Mine Explosion-Proof And Intrinsically Safe Low-Voltage Ac Soft Starter

This product is mainly used in coal mines and other explosive gas environments containing methane and coal dust mixtures in the surrounding medium. In a power supply system with an AC 50Hz and a rated voltage of AC1140V or AC660V, it can perform various forms of soft starting (such as current limiting, voltage ramp, power torque ramp, etc.) for 2 or 4 three-phase squirrel cage motors with a current below 400A. This device uses PLC as the control core and a 7-inch Chinese touch screen as the human-computer interaction interface, which can be networked with the ground control center to achieve centralized control.

Technical advantages and functional features
1. The soft start controller is adopted, and the soft start performance is stable and reliable, and it has dual protection of soft start and direct start;
2. The starting parameters can be flexibly set according to different loads to obtain the best current curve and the best torque control characteristics;
3. The starting current can be adjusted according to the load to reduce the starting loss and generate the best torque with the minimum current;
4. The equipment pilot circuit is an intrinsically safe circuit, which can effectively prevent the occurrence of spontaneous starting accidents caused by short circuit or grounding of the control line;
5. The PLC is used as the control core, which can easily realize network centralized control and support industrial Ethernet communication;
6. The embedded human-machine interaction interface can display the operating conditions of each unit, such as motor current, voltage and fault status, and has the function of fault record query;
7. Each drive circuit has an independent monitoring and protection unit, which is not affected by each other, and only transmits data and instructions to the upper-level PLC core unit through the bus ring network. It has the advantages of high automation, convenient and intuitive human-machine dialogue, stable performance, sensitive protection, and reliable action;
8. Each unit of the equipment adopts drawer plug-in type; it has good interchangeability;
9. Intrinsically safe keyboard operation, convenient and beautiful;
10. It has RS485 communication interface and Ethernet communication interface, and adopts standard Modbus communication protocol.

Main technical parameters