| 摘要 |
The disclosure relates to checking a rotational speed relay of a wind turbine. The wind turbine comprises a rotational speed sensor for the rotational speed of a shaft. The rotational speed sensor outputs a rotational speed signal, which is fed to a signal input of the rotational speed relay. According to disclosure, the rotational speed signal fed to the rotational speed relay is first inactivated. Then a signal generator is activated, which produces a check signal equivalent to the rotational speed signal. The check signal is fed to the signal input of the rotational speed relay. The signal generator is operated with a check signal that is beyond a rotational speed limit, and a check is performed to determine if the rotational speed relay generates a switch-off command. This allows the functional capability of the rotational speed relay to be checked reliably and at low cost. |
