LOW-VOLTAGE COIL FOR INSTRUMENT TRANSFORMER, INSTRUMENT TRANSFORMER AND WINDING METHOD OF LOW-VOLTAGE COIL FOR INSTRUMENT TRANSFORMER

摘要

PROBLEM TO BE SOLVED: To provide a low-voltage coil for an instrument transformer for which it is not necessary to pull around a lead by enabling a winding start lead and a winding end lead to be drawn in the same direction according to a simple winding method without adding any special structure in the case of winding for odd layers, the instrument transformer with the low-voltage coil and a winding method of the low-voltage coil for the instrument transformer.;SOLUTION: In a low-voltage coil 4 of winding for odd layers, a winding start lead 6a which is one end portion of a wire 10 is disposed in one end of a cylindrical winding core, the wire 10 is laid from one end side to another end side of the winding core along an axial direction of the winding core on an outer surface of the winding core for a predetermined length, the wire 10 is then wound around the winding core multiple times from the other end side to the one end side so as to roll in a portion laid on the outer surface, thereby forming a bottom layer, and a winding end lead 6b which is the other end portion of the wire 10 is drawn closer to the winding start lead 6a.;COPYRIGHT: (C)2014,JPO&INPIT