Large current three-position double-fracture disconnecting switch

An isolation switch, three-station technology, applied in the direction of the switch where the bridge contact is not connected, can solve the problems of reducing the current carrying capacity, no corresponding tightening, loose moving knife, etc., to improve the current carrying performance, reduce the difficulty of assembly, Uniform force effect

Inactive Publication Date: 2013-09-04
BEIJING HEZONG SHIKE ELECTRIC POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] like figure 1 As shown, the shaft and the moving knife are connected by an arc-shaped drawing plate, which not only makes the structure of the isolating switch more complicated, but also increases the manufacturing cost; figure 2 As shown, the contact between the movable kni

Method used

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  • Large current three-position double-fracture disconnecting switch
  • Large current three-position double-fracture disconnecting switch
  • Large current three-position double-fracture disconnecting switch

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specific Embodiment

[0028] Such as image 3 As shown, the 1250A high-current three-position double-break isolating switch has a three-position double-break structure. Compared with the 630A isolating switch, the fracture is more obvious, which increases the breaking performance of the isolating switch. Among them, the moving knife is a double gate structure, and the rotation angle of the main shaft is 60 degrees. Its operation process is:

[0029] When the knife rotates to such as Figure 4 When the position is shown, it is in the closed state;

[0030] When the knife is turned to such as Figure 5 In the position shown, it is the opening state;

[0031] When the knife rotates to such as Figure 6 In the position shown, it is grounded.

[0032] The arc-shaped pull plate is canceled as an intermediate transmission part. Compared with the 630A disconnector, the structure of the 1250 disconnector is more integrated, which reduces the difficulty of assembly.

[0033] Such as Figure 7 As show...

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Abstract

The invention discloses a large current three-position double-fracture disconnecting switch. The large current three-position double-fracture disconnecting switch comprises moving cutters, a ground row, fixed contacts and moving cutter supports, wherein moving contact ends are arranged at the two ends of each moving cutter, each moving cutter comprises two contact pieces, and inner sides of the moving contact ends of the every two contact pieces are respectively provided with a contact face. The outer sides of the moving contact ends of the every two contact pieces are respectively provided with a magnetic locking plate, the moving contact ends and the magnetic locking plates of the every two contact pieces are connected through a bolt, and a belleville spring is arranged on the outer side of each magnetic locking plate. An arc-shaped pulling plate which is taken as a middle transmission component is eliminated, assembling difficulty is reduced, stress-bearing in contact is more even, and meanwhile current-carrying performance of the moving cutters are improved.

Description

technical field [0001] The invention relates to an isolating switch, in particular to a large current three-position double-break isolating switch. Background technique [0002] Isolating switch is the most widely used electrical appliance in high-voltage switchgear. Its working principle and structure are relatively simple. The impact is relatively large. [0003] Such as figure 1 As shown, the isolating switch in the prior art is a three-station single-break structure, and its operation process is: [0004] When the movable knife rotates to the position of the copper bar in the arc extinguishing chamber, it is in the closed state; when the movable knife rotates to the supporting position of the movable knife, it is in the open state; when the movable knife rotates to the contact position, it is in the grounded state. [0005] There are at least the following disadvantages in the above-mentioned prior art: [0006] Such as figure 1 As shown, the shaft and the moving kn...

Claims

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Application Information

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IPC IPC(8): H01H31/16
Inventor 刘元东关世龙冉堃
Owner BEIJING HEZONG SHIKE ELECTRIC POWER TECH
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