This file type includes high-resolution graphics and schematics when applicable. For applications such as motor control or power supplies, it’s often necessary to know whether the ac line is at 120 V ...

It is precisely the sort of thing advocated by Mr. L.T. Thomasson, PE, in the June issue of Power Engineering (p. 7) that injures us as a profession and industry. The electrical power industry is ...

The circuit in Figure 1 provides a low-cost, isolated ac-line monitor that measures ac-line-voltage level and has some other unique capabilities. The analysis of the circuit is straightforward: When ...

This article was originally published in March 2017 on the Residential Lighting website. Residential Lighting was the precursor to Furniture, Lighting & Decor. The magazine ran for 25 years and was a ...

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 ...

The use of a linear optocoupler and a capacitor-based power supply yields a simple, yet precise power-line-monitoring system. The circuit in Figure 1 converts the 110V-ac power-line voltage to an ac ...