CN204857606U - A High Voltage Vacuum Intelligent Circuit Breaker - Google Patents

Abstract

The utility model discloses a high pressure vacuum intelligence circuit breaker, including circuit breaker shell, voltage transformer, control mechanism, permanent magnetic mechanism, voltage transformer with the control mechanism electricity is connected, control mechanism with permanent magnetic mechanism connects, voltage transformer, control mechanism and permanent magnetic mechanism are located in the circuit breaker shell, the utility model provides a high pressure vacuum intelligence circuit breaker, voltage transformer install in the circuit breaker shell, have the protection of shell like this, and voltage transformer is difficult to ageingly, and waterproof performance is relatively good to, voltage transformer need not pass through the shell with the inside electrical components wiring of circuit breaker shell, and it is more convenient to work a telephone switchboard.

Description

A High Voltage Vacuum Intelligent Circuit Breaker

technical field

The utility model relates to the field of electrical equipment, in particular to a high-voltage vacuum intelligent circuit breaker.

Background technique

High-voltage vacuum intelligent circuit breaker is a common equipment device for high-voltage power transmission equipment. The existing high-voltage vacuum intelligent circuit breaker includes a circuit breaker shell, a voltage transformer, a control mechanism, and a permanent magnet mechanism. The voltage transformer is electrically connected to the control mechanism, and the control mechanism is connected to the permanent magnet. The magnetic mechanism is connected; the control mechanism and the permanent magnet mechanism are located inside the circuit breaker housing, and the voltage transformer is located outside the circuit breaker housing.

The voltage transformer of this kind of high-voltage vacuum circuit breaker is located outside the circuit breaker shell. It is easy to age after being exposed to wind and sun, and its waterproof performance is correspondingly deteriorated. The component wiring also needs to go through the shell, and the wiring is more troublesome.

Contents of the invention

For this reason, the utility model proposes a new high-voltage vacuum circuit breaker that can solve at least part of the above-mentioned problems.

According to one aspect of the utility model, a high-voltage vacuum intelligent circuit breaker is provided,

Including circuit breaker shell, voltage transformer, control mechanism, permanent magnet mechanism;

The voltage transformer is electrically connected to the control mechanism, and the control mechanism is connected to the permanent magnet mechanism;

The voltage transformer, control mechanism and permanent magnet mechanism are located in the circuit breaker housing.

Optionally, the permanent magnet mechanism is a bistable permanent magnet mechanism.

Optionally, the high voltage vacuum smart circuit breaker also includes a vacuum interrupter, the vacuum

The arc extinguishing chamber includes a longitudinal magnetic field arc extinguishing structure.

Optionally, the voltage transformer is electrically connected to the control mechanism through an aviation head.

Optionally, the circuit breaker housing is closed.

Optionally, the high voltage vacuum smart circuit breaker also includes a manual switch.

Optionally, there is a door on the housing of the circuit breaker, and a sealing strip is installed on the edge of the door.

Optionally, a lightning arrester is also installed on the circuit breaker housing.

In the high-voltage vacuum intelligent circuit breaker provided by the utility model, the voltage transformer is installed in the circuit breaker shell, so that the shell is protected, the voltage transformer is not easy to age, and the waterproof performance is relatively good, and the voltage transformer and the circuit breaker inside the shell The wiring of electrical components does not need to go through the shell, so the wiring is more convenient.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating preferred embodiments, and are not considered to limit the present invention. Also throughout the drawings, the same reference numerals are used to designate the same components. Wherein in the drawings, letter marks after reference numerals indicate a plurality of identical components, and when referring to these components generally, the last letter marks thereof will be omitted. In the attached picture:

Fig. 1 is a structural schematic diagram of a high-voltage vacuum intelligent circuit breaker provided by the utility model;

Among them, 101, the circuit breaker shell; 102, the voltage transformer; 103, the control mechanism; 104, the permanent magnet mechanism.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

The high-voltage vacuum intelligent circuit breaker provided according to the advantages of the utility model includes a circuit breaker housing 101, a voltage transformer 102, a control mechanism 103, and a permanent magnet mechanism 104; the permanent magnet mechanism is preferably a bistable permanent magnet mechanism, and here The bistable permanent magnet mechanism is a double-coil permanent magnet mechanism. The middle part of the static iron core of this structure is inlaid with a permanent magnet, and the poles of the same name of the two permanent magnets face the center. An opening coil and a closing coil (double coils) are respectively installed above and below the permanent magnet. In the closed state, the reluctance of the permanent magnet through the upper magnetic circuit is very small, while the reluctance of the permanent magnet through the lower magnetic circuit is very large due to the large air gap. Most of the magnetic flux of the permanent magnet passes through the upper magnetic circuit, and the moving iron core is firmly attracted to the upper magnetic pole of the static iron core. In the open state, the magnetic resistance of the permanent magnet passing through the lower magnetic circuit is very small, the magnetic flux is concentrated in the lower magnetic circuit, and the moving iron core is attracted to the lower magnetic pole. (Bistability, that is, opening state and closing state) To make it open, as long as a direct current is passed through the opening coil, the direction of the magnetic force line generated by the current is opposite to the direction of the magnetic force line of the permanent magnet at the upper end of the static iron core. The magnetic field generated by the current in the gate coil reduces the suction force on the moving iron core. When the current increases to a certain value, the sum of the suction force on the moving iron core is less than the mechanical load on the moving iron core. At this time, the moving iron core will Downward movement. Once the moving iron core moves downward, an air gap appears between the upper end of the moving iron core and the upper magnetic pole of the static iron core, the reluctance at the upper end increases, and the reluctance at the lower end decreases. The suction force of the upper magnetic pole of the static iron core to the moving iron core decreases, and the suction force of the lower magnetic pole to the moving iron core increases. The downward resultant force on the moving iron core increases, so that the moving iron core accelerates to move downward. This process continues until the lower end of the moving iron core is in contact with the lower magnetic pole of the static iron core; until the sub-action is completed. At this time, the moving iron core is attracted by the permanent magnet again and is in a stable state. Even if the current of the opening coil is cut off, the moving iron core will not return to the closing state. When the closing coil is energized, the coil current generates a diamagnetic field in the lower gap, and the total suction force on the moving iron core decreases. When the suction force is less than the mechanical load on the moving iron core, the moving iron core moves upwards, and finally reaches the closing position, and the moving iron core is re-opened. The permanent magnet pulls in. After the closing coil current is cut off, the moving iron core remains in the closing position, and the closing process ends. When the permanent magnet is subjected to a strong reverse magnetic field, its magnetic pole performance is reduced. No matter in the closing and opening process of the double-coil permanent magnet mechanism, the external magnetic field generated by the coil current is always in the direction of the permanent magnet's own magnetic field on the permanent magnet. same. This means that the permanent magnet is not demagnetized by the diamagnetic field. The bistable permanent magnet mechanism circuit breaker will not be charged during operation, which not only saves electric energy, but also prevents the coil from burning out. The voltage transformer is electrically connected with the control mechanism, preferably through the aviation head, and the voltage transformer is electrically connected with the control mechanism through the aviation head, which can be easily disassembled, especially for emergency power supply or maintenance. Can greatly save disassembly time. The control mechanism is connected to the permanent magnet mechanism; the connection between the control mechanism and the permanent magnet mechanism is an existing technology, and will not be repeated here. The voltage transformer, control mechanism and permanent magnet mechanism are located in the circuit breaker housing. The voltage transformer can be fixed inside the circuit breaker case by bolts, specifically, it can be fixed on the inner wall of the circuit breaker case. Of course, it can also be fixed in other ways, as long as the fixing function can be realized, no specific limitation is set here. The circuit breaker shell is preferably closed, so that the circuit breaker has better moisture-proof and anti-condensation performance, and can be used in high-temperature and humid areas after severe cold. Specifically, there is a door on the circuit breaker casing, and a sealing strip is installed on the edge of the door to facilitate the sealing of the circuit breaker casing, and the door provided on the circuit breaker casing can facilitate maintenance and testing of the circuit breaker.

In the high-voltage vacuum intelligent circuit breaker provided by the utility model, the voltage transformer is installed in the circuit breaker shell, so that the shell is protected, the voltage transformer is not easy to age, and the waterproof performance is relatively good, and the voltage transformer and the circuit breaker inside the shell The wiring of electrical components does not need to go through the shell, so the wiring is more convenient.

High-voltage vacuum intelligent circuit breakers generally include a vacuum interrupter. The vacuum interrupter in this application preferably includes a longitudinal magnetic field arc-extinguishing structure. The head passes through the hole and contacts with the static contact to form a conductive path. There are copper-tungsten alloys on the arc extinguishing chamber, the static contact and the moving contact rod, and there are arc extinguishing coils outside the arc extinguishing chamber. When the moving contact rod and the static contact are separated, the arc will immediately transfer to the arc extinguishing chamber, and the current flows through the coil, and a magnetic field is established in the arc extinguishing chamber. The magnetic field is perpendicular to the arc, so that the arc rotates rapidly in the arc extinguishing chamber, the arc is elongated, and the arc is extinguished when the current crosses zero by sulfur hexafluoride gas. Its characteristics are: (1) The arc is controlled by the magnetic field in the arc extinguishing chamber, and will not burn out other components. (2) The high-speed rotation of the arc prevents the burning loss of the arc extinguishing chamber from concentrating on one part, which increases the service life. (3) When the current is large, the arc extinguishing ability is strong, and when the current is small, the ability is small. No interception occurs. (4) In order to still have a strong arc extinguishing ability when the current crosses zero, a certain phase difference between the magnetic field and the current is designed to ensure reliable extinguishing when the current crosses zero. (5) The arc extinguishing chamber has a simple structure and a small volume, which can reduce the volume of the switch and facilitate manufacture. The longitudinal magnetic field is generated by the longitudinal magnetic field arc extinguishing structure, which accelerates the diffusion of ionized particles and reduces the arc energy, so that the vacuum interrupter has the advantages of small heat generation, short arc extinguishing time, and long service life.

In the process of using the high-voltage vacuum intelligent circuit breaker, there may be faults, affecting its intelligent function, and thus losing intelligent control. For this reason, the high-voltage vacuum intelligent circuit breaker also includes a manual switch. When the high-voltage vacuum intelligent circuit breaker loses intelligent control, it can Temporary processing by manual switch.

In order to prevent lightning from forming an overvoltage on the circuit breaker, a lightning arrester is installed on the circuit breaker housing.

The high-voltage vacuum intelligent circuit breaker provided by this application includes the following functional features:

a. The circuit breaker adopts a three-phase pillar structure, which has the characteristics of stable and reliable breaking performance, no danger of combustion and explosion, safety, maintenance-free, small size, light weight and long service life.

b. The circuit breaker adopts a fully enclosed structure with good sealing performance, moisture-proof and anti-condensation performance, and is used in severe cold or high temperature and humid areas.

c. The three-phase pillar adopts imported outdoor epoxy resin solid insulation, which has the characteristics of high temperature resistance, ultraviolet resistance and aging resistance.

d. The operating mechanism adopts a permanent magnet mechanism and a bistable structure electromagnet. The coil is not charged during operation, which saves power and does not cause coil burnout. The vacuum circuit breaker is equipped with manual opening and closing functions, and has the characteristics of simple structure, stable characteristics, flexible and reliable action, and long service life. The circuit breaker adopts a vacuum interrupter, which is oil-free and gas-free, safe and reliable, and easy to maintain.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.

Claims (8)

1. A high-voltage vacuum intelligent circuit breaker, including a circuit breaker casing, a voltage transformer, a control mechanism, and a permanent magnet mechanism; The voltage transformer is electrically connected to the control mechanism, and the control mechanism is connected to the permanent magnet mechanism; It is characterized in that the voltage transformer, control mechanism and permanent magnet mechanism are located in the circuit breaker casing. 2. The high-voltage vacuum intelligent circuit breaker according to claim 1, wherein the permanent magnet mechanism is a bistable permanent magnet mechanism. 3. The high-voltage vacuum intelligent circuit breaker according to claim 2, characterized in that, the high-voltage vacuum intelligent circuit breaker further comprises a vacuum interrupter, and the vacuum interrupter comprises a longitudinal magnetic field arc-extinguishing structure. 4. The high-voltage vacuum intelligent circuit breaker according to any one of claims 1-3, characterized in that, the voltage transformer is electrically connected to the control mechanism through an aviation head. 5. The high-voltage vacuum intelligent circuit breaker according to claim 4, characterized in that, the circuit breaker housing is closed. 6. The high-voltage vacuum intelligent circuit breaker according to claim 5, characterized in that, the high-voltage vacuum intelligent circuit breaker further comprises a manual switch. 7. The high-voltage vacuum intelligent circuit breaker according to claim 6, characterized in that there is a door on the housing of the circuit breaker, and a sealing strip is installed on the edge of the door. 8. The high-voltage vacuum intelligent circuit breaker according to claim 7, wherein a lightning arrester is installed on the circuit breaker casing.