CN213877933U

CN213877933U - Anti-interference vacuum circuit breaker

Info

Publication number: CN213877933U
Application number: CN202022693012.0U
Authority: CN
Inventors: 赵军
Original assignee: Shaanxi Baokai Electrical Equipment Co ltd
Current assignee: Shaanxi Baokai Electrical Equipment Co ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-08-03
Anticipated expiration: 2030-11-20

Abstract

The utility model relates to a circuit breaker technical field discloses an anti-interference vacuum circuit breaker, which comprises an outer shell, the even fixed airtight insulating cylinder of three groups in upper end interval of shell, the shell be equipped with respectively in the below interval of airtight insulating cylinder with the corresponding overvoltage elimination chamber of airtight insulating cylinder is equipped with the overvoltage connection chamber through the baffle is corresponding with the overvoltage elimination chamber, the intracavity is all fixed to be equipped with overvoltage absorbing device to the overvoltage elimination, the intracavity is all fixed to be equipped with the overvoltage connection handle to the overvoltage connection, the overvoltage connection handle runs through the baffle and the overvoltage absorbing device threaded connection between voltage connection chamber and the overvoltage elimination chamber. And the bottom ends of the two sides of the shell are fixedly provided with mounting side lugs. Install places such as switch board through installing the side ear with this device. The inner height of the overvoltage connecting cavity is 50mm, and the inner height of the overvoltage eliminating cavity is 200 mm. The device is convenient to install, and has good effect of eliminating the overvoltage of the circuit breaker.

Description

Anti-interference vacuum circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field especially relates to an anti-interference vacuum circuit breaker.

Background

The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to the application range, the high-voltage and low-voltage boundary lines are relatively vague, and the circuit breakers above 3kV are generally called high-voltage electric appliances. The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, and automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, and the function of the circuit breaker is equivalent to the combination of a fuse type switch, an over-under-heat relay and the like. Furthermore, no parts need to be changed after breaking the fault current. At present, it has been widely used. The vacuum circuit breaker is named because arc extinguishing media and insulating media of contact gaps after arc extinguishing are high vacuum; the arc extinguishing device has the advantages of small volume, light weight, suitability for frequent operation and no need of maintenance for arc extinguishing, and is relatively popularized in power distribution networks. The vacuum circuit breaker is an indoor power distribution device in a 3-10 kV and 50Hz three-phase alternating-current system, can be used for protecting and controlling electrical equipment in industrial and mining enterprises, power plants and transformer substations, is particularly suitable for use places requiring no oil, less maintenance and frequent operation, and can be arranged in a middle cabinet, a double-layer cabinet and a fixed cabinet to be used for controlling and protecting high-voltage electrical equipment.

However, a drawback of the vacuum circuit breaker is that an operation overvoltage is easily generated, when an inductive current is cut off, a current cut-off phenomenon occurs to cause a higher overvoltage, and if the higher overvoltage is not timely processed, the operation speed and the response speed of the vacuum circuit breaker are seriously affected, even the circuit breaker is damaged and broken down.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an anti-interference vacuum circuit breaker, this device eliminate the chamber through the overvoltage that sets up in the below of airtight insulating cylinder and carry out the absorption that goes on the overvoltage to the circuit breaker, then further the connection chamber through overvoltage carries out the further elimination of overvoltage, and thorough elimination goes out the direct influence of overvoltage to the circuit breaker, avoids causing vacuum circuit breaker's functioning speed, response speed to cause the drawback such as circuit breaker damage breakdown even, guarantees vacuum circuit breaker's normal operating.

The utility model discloses an above-mentioned technical problem is solved to following technical means:

the utility model discloses an anti-interference vacuum circuit breaker includes the shell, the even fixed airtight insulating cylinder of three groups of being equipped with in upper end interval of shell, the shell in the below interval of airtight insulating cylinder be equipped with respectively with the corresponding overvoltage elimination chamber of airtight insulating cylinder, with the overvoltage elimination chamber is equipped with the overvoltage connection chamber through the baffle is corresponding, the overvoltage eliminates the intracavity and all fixes being equipped with overvoltage absorbing device, the overvoltage connection intracavity is all fixed and is equipped with the overvoltage connection handle, the overvoltage connection handle runs through the baffle and the overvoltage absorbing device threaded connection between voltage connection chamber and the overvoltage elimination chamber. The overvoltage absorption device is connected with the airtight insulating cylinder through the operating mechanism.

Furthermore, the bottom end of the two sides of the shell is fixedly provided with a mounting side lug. Install places such as switch board through installing the side ear with this device.

Further, the inner height of the overvoltage connecting cavity is 50mm, and the inner height of the overvoltage eliminating cavity is 200 mm.

Further, the lower end of the overvoltage connecting handle is connected with a bolt in a threaded mode. And the residual slight overvoltage is directly eliminated and filtered by connecting the bolt with the grounding wire.

Furthermore, a grounding device is fixedly arranged between the mounting side lugs at the bottom end of the shell. The grounding device further eliminates overvoltage on the shell, and electronic components inside the shell are prevented from being broken down by overvoltage remained on the outer surface.

The utility model has the advantages that: the overvoltage eliminating cavity arranged below the airtight insulating cylinder is used for absorbing overvoltage of the circuit breaker, and then the overvoltage is further eliminated through the overvoltage connecting cavity, so that direct influence of the overvoltage on the circuit breaker is thoroughly eliminated, the defects of damage and breakdown of the circuit breaker and the like caused by the operating speed and response speed of the vacuum circuit breaker are avoided, and the normal operation of the vacuum circuit breaker is ensured.

Drawings

Fig. 1 is a schematic structural diagram of an anti-interference vacuum circuit breaker according to the present invention;

wherein: the device comprises a shell 1, an airtight insulating cylinder 2, an operating mechanism 21, a mounting side lug 3, a grounding device 4, an overvoltage eliminating cavity 5, an overvoltage absorbing device 51, an overvoltage connecting cavity 6 and an overvoltage connecting handle 7.

Detailed Description

The invention will be described in detail with reference to the following drawings and specific embodiments:

as shown in fig. 1, the utility model discloses an anti-interference vacuum circuit breaker includes shell 1, the even fixed airtight insulating cylinder 2 of three groups of being equipped with in upper end interval of shell 1, shell 1 be equipped with in the below interval of airtight insulating cylinder 2 respectively with the corresponding overvoltage elimination chamber 5 of airtight insulating cylinder 2, with overvoltage elimination chamber 5 is equipped with overvoltage connection chamber 6 through the baffle is corresponding, all fixed overvoltage absorbing device 51 that is equipped with in overvoltage elimination chamber 5, all fixed overvoltage connection handle 7 that is equipped with in overvoltage connection chamber 6, overvoltage connection handle 7 runs through the baffle and overvoltage absorbing device 51 threaded connection between voltage connection chamber 6 and the overvoltage elimination chamber 5. The overvoltage absorbing device is connected with the airtight insulating cylinder 2 through an operating mechanism 21 through a 51.

In this embodiment, the bottom ends of the two sides of the housing 1 are fixedly provided with mounting side lugs 3. Install places such as switch board through installing side ear 3 with this device.

In this embodiment, the inner height of the overvoltage connecting cavity 6 is 50mm, and the inner height of the overvoltage eliminating cavity 5 is 200 mm.

In this embodiment, a bolt is screwed to the lower end of the overvoltage connecting handle 7. And the residual slight overvoltage is directly eliminated and filtered by connecting the bolt with the grounding wire.

In this embodiment, the bottom end of the housing 1 is fixedly provided with a grounding device 4 between the mounting side lugs 3. The grounding device further eliminates overvoltage on the shell, and electronic components inside the shell are prevented from being broken down by overvoltage remained on the outer surface.

Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will understand that the present invention can be modified or replaced with other embodiments without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims. The technology, shape and construction parts which are not described in detail in the present invention are all known technology.

Claims

1. An anti-interference vacuum circuit breaker, characterized in that: comprises a shell (1), three groups of airtight insulating cylinders (2) are fixedly arranged at the upper end of the shell (1) at uniform intervals, the shell (1) is provided with overvoltage eliminating cavities (5) which are respectively corresponding to the airtight insulating cylinder (2) at intervals below the airtight insulating cylinder (2), an overvoltage connecting cavity (6) is arranged corresponding to the overvoltage eliminating cavity (5) through a partition plate, overvoltage absorption devices (51) are fixedly arranged in the overvoltage elimination cavities (5), overvoltage connecting handles (7) are fixedly arranged in the overvoltage connecting cavities (6), the overvoltage connecting handle (7) penetrates through a partition plate between the overvoltage connecting cavity (6) and the overvoltage eliminating cavity (5) and is in threaded connection with the overvoltage absorbing device, the overvoltage absorption device (51) is connected with the airtight insulation cylinder (2) through an operating mechanism (21).

2. A tamper resistant vacuum interrupter as defined in claim 1, further comprising: the bottom ends of the two sides of the shell (1) are fixedly provided with mounting side lugs (3).

3. A tamper resistant vacuum interrupter as defined in claim 1, further comprising: the inner height of the overvoltage connecting cavity (6) is 50mm, and the inner height of the overvoltage eliminating cavity (5) is 200 mm.

4. A tamper resistant vacuum interrupter as defined in claim 1, further comprising: the lower end of the overvoltage connecting handle (7) is connected with a bolt in a threaded manner.

5. A tamper resistant vacuum interrupter as defined in claim 1, further comprising: and a grounding device (4) is fixedly arranged between the mounting side lugs (3) at the bottom end of the shell (1).