A thorough understanding of Delta and Wye service transformers, their primary and secondary windings, and their windings’ voltages, will help HVACR service technicians in their understanding of ...

It’s impossible to balance line-to-line voltages perfectly in three-phase circuits, so they typically differ by a few volts or more. However, if voltage unbalance exceeds 1%, it can markedly decrease ...

Some industrial applicationsrequire you to feed a low-powerdc/dc converter from a three-phasesource and possibly to deal with line-tolinevoltages of 200 or 400V rms.Further, the neutral terminal of ...

In this article, Jake Green, Head of Technical Engagement, Scolmore Group, considers where three-phase supplies come from and some of the general terms used. In subsequent articles Jake will consider ...

You can't avoid power line disturbances altogether, but you do have access to options for mitigating voltage, current, and frequency deviations produced by the electric utility system. You can ...

A farmer is watering an alfalfa field 24 hours a day using a 3-phase 100-hp electric motor and adjustable speed drive (ASD). The farmer checks on his field to find the water not flowing and the pump ...