1. Main characteristics of electric apparatus:
● adopt the large scale digital integrated chip, the function is strong, the precision is high. 
● mechanical and electrical integration design, small size and light weight. 
●Using professional pressure sensor to measure the torque of the output shaft, so the accuracy of the torque measurement is improved, the error rate is less than 5 % and can be dynamically monitored, the torque is displayed, and the locked rotor can alarm.
●The displacement sensor uses the hall sensor, and the pulse signal digital quantization processing, so the basic error of valve positioning accuracy is level 1 accuracy. 
● the function, parameter setting, commissioning and on-site electric operation of the executive mechanism are set through the hand-held infrared remote control without opening the lid. 
●All Chinese and character display, menu operation, intuitive and clear, easy to learn, easy to understand, easy to operate. 

2. Function of electric appliance:
● Travel limit protection function
● Moment limit protection function 
● state indication contact function
1 ) midway limit 2 ) the electric device is turning on 3 ) the electric device is closing 4 ) the electric device is running 5 ) Stop in locally ( 6 ) control in locally 7 ) remote control 8 ) Open valve interlocking  9 ) Shut - off valveinterlocking 10 ) Hand wheel operation 11 ) Open - valve torque breaking 12 )Shut - off valve torque breaking 13 ) operation of valve torque breaking operation

Valve alarm function
1 ) Over - torque alarm function A, Off - direction torque B, On - direction torque 
2 ) the locking rotor alarm function A, OFF - direction locking rotor B, On - direction locking rotor 
● control alarm function 1 ) emergency ( ESD ) alarm protection 2 ) fault signal protection
●  implementation of the agency's alarm function
1 ) motor overheating protection 2 ) control box overheat protection 3 ) battery low protection 4 ) internal system fault protection 6 ) internal system fault protection 7 ) current valve position signal loss protection 8 ) in - place wiring fault alarm1 ) motor overheating protection 2 ) control box overheat protection 3 ) battery low protection 4 ) internal system fault protection 6 ) internal system fault protection 7 ) current valve position signal loss protection 8 ) in - place wiring fault alarm

● instantaneous reverse protection function  ● local control inching / self - keeping selection function
● contact mode selection function    ● external interlock protection function   ● condition control protection function
● two - wire control protection function    ● torque bypass protection function   ● ESD override protection function   ● interrupt setting function
● additional indicator contact function   ● remote control setting function    ●executive mechanism display function  ● automatic distinguishing function of three - phase power supply phase sequence