One of the more popular three-phase electrical services supplied to medium-size commercial buildings is the Wye or Star configuration transformer. The name comes from the transformer’s secondary ...

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 ...

In the original version of this article, the second figure contained an error. The image has been updated. It’s important for engineers to have a good, working ...

American manufacturers are importing European and Asian industrial equipment at an accelerating pace. The problem: that ...

A synchronous and synchronous motors are the two main categories of ac motors. The induction motor is a common form of asynchronous motor and is basically an ac transformer with a rotating secondary.

Selection of replacement motors is usually straightforward if the ratings are equivalent. Sometimes, however, a different type of motor is necessary or desirable. For success in these cases, it is ...

Forget heavy batteries because this hydrogen-powered motor delivers 1,000 hp from a 94kg package ...