ON-LOAD TAP CHANGER, METHOD FOR INSTALLING A LOAD TRANSFER SWITCH INSERT IN THE ON-LOAD TAP CHANGER, AND KEROSENE DRAIN SCREW

摘要

The invention relates to an on-load tap changer (1), comprising a load transfer switch insert (14) and an oil suction pipe (60), and to a method for installing a load transfer switch insert (14) by means of the switching tube (15) and the oil suction pipe (60). The oil suction pipe (60) is arranged centrally, and coaxially along an axis (A) of the on-load tap changer (1), within the switching tube (15). The on-load tap changer (1) has a kerosene drain screw (70), which is attached in a bottom (21) of the on-load tap changer (1) in such a way that the kerosene drain screw is arranged coaxial to the axis (C) of the oil suction pipe (60), to the axis (B) of the switching tube (15), and to the axis (A) of the on-load tap changer (1). A bearing ring (53) is acted upon on one side and radially to the axis (A) of the on-load tap changer (1) by an elastic element (54) in such a way that the switching tube (15) and the oil suction pipe, which both interact (60) with the bearing ring (53) in a form-closed manner, are centered about the axis (A) of the on-load tap changer.

主权项

1. An on-load tap changer comprising:
a switching tube; an oil suction pipe arranged centrally and coaxially along an axis inside the switching tube; a kerosene drain screw so mounted in a base of the on-load tap changer that it is coaxial with an axis of the oil suction pipe, the axis of the switching tube (15) and an axis of the on-load tap changer; and a bearing ring so acted on by a resilient element at one side and radially with respect to the axis of the on-load tap changer that the switching tube and the oil suction pipe both mechanically positively cooperate with the bearing ring and are centered about the axis of the on-load tap changer.