200V to 230V Buck-Boost Transformer — Step-up, 3-Phase Delta
See how a 200V to 230V 3-phase delta buck-boost transformer corrects voltage and how to select the proper model.
Choosing a 200V to 230V transformer
At 200 volts, a 230 volt motor is running 13 percent below nameplate, outside the plus or minus 10 percent NEMA MG-1 permits. A 200V to 230V buck-boost transformer applies a 15 percent boost and puts that motor back inside its design window. The pair comes up constantly on HVAC, pumping and compressed air equipment, because 230V is the standard nameplate for motors intended for a 240 volt system, and plenty of those motors end up on services that measure 200. Single-phase and three-phase, 10 through 60 amps.
Almost every load on this correction is a motor. The 230 volt nameplate is what motor manufacturers stamp on machines built for a 240 volt system, and the equipment carrying it is the equipment that keeps a building running.Condensing units, heat pumps and rooftop package units with 230V compressorsReciprocating and rotary screw air compressors in shops and plantsSubmersible well pumps, booster pumps and irrigation pumpsHydraulic power units on presses, balers and dock liftsRefrigeration racks, walk-in condensers and ice machinesGearmotors on conveyors, augers and mixersThe supply side is usually one of three things: an older 200 volt industrial distribution system, a 208 volt service that sags to 200 under load, or a rural and end-of-line service that never reaches nominal. Contractors also meet this pair on replacement work, when equipment specified for a 240 volt residential-style supply is installed in a light commercial building fed at 208.