POLYPHAZ Single to three phase rotary converters
Narkoojee Wines Gippsland Victoria
A R37/480a was used to power all three phase equipment on site via a 25 KVA 2 wire supply transformer from Powercor, three phase equipment used are:
Vintek wine press , refrigeration to chill wine, bottling and wine processing equipment.
Reading taken on site 27/7/2011
Supply input voltage at converter under load: 481 volts single phase
Output three phase voltage from converter under part load:
L1 > L2: 414volts, L1 > L3: 415volts, L2 > L3: 408volts
Result: 1% voltage output asymmetryy three phase
Output single phase voltage from converter under load to neutral: L1: 240volts, L2: 236volts, L3: 238volt
Result: 1% voltage output asymmetry single phase
Input voltage: 481volts @ 28 amps , output converter voltage ( averaged across phases): 412volts @ 20amps, input power consumption
W =VxAxPF, 481x28x.99= 13333.32 watts input power consumption part loaded.
W=VxAxPFx1.732, 412x20x.99×1.732= 14128.96 watts output power consumption part loaded.
Efficiency = input/output = 94%
Castle Rock Estate Porongurup, W.A.
We re-visited Rob Diletti at Castle Rock estate recently , for approx 15 years the R75/480 has been in use operating a range of three phase wine making equipment and refrigeration plant.