Mine vacuum electromagnetic starter coal mine power supply system is the key equipment

Mine vacuum electromagnetic starter is one of the key equipment in coal mine power supply system, it directly affects the reliability and safety of coal power production system, so the development of high  Voltage stabilizer  electromagnetic starter has a very important  Circuit breaker . In the development of multi-loop vacuum mining electromagnetic starter controller, enabling multiple combinations of mine control and protection of large two-speed or single speed motor. Mine development and current  mcb circuit breaker  electromagnetic starter. For motor overload protection established motor heating, cooling mathematical model, proposed the use of software to simulate the temperature rise of the protection methods; analyzing the characteristics of small ground fault currents based on the application of the principle of zero sequence power direction herein Select grounded branch; addition, overvoltage, undervoltage were analyzed and the corresponding protective measures. According to the site conditions, determine the control mode controller, developed a general scheme of the controller.