paperboard angle ring for transformer

Technical field:

The paperboard angle ring is an insulating part at the head of a transformer winding, which is a transformer corner ring. It is particularly suitable for a double-layer cylindrical voltage regulating winding of a three-winding oil-immersed power transformer with a voltage class of 110kV.

Background technique:

The insulation part of the existing transformer is located at the root of the high-voltage regulating winding head, but this increases the thickness of the high-voltage regulating winding head and makes it seriously exceed the standard. Moreover, due to the existing structural limitations of the voltage regulating winding, there are the following defects. A: The direction of the electric field is parallel to the direction of the insulating cardboard. B: Large oil gap structure. C: There is no barrier in the oil gap of the winding, which requires that there must be no dust on the surface of the insulation. As a result, creepage or electric field distortion on the surface of the insulating parts is prone to occur, which causes discharge accidents on the surface of the transformer insulating parts.