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Sliding contact wire is widely used in mobile devices. It is mainly composed of two parts, sliding line guide rail and collector. The slide wire guide rail is mainly connected with the power supply. The common guide rail is generally 4m and 6m, which is a fixed part. The collector is mainly connected with the motor, mainly in contact with the copper bar on the slide wire guide rail. There are some dangers in the use of the sliding contact wire, but as long as it is operated normally, there is no need to worry about it.

The structure of the sliding contact line is various, but all the working principles are the same. The mobile device needs to change its position from time to time because of its movement. At each different position, the mobile device can obtain power at any time, otherwise it cannot continue to move.

At this time, the sliding contact line came into being with a number of conductors laid parallel along the running track of the mobile equipment. On the mobile equipment, there is a collector that can take electricity from the conductor.