Research On Explosive-proof Intelligent Vacuum Feed Switch Based On Permanent Magnetic Actuator

Vacuum switch is widely used in the switch system and some other fields. It can be used for switching on and off the power system, monitoring the system to protect it from the malfunctions. Permanent magnetic actuator, synchronous closing and single chip technique are applied in the protection of vacuum switch. Using the principle of computer's protective relaying in power system, a new kind of vacuum feed switch based on permanent magnetic actuator is developed, carrying out the functions of protecting, controlling, measuring, displaying, fixing, communication and self-diagnosis. This intelligent supervisory device with systems of communication and malfunction search has some functions such as earth leakage, short circuit,overload,phase failure,over-voltage,under-voltage and so on, displaying the operating and failure status by LCD, and installing the system of error inquiry and communication. This paper analyzes the problem of magnetic compatibility for the device. The intelligent supervisory device applies in vacuum switch, improves the whole performance of the electrical equipment highly and makes a bright future for the intelligent supervisory computer used in power system.