Design method of isolating switch operated from side

Abstract

The invention discloses a design method of an isolating switch operated from a side, belongs to the field of power equipment, and specifically relates to a design method of an isolating switch operated from a side. The design method comprises the following steps: providing a contact room, a handle arranged on a side of a switch, and wiring terminals connected with a static contact; arranging a connecting column on each wiring terminal to make the connecting column partially embedded into the wiring terminal and in interference fit with the wiring terminal; and arranging a conductive first columnar part in interference fit with a power bus-bar on each connecting column, and coaxially arranging a conductive second columnar part inside the first columnar part to make the first columnar part and the second columnar part in interference fit, wherein the thermal expansion coefficient of the second columnar part is greater than that of the first columnar part. The design method disclosed by the invention has the following beneficial effects: (1) a larger conductive area is produced under the condition of same lap joint length, so the current density is reduced, and low temperature rise of the wiring terminal is achieved; (2) bus-bar consumption is reduced, and resources are saved; and (3) the electrical clearance or safety distance is increased, and the electrical safety of equipment is improved.

Description

technical field [0001] The invention relates to the field of electric equipment, in particular to a design method of a side-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 l...

AI Technical Summary

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

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