CN202651679U - Gas insulated switch device - Google Patents

Abstract

The utility model relates to a gas insulated switchgear, which comprises a frame, a circuit breaker and an isolation grounding switch, the isolation outlet terminal of the isolation grounding switch is electrically connected with the input terminal or output terminal of the circuit breaker, and the gas insulated switchgear also includes The isolating grounding switch tank and the sealed circuit breaker tank arranged on the frame, the circuit breaker is set in the circuit breaker tank, the isolating grounding switch is set in the isolating grounding switch tank, and the circuit breaker tank is sealed with An isolating grounding switch connector connected to the incoming or outgoing end of the circuit breaker, and the isolating outgoing line end of the isolating grounding switch is electrically connected to the isolating switch connector through a corresponding cable. The utility model solves the problem of difficult assembly and disassembly between the circuit breaker and the isolation grounding switch in the existing gas insulated switchgear.

Description

A gas insulated switchgear

technical field

The utility model relates to a gas insulated switchgear.

Background technique

Existing gas-insulated switchgear, such as "a gas-insulated metal-enclosed switchgear" disclosed in Chinese patent CN101355241A, includes cable terminals, line isolating switches, voltage transformers, current transformers, circuit breakers, bus isolating switches, and isolating earthing switches , Circuit breaker operating mechanism. The cable terminal is connected to one end of the line isolating switch, the voltage transformer and the current transformer are respectively connected to corresponding interfaces of the line isolating switch, and one interface of the circuit breaker is connected to the current transformer. The busbars of the busbar isolating switch and the isolating and grounding switch are all installed in the circuit breaker room. Although this reduces the space of the whole machine, it is difficult to assemble the three components, and it is not easy to replace when one of the components is damaged. .

Contents of the invention

The purpose of the utility model is to provide a gas insulated switchgear to solve the problem of difficult assembly and disassembly between the circuit breaker and the isolation grounding switch in the existing gas insulated switchgear.

In order to solve the above problems, the technical solution of the utility model is:

A gas insulated switchgear, comprising a frame, a circuit breaker and an isolating grounding switch, the isolated outgoing terminal of the isolating grounding switch is electrically connected to the incoming or outgoing terminal of the circuit breaker, and the gas insulated switchgear also It includes an isolating grounding switch pot and a sealed circuit breaker pot arranged on the frame, the circuit breaker is set in the circuit breaker pot, and the isolating grounding switch is set in the isolating grounding switch pot, The circuit breaker tank is sealed with an isolating grounding switch connector connected to the incoming or outgoing terminal of the circuit breaker, and the isolated outgoing terminal of the isolating grounding switch is connected to the isolating switch through a corresponding cable electrical connection.

The circuit breaker tank is filled with nitrogen or dry air for arc extinguishing.

The pressure range of the nitrogen or dry air is between 0.2-0.4Mpa.

A cable terminal is connected to the ground outlet end of the isolating grounding switch through a corresponding plug connector, and a high-voltage cable is connected to the cable terminal.

An auxiliary grounding switch is also connected to the isolating grounding switch.

The cable connected between the isolating grounding switch and the isolating switch connector is also connected to a current transformer through a corresponding plug-in connector, and the other outlet end of the isolating switch is connected to a current transformer through a corresponding plug-in connector. voltage transformer.

A control cabinet is arranged beside the circuit breaker tank, and the control cabinet is provided with a circuit breaker operating mechanism connected to the circuit breaker in transmission and an isolating earth switch operating mechanism connected to the isolating earth switch for control.

The isolated outgoing terminal of the isolated grounding switch is connected to the incoming terminal of the circuit breaker, and a busbar connector connected to the outgoing terminal of the circuit breaker is also sealed on the circuit breaker tank, and the busbar The connector is electrically connected with a busbar compartment module for outputting electric energy.

Both the bus bar connector and the isolating earthing switch connector are plug-in connectors.

The beneficial effects of the utility model are as follows: the circuit breaker is arranged in the circuit breaker tank to form a circuit breaker module, and the isolation grounding switch is arranged in the isolation grounding switch tank to form an isolation grounding switch module. The wiring terminal of the switch can be electrically connected with the isolating switch connector, which is convenient for assembly; at the same time, when a single part is damaged and needs to be replaced, it is also very convenient to disassemble and replace.

Furthermore, nitrogen or dry gas is poured into the circuit breaker tank to extinguish the arc, which will not affect the environment and meets environmental protection requirements.

Further, the circuit breaker tank in the circuit breaker module has a relatively high pressure-resistant structure, which can ensure sufficient pressure of nitrogen or dry gas to ensure the effect of arc extinguishing.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Fig. 2 is a schematic structural view of Embodiment 2 of the utility model.

Detailed ways

An example of an implementation 1 of a gas insulated switchgear is shown in Figure 1: it includes a frame on which an isolating ground switch tank 4 and a sealed circuit breaker tank 6 are filled with nitrogen gas at a pressure of 0.3Mpa , The circuit breaker tank 6 is provided with a circuit breaker, and the isolation ground switch tank 4 is provided with an isolation ground switch. The circuit breaker tank 6 is sealed with an isolating grounding switch connector and a bus bar connector respectively connected to the incoming and outgoing lines of the circuit breaker. Both the isolating grounding switch connector and the bus bar connector are plug-in connectors, and the bus The connector is electrically connected to the busbar compartment module 2 for externally outputting electric energy; the isolated outlet end and the other outlet end of the isolation grounding switch are respectively connected with a current transformer 7 and a voltage transformer 3 through corresponding plug-in connectors, The outlet end of the current transformer 7 is electrically connected to the isolation grounding switch connector on the circuit breaker tank 6 through a corresponding cable. A cable terminal 8 with a high-voltage cable 9 is connected to the grounding terminal of the isolating grounding switch, and an auxiliary grounding switch 5 is connected to the isolating grounding switch. , realize rapid arc extinguishing, and ensure personal and equipment safety. A control cabinet 1 is arranged beside the circuit breaker tank 6, and the control cabinet 1 is provided with a circuit breaker operating mechanism connected to the circuit breaker in transmission, an isolating earthing switch operating mechanism connected with the isolating earthing switch, and an auxiliary earthing switch connected with the auxiliary earthing switch. The grounding switch operating mechanism and secondary electrical components for control, signal and interlock are also installed in the control cabinet, which can facilitate the operation and display of each executable component in the switchgear.

When working, the external electric energy is introduced into the switchgear through the high-voltage cable 9, and then enters the circuit breaker through the cable terminal 8, the isolation grounding switch, and the current transformer 7. After the circuit breaker is closed, the electric energy enters the busbar room module 2, and then passes through the busbar The conductors in the chamber module 2 transmit the electrical energy to other switching devices.

The circuit breaker and the circuit breaker tank 6 constitute the circuit breaker module, and the circuit breaker chamber module unit is a highly standardized module, each pole is equipped with an arc extinguishing chamber, arranged horizontally, and can be made into single-phase or three-phase. Unit 2 of the busbar room module includes three-phase main busbars and three-position isolating switches. The modular unit can easily meet the configuration requirements of single and double busbars for switchgear. The innovative tank structure of the circuit breaker tank 6 and the busbar connector ensure The optimization of the volume and the quick cooperation with the field. The isolating grounding switch and the isolating grounding switch tank 4 constitute the isolating grounding switch module, the isolating grounding switch includes an isolating switch and a grounding switch, the function of the isolating switch is to ensure that there is an obvious disconnection point during equipment maintenance, and the function of the grounding switch is to When the equipment is being overhauled, ensure that the switchgear is always grounded to ensure the safety of people and equipment. The auxiliary grounding switch 5 constitutes a fast grounding switch module, which can quickly perform system grounding and quickly extinguish the arc when an arc occurs in the switchgear to ensure personal and equipment safety. The control cabinet 1 becomes the control room module. The current and voltage transformer module unit includes current and voltage transformers, and the current and voltage transformers are designed as plug-in structures to ensure extremely high flexibility and applicability for installation. The cable terminal module unit is used for the connection of external high-voltage cables, and is designed with a plug-in structure, which is simple and convenient for installation and maintenance. It is very convenient to replace, disassemble and maintain each module.

In other embodiments of the gas insulated switchgear: the current transformer may not be present. At this time, the terminal of the disconnecting grounding switch may be directly connected to the disconnecting grounding switch connector on the circuit breaker tank; of course, the disconnecting grounding switch may also be connected to at the outlet end of the circuit breaker; the auxiliary grounding switch can also be connected between the busbar compartment module and the busbar connector; the arc extinguishing gas filled in the circuit breaker can also be replaced by dry gas, of course, the pressure of the filling gas can also be 0.2Mpa or 0.4Mpa.

An example of implementation 2 of a gas insulated switchgear is shown in Figure 2: the difference from embodiment 1 is that the busbar compartment module 10 is composed of double busbars, and the circuit breaker behind the module can easily meet the configuration requirements of single and double busbars.

Claims (9)

1. gas-insulated switchgear, comprise frame, circuit breaker and isolation earthing switch, the line end that isolates of described isolation earthing switch is electrically connected with end of incoming cables or the leading-out terminal of described circuit breaker, it is characterized in that: described gas-insulated switchgear also comprises the isolation earthing switch tank that is arranged on the frame and the circuit breaker tank of sealing, described circuit breaker is arranged in the described circuit breaker tank, described isolation earthing switch is arranged in the described isolation earthing switch tank, sealing is equipped with the isolation earthing switch connector that links to each other with end of incoming cables or the leading-out terminal of described circuit breaker on the described circuit breaker tank, and the line end that isolates of described isolation earthing switch is electrically connected with described isolating switch connector by corresponding cable.

2. gas-insulated switchgear according to claim 1 is characterized in that: be filled with nitrogen or dry air for arc extinguishing in the described circuit breaker tank.

3. gas-insulated switchgear according to claim 2, it is characterized in that: the pressure limit of described nitrogen or dry air is between 0.2 ~ 0.4Mpa.

4. gas-insulated switchgear according to claim 1 is characterized in that: be connected with cable termination by corresponding plug-in connector on the ground connection leading-out terminal of described isolation earthing switch, be connected with high-tension cable on the described cable termination.

5. gas-insulated switchgear according to claim 1 is characterized in that: also be connected with auxiliary earthed switch on the described isolation earthing switch.

6. according to entirely requiring 1 described gas-insulated switchgear, it is characterized in that: also be connected with current transformer by corresponding plug-in connector on the cable that is connected between described isolation earthing switch and the described isolating switch connector, be connected with voltage transformer by corresponding plug-in connector on another leading-out terminal of described isolating switch.

7. gas-insulated switchgear according to claim 1, it is characterized in that: described circuit breaker tank is other to be provided with control cubicle, be provided with in the described control cubicle circuit breaker operation mechanism that is in transmission connection with circuit breaker and with the isolation earthing switch operating mechanism of isolation earthing switch control connection.

8. the described gas-insulated switchgear of any one according to claim 1 ~ 7, it is characterized in that: the line end that isolates of described isolation earthing switch links to each other with the end of incoming cables of described circuit breaker, also seal on the described circuit breaker tank and be equipped with the bus tie that links to each other with the leading-out terminal of described circuit breaker, be electrically connected with on the described bus tie for the bus-bar room module of outwards exporting electric energy.

9. gas-insulated switchgear according to claim 8, it is characterized in that: described bus tie and isolation earthing switch connector are the plug-type connector.

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