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All-working-condition intelligent solid-sealed high-voltage AC vacuum circuit breaker

A vacuum circuit breaker, high-voltage AC technology, applied in high-voltage air circuit breakers, high-voltage/high-current switches, circuits, etc. The arc chamber contact can not be driven and other problems, to achieve the effect of shortening the arc extinguishing time, wide application range and simple structure

Active Publication Date: 2020-02-21
河北承捷电力设备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, most of the high-voltage vacuum circuit breakers now use the connecting rod as the transmission mechanism, and the gap between the shaft heads connected to the main crank arm will increase with the increase of use time. When the operating mechanism moves, its power cannot It is reflected on the transmission mechanism in real time, that is, the contacts in the vacuum interrupter cannot be driven, and thus the opening and closing operation of the circuit breaker cannot be realized, resulting in failures of refusal to close and refusal to open, and the maintenance cycle and service life of the circuit breaker are corresponding shorten

Method used

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  • All-working-condition intelligent solid-sealed high-voltage AC vacuum circuit breaker
  • All-working-condition intelligent solid-sealed high-voltage AC vacuum circuit breaker

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as Figure 1-5 As shown, the full working condition intelligent solid-sealed high-voltage AC vacuum circuit breaker includes a transmission chamber 1, an insulating cylinder 9, and an arc extinguishing chamber 10. The insulating cylinder 9 is equipped with an arc extinguishing chamber 10, and the upper and lower ends of the arc extinguishing chamber 10 are respectively The supporting rod 22 is connected with the movable conductive rod 15, the top of the supporting rod 22 is connected with the sealing plate 12, the bottom of the movable conductive rod 15 is connected with the top of the disc spring 5, and the lower end of the disc spring 5 is connected with the insulating pull rod 4. The circuit breaker of the present invention has the advantages of simple structure, high degree of intelligence, and wide application range. The upper and lower contacts in the arc extinguisher can be disconnected at the same time when opening, which greatly shortens the opening time. S...

Embodiment 2

[0030] During the actual use of the all-working-condition intelligent solid-sealed high-voltage AC vacuum circuit breaker of the present invention: when the gate is opened, the gate-opening solenoid valve 2 will react quickly and drive the four-bar linkage mechanism to move 3, and the four-bar linkage mechanism 3 Drive the insulating pull rod 4 and the movable conductive rod 15 to make the movable contact 13 move downward, and at the same time, the coil 18 on the inner wall of the arc extinguishing chamber 10 is energized to form a magnetic circuit in the air gap between the armature 16 and the static iron core 17 to generate a suction force. Make the armature 16 drive the bellows shield 19 and the static conductive rod 23 connected to the bellows shield to move towards the opening direction, reach the opening position, and the two contacts can realize circuit breaking, and the opening of the two-way movement can shorten the opening time. Due to the special setting of the dynam...

Embodiment 3

[0032] Choose the vacuum circuit breaker (experimental group) of the present invention and the vacuum circuit breaker (control group) of the same type on the market to carry out the test experiment of arc extinguishing time, the coil voltage of two groups of circuit breakers is DC220V, and the main contact conventional heating current is 150A , The opening distance of the moving and static contacts, the contact stroke, the contact pressure of the contact, the average closing time and other parameters are all set to be consistent, and the arc extinguishing time is judged by multiple different experimental currents, and the time constant of the test is L / R=0.8 ms.

[0033] attached by Figure 5 It can be seen that when the constant of the experimental group and the control group is L / R=0.8, the overall arc extinguishing time of the experimental group is between 1.3ms-1.7ms, while the overall arc extinguishing time of the control group is 1.63 Between ms-1.88ms, the arc extingui...

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Abstract

The invention provides an all-working-condition intelligent solid-sealed high-voltage AC vacuum circuit breaker, and belongs to the technical field of high-voltage switches. The circuit breaker comprises a transmission chamber, an insulating cylinder and an arc extinguishing chamber. The arc extinguishing chamber is arranged in the insulating cylinder. The upper end and the lower end of the arc extinguishing chamber are connected with a supporting rod and a movable conducting rod respectively. The top of the supporting rod is connected with a sealing plate. The bottom of the movable conductingrod is connected with top end of a disc spring. The bottom end of the disc spring is connected with an insulating pull rod. According to the invention, an upper contact and a lower contact in the arcextinguishing chamber can move in opposite directions during opening, so that the burning loss of the contacts is reduced, the shaking after opening is also reduced, and the service life of the contacts is prolonged.

Description

technical field [0001] The invention belongs to the technical field of high-voltage switches, and in particular relates to an intelligent solid-sealed high-voltage AC vacuum circuit breaker under all working conditions. Background technique [0002] High-voltage vacuum circuit breakers generally include brackets, vacuum interrupters, conductive circuits, transmission mechanisms, insulating supports, and operating mechanisms. The brackets are used to install various functional components, and the vacuum interrupter is used to extinguish For the generated arc, the conductive circuit is used to connect with the moving end and the static end of the vacuum interrupter to form a current channel, and the transmission mechanism is used to transmit the movement of the operating mechanism to the vacuum interrupter to realize closing and opening, and is used for insulating support To connect various functional components to meet the insulation requirements, the operating mechanism is a...

Claims

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Application Information

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IPC IPC(8): H01H33/66H01H33/664H01H33/666
CPCH01H33/66H01H33/664H01H33/666
Inventor 庞冬冬
Owner 河北承捷电力设备制造有限公司
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