Electric Motors, Drives, and Controls

Hold-in keeps relays and contactors energized "Micro" coil-lock is an electrical coil hold-in device for relays and contactors.
By staff November 1, 2000

Hold-in keeps relays and contactors energized

“Micro” coil-lock is an electrical coil hold-in device for relays and contactors. It keeps motors and other critical industrial process elements in service during momentary voltage sags or dips. Mechanical design and electronic packaging accommodates advanced circuit board assembly techniques, allowing custom configurations for hard-to-fit equipment locations. Power Quality Solutions, Inc.; www.pqsi.com

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Soft starter uses less power

Intelligent Technologies soft starter uses a 24-V dc control power and is 30-80% smaller than other industry offerings. It uses microprocessors and separates the control and logic circuits to reduce the control power requirements of these devices. Its design integrates both the bypass contactor and overload relay functions into one unit. Eaton Corp.; www.cutlerhammer.eaton.com

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Grease extends bearing life

Polyrex EM polyurea grease extends lubrication life for electric motor bearings, protects against bearing failure, provides durability when subjected to shearing forces, and resists rust, washout, and corrosion. The grease can protect bearings for extended periods at elevated temperatures. Baldor Electric Co.; www.baldor.com

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Soft starter regulates torque

Simplified motor soft-start is a low horsepower, three-phase product that contains up to 70% fewer electrical components than the typical unit. It regulates starting torque without limiting starting current or running speed by applying reduced voltage to only one phase initially. It is available from 13 hp, 208-V ac to 30 hp, 408-V ac. Enerpro, Inc.; www.enerpro-inc.com

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Family of motors rated for VFDs

Blue Chip severe-duty, explosion-proof motors are rated for variable and constant torque variable frequency drive (VFD) applications. Motor features include epoxy paint, corrosion resistant hardware, and oversized rotatable conduit box. The insulation system uses corona resistant magnet wire to resist voltage spikes. Low loss laminations minimize temperature rise and increase motor life. Marathon Electric Mfg. Corp.; www.marathonelectric.com

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