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Main contactors are mechanical contactors with a high switching capacity that are used for controlling motors. Solid state contactors, however, work with faster switching times and avoid possible wear because they operate electronically and not mechanically. Solid-state reversing contactors are suited to reverse the direction of three-phase current motors. A variety of main contactors are available with AC and DC control voltage. The three-phase contactors are equipped with auxiliary contacts to return the signals to the controller.
Applications of main contactors in industry
Main contactors are typically used in automation and control technology. Examples are:
At Automation24 we offer quality contactors and main contactors from Siemensand LS ELECTRIC with an operating power of up to 30 HP. Automation24 offers NEMA style contactors in different sizes for different control voltages and current intensities. The auxiliary contacts are normally closed and/or normally open. If you need a contactor for an application with 24 V DC control voltage, take a look at Siemens SIRIUS 3RT20151BB41 with a 3 HP power rating. If you are looking for something with 120 V AC control voltage, take a look at LS ELECTRIC MC18B-30-11-K7-S-E - 1346000500 with a 10 HP power rating.
At Automation24 you can find a large selection of main contactors at excellent prices. Select the perfect main contactor for your application now!