High voltage AC switchgear

A high-voltage AC and switchgear technology, applied in the busbar/line layout, substation/distribution device casing, etc., can solve the adverse effects of high-voltage AC switchgear reliability, difficult volume of high-voltage AC switchgear, and refusal of interlocking devices to move, etc. problems, to achieve the effect of reducing the number of switching elements, improving reliability, and reducing loop resistance

Active Publication Date: 2018-07-31
TOP DIRECTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This design has always been the standard design of high-voltage AC switchgear. According to the current technical standards, such as the insulation distance must meet the size specified in the standard, it is quite difficult to reduce the volume of high-voltage AC switchgear.
[0005] In the above-mentioned standard design, the opening and closing of the isolating switch, vacuum switch, and grounding switch shall be operated according to a standard safety operation specification procedure by using an interlocking device, so as to prevent the power grid and high-voltage AC There is an accident in the switchgear; in the standard safe operation procedure, the interlock device that controls the opening and closing procedures of the isolating switch and the grounding switch is to control the closing of the grounding switch after the isolating switch is opened and the isolating switch after the opening of the grounding switch. In order to prevent faulty operation from causing power grid grounding accidents, but in the past, the interlock device refused to operate and malfunctioned.
[0006] also, figure 1 The electrical connection between the vacuum switch and the isolating switch needs to be realized through four connectors, that is, the moving conductive rod of the vacuum switch is flexibly connected to the fixed terminal of the vacuum switch, and the fixed terminal of the vacuum switch is connected to the isolating switch through a conductor. More heads lead to higher resistance, so more heat is generated, which adversely affects the reliability of high-voltage AC switchgear

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0026] see figure 2 , a high-voltage AC switchgear proposed in Embodiment 1, the circuit part mainly includes a vacuum switch 20 and an integrated switch 10, and the integrated switch 10 is placed between the main bus 30, the vacuum switch 20 and the pre-grounded bus 40; the vacuum switch 20 and the branch The main bus 50 is electrically connected, and the branch main bus 50 is electrically connected to the pre-ground bus 40; the integrated switch 10 can connect the vacuum switch 20 to the main bus 30, or ground the pre-ground bus 40; the integrated switch 10 connects the vacuum switch 20 to the main When the bus 30 is connected, the integrated switch 10, the vacuum switch 20 and the branch main bus 50 constitute the main circuit; when the integrated switch 10 grounds the pre-grounded bus 40, the vacuum switch 20 is isolated from the main bus 30, and the integrated switch 10 and the pre-grounded bus 40 constitutes a ground loop. Therefore, in this embodiment, the pre-ground ...

Embodiment 2

[0032] see Figure 4 , the basic idea of ​​the second implementation is consistent with that of the first example, the difference is only in the specific structural design of the integrated switch, that is, the integrated switch 10 of the first embodiment is a double-break design, while the integrated switch 10' of the second embodiment is a single-break design , specifically: the integrated switch 10 of Embodiment 1 has an upper main static contact 14, a lower main static contact 15, an insulating rotating shaft 13 and a three-phase moving contact 12, and the insulating rotating shaft 13 rotates to a non-working position state (that is, an isolation position state or ground position state), the two three-phase moving contacts 12 on the two ends of the insulating shaft 13 are separated from the main static contact 14 and the lower main static contact 15 by a certain distance, that is, double fractures are formed; and the implementation In the second example, there is no lower ...

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Abstract

The invention relates to a high-voltage alternating current switch cabinet. The high-voltage alternating current switch cabinet comprises a vacuum switch and an integrated switch, wherein the integrated switch is placed among a main bus, the vacuum switch and a pre-ground bus; the vacuum switch is electrically connected with a branched main bus; the branched main bus is electrically connected with the pre-ground bus; the integrated switch can connect the vacuum switch with the main bus or enables the pre-ground bus to be connected to the ground; when the integrated switch connects the vacuum switch with the main bus, the integrated switch, the vacuum switch and the branched main bus form a main loop; and when the integrated switch enables the pre-ground bus to be connected to the ground, the vacuum switch and the main bus are isolated, and the integrated switch and the pre-ground bus form a ground loop. According to the high-voltage alternating current switch cabinet, only two switch elements of the vacuum switch and the integrated switch are included, thus the number of the switch elements is decreased, a circuit structure is simplified, the overall volume of the high-voltage alternating current cabinet is reduced, and the reliability of the high-voltage alternating current cabinet is improved; and meanwhile an interlocking device is not needed for use, and thus the problems of faults of failure and misoperation of the interlocking device are avoided.

Description

technical field [0001] The invention relates to the technical field of high-voltage AC switchgear, in particular to a high-voltage AC switchgear with a voltage range of 3-40.5KV for receiving and distributing electric energy. Background technique [0002] High-voltage AC switchgear is a complete set of equipment that assembles various high-voltage electrical components and control, measurement, and protection devices in a metal-enclosed cabinet. Its function is to realize the control, protection, and isolation of high-voltage circuits through the separation and closing of high-voltage switches. , grounding, and complete the transmission of electric energy. [0003] The reliability and safety requirements of electric energy transmission are very high. Circuit breakers, load switches, isolating switches, and grounding switches in high-voltage AC switch cabinets are the most basic high-voltage components to complete electric energy transmission. Vacuum interrupters are used as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02B1/20H02B1/30
CPCH02B1/20H02B1/30
Inventor 林韶光
Owner TOP DIRECTION LTD
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