The 120Vac and 240Vac Coil-Lock products shown in the above photo represent a major breakthrough in assembling electronic components for cost-effective voltage sag protection. The Coil-Lock electronics works with ac relays, contactors and solenoids as a hold-in-device that keeps motors and other critical process elements on line during those annoying momentary voltage sags. Literally any device that is controlled by energizing an ac coil, when powered through a Coil-Lock unit will continue to operate as intended through these power disturbances. Not only does the Coil-Lock protect the coil circuits from voltage sags, but also has the ability to protect coils from lightning and switching induced transients just like a surge suppressor.

The Coil-Lock's compact packaging combined with its Din Rail octal relay socket-mounting base make the Coil-Lock unit easy to fit into almost any commercial and industrial application. Electric service supply voltage sags and dips are a fact of life. Caused by weather, falling tree limbs, and animal intrusion events, electric utility system faults are unavoidable and can be expected dozens of times a year at the typical facility site. The good news is that critical process equipment can stay up and running when you need it by applying PQSI Coil-Locks on relays, contactors, and motor starters that often are diagnosed as weak links in automated production lines because these coil operated devices usually have a low tolerance to electric service voltage sags.

The following figure depicts the enhanced voltage sag protection provided by the Coil-Lock product. The figure shows the typical unprotected relay or contactor's capability to ride through voltage sags down by 15% from its nominally rated voltage (yellow area in the figure). The same relay or contactor, when protected by the Coil-Lock, will continue to keep operating with voltages sags down by 75% from its nominally rated voltage (green area in the figure). For voltage sags down by greater than 75%, the Coil-Lock de-energizers the relay or contactor coil to maintain the safety function for emergency stop circuits (red area in the figure).

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FOR TECHNICAL INFORMATION AND PRICING, CONTACT:

Power Quality Solutions Inc.
12529 Coral Reef Circle
Knoxville, TN 37922-5490

Phone: 865-671-8364
Global Fax: 800-881-2893 • Alternate Fax: 702-973-7970