Introduction combination switch applicable to explosive gas and dust in the mine; rated voltage 1140V AC 50Hz power supply system can be for 2-4 sets of 590kW and below-capacity three-phase AC induction motor or 2-4 sets of 590kW and The following capacity two-speed motor to start, stop and speed control switch, and is able to protect the motor and associated circuitry. Product Attributes main features: 1 PLC and Chinese LCD display GOT, parameter setting is simple and convenient to protect sensitive and reliable; screens simple and intuitive. 2 with standard RS232/485 communication interface. 3 with the flow, short circuit, under voltage, over-voltage protection features, phase failure, phase unbalance, leakage atresia. 4 fault memory and fault queries. Other notes The main technical parameters: 1 Rated voltage: 1140V 2 single branch Rated current: 400A 400A 3 combinations: 6 loop 4 Explosion-proof type: flameproof and intrinsically safe product logos No. 5: Exd (ib) Ⅰ 1140V 6 Certificate of Conformity: 1092688G7 product logo No.: Exd (ib) Ⅰ 1140V8 security Zhunyongzheng No.: MAD090490 transaction description Tyan Zhongcheng Mine Automation Co., Ltd. Contact: Mr. Wang Tel 0538 -8936866 Address: High-tech Zone in Tai'an Spark Technology Park Avenue Tianmen price is negotiable