The on-load change-over switch, an on-load tap changer and method for switching an on-load tap changer

摘要

An on-load change-over switch for a an on-load tap changer for switching over from a connected to a preselected winding tap winding tap a tap transformer comprises at least one resistanceless current path and at least one resistive path comprises. A measuring device measures an actual value of a phase angle between a load current and a voltage of the step transformer from the preselected winding tap for removing current.By an adjusting device, the temporal order of the wiring of the paths of the on-load change-over switch as a function of the measured actual value and a predetermined limit value of the phase angle is variably adjustable in such a way that, during a on-load change-over switching the voltage is always within a voltage range between the connected winding tap and the preselected winding tap is. It is also a an on-load tap changer with such an on-load change-over switch as well as a method for switching an on-load change-over switch of a wired to a preselected winding tap winding tap discloses a tap transformer.