Power harmonics .. problem solved.

Bantry bay vineyard – Margaret river Western Australia.

They needed to upgrade the irrigation to 3 x 22kw pumps operated via one of the existing VSDs to control pressure and needed to utilise the full capacity of the supply transformer , we offered the R/75/480U rotary converter to convert the 480VAC single phase supply to 415 volt three phase to supply a “off the shelf pump system” with standout results in the form of efficiency, voltage & current asymmetry with none of the effects of harmonics apparent.

How we achieved these results:

• Six stage VolTrak system, that ensures high efficiency through good voltage asymmetry throughout the load spectrum.
• Floating pole rotaries ( FPRs ) coupled with modified rotors ensure:
  1) High efficiency
  2) Low circulating currents
  3) Lower power costs
  4) Low harmonics throughout the load spectrum, THDV < 3% and THDI < 8% under full load.
  5) High power factor, typically  0.99
• NO high speed electronic switching devices used to switch capacitors.

 

Input readings

Supply voltage no load:	481volts
Supply voltage full load:	481volts
Full load current @ 465volt single phase:	150amps

Output readings

Output voltage asymmetry
L1>L2    409
L1>L3    403
L2>L3    395

Pump 1 current reading	Pump 2 current reading	Pump 3 current reading
L1    34amp	L1    37amp	L1    34amp
L2    32amp	L2    32amp	L2    34amp
L3    34amp	L3    36amp	L3    34amp

Harmonic report

Taken under full load: THDV , 3rd. 5th, 7th harmonic

These readings indicate minimum  harmonic distortion, thereby accessing the full KVA supply capacity and minimal losses.

 

Bantry Bay revisited 2013

After 13 years of operation and a replacement of the pump controller the POLYPHAZ converter in still in use visit our YouTube site to review: