Study And Design On Intelligent Synthetic Protector For BZGK2 High-Voltage Switchgear

The coal mine shaft high tension line by 6KV power supply primarily, the 6KV explosion-proof switch is the essential device of the mine pit power supply system, its responsibility is to provide the electrical energy for the working surface and the tunneling surface work machinery. The former high-voltage switch synthesis protective device completes the protection circuit by using the analogous circuit mostly, the intellectualized function lowly, the function of protection to be unitary, moves by mistake and resists to move sometimes occurs. With the rapid development of the microcomputer technology, the monolithic microcomputer obtained the broad application in the automatic control domain by the merits such as the small volume, the low price, the nimble application and so on. Well completed carry on the processing to the multichannel signal by taking the monolithic integrated circuit as the core high-voltage switch intelligence synthesis protector, it enables the protection function enhance, at the same time it has reduced the cost of the protector effectively. The highly explosive switch intelligence synthesizes protector is high-powered. The application has the important practical significance to improve the power supply quality, to safeguard the personal safety, to perfect electrical network protection.This paper introduced the development which carried on to the BZGK2 high-voltage switch intelligence protector thoroughly, it produced the mentality of low cost entire function 6kV to guard against explosions which the switch the comprehensive protector designed. The BZGK2 series protector take the middle-grade 51 series monolithic integrated circuits as a core, it can automatically judge short-circuits, the overload, pressure, leakage breakdown and so on appeared in the line and it carries on the real-time monitor to the high tension cable insulation level, it has the convenient two-parameters enactment and the entire Chinese liquid crystal display function.The BZGK2 protector to the sensor take two exchanges signals sampling, the measured signal approaches to the real value, it had guaranteed the examination is accurate. At the same time this protector complete all signals recognition within 20 ~ 40ms, this is much lower than the time of the JB8739-1997 standard enactment, it well solves the problems of short-circuit, creepage and so on jumped the ranks trips.The reasonable circuit design and the strong anti-jamming enable the BZGK2...