"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Window AC units might all look the same, but performance can vary widely from one model to the next, as ...

Testing products designed to operate from ac power is not as simple as one might think. Consider a factory with the straight-forward need to manufacture and test the heating element for a toaster.

High Voltage, Inc.'s VT-33 offers complete cable care for underground shielded power cables up to 25 kV class. It a VLF AC cable testing and fault finding/burner instrument in one self-contained ...

The High Voltage, Inc. VLF series of AC Hipots enables utilities to economically AC field-test cables and electrical apparatus instead of DC testing. A VLF unit is an AC hipot with a 0.1 Hz or lower ...

Through 25 years of window air conditioner testing, most of the units I've reviewed have stuck to the same basic, industrial-looking design. Windmill, a relative newcomer to the market, and a brand ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." A portable air conditioner is just what it sounds like — a mobile device that delivers cool air where and ...

Solid-state ac supplies replace motor-generator and tap-changing transformers to offer the same tests at the push of a button • Solid-state ac-power sources combine the variable-frequency and ...