Switch cabinet circuit breaker handcart and grounding knife switch electric controller

Abstract

The invention discloses a switch cabinet circuit breaker handcart and grounding knife switch electric controller which comprises a power supply and communication interface circuit and an interlock switch input circuit. The power supply and communication interface circuit is arranged on an independent circuit board and the output comprises a first circuit and a second circuit. The interlock switch input circuit is in lighting connection with a microprocessor circuit through an internal luminous tube of an optoelectronic coupler. The microprocessor circuit comprises a liquid crystal screen display circuit. According to the invention, electric switches are adopted to turn on and turn off the circuits, so that the problems of tough turning-on and turning-off of the circuits are avoided; a perfect man-machine interaction interface is arranged, the functions of state checking and the like are realized, and direct management is convenient; and finally, the switch cabinet circuit breaker handcart and grounding knife switch electric controller is provided with a perfect circuit protection function, a mechanical protection function and the like, so that sever safety risks such as firing which are caused by a short circuit of a motor circuit are prevented, and the safe and stable mechanical operation is ensured.

Description

technical field [0001] The invention relates to an electric controller, in particular to an electric controller for a switchgear circuit breaker handcart and a grounding switch. Background technique [0002] The existing electric control of switchgear circuit breaker handcart and grounding switch has the following schemes: [0003] (1) It consists of multiple relays, contactors, and interlock contacts connected by wires, but this solution has complex circuits, high cost, poor control accuracy, difficult maintenance, and difficult to change the interlock logic; [0004] (2) Using programmable logic controller (PLC), compared with (1), there is a big improvement, and soft logic is realized. However, PLC is a general-purpose controller that can only implement soft logic, and additional actuators such as contactors, relays, etc. are required, and hard contacts are used to realize the on-off of the circuit, which has poor safety and high cost; [0005] (3) Developing a dedicate...

AI Technical Summary

Problems solved by technology

However, PLC is a general-purpose controller that can only implement soft logic, and additional actuators such as contactors, relays, etc. are required, and hard contacts are used to realize the on-off of the circuit, which has poor safety and high cost;

[0005] (3) Developing a dedicated controller with a single-chip microcomputer is the most optimized control scheme. There are many kinds of dedicated controllers on the market, but there are shortcomings. When the logic contact state is opposite, there is no way to solve it; some lack electronic switches to control the motor circuit, and use hard contacts to turn on and off the motor circuit; some lack sufficient circuit protection functions, and the output voltage cannot be disconnected in time when abnormalities such as circuit short circuit occur And cause dangers such as circuit fire; some do not have soft logic, need external wires to connect hard logic, complex wiring and difficult maintenance

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