Abstract: A method of securing a flexible temperature sensing element to a duct spacer element of the type which is commonly used in an electrical transformer includes steps of forming a groove in a surface of duct spacer element; and securing a flexible temperature sensing element within the groove so that the flexible temperature sensing element does not protrude from the groove beyond the surface in which the groove is formed. In this way, the duct spacer element and sensing element may be assembled into an electrical apparatus such as a transformer without imparting destructive mechanical forces to the sensing element.

Abstract: A method of securing a flexible temperature sensing element to a duct spacer element of the type which is commonly used in an electrical transformer includes steps of forming a groove in a surface of duct spacer element; and securing a flexible temperature sensing element within the groove so that the flexible temperature sensing element does not protrude from the groove beyond the surface in which the groove is formed. In this way, the duct spacer element and sensing element may be assembled into an electrical apparatus such as a transformer without imparting destructive mechanical forces to the sensing element. The disclosure also embraces an integrated temperature sensing duct spacer unit.

Abstract: An electrical inductive apparatus having a magnetic core with a rectangular core leg portion surrounded by a winding tube assembly around which is disposed a plurality of turns of an electrical conductor. The winding tube assembly consists of four members which interlock to form a rectangular opening around the core leg. Two of the members of the winding tube assembly, which are disposed adjacent the shorter dimension of the core leg, have a plano-convex cross-sectional configuration that resists movement of the electrical conductor along this axis of the core. A method of constructing an electrical winding for an electrical inductive apparatus having a rectangular core leg is disclosed.