Have you ever wondered why some low-voltage (115-V) power-consuming devices burn out too often? It could be because they are wired to a “high” or “wild” power leg of a voltage supply. These devices ...

While working at a sewage treatment facility, I ran across an interesting situation with a 30kVA transformer. I had bid on a replacement generator job and was given a set of drawings to work from, ...

Wye or “star” service transformers are one and the same. The names come from the secondary winding configuration, which looks like a “Y” or three-sided star (Figure 1). For the remainder of this ...

In a thermally enhanced, 16-lead TSSOP-16E, the LT3439 1A, isolated push-pull dc/dc transformer handles inputs from 2.8V to 17.5V to drive an external center tapped transformer. Actual output voltage ...

Here is a simple 12 volts DC to AC inverter circuit. This 120V AC power source is built with a simple 120V:24V or 110V:24V center-tapped control transformer and four additional component. This circuit ...

Similar to feeder taps, covered in the last issue, transformer secondary conductors can be every bit as confusing. Let's take a closer look at 240.21(C) to help clear up any misconceptions. As with ...