Arc-resistance piece structure and vacuum switch contact

A vacuum switch and arc-resistant technology, used in electrical switches, high-voltage/high-current switches, electrical components, etc., can solve the problems of small breaking capacity, large resistance, poor voltage withstand ability, and poor anti-welding ability, and achieve the cut-off value. Low, strong breaking ability, strong anti-welding ability

CN100428386CInactive Publication Date: 2008-10-22BEIJING BOE VACUUM ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2008-10-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

Structure of arc-resistant piece includes an arc-resistant piece with high breaking capacity. Being in use for cutting off electric arc generated when vacuum switch is turned to off, at least one part with small diversion closure value is embedded on upper surface of the arc-resistant piece. The invention also is related to a vacuum switch contactor includes body case, conductive part, conductive bottom, magnetic generation assembly, and the said structure of arc-resistant piece. Perforated notch is setup inside the magnetic generation assembly from up to down. Being inserted to the notch, conductive part with two ends contacts to the conductive bottom and structure of arc-resistant piece respectively. Conductivity of the magnetic generation assembly is lower than conductivities of other parts. Melting point of the body case is higher than melting points of other parts. Features are: high capability of anti fusion welding, high breaking capacity, and low diversion closure value.
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Description

technical field

[0001] The invention relates to an arc-resistant structure and a vacuum switch contact, in particular to an arc-resistant structure and a vacuum switch contact for a high-voltage vacuum switch. Background technique

[0002] Switching equipment is a kind of equipment that must be applied in the circuit, and it plays the role of closing and breaking the circuit. During the breaking process of the switch contact, an arc will be generated, and the plasma arc with the arc column as the cone surface will be generated from the cathode spot combustion. Especially in high-voltage circuits, the arc generated by the switch is particularly strong.

[0003] The arc will increase the temperature of the switch and wear the switch, and the existence of the arc will reduce the current breaking capacity of the contacts. Therefore, the arc must be extinguished during the switching process of the switch contact. Most of the current switchgear uses such as oil, sulfur hexafluo...

Examples

Embodiment 1

[0025] Such as figure 1 with figure 2 Shown is the plan view and cross-sectional view of Embodiment 1 of the arc-resistant member structure of the vacuum switch contact of the present invention. The arc-resistant part 1 is circular, with a thickness of 20 mm, made of copper-chromium alloy, and the weight percentage of chromium is 25% (CuCr25); Cu is -400 mesh, Cr is -400 mesh, and the upper surface of the arc-resistant part 1 is embedded with two A circular small cut-off value component 3 is made of AgWC alloy, the weight percentage of Ag is 70%, and the thickness is 5mm. The surface of the arc-resistant component 1 is higher than the surface of the small cut-off value component 3 .

[0026] When the contact of the vacuum switch is disconnected, the contact area of ​​the contact gradually decreases until there is only one contact point between the contacts, and at the same time the contact resistance gradually increases, because the arc-resistant layer 1 is CuCr25, and its r...

Embodiment 2

[0028] Such as image 3 with Figure 4 Shown is the top view and cross-sectional view of Embodiment 2 of the arc-resistant member structure of the vacuum switch contact of the present invention. The arc-resistant part 1 is circular, with a thickness of 15mm, made of copper-chromium alloy, and the weight percentage of chromium is 20% (CuCr20); Cu is -325 mesh, Cr is -325 mesh, and the upper surface of the arc-resistant part 1 is embedded with a ring The welding-resistant part 2 is 17mm in thickness, made of copper-chromium alloy, the weight percentage of chromium is 50% (CuCr50), the Cu is -325 mesh, and the Cr is -325 mesh. The surface of the welding-resistant part 2 is higher than the arc-resistant Surface of part 1. On the upper surface of the arc-resistant part 1, there are three circular parts 3 with small cut-off value embedded around the anti-fusion welding part 2. The material is AgWC alloy, the weight percentage of Ag is 2%, the thickness is 7mm, and it is flat with ...