A three-choose-one load changeover switch module

Abstract

The invention discloses a one-out-three load transfer switch module. The module consists of a CPU and a drive circuit (6), switching devices J1 and J2, a position detection circuit (1) corresponding to the switching device J1, a position detection circuit (2) corresponding to the switching device J2, a switching device J3 and a position detection circuit (3) thereof, a silicon controlled rectifier (4), a resistor R and a capacitor C, a communication interface (8), a voltage detection circuit (7) and a load (5). The switching device J1 and the switching device J2 are bistable magnetic latching transfer switches; and the switching device J3 refers to a bistable magnetic latching switching device or a monostable normally-closed switching device. The one-out-three load transfer switch module disclosed by the invention is high in switching capacity and long in service life, and 100000 times of service lives can be guaranteed at least under the rated load in a full-temperature range. With the adoption of the magnetic latching structure, the one-out-three load transfer switch module is low in power consumption and small in size. A connection mode of the J1, J2 and J3 is adopted, and the short circuit of the customer power supply can be avoided at any time.

Description

technical field [0001] The invention relates to a three-select-one load transfer switch module, which belongs to the technical field of power electronic switches. Background technique [0002] In the field of power system and industrial control, it is often necessary to switch the single-phase load to one of the three phases A, B, and C at any time. A low-voltage power load intelligent distribution system and its distribution method disclosed in the publication number CN 103545826 involve This kind of switch module is needed for unbalanced three-phase load control. [0003] In order to improve the reliability of the power supply of single-phase electrical equipment, multiple power supplies may be required as backup, and this type of switch module is also required. [0004] In transformer voltage regulating equipment, in order to stabilize the voltage of the electric load power supply, it is necessary to continuously adjust the power taps, and this type of switch is also req...

AI Technical Summary

Problems solved by technology

[0009] 4. Large switching capacity;

[0011] Switches that can meet the above stringent requirements have never been reported or used in products at home and abroad.

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