Novel local reinforced insulation type transposed conducting wire

Abstract

The invention provides a novel local reinforced insulation type transposed conducting wire, which can not influence the heat radiation effect of the transposed conducting wire under the condition of meeting the local reinforced insulation requirements of the transposed conducting wire. The sudden short circuit resistance capability of a winding coil is ensured, so the safety of an electric transformer is ensured. The novel local reinforced insulation type transposed conducting wire comprises a transposed wire core, wherein a paper insulation layer is covered and wound outside the transposed wire core, and the paper insulation layer comprises an outer insulation layer and an inner insulation layer. The invention is characterized in that a middle insulation layer is covered and wound on thelocal insulation reinforced part of the upper part in the height direction of the transposed wire core and between the outer insulation layer and the inner insulation layer.

Description

technical field [0001] The invention relates to the technical field of transposition conductors, in particular to a novel partially reinforced insulation type transposition conductor. Background technique [0002] At present, most of the windings of large-capacity power transformers use transposed wires, which are key components in the transformer and must withstand the impact of impulse voltage. Poor, especially when the end of the coil and the inner diameter side of the winding are close to the strip, it is the part where surface discharge is prone to occur, that is, the weak point of insulation, so local insulation strengthening treatment is required. At present, the main method used is to increase the number of insulation wrapping layers of the transposed wire, or to carry out manual wrapping to strengthen the insulation during the coil manufacturing process, resulting in a relatively large overall insulation thickness of the transposed wire, which affects the heat dissi...

AI Technical Summary

Problems solved by technology

At present, the main method used is to increase the number of insulation wrapping layers of the transposed wire, or to carry out manual wrapping for insulation strengthening during the coil manufacturing process, resulting in a relatively large overall insulation thickness of the transposed wire, which affects the heat dissipation effect of the transposed wire , resulting in a decrease in the ability of the coil to resist sudden short-circuit

Images