CN220306200U - Tripping device of circuit breaker - Google Patents

Abstract

The utility model discloses a tripping device of a circuit breaker, and relates to the technical field of circuit breaker equipment. The utility model comprises an insulating plastic shell, wherein the right side of the inner top of the insulating plastic shell is fixedly connected with a first wiring terminal, a magnetic release is fixedly connected to the middle position of the inner top of the insulating plastic shell near the top, a first contact is arranged below the magnetic release in the insulating plastic shell, a brake separating spring is arranged on the first contact, a thermal release is arranged below the first contact in the insulating plastic shell, a second contact is arranged near the bottom of the insulating plastic shell, a second wiring terminal is fixedly connected to the inner bottom of the insulating plastic shell, one end of the second wiring terminal is provided with a wire temperature detection device, and the wire temperature detection device consists of a cable, a thermistor, a fixing piece and a metal ring. The utility model adopts a thermomagnetic tripping device to provide two-stage protection, and the typical characteristic of short circuit and overload of equipment is heating, the temperature of a line or a connection point is monitored by using wire temperature detection, and the device is arranged at the positions of a cable joint, a terminal, a key heating component and the like.

Description

Tripping device of circuit breaker

Technical Field

The utility model relates to the technical field of circuit breaker equipment, in particular to a tripping device of a circuit breaker.

Background

The circuit breaker equipment is a circuit protection device, and is mainly used for switching on or off a circuit, and has the functions of protecting and controlling the circuit breaker in a power system, wherein the basic requirement of the power system on the circuit breaker is that the circuit breaker has enough switching-on and switching-off capability and as short as possible, the circuit breaker generally comprises a contact system, an arc extinguishing device, a transmission mechanism, a tripping device, a base frame, a shell and the like, when the circuit breaker is put into operation, an operating handle enables a main contact to be closed, a free tripping mechanism locks the main contact at a closed position, and various trippers enter an operation state.

Workers engaged in the installation of circuit breaker equipment find that some circuit breaker equipment cannot be detected when the temperature of a line or a connection point is abnormal in the working process, so that the trip device is influenced by temperature environment factors, and in order to solve the problem, a person skilled in the art provides a circuit breaker trip device.

Disclosure of Invention

The utility model adopts the following technical scheme for realizing the purposes:

the utility model provides a circuit breaker trip gear, includes insulating moulded case, top right side position fixedly connected with first binding post in the insulating moulded case, it is connected with the magnetic release to lean on top intermediate position fixedly connected with in the insulating moulded case, it is connected with operating handle to lean on top right side position rotation in the insulating moulded case, it is equipped with first contact to lie in magnetic release below in the insulating moulded case, be equipped with the brake separating spring on the first contact, lie in first contact below in the insulating moulded case and be equipped with the thermal release, it is equipped with the second contact to lean on the bottom position in the insulating moulded case, bottom fixedly connected with second binding post in the insulating moulded case, second binding post one end is equipped with wire temperature detection equipment, wire temperature detection equipment comprises cable, thermistor, mounting and metal ring.

Further, one end of the first contact is fixedly connected with the operating handle.

Further, an operating mechanism is arranged between the first contact and the second contact.

Further, an arc-extinguishing chamber is fixedly connected to the left side in the insulating plastic shell.

Further, the cable is electrically connected with the second wiring terminal, and the thermistor is electrically connected with the metal ring.

Further, the thermistor is mounted on the cable by a fixing member.

The beneficial effects of the utility model are as follows:

the utility model adopts the thermomagnetic tripping device to provide two-stage protection, namely magnetic protection and thermal protection, and the typical characteristic of short circuit and overload of equipment is heating, the temperature of a line or a connecting point can be monitored by using wire temperature detection, the temperature parameter change in the protected line can be detected, and a detector can be arranged at the positions of a cable joint, a terminal, a key heating part and the like.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic perspective view of the operating mechanism and the contact mechanism of the present utility model;

fig. 3 is a schematic perspective view of a wire temperature detecting device according to the present utility model.

Reference numerals: 1. insulating plastic shell; 2. a first connection terminal; 3. a magnetic release; 4. an operation handle; 5. a first contact; 6. a brake separating spring; 7. a thermal trip; 8. an operating mechanism; 9. a second contact; 10. a second connection terminal; 11. a wire temperature detection device; 1101. a cable; 1102. a thermistor; 1103. a fixing member; 1104. a metal ring; 12. an arc extinguishing cover.

Description of the embodiments

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

The application provides a circuit breaker trip gear, mainly used solves: in the working process of some breaker devices, the problem that the trip device is affected by temperature environmental factors because the circuit or the connection point cannot be detected when the temperature of the circuit or the connection point is abnormal is solved, and the following technical schemes are provided, and the following detailed description will be given with reference to fig. 1-3:

the utility model provides a circuit breaker trip gear, including insulating moulded case 1, top right side position fixedly connected with first binding post 2 in the insulating moulded case 1, it is connected with magnetic release 3 to lean on top intermediate position fixedly connected with in the insulating moulded case 1, it is connected with operating handle 4 to lean on top right side position rotation in the insulating moulded case 1, it is equipped with first contact 5 to lie in magnetic release 3 below in the insulating moulded case 1, be equipped with separating brake spring 6 on the first contact 5, it is equipped with thermal release 7 to lie in first contact 5 below in the insulating moulded case 1, it is equipped with second contact 9 to lean on the bottom position in the insulating moulded case 1, the bottom fixedly connected with second binding post 10 in the insulating moulded case 1, second binding post 10 one end is equipped with wire temperature detection equipment 11, wire temperature detection equipment 11 comprises cable 1101, thermistor 1102, mounting 1103 and metal ring 1104. In some embodiments: a thermo-magnetic trip device is used to provide magnetic and thermal protection.

The working principle here is: the thermal protection, namely overload protection, is carried out through the thermal trip 7, when current passes through the thermal trip 7, the thermal element heats (directly heated current passes through the bimetallic strip), the bimetallic strip is deformed by heat, and when the bimetallic strip is deformed to a certain degree, the traction rod is hit, so that the operating mechanism 8 is driven to act to cut off the circuit; the magnetic release 3 is actually a magnetic circuit. When normal current passes through the circuit, electromagnetic force generated by the electromagnet is smaller than the tensile force of the spring to form a reaction force, the armature cannot be attracted by the electromagnet, and the circuit breaker normally operates; when a short circuit fault occurs in a circuit, the current exceeds a plurality of times of the normal current, the electromagnetic force generated by the electromagnet is larger than the reaction force of the spring, the armature is attracted by the electromagnet, the free tripping mechanism is pushed by the transmission mechanism to release the first contact 5, and the first contact 5 is separated from the cut-off circuit under the action of the opening spring 6 to play a short circuit protection role.

As shown in fig. 1 and 2, in some embodiments, one end of the first contact 5 is fixedly connected with the operating handle 4, and an arc extinguishing chamber 12 is fixedly connected to the left side in the insulating plastic housing 1. The working principle here is: the switching-on of the circuit breaker is completed by pulling the operating handle 4, the spring is arranged on the operating handle 4 to store energy during switching-on, rapid switching-off is guaranteed, the arc extinguishing chamber 12 is used for extinguishing arc, and in order to prevent the arc generated during contact from causing interphase short circuit, the arc is contacted with the insulating wall of the arc extinguishing chamber, so that rapid cooling is realized, the releasing effect is increased, the arc column pressure drop is improved, and the arc is forced to be extinguished.

As shown in fig. 1 and 2, in some embodiments, an operating mechanism 8 is provided between the first contact 5 and the second contact 9. The working principle here is: the free tripping mechanism is pushed by the operating mechanism 8 to release the first contact 5 and the second contact 9 to separate and cut off the circuit under the action of the breaking spring 6, so as to play a role in short-circuit protection.

As shown in fig. 3, in some embodiments, cable 1101 is electrically connected to second terminal 10, thermistor 1102 is electrically connected to metal ring 1104, and thermistor 1102 is mounted on cable 1101 by mount 1103. The working principle here is: the thermistor 1102 is mounted on the cable 1101 through the fixing piece 1103, the cable 1101 is connected with the second wiring terminal 10, and the temperature at the second wiring terminal 10 is monitored to timely find whether the short circuit and overload condition of the equipment occur.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. The utility model provides a circuit breaker trip gear, includes insulating moulded case (1), its characterized in that, top right side fixedly connected with first binding post (2) in insulating moulded case (1), lean on top intermediate position fixedly connected with magnetism release (3) in insulating moulded case (1), it is connected with operating handle (4) to lean on top right side position rotation in insulating moulded case (1), be equipped with first contact (5) in insulating moulded case (1) below magnetic release (3), be equipped with separating brake spring (6) on first contact (5), be equipped with hot trip ware (7) in insulating moulded case (1) below first contact (5), lean on the bottom position in insulating moulded case (1) to be equipped with second contact (9), bottom fixedly connected with second binding post (10) in insulating moulded case (1), second binding post (10) one end is equipped with wire temperature-detecting equipment (11), wire temperature-detecting equipment (11) comprise cable (1101), thermistor (1102), mounting (1103) and metal ring (1104).

2. A circuit breaker trip unit according to claim 1, wherein one end of the first contact (5) is fixedly connected to the operating handle (4).

3. A circuit breaker trip unit according to claim 1, characterized in that an operating mechanism (8) is provided between the first contact (5) and the second contact (9).

4. The circuit breaker tripping device according to claim 1, characterized in that the arc extinguishing cover (12) is fixedly connected to the left side in the insulating plastic housing (1).

5. The circuit breaker trip unit of claim 1, wherein the cable (1101) is electrically connected to the second terminal (10), and the thermistor (1102) is electrically connected to the metal ring (1104).

6. The circuit breaker trip unit of claim 1, wherein said thermistor (1102) is mounted on a cable (1101) by a fixture (1103).