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contactor

contactor

contactor

(OP)
which contactor is best for a motor opration which is a continuos process and why.

RE: contactor

For a motor that has a minimum of on/off cycles, a mechanical contactor from allen-bradley.com, squared.com, etc is a frequent choice.  A mechanical: adapts well to most temperature environments, generates arcing, has a life based upon cycles.

For a motor that has many on/off cycles, or a motor that is nearby other electronics such as PLCs, PCs, etc; then a solid state contactor is a good choice.  These are made by power-io.com, sprecherandschuh.com, etc.  A solid state: be aware of temperature rise, has virtually no limit on cycles, switches cleanly at the zero crossing mark (= low electronic noise), can handle momentary inrushes fairly well.

For a motor that you need to vary the speed, then something like a ssddrives.com, abb.com, etc is common. A vsd: be aware of temperature rise, virtually no limit on cycles, has electrical noise concerns, infinite speed adjustability, somewhat costly.

  

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