Electronic intelligent precise angle selection control device

Abstract

The invention discloses an electronic type intelligent precise angle selective control device which has the advantages of being high in performance and reliability, compact, free of maintenance, intelligent and the like.A single-chip microcomputer is used for controlling the conduction angle of an antiparallel thyristor between a power source and a load, and switching-on can be achieved at the appropriate angle of 0-180 DEG C.An optical switching-on device can adapt to a high-frequency operation site and has the high overload capacity, strong electromagnetic compatibility and low self loss.In the aspect of achieving high reliability, the precise control function and the rapid fault protection function are achieved through a high-end digital processing technology, and strong communication reliability is achieved under an embedded type digital platform.In addition, by means of the way of installing a bypass contactor internally and the advanced material and technology, product miniaturization is achieved, electric arc division and combination are avoided, and the unit volume current ratio of the product is better than that of like products.

Description

technical field [0001] The invention relates to an intelligent detection instrument for low-voltage electric appliances. Background technique [0002] In the power grid system, the initial phase angles of the system voltage and current at the moment the circuit breaker is closed are usually random and uncertain. This is not only detrimental to the equipment itself and maintenance in the grid system (affecting the insulation and life of the equipment), but also affects the voltage stability of the grid system, induces malfunctioning behavior of relay protection, and increases maintenance workload and maintenance costs. When inductive loads (no-load transformers, shunt reactors, etc.) are switched on, if the phase of the circuit breaker is not properly closed, a large inrush current will be generated, causing an instantaneous voltage drop, resulting in system voltage fluctuations and protective relay malfunctions; The overvoltage and inrush current when the load (no-load tran...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the short-circuit current of different levels such as 15KA, 30KA, 50KA, 120KA and other short-circuit test currents of circuit breakers, the phase selection devices currently on the market adopt a mechanical form, mainly composed of two parts: a switch and a control box. The switch adopts a single design. Using six vacuum interrupters to work in parallel, the device has a large volume, poor control accuracy ≦±3.6°, large vibration when opening and closing, poor reliability, heavy equipment maintenance workload, and regular maintenance

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