Arrow-Hart CRA 121 U Magnetic Contactor (Relay) This is a specialized industrial relay. A magnetic starter is an electromagnetically operated switch which provides a safe method for starting an electric motor with a large load. Magnetic starters also provide under-voltage and overload protection and an automatic cutoff in the event of a power failure.
You are considering a Symcom "Motor Saver", three phase electric motor protector. This item is believed to be used, but could possibly be unused, out of it's original packaging. Being sold "as is, untested".
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