| 摘要 |
PURPOSE:To simplify a shield composition and stabilize insulation characteristics by winding an insulated conductor to form a non-inductive winding on an insulation cylinder which is to be a winding core of a tap winding as a shield. CONSTITUTION:A low-voltage winding, high-voltage winding and a tap winding are wound around a core and the whole assembly is housed in a tank and an on- load tap-changing transformer is composed. In the transformer thus compsed, an insulted shielding conductor 5 is wound on an insulation cylinder 11, which is to be a winding core of the tap winding 4, to form a non-inductive winding. Both ends of this insulated conductor 5 are connected to an end static shielding 10 of the tap winding, whose potential is made grounded or neutral. With this constitution, static charge is prevented from being transferred from the high- voltage winding to the tap winding so that a tap changer is protected from application of excess voltage. |
