1, Load feature
  
  There are two parts on plastic film blowing machine can get energy saving:
  (1)  Power driven system, most of this part will install an additional frequency inverter, which make the main motor works at
         30~40Hz to get energy saving;
. (2)  Heating system, most of this part will install an electromagnetic heater to get energy saving.

2,  Requests for frequency inverters (VSD)
  (1)  Output high torque at low frequency.
  (2)  High speed control accuracy. (to avoid the raised grain occurs on the film).

3, Instruction for commissioning
(1)  Pictures of plastic film blowing machine


(3)  Typical wiring diagram