DeLaval Robotic Milking System powered by  POLYPHAZ  single to three phase converter

Hicks V.M.S dairy required three phase power to operate the DeLaval Automatic Milking system in Denmark Western Australia.

Three phase power was many kilometres and many thousands of dollars to get connected making the venture nonviable, that’s where the POLYPHAZ converter fits in with its high efficiency design , serviceable in the field and proven track record in the dairy industry, some of the key features are as follows:

• High efficiency – low loss design and high power factor to minimise power costs and access the maximum supply transformer capacity, Typically 98%
• No Harmonics – means higher efficiency.
  • lower power costs.
  • no premature failures of V.S.Ds.
  • No line chokes required
  • No series reactors required
  • No screened cable required
• Excellent output voltage – stabilization and asymmetry as required by A.M.S systems
• H.M.I panel – to provide feedback to diagnose faults
• Field serviceable – We do  NOT  use a “ All IN ONE ” packaged controller, this makes life easier for the manufacturer but life harder for the end user .. if one item fails you have ONE option take it back to the manufacture.
• Individual components – making it field serviceable and reducing valuable downtime & costs, ie: capacitor switching – power supply – transducer – microprocessor.
  • As specified by major O.E.Ms and Govt authority’s
• Site condition adaptable – parameters, values and even programs can be adjusted on site to suit field conditions if required.
  • As specified by major O.E.Ms and Govt authority’s
• Proven capacitor contactor switching – with current limiting and 5th harmonic resonance coils for proven long life to meet the challenges of rural power conditions.
• Short circuit fault rated – in the event of downstream short circuit faults , Thermal, short circuit, lightning, over voltage protected.

Download POLYPHAZ converter PDF information here

Robotic dairy farm, Mt Gambier South Australia powered by  POLYPHAZ   single phase to three phase rotary converter.

Mt Gambier dairy farm South Australia

This Automated dairy runs 24/7 and as such reliability, easy site fault diagnosis, and low power consumption, Vermin proof  were all on the top of the list for this type of application.

Installed at Mt Gambier South Australia, this had a high specification with regards to three phase and single phase power output voltage , power consumption / losses,  and short circuit fault rating.

“The POLYPHAZ  unit is running very quiet and is much quieter than the small 2.2kW Vacuum pumps that are in the same room as the Polyphaz unit. The Dairy Farmer is very impressed with the unit.”     15/9/2011

Site test results taken by  15/9/2011 , model: R37/480C:

Three phase output voltages

L1  >  L2	418 VAC
L1  >  L3	429 VAC
L2  >  L3	426 VAC

Single phase voltages (neutrak option fitted)

L1 > Neutral	237VAC
L2 > Neutral	244VAC
L3 > Neutral	243VAC

Load snapshot

Input power consumption:  L1: 26amps , L2: 25amps @ 479volts

Input 1 phase watts:  W= V x A x P.F   = 479 x 25.5 x .99 = Watts: 12092.35

Output power consumption: L1: 13amps, L2: 18amps, L3: 16amps , averaged: 15.7amps

Output 3 phase watts: W= V x A x P.F x 1.732 = 424 x 15.7 x .99 x 1.732 = Watts: 11414.28

12092.35 – 11414.28 = 678 watts

Results

3 phase output voltage asymmetry	2%
1 phase voltage asymmetry ( neutrak option fitted)	2%
Loaded converter losses	678 watts
Efficiency loaded	95%>98%
unloaded converter consumption	455 watts
Short circuit fault rating	25 KA
Power factor	.99
C-Tick approved	yes

These results are impressive, particularly the low power consumption from a 37KW or 50HP capacity rotary converter capable of 6 x F.L.C multi motor starting, the end user gets the benifits of a rotary converter without the downside of power consumption, this is achieved by using our unique F.P.R rotary technology ( floating pole rotary )  and maintaining the Power Factor at unity throughout the load spectrum while maintaining a relitively high fault rating of 25 KA.

A high short circuit fault rating is important and often overlooked particular in larger installations like this, for example if a fault accures downstream of the converter and the converter is supplied by say a 100 KVA transformer with a high fault level a low fault rated converter serves as a expence fuse in the event of a short circuit fault.