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We have more offices than any of our competitors, giving you the best service possible


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Nationwide - Headquarters

Protec Equipment Resources, Inc.

1517 West Carrier Pkwy

Suite 116

Grand Prairie, TX 75050

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Featured Products and Services


Merlin Gerin Secondary Injection Test Set

Many circuit breakers are tested by use of secondary injection test equipment applied to the breaker’s trip unit. These specialty test sets check the trip function of the circuit breaker — in other words, whether the electronics in the breaker are functioning properly. When you have work requirements that involve testing and maintaining Merlin Gerin circuit breakers, the Merlin Gerin Secondary Injection Test Set is ideal for verifying the proper operation of the trip circuitry. Merlin Gerin is only one of several well-known brands in the Protec stable of test equipment rental.

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Secondary Injection Test Sets from Square D by Schneider

Regular testing and maintenance of circuit breakers and relays is essential when dealing with sophisticated electrical systems.

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Try Cutler Hammer for Secondary Injection Test Kit

For checking circuit breaker and protective relay systems, the secondary injection test set is an essential piece of electrical test equipment for companies to use. It differs from the standard primary injection testing method in that it does not require high current to be passed through the primary current path, but rather tests the breaker as a result of low level signals sent directly to the solid state trip device that controls the operation of the breaker.

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