| 摘要 |
In order to allow reliable and safe vertical tracking with a simple design at the same time for a photovoltaic installation having a multiplicity of photovoltaic modules which are arranged on supporting frameworks. Each of the frameworks has a driver element which, in particular, is cylindrical and has a common drive device that loop or wraps around it in the installed state. In order to prevent slippage between the drive device and the driver element, there is provided a friction braking device which, in a particular embodiment, is formed by a guide slot in the driver element.
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