Two methods are typically used to measure or test ground resistance—Fall of Potential and Clamp-On. The Fall of Potential test involves imposing a current flow between a remote current probe (Z…

In an induction motor, the stator carries a three-phase winding and the rotor is a simple design, commonly called a "squirrel cage". Alternating  current flow through the stator field induces…

The use of variable frequency drives (VFDs) in commercial and industrial facilities is growing, and for good reason. VFDs can reduce motor electricity usage by 25 to 85 percent, depending on the…

Infrared heaters use metal or ceramic tubes that radiate energy in the infrared wavelength region; they are used most efficiently to direct heat toward high traffic areas in a large volume space…

LED stands for light-emitting diode. They are becoming very popular because of their many advantages, including high energy efficiency, long operating, durability and excellent color quality.…

A variety of systems—offline, online and line-interactive—are available, based on the degree of protection and power conditioning you need.Offline. This is the simplest type of UPS and…