Irrigation was previously supplied via 2 x 15 kw 3 phase pumps operated via 2 x electronic inverters for approx. three years during this time they have replaced four Western Power supply transformers due to Harmonics, along with other problems like contactor coils running hot & melting ,the switchboard running hot all typical indications of harmonics.

They needed to upgrade the irrigation to 3 x 22kw pumps operated via one of the existing VSDs to control pressure , we offered the R/75/480U rotary converter to supply 415 volt three phase from their 480 volt single phase supply 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 though out the load spectrum.
• Floating pole rotaries ( FPRs ) coupled with modified rotors ensure:

• NO  high speed electronic switching devices used or uncontrolled diode bridge rectifier used in the output power supply.

POLYPHAZ  R/75/480U  Rotary converter

Power supplied via 2 x 50 KVA TXs

                                                    Reading taken Dated 21/01/2003

        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    34amps                               L1    37amps                           L1    34amps
L2    32amps                               L2    32amps                           L2    34amps
L3    34amps                               L3    36amps                           L3    34amps
 
 
 
 

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