Design method for dual-power electric change-over switch

Abstract

The invention discloses a design method for a dual-power electric change-over switch, belongs to the field of electrical equipment, and in particular relates to the design method for the dual-power electric change-over switch. The design method comprises the steps of arranging an electric operating mechanism provided with an electromagnet and a triggering button, and a contact chamber provided with two power supply wiring terminals and a load wiring terminal; arranging a linking post on each wiring terminal, thus allowing the linking post to be partly embedded into the wiring terminal and in interference fit with the wiring terminal; and arranging a first conductive columnar part in interference fit with a power bus on each linking post, and arranging a second conductive columnar part in the first columnar part in a coaxial manner, and thereby the first and second columnar parts being in interference fit with each other, and the thermal expansion coefficient of the second columnar part being more than that of the first columnar part. The design method disclosed by the invention has the advantages that 1, the more conductive areas are generated with the same splicing length, so that the current density is reduced, and the low temperature rise of the wiring terminal is achieved; 2, the consumption of the buses is reduced, and the resources are saved; and 3, the electric clearance or safe distance is increased, and the 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 dual-power electric transfer switch. Background technique [0002] In the existing power complete equipment factory, the construction workers install the dual-power electric transfer switch in the power distribution cabinet. The terminals of the dual-power electric transfer switch are usually directly connected by the power busbar, and the power busbar is directly connected to the terminal. The connecting terminal and the power busbar are usually overlapped and lapped, 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 u...

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 dual-power electric transfer switch

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