DIGITAL PHASE CONVERTERS • THREE-PHASE MOTORS • ROTARY PHASE CONVERTERS • STATIC PHASE CONVERTERS • BUCK/BOOST TRANSFORMERS

 


 

Phase Converters & Power Factor
Phase Converter Efficiency
Installing a Phase Converter
Rotary Phase Converters
Static Phase Converters
VFDs as Phase Converters
     • Harmonic Distortion
Three-Phase Motors
Phase Converters & Voltage Balance
Phase Converter Applications
     • Submersible Pumps
     • Woodworking Equipment
     • Dual Lift Stations
     • Phase Converters & Welders
     • Phase Converters & CNC Machines
     • Phase Converters & Air Compressors
     • Phase Converters & Elevators
     • Phase Converters & Wire EDM
     • Phase Converters & HVAC
Phase Converters & Transformers
     • Step-up Transformers
     • Buck-Boost Transformers
     • Isolation Transformers
Phase Converter Experts
Digital Phase Converters
Regenerative Power
Three-Phase Power
     • Delta vs. Wye Configured Power
Motor Starting Currents

Phase Converters and Step-up Transformers

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Step-up transformers (and when wired in reverse, step-down transformers) are used to make large changes in voltage.

Common configurations are 240V to 480V, 208V to 480V to name only a few. They are usually available in both single-phase and three-phase models.

Sizing Transformers

Transformers need to be sized to the load they will supply and usually rated in KVA, which is an acronym for “thousand volt

amps”.  For single-phase loads, multiply the operating voltage of the load by the amps then divide by 1,000 to get the KVA. e.g.  240V x 30A / 1,000 = 7.2 KVA.

For three-phase loads, multiply the operating voltage of the load by the amps, multiply by 1.73 (square root of three) then divide by 1,000 to get the KVA. e.g. 240V x 30A x 1.73 / 1,000 = 12.46 KVA.

Transformers and Phase Converters

Step-up transformers are commonly used in conjunction with phase converters. A common application is the operation of 480V equipment. The 240V single-phase voltage must be stepped up to 480V, either through a single-phase transformer before the converter, or a three-phase transformer after the converter.

Be sure to consult a knowledgeable supplier of transformers when choosing one for your application.

       
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