许多小型水电站都采用ZD或DW_(10)型空气开关作为发电机主开关,在进行同期操作时,由于手动合闸不十分迅速,加上空气开关三相动、静触头间隙行程误差,不可能做到三相动作完全一致,因此不能准确地捕捉同期时间。为了克服此缺点,防止非同期合闸,现将手动操作改为用交流接触器操作,其接线如图示。 Many small hydropower stations use ZD or DW_ (10) type air switch as the main switch of the generator. During the same period of operation, the manual switch-on is not very fast. It is possible to achieve exactly the same three-phase action, so can not accurately capture the contemporaneous time. In order to overcome this shortcoming and prevent the non-simultaneous closing, the manual operation is changed to be operated by the AC contactor. The wiring is as shown in the figure.