 10, middle cover 11, upper cover 12, intelligent control circuit board 13, operating mechanism 14, moving contact 15, static contact 16, automatic opening and closing mechanism 17, conductive system 20 arranged in base 10, conductive system 20 include a phase a conductive copper bar 21, a phase B conductive copper bar 22, a phase C conductive copper bar 23, a phase N conductive copper bar 24, and a three current transformer 25, phase a conductive copper bar 21, phase B conductive copper bar 22, and phase C conductive copper bar 23 have the same structure, one end of phase a conductive copper bar 21, phase B conductive copper bar 22, and phase C conductive copper bar 23 is connected to three moving contact 15, the other end of phase a conductive copper bar 21, phase B conductive copper bar 22, and phase C conductive copper bar 23 is connected to three connecting terminal 26, phase a conductive copper bar 21, phase B conductive copper bar 22, and phase C conductive copper bar 23, and the other end of phase a, Be provided with one respectively on B looks conductive copper bar 22, the C looks conductive copper bar 23 and be the portion 200 of bending of Z type, three current transformer 25 suit respectively on the portion 200 of bending of A looks conductive copper bar 21, B looks conductive copper bar 22, C looks conductive copper bar 23, each current transformer 25 including the suit iron core 251, two coil winding 252 on the portion 200 of bending, iron core 251 be the square frame form, two coil winding 252 symmetry set up on iron core 251. The base 10 on correspond a portion 200 punishment of bending of a looks copper bar 21, B looks copper bar 22, C looks copper bar 23 and be provided with joint groove 101 respectively, the portion 200 block of bending in joint groove 101, and constitute the joint cooperation of base 10 and A looks copper bar 21, B looks copper bar 22, C looks copper bar 23. The base is internally provided with a clamping groove which is clamped with the bending parts of the A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar, so that the A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar can be conveniently assembled with the base. One end of the a-phase conductive copper bar 21, one end of the B-phase conductive copper bar 22 and one end of the C-phase conductive copper bar 23 are respectively connected to three conductive plates 27, the three conductive plates 27 are respectively fixed in the base 10 through screws, and the three movable contacts 15 are respectively rotatably connected to the conductive plates 27. The A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar are connected with the moving contact through the conductive strips, so that the reliability of electric connection is ensured.

The three current transformers are arranged on the A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar in a horizontal structure, the overall height of the current transformers is effectively shortened, and the space occupied by the current transformers is reduced, so that the size of the molded case circuit breaker is effectively reduced. And the A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar are more reasonable in layout, so that the working reliability of the molded case circuit breaker is ensured, and the molded case circuit breaker has the advantages of simple structure, safe and reliable performance and small size.

Claims (3)

1. The utility model provides a moulded case circuit breaker, includes base, well lid, upper cover, intelligent control circuit board, operating device, moving contact, static contact, automatic divide-shut brake mechanism, sets up the electrically conductive system in the base, its characterized in that: the conductive system comprises an A-phase conductive copper bar, a B-phase conductive copper bar, a C-phase conductive copper bar, an N-phase conductive copper bar and three current transformers, wherein the A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar have the same structure, one ends of the A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar are respectively connected to three movable contacts, the other ends of the A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar are respectively connected to three wiring terminals, Z-shaped bent parts are respectively arranged on the A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar, the three current transformers are respectively sleeved on the bent parts of the A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar, each current transformer comprises an iron core and two coil windings sleeved on the bent, the two coil windings are symmetrically arranged on the iron core.

2. The molded case circuit breaker according to claim 1, wherein: the base on correspond the department of bending of A looks conductive copper bar, B looks conductive copper bar, C looks conductive copper bar and be provided with the joint groove respectively, the block of the portion of bending in the joint inslot, and constitute the joint cooperation of base and A looks conductive copper bar, B looks conductive copper bar, C looks conductive copper bar.

3. A molded case circuit breaker according to claim 1 or 2, characterized in that: one end of the A-phase conductive copper bar, one end of the B-phase conductive copper bar and one end of the C-phase conductive copper bar are respectively connected to three conductive sheets, the three conductive sheets are respectively fixed in the base through screws, and the three moving contacts are respectively and rotatably connected to the conductive sheets.

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