The shell of the combination switch is cuboids with quick-actuating closures structure. Reliable mechanical interlock and electric interlock system will ensure closure actuated after power cut off. Each unit of the switch is modular structure in drawer plugged style.
The core control unit is Siemens PLC and has functions like programmable live and expandable points of output and input. Network communication is easy to establish with various functions such as telemetering, telecommunication, telecontrol, teleregulation called “4T”. Unattended working faces and concentrated detection and monitoring from ground control can be realized with functions above.