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    What is Rotary Switch?

    A rotary switch is a switch operated by rotation. These are often chosen when more than 2 positions are needed. A rotary switch consists of a spindle or "rotor" that has a contact arm or "spoke" which projects from its surface like a cam. It has an array of terminals, arranged in a circle around the rotor, each of which serves as a contact for the "spoke" through which any one of a number of different electrical circuits can be connected to the rotor. The switch is layered to allow the use of multiple poles; each layer is equivalent to one pole. Alternatively the rotation can be limited to a fraction (half; third etc.) of a circle and then each layer can have multiple (two; three etc.) poles.

    Rotary switch

    Features of rotary switch

    • Red copper components to improve the performance.
    • 3C certification, quality assurance.
    • Quality bearing, flexible conversion.
    • Flame-retardant shell, safsty protection.
    • Pure siver contacts, stable current.

    How does a rotary switch work?

    As the spindle revolves within its shaft, the spoke moves into different positions, contacting the electrical terminal in each and activating the attached circuits or changing an electrical state (e.g. from on to off). These circuits travel through a circular component called a wafer. Multiple circuits may be attached to a single position.

    How to test a rotary switch with motor?

    1. Wire the rotary swith with the motor as shown below.
    2. Turn on the switch, the motor start ruuning.
    3. Turn off the switch, the motor stop running.

    Wiring of rotary switch and motor

    ATO offers 3-pole/ 4-pole rotary switches with different current specifications, such as 20A, 40A, 63A, 100A, 125A, 160A. See more information by clicking the video.

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