CN204270968U - A double-break vacuum switch module of a multi-break high-voltage vacuum circuit breaker - Google Patents

Abstract

The utility model discloses a kind of double-fracture vacuum switch module of multi-break high-pressure vacuum breaker, belong to power high voltage field of switches, module is primarily of two vacuum interrupters of connecting and the rapid permanent-magnet operating mechanism composition being connected in each arc control device moving conductive rod, two vacuum interrupters are pressed certain angle and are become " V " font to arrange, reach the object optimized insulation coordination, be convenient to multimode series connection; This cascaded structure design can make the mechanism of two vacuum interrupters share a driving power control cabinet, reduces block coupled in series number, thus simplifies the overall structure of block coupled in series formula vacuum circuit-breaker.The utility model solves that serial module structure vacuum circuit breaker constructions is complicated, cost is high, the problem of poor reliability, for multi-break high-pressure vacuum breaker provides a kind of utility structure.

Description

A double-break vacuum switch module of a multi-break high-voltage vacuum circuit breaker

technical field

The utility model relates to the field of electric high-voltage switches, in particular to a double-fracture vacuum switch module structure of a multi-fracture high-voltage vacuum circuit breaker.

Background technique

In the high-voltage power system, the circuit breaker is one of the important equipment to ensure the safe operation of the system. It has the functions of closing and breaking the circuit, changing the connection mode and topology of the system, and breaking the fault current. It is responsible for control and protection. Double duty. Vacuum circuit breaker is a kind of green dielectric circuit breaker successfully applied in the medium voltage field. At present, it is developing to high voltage level to replace the SF6 circuit breaker with greenhouse effect. One of the most feasible solutions to realize high-voltage and ultra-high-voltage applications is the multi-fracture technology through module series connection. The technical bottleneck is the high reliability and miniaturization of module units. If the size of the original module is directly connected in series, the structure is complex and the cost is high. , Poor reliability and other defects limit the development of this circuit breaker to high voltage levels.

Utility model content

The purpose of this utility model is to propose a double-fracture vacuum switch module structure of a multi-fracture high-voltage vacuum circuit breaker, which is used to form a relatively compact high-voltage vacuum circuit breaker to ensure switching parameters, thereby solving the bottleneck of the prior art.

The utility model provides a double-fracture vacuum switch module of a multi-fracture high-voltage vacuum circuit breaker. The double-fracture vacuum switch module includes two fractures with the same structure, a module conductive shell 7 and a module control box 8 .

The "V"-shaped fracture is composed of two fractures with the same structure, and each fracture includes an outlet flange 1, a vacuum interrupter 2, an insulating jacket 3, a sliding contact lead 4, a permanent magnet operating mechanism 5 and a position detection element 6, where the outlet flange 1 is connected to the vacuum interrupter 2; the moving end of the vacuum interrupter 2 is connected to the sliding contact lead 4; the vacuum interrupter 2 is connected to the permanent magnet operating mechanism 5; the position detection element 6 is installed on On the guide rod of the permanent magnet operating mechanism 5; the outlet flange 1, the vacuum interrupter 2, the sliding contact lead 4, the permanent magnet operating mechanism 5 and the position detection element 6 are installed in the insulating jacket to form a fracture.

The two fractures in the shape of a "V" are fixedly installed on the supporting conductive shell 7.

The module control box 8 is installed inside the supporting conductive housing 7 . The self-contained power supply inside the module control box 8 and its power management system are responsible for the drive of the permanent magnet operating mechanism 5 in the two fractures, which can realize the best coordination of the electrical parameters and structural parameters of the double fractures.

Two vacuum interrupters and two permanent magnet operating mechanisms in the "V"-shaped fracture composed of two fractures with the same structure are fixed to the supporting conductive shell at an angle of 30-120 degrees symmetrical to the center line.

The utility model has the effects of reducing the number of modules in series, solving the problems of large scale and high cost, and providing high-parameter basic modules for multi-fracture high-voltage vacuum circuit breakers. The double-break vacuum switch module involved in the technology has a simple structure, saves space, and is low in cost, and is beneficial to realizing a vacuum circuit breaker of a higher voltage level.

Description of drawings

Fig. 1 is the front view of the structural diagram of the double-break vacuum switch module of the present invention.

Fig. 2 is the left view of the structural diagram of the double-break vacuum switch module of the present invention.

Fig. 3 is a top view of the structure diagram of the double-break vacuum switch module of the present invention.

Fig. 4 is the front view of the embodiment of the utility model.

In the figure: two identical fractures are symmetrically arranged on the center line; 1. Outlet flange; 2. Vacuum interrupter; 3. Insulation jacket; 4. Sliding contact lead; ; 8 module control box; 9 main outlet; 10 double-break module body; 11 220kV support insulator; 12 control optical fiber; 13 circuit breaker base.

Detailed ways

The specific embodiment of the utility model is further described below in conjunction with the accompanying drawings and technical solutions.

The fracture of the module is composed of an outlet flange 1, a vacuum interrupter 2, a moving end sliding contact lead 4, a permanent magnet operating mechanism 5 and a position detection element 6 in sequence. When the switch module is in the closed state, the current flows directly from the outlet flange 1 of one fracture, the vacuum interrupter 2, and the sliding contact lead 4 of the moving end to the conductive shell 7 of the module, and then the sliding contact lead 4 of the moving end of the other fracture , Vacuum interrupter 2, outflow to outlet flange 1. After the opening command issued by the module control box 8, the permanent magnet operating mechanisms 5 of the two fractures simultaneously pull the moving conductive rods of the vacuum interrupters 2 to complete the opening action, and the two vacuum interrupters 2 are extinguished. The opening state of two series-connected fractures is formed after the fault arc. The insulating jacket 3 ensures the external insulation of each fracture. The mechanisms of the two vacuum interrupters share a modular control box 8. The self-contained power supply and power management system in the box is responsible for the drive power control and light control of each permanent magnet operating mechanism 5. signal conversion.

In a preferred way, in order to achieve the above purpose, the two identical fractures are arranged in a "V" shape, and the angle of symmetry to the center line is 30 degrees to 120 degrees, which can ensure the anti-fouling of the double fractures and the insulation coordination of multiple fractures in series , the rated voltage level of the vacuum interrupter is 40.5kV-72.5kV, the materials of the outlet flange 1 and the conductive shell 7 of the module are high-conductivity cast aluminum, and the movable conductive rod of the vacuum interrupter is directly connected to the The conductive shell 7 of the module saves the insulating pull rod and the kinematic pair of the conventional vacuum switch.

The embodiment of the utility model is a 252kV multi-fracture high-voltage DC vacuum circuit breaker, each phase is composed of three double-fracture vacuum switch modules of the utility model, as shown in Fig. 4 . The parameters of the double-break vacuum switch module are: rated voltage 72.5kV (2X 40.5kV), rated short-circuit fault breaking current 40kA.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. The equivalent replacement or change of the new technical solution and the concept of the utility model shall be covered by the protection scope of the utility model.

Claims (2)

1. A double-fracture vacuum switch module of a multi-fracture high-voltage vacuum circuit breaker, characterized in that the double-break vacuum switch module includes two structurally identical fractures, a module conductive shell and a module control box; The "V"-shaped fracture is composed of two fractures with the same structure, and each fracture includes an outlet flange, a vacuum interrupter, an insulating jacket, a sliding contact lead, a permanent magnet operating mechanism and a position detection element, and the outlet flange Connected with the vacuum interrupter; the moving end of the vacuum interrupter is connected with the sliding contact lead wire; the vacuum interrupter is connected with the permanent magnet operating mechanism; the position detection element is installed on the guide rod of the permanent magnet operating mechanism; the outlet flange , Vacuum interrupter, sliding contact leads, permanent magnet operating mechanism and position detection element are installed in the insulating jacket to form a fracture; The "V"-shaped fracture is fixedly installed on the supporting conductive shell; The module control box is installed inside the supporting conductive shell; the self-contained power supply and its power management system inside the module control box are responsible for the drive of the permanent magnet operating mechanism in the two fractures, so as to realize the best coordination between the electrical parameters and structural parameters of the double fractures . 2. The double-break vacuum switch module according to claim 1, characterized in that, two vacuum interrupters and two permanent magnet operating mechanisms in the "V"-shaped fracture composed of two fractures with the same structure , fixed to the supporting conductive shell at an angle of 30-120 degrees symmetrical to the center line.