A Primer on Relay Testing

December 6, 2016


Engineers, inventors, repairmen, electricians and other blue collar professionals use relay testing on a regular basis to ensure their systems, equipment and machines are operating properly. Since we understand relay testing can be a bit tricky at times, we have compiled a quick overview that informs you of the basics.

Relay Schematics
The pin configuration of most relays tends to be fairly simple and is usually printed on the side of the module itself. However, if you need more information regarding a particular relay and its number of pins, it's best to look up data sheets provided by the manufacturer. A quick online search should provide you with what you're looking for.


Why Relay Test?
Relay testing is performed to get an idea of whether or not the good or device is defective. If totally defective after test and measurement, it will need to be replaced. If not, it may just need a few new parts.


Electromechanical vs Digital Relay
A solid-state relay (SSR) is not necessarily a relay, but a type of electronic current. SSRs are sensitive to heat and rarely fail under standard service conditions. On the other hand, an electromechanical relay (EMR) has a finite life expectancy.


Industrial-Grade Equipment
There are a few tools you can use to make solid-state power and electric relay testing easier, including an ohmmeter. This small instrument measures electrical resistance and displays it in ohms, so you can quickly assess the situation.


Discover why Electro Rent is the authority on power and industrial equipment. Contact us today!

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