INSULATING UNIT FOR FIELD WINDING OF ELECTRICAL ROTARY MACHINE

PURPOSE:To prevent breakdown a layer of insulating member and to prevent layer shortcircuit, by employing a layer insulating member having cushion performance and low compression resiliency. CONSTITUTION:A layer insulating member 44 is arranged between the end-of- winding 42 of a winding conductor brazed to a lead wire 13 and the winding conductor 43 in second layer. A cover insulating member 41 prepared by forming a heat-resistant electrical insulating polyamide paper having cushion performance and low compression resiliency into U-shape and contacting with the lamination side of the winding conductor connected with the lead wire 13 and the opposite side faces is employed as the layer insulation member 44. By such arrangement, breakdown of the layer insulation due to local contact of winding conductors caused by buckling of the lead wire can be prevented, resulting in prevention of layer shortcircuit due to mutual shift of winding conductor layer.