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. All types 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:
- Control of motors and installations
- Switching on electrical heating systems
Main contactors in the portfolio of Automation24
Main contactors, solid-state contactors and solid-state reversing contactors from Siemens are in the product range of Automation24 with an operating power of up to 18.5 kW. All contactors are available in the two sizes S0 and S00 for different control voltages and current intensities. The auxiliary contacts are normally closed and/or normally open.
At Automation24 you find a large selection of main contactors at very favourable prices. Select the main contactor suitable for your application now!