Internal circuit breaker auxiliary contacts Accessories: main circuit breaker points, mechanism mechanically linked contacts vacuum circuit breakers, circuit breaker is mainly used to display the status of co-Hengshui vacuum circuit breakers, connected to the control circuit breaker By switching the circuit breaker, and its related electrical control over or interlock. For example, the output signal to the lights, relays. MCCB frame degree rated current 100A single break changeover contacts Shijiazhuang vacuum breaker, 225A and above the bridge contact structure for Langfang vacuum circuit breakers, thermal current of 3A; frame degree rated current 400A and above can be installed two normally open, two normally closed, Conventional thermal current of 6A. The total number of operational performance and operational performance of the circuit breaker the same number of times. Alarm contact: Shunt release: undervoltage release: high voltage vacuum circuit breaker selection principles 1. General principles in order to ensure high-voltage electrical appliances, under normal operation, maintenance, short circuit and over-voltage conditions safe, high-voltage electrical appliances should be Select the following conditions: ① normal operating conditions including voltage, current, frequency, mechanical loads such as short-circuit conditions, including selection ② Press short time withstand current, peak withstand current, closing and breaking current and other options; ③ by environmental conditions, including temperature, humidity, altitude, earthquakes and other options; ④ Press withstand overvoltage capabilities include insulation level and other options; ⑤ protection characteristics according to the different characteristics of various types of high-voltage electrical switches, including operational performance, with fuses, transformer load and accurate grade and other options. 2. Select the normal operating conditions voltage electrical short-circuit stable condition 3. Select the high-voltage electrical short circuit stability check ① ② short-circuit current of the general requirements of the thermal effect ③ short circuit stability check environmental conditions 4. 5. Select the voltage electrical high-voltage electrical The insulation level 6. Press the different characteristics of various types of high-voltage electrical choice welcome to inquire! Shijiazhuang vacuum circuit breakers, vacuum circuit breakers, power is supplied by the Xi'an Huayi Huayi power plant. Xian Huayi power plant (www.xahy.com) strong, credible, in Xi'an high-voltage circuit breakers and other industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Huayi power and you hand into the brilliant, for a better future!