| 摘要 |
<p>The invention relates to a pre-selector actuating device for a pre-selector in a tap changer of a transformer. The device includes a drive input means (11) arranged to make an input movement stroke of a predetermined length. Further it includes a pre-selector arm (51) arranged to make a pre-selector stroke from a first contact to a second contact. There is a movement transmission mechanism connected to the drive input means (11) and to the pre-selector arm (51). According to the invention, the movement transmission mechanism is arranged to convert the input movement stroke such that the pre-selector stroke obtains a movement pattern having an initial period of relatively slow movement, an intermediate period of relatively fast movement and an end period of relatively slow movement. The invention also relates to a tap changer having such a device and to a transformer provided with such a tap changer.</p> |
