SOLUTION

Pumps and Fans
Kinda varialbe frequency inverter applied in pumps and fans


1, Load feature
  (1)  Both of them belong to fluid control.

  (2) If without VFD, the fluid is controlled by valve or baffles;
  (3) For less fluid required system, there will be more energy saving.
  (4) In theory, if the running frequency is H1, then

        Energy Saving = 1-(H1/50)3
.
2,  Requests for frequency inverters (VFD)
  (1) Soft start the motor, reduce the surge current.

  (2) VFD should work continuously without fault.
  (3) Speed tracking and start (flying start) function should be reliable.
  (4) In some systems, PID function is required.

3,  Real example
    In a hotel, there is an central air-conditioner, the cooling fan is one PCS of 15kW motor, in one year,
    it runs 4000h, 2000h with the air flow of 85%, 2000h with the air flow of 60%.

  

4,  Typical wiring diagram



 
5,  Parameters setting list

No.Function codesDefaultSetting valueExplanation
1F0-0201External start / stop signal
2F0-0311, 2, 3, 4The motor speed is adjusted by potentiometer or external analog signal.
3F0-17Model depend20sSet the acceleration time based on real request
4F0-18Model depend20sSet the deceleration time based on real request
5F1-1001Coast to stop (if necessary)
6F1-0001Speed tracking and restart
(if customers want to restart running motor)
7F6-0222Fault output

6,  Notice
     Maintenance regularly, pay attention to dust and humidity prevention.


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