Guard-AC? PLUS
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Use this product on the input side of variable speed controllers to offer protection from power line spikes, voltage transients and even to help reduce the effects of lightning. Guard-AC™ PLUS is factory assembled and prewired. Simply connect three incoming and three outgoing conductors, and make connection to ground. The reactor portion of this network absorbs current surges, while the MOV portion clamps voltage spikes to acceptable levels. They combine to offer the optimum in electronic controller circuit protection. The reactor even helps to extend MOV life by reducing the energy content of spikes prior to reaching the MOV module. Three phase MOV modules contain high energy rated MOV’s offering protection from the most common transient voltage spikes. Module life is extended due to additional protection offered by reactor. Three Phase Reactor with Surge Arrestor 600 Volts AC max., 50/60 Hz Guard-AC™ PLUS reactors with surge arrestors offer enhanced protection of diodes, transistors, SCR’s, thyristors, etc. from dangerous voltage spikes and current surges. They can reduce overall system operating costs by reducing equipment down time and increasing system reliability and efficiency. Typical Applications Include: • Adjustable Speed Drives • SCR Controllers • Rectifier Circuits • Elevator Drive Systems • Machine Tool Controls Guard-AC™ PLUS offers the combined benefits of both reactors and MOV’s including surge absorption, spike reduction and harmonic attenuation. • Industrial Controls • Packaging Equipment • Printing Presses Connection Diagram: A For Application Engineering Assistance, Call: The International Power Quality Resource 3-Phase Reactor with Surge Arrestor Guard-AC™ PLUS combines the benefits of reactor and MOV (metal-oxide varistor) technology to provide enhanced surge/spike protection for variable speed drive/inverter applications.

* 4 % is the standard impedance for European installations. • For NEMA 1 enclosed units, change second-to-last digit from “0” to “1” (ie:RLA–01802 to RLA–01812). • For other ratings, consult the factory. W147 N9525 Held Drive Menomonee Falls, WI 53051 USA Telephone: 262-253-8200 Fax: 262-253-8222 e-mail:sales@mtecorp.com Form #1145E May 2003