PLC control panel-soft-starter/inverter

n The compressor has a good function of protection and auto-controlling , the machines use PLC programmable controller, advanced skill, liable, safety, high auto-degree, it realizes opening, stopping, loading, polluting automatically and has the function of hand motion. The key parts of controlling device use the programmable controller , text display(TD-200) and AC electromagnetic contactor of international famous brand S7-200(SIEMENS), and the thermorelay comes from Schneider company in France. n The pressure and temperature of compressor can display and alarm,and the machines choose the programmable controller(Siemens S7-200 in German),it has 24 types of input switches, 12 types of imitated output,16 types of output switches; Text display includes English operation system which is monitoring and operating each states through the operation push-button on operation system(transmitter, solenoid valve and controlling board). n The skill standard in China is advanced, and the assignment of PLC controlling system is as follows: n PLC controlling cabinet consists of major loop and controlled returning circuit. And the major loop consists of plastic- covered circuit breakercontactorsoft starter. controlled returning circuit consists of PLC(CPU224A/D moldTD200 display)electric resource switchcentral relaypush-buttondirectional lightsvoltage metercurrent meter, and the method of starting the main machine is the soft starting, the main motor will be delayed after starting the oil injected pump. n It has the stopping function of faults alarm. n It is convenient and easy to design and regulate the technological parameter and suit the change of actual operated mode. n It can state both workingmode(hand-operation and auto-operation). n And the starting of compressor is the soft starting n The main machine will be delayed after starting the oil injected pump Automatic modecontrol the compressor to start, loading and circulating automatically, the pressure and temperature of technological gas have the stopping device of auto-protection n PLC board can diagnosis faults(the setting of controlling machines and the display of circulating parameter). · Safety and control l Over/lower-pressure protection for inlet pressure of the ccompressor l Over- pressure protection for every stage discharge pressure l Over temperature protection for last stage outlet of temperature l Lower-pressure protection for lubricating oil pressure l Over-pressure protection for cooling water pressure l Over-load pretection for the motor /generator of compressor Push button for: l restart of compressor after emergency shut-down l emergency shut-down Motor starter system Soft starter