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Design method for front-operated disconnecting switch

A technology of isolating switch and design method, which is applied in the direction of electrical components, contact electrical connections, circuits, etc., can solve the problems of increasing the amount of busbars, increasing the manufacturing cost, and increasing the size of the isolating switch, so as to reduce the current density, The effect of reducing the dosage and increasing the electrical clearance or safety distance

Inactive Publication Date: 2016-07-20
龚雅丽
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And increasing the overlap length will increase the amount of busbars, thereby increasing the manufacturing cost
The fastening bolts will reduce the electrical clearance or safety distance between conductive parts and non-conductive parts. In order to keep the electrical clearance or safety distance unchanged, it is necessary to increase the distance between the terminal and the non-conductive Large spacing will inevitably result in larger dimensions of the entire isolating switch

Method used

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  • Design method for front-operated disconnecting switch
  • Design method for front-operated disconnecting switch
  • Design method for front-operated disconnecting switch

Examples

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Embodiment 2

[0070] In the first embodiment, the material of the first columnar part 1 is changed to a copper alloy, and the material of the second columnar part 2 is changed to an aluminum alloy. Since the hardness of the alloy is relatively high, the second columnar part 2 can be placed in a low temperature environment ( 5 degrees) for a period of time (5 minutes), while the first columnar part 1 is stored for a period of time (5 minutes) in a high temperature environment (80 degrees), with the help of the effect of thermal expansion and contraction, the inner diameter of the first columnar part 1 Slightly larger, while the outer diameter of the first columnar part 1 is slightly smaller, and then the second columnar part 2 can be easily assembled into the first columnar part 1. After the assembled connecting column returns to normal temperature, the first columnar part 1 Interference fit with the second columnar part 2 can be realized. The diameter and length of the connecting column dis...

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PUM

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Abstract

The invention discloses a design method for a front-operated disconnecting switch, and belongs to the field of electrical equipment.The front-operated disconnecting switch comprises a contact chamber, a handle arranged on the front face of the switch, and wiring terminals connected with fixed contacts.Each wiring terminal is provided with a connecting column, wherein the connecting column part is partially embedded into the wiring terminal and is in interference fit with the wiring terminal, a first conductive columnar part in interference fit with a power busbar is arranged on the connecting column, a second conductive columnar part is coaxially arranged in the first columnar part and is in interference fit with the first columnar part, and the thermal expansion coefficient of the second columnar part is larger than that of the first columnar part.The design method has the following advantages that more conductive area is generated on the premise of the same overlapping length, then current density is reduced, and low temperature rise of the wiring terminals is achieved; the number of busbars used is reduced, and resources are saved; electric clearance or safety distance is enlarged, and electrical security of the equipment is improved.

Description

technical field [0001] The invention relates to the field of electric equipment, in particular to a design method of a front-operated isolating switch. Background technique [0002] In the existing power complete equipment factory, construction workers install the isolating switch in the switch cabinet. The terminals of the isolating switch are usually directly connected with the power busbar, and the power busbar is directly connected to the terminal, and the terminal is connected to the power busbar. Usually the overlapping method is used, and then fastened with bolts. Such as image 3 and Figure 4 As shown, this connection method needs to overlap the busbar and the terminal by a certain length, so that the current density of the contact surface can be maintained within a certain range, so that the temperature rise at the connection can meet the relevant standards. In order to reduce the temperature rise at the joint, it is usually necessary to increase the overlapping ...

Claims

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Application Information

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IPC IPC(8): H01H1/58H01R4/26
CPCH01H1/58H01R4/26
Inventor 不公告发明人
Owner 龚雅丽
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