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Circuit breaker and its insulation method

A technology for vacuum circuit breakers and insulating parts, which is applied to high-voltage air circuit breakers, circuits, electrical components, etc., can solve the problems of short circuit of the moving end of the vacuum bubble, the overall size of the circuit breaker, and the air breakdown of the insulating barrel. Compact, reliability-enhancing effect

Active Publication Date: 2016-03-30
SCHNEIDER ELECTRIC IND SAS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, this traditional high-voltage circuit breaker still has problems in insulation, that is, when there is a transient high pulse voltage in the system, the live end of the insulating pull rod connected to the vacuum bubble end and the phase of the operating mechanism There is an instantaneous high voltage difference between the ground terminals of the connected insulating rods. If the length of the insulating part of the insulating rod is insufficient, this high voltage difference will cause the air in the insulating barrel to be broken down, thereby causing vacuum bubbles to move the terminal. short circuit problem
In order to prevent this problem, it is necessary to increase the length of the insulating part of the insulating tie rod, but this solution is not conducive to the overall size reduction of the circuit breaker, which is contrary to the current development trend

Method used

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  • Circuit breaker and its insulation method
  • Circuit breaker and its insulation method

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Embodiment Construction

[0031] Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. First of all, it should be pointed out that the present invention only involves the improvement of the electrical insulation of the insulating pull rod, therefore, in the following description, the detailed description of other structures and components of the vacuum circuit breaker will be omitted, and those skilled in the art can The specific structures of these other parts and components are obtained with the knowledge of their own background technology. In addition, in the following description and appended claims, unless otherwise specified, each term should be interpreted in a generally broad sense, for example, "connected" means to include one element directly connected to another element, wherein there are no intervening elements , and also includes that one element is connected to another element through other intermedia...

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Abstract

The invention discloses an insulating structure for moving parts and a vacuum circuit breaker including the insulating structure. The moving parts are accommodated in an insulating housing and are movable between at least two positions. The moving parts include an electrically charged third One end, a grounded second end opposite to the first end, and an insulating part disposed between the first end and the second end to insulate the first end and the second end, characterized in that it also includes A stretchable insulating member, the inner circumferential side of the insulating member is airtightly connected around the outer circumference of the insulating part, and the outer circumferential side of the insulating part is airtightly connected to the insulating shell to connect the third One end is airtightly isolated from the second end.

Description

technical field [0001] The invention relates to a circuit breaker, especially a medium-high voltage vacuum circuit breaker, and relates to an insulation structure and an insulation method for the vacuum circuit breaker. Background technique [0002] A circuit breaker is an electrical device commonly used in a circuit, which is used to disconnect the circuit in the event of a fault such as overload or overheating in the circuit. Circuit breakers can be divided into low voltage circuit breakers and high voltage circuit breakers according to their rated voltage. High-voltage circuit breakers are usually used in circuits with a voltage exceeding 1000V. They can not only cut off or close the no-load current and load current in the high-voltage circuit, but also cut off the overload current and short-circuit current through the function of the relay protection device when the system fails. . Commonly used high-voltage circuit breakers include oil circuit breakers (more oil circu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/66H01H33/662
Inventor 方明姚勤智
Owner SCHNEIDER ELECTRIC IND SAS
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