What Makes Contactors Different from Relays?

Contactors and relays are frequently confused, to the point that the terminology is sometimes used interchangeably, and the reason is that they contain similar hardware and essentially perform the same function. Contactors and relays are both electromagnetic switches that open and close circuits in electrical equipment that is turned on and off frequently. Both contain components like electromagnets, moveable armatures, springs, and switch point contacts, and both typically use a low power signal to interrupt much larger current loads. Both can be used to control several several circuits with one signal. However, contactors and relays perform similar functions in different ...
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5 common causes for electrical motor failures

Most of us realize that electric motors are critical components of daily life. We depend on electric motors to run many different types of systems, applications, and services. While today’s motors are highly efficient and come with a long service life and require minimum maintenance, they still must be monitored regularly to ensure reliable operation. A giant corporation, for example, relies on a great many electric motors to remain productive and one seemingly insignificant problem could result in disaster for the company; financial or physical or both. Most companies of size have a maintenance program in place to identify causes ...
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