DC isolating switch and its harmonic current breaking device

A DC isolation switch, harmonic current technology, applied in high voltage/large current switch, electrical switch, circuit and other directions, can solve the problem of main contact harmonic current ablation, etc., to achieve good stability and reliability.
CN108766827BActive Publication Date: 2020-01-07HENAN PINGGAO ELECTRIC +3
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HENAN PINGGAO ELECTRIC
Publication Date
2020-01-07

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Abstract

The invention relates to a direct current disconnector and a harmonic current break device thereof. The direct current disconnector includes a fixed contact and a conductive knife switch, the conductive knife switch includes an upper contact tube, a static side arc strike assembly is arranged on the side, close to the conductive knife switch, of the fixed contact, and a dynamic side arc strike assembly is arranged on the upper contact tube. The static side arc strike assembly comprises a static side arc strike seat and a self-resetting arc strike rod, and a static side blocking piece is arranged on the side, back to the conductive knife switch, of the self-resetting arc strike rod. The dynamic side arc strike assembly comprises a dynamic side arc strike seat and a self-resetting arc strikearm, the swinging plane of the self-resetting arc strike arm is perpendicular to the swinging plane of the self-resetting arc strike rod, and a dynamic side blocking piece is arranged on the side, close to the fixed contact, of the self-resetting arc strike arm. The self-resetting arc strike arm is provided with a conductive end for being in conducting contact with the self-resetting arc strike rod and intersecting with the swinging plane of the self-resetting arc strike rod, and the hinged part of the self-resetting arc strike arm is located on the outer side of the swinging plane of the self-resetting arc strike rod. Compared with the prior art, a main contact of the disconnector is not prone to being ablated by harmonic current.
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Description

technical field

[0001] The invention relates to a DC isolating switch in the field of high-voltage switches and a harmonic current breaking device used on the DC isolating switch. Background technique

[0002] Since DC transmission has the characteristics of long transmission distance, large transmission capacity, small line loss, easy control and adjustment, etc., it has been more and more widely used in my country's power system. As an outdoor DC isolating switch with an air break, its main function is to provide electrical isolation for high-voltage electrical equipment under no-load conditions. The DC isolating switch installed on the high-voltage side of the DC filter also needs to have a certain ability to break harmonic currents. An existing DC isolating switch, such as a large-capacity high-voltage DC isolating switch disclosed in a Chinese invention patent application with the publication number CN106504933A and the publication date of 2017.03.15, includes static c...

Claims

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