The present disclosure discloses a composite crossarm and a power transmission tower. The composite crossarm includes a post insulator and three suspension insulators. The post insulator and the suspension insulators each has an end configured to be connected to a tower body of the power transmission tower, and another end connected together to form an end of the composite crossarm that is configured to attach a transmission line. The three suspension insulators are arranged at intervals around the post insulator. Axes of two suspension insulators and an axis of the post insulator are in the same plane. The two suspension insulators whose axes are in the same plane as the axis of the post insulator are defined as first suspension insulators, the remaining suspension insulator is defined as a second suspension insulator. The two first suspension insulators form an angle ranged from 45? to 90?.

The present disclosure discloses a composite crossarm and a power transmission tower. The composite crossarm includes a post insulator and three suspension insulators. The post insulator and the suspension insulators each has an end configured to be connected to a tower body of the power transmission tower, and another end connected together to form an end of the composite crossarm that is configured to attach a transmission line. The three suspension insulators are arranged at intervals around the post insulator. Axes of two suspension insulators and an axis of the post insulator are in the same plane. The two suspension insulators whose axes are in the same plane as the axis of the post insulator are defined as first suspension insulators, the remaining suspension insulator is defined as a second suspension insulator. The two first suspension insulators form an angle ranged from 45? to 90?.

An insulation system includes a number of mica hard-boards joinable to form a free-standing slot-liner for insulating a conductor when placed therein and accommodating an expansion of the conductor. In another embodiment, an electromagnetic pump includes a stator of the electromagnetic pump including a number of laminations, a slot-liner positioned within a gap formed by the laminations, an annular wound copper conductor coil positioned within the slot-liner. The slot-liner includes a number of mica hard-boards joined to form an annular volume for insulating the conductor coil and accommodating an expansion of the conductor coil.

An insulation system includes a number of mica hard-boards joinable to form a free-standing slot-liner for insulating a conductor when placed therein and accommodating an expansion of the conductor. In another embodiment, an electromagnetic pump includes a stator of the electromagnetic pump including a number of laminations, a slot-liner positioned within a gap formed by the laminations, an annular wound copper conductor coil positioned within the slot-liner. The slot-liner includes a number of mica hard-boards joined to form an annular volume for insulating the conductor coil and accommodating an expansion of the conductor coil.

An apparatus for affixing an insulator to a structure in a power distribution system is disclosed herein. The apparatus may comprise a gain base that enables attachment of an insulator to a utility pole or other structure at multiple angles. In various embodiments, the apparatus may include at least a fixed component configured to be affixed to a structure and a pivoting component configured to rotate with respect to the fixed component to adjust the orientation of the hole via which an insulator is attached to the apparatus. The pivoting component may be configured to receive a threaded insulator pin or other connection device configured to clamp or otherwise affix an insulator to the apparatus.

A support system for supporting power distribution or transmission lines includes a support pole having a first end and a second and a crossarm attached to the support pole, proximate the first end of the support pole. The crossarm has a first end, a second end and one or more side walls extending between the first and second ends of the crossarm. The side walls of the crossarm define an elongated interior space. The support system further includes an internal conduit formed in the interior space of the crossarm. The internal conduit extends along an axial direction of the crossarm. The internal conduit is made from insulative material.

An insulating support includes a pillar-shaped portion made of resin, a metal insert buried in one end surface of the pillar-shaped portion in an axial direction, a metal insert buried in the other end surface of the pillar-shaped portion in the axial direction, and one protrusion made of the resin and provided in a ring shape and integrally with the pillar-shaped portion on an outer circumferential surface of the pillar-shaped portion on a side of the metal insert. The metal insert includes a first cylindrical base portion and a first distal end portion. The metal insert includes a second cylindrical base portion and a second distal end portion. A whole of the first distal end portion is disposed within an extended range of the protrusion in the axial direction.

An insulating support includes a pillar-shaped portion made of resin, a metal insert buried in one end surface of the pillar-shaped portion in an axial direction, a metal insert buried in the other end surface of the pillar-shaped portion in the axial direction, and one protrusion made of the resin and provided in a ring shape and integrally with the pillar-shaped portion on an outer circumferential surface of the pillar-shaped portion on a side of the metal insert. The metal insert includes a first cylindrical base portion and a first distal end portion. The metal insert includes a second cylindrical base portion and a second distal end portion. A whole of the first distal end portion is disposed within an extended range of the protrusion in the axial direction.

The present disclosure provides a fitting for a power transmission system. The fitting may include a first end configured to couple to an end of an insulator, a second end configured to couple to a power line, a collar located between the first end and the second end, and a neck located between the collar and the first end. An outer diameter of the collar may be greater than an outer diameter of the neck. A power transmission system with a fitting and corona ring assembly is also provided.

The present disclosure provides a fitting for a power transmission system. The fitting may include a first end configured to couple to an end of an insulator, a second end configured to couple to a power line, a collar located between the first end and the second end, and a neck located between the collar and the first end. An outer diameter of the collar may be greater than an outer diameter of the neck. A power transmission system with a fitting and corona ring assembly is also provided.