A low-voltage and high-current phase selector switch with symmetrical structure

Abstract

The invention discloses a low-voltage and high-current phase-selection switch with a symmetrical structure, which includes a chassis on which a busbar support frame and a plurality of three-pole switching unit groups with the same structure are installed; the busbar support frame is equipped with incoming line convergence A busbar group, an outgoing line converging busbar group, an incoming line shunting busbar, and an outgoing line shunting busbar; connected; the outgoing line busbar group is connected with the unit outgoing line splitting busbar of the three-pole switching unit group through the outgoing line splitting busbar; the incoming line combining busbar group and the outgoing line combining busbar group are arranged horizontally. The three-pole switching unit and the center plane of the middle incoming busbar are symmetrical, and the low-voltage and high-current phase-selection switch with a symmetrical structure reduces its own impedance and increases the loop current by at least 10%; the short-circuit capacity of the switch can reach 200kA , the short-circuit duration is 2s; the standard design of the incoming and outgoing lines of the phase selection switch is convenient for customers to install on-site and connect the test products.

Description

technical field [0001] The invention relates to the technical field of low-voltage electrical appliances, in particular to a low-voltage and high-current phase selection switch with a symmetrical structure. Background technique [0002] Low-voltage and high-current phase selector switches have been widely used in electrical test systems and low-voltage power supply and distribution systems. The equipment plays a key role in the low-voltage electrical testing system, effectively improving the testing efficiency and ensuring the quality of testing. The application of the phase selector switch in the power supply and distribution system solves the problems of closing inrush current, overvoltage breakdown, and re-ignition when switching the parallel capacitor bank. The electronic synchronous closing control technology, phase selection control technology, and a large number of sensors are applied to the low-voltage and high-current phase selection switch, which can effectively r...

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