A wire harness includes a multi-core cable including a group of cables composed of a plurality of cables, and a sheath provided around the group of cables, and a resin mold covering the group of cables at a cable branching portion where the group of cables exposed from an end of the sheath of the multi-core cable are branched. An outermost layer of each cable constituting the group of cables includes polyolefin or thermoplastic polyurethane. When the sheath includes polyolefins, the group of cables includes at least one cable including an outermost layer including thermoplastic polyurethane. When the sheath includes thermoplastic polyurethane, the group of cables includes at least one cable having an outermost layer comprising polyolefin. The resin mold includes a resin composition of a polymer alloy of a first polymer including at least one of polyamide polymer, polyester polymer, and thermoplastic polyurethane and a second polymer including polyolefin.

In the insulation sheet, an insulation resin layer made of a thermosetting resin composition in an uncured or semi-cured state is formed on one or each of both surfaces of the base material. The thermosetting resin composition contains: a thermosetting resin (A) that is in solid form at 25° C.; a thermosetting resin (B) that is in liquid form at 25° C.; a latent curing agent that is unreactive at 60° C. or lower; and an inorganic filler having a maximum particle diameter smaller than a film thickness of the insulation resin layer and having an average particle diameter smaller than 0.5 times the film thickness. The insulation resin layer of the insulation sheet is efficiently compressed into a predetermined thickness by pressure application at normal temperature and permeates a gap between a stator core and a stator coil by heating during curing treatment, whereby both members can be insulated and fixed.

A flange fitted around a round cylindrical condenser core of a bushing is described. The flange comprises an annular lower flange part arranged to fit around a radial shoulder of the condenser core such that a lower shoulder chamfer of the shoulder rests against lower flange chamfer of the lower flange part around the circumference of the condenser core; and an annular upper flange part fastened to the lower flange part and fits around the condenser core above an upper shoulder chamfer of the shoulder. An upper flange chamfer of the upper flange part is between an upper sealing element and a lower sealing element, forming an annular chamfer space is formed between the upper flange chamfer and the upper shoulder chamfer between the upper and lower sealing elements. The flange comprises an injection through hole for a filler material to be injected there through to fill the chamfer space.

This invention relates to a method for manufacturing a room temperature shrinkable tube using water and an expansion agent and a flexible busbar using the same, and is constituted by including a busbar core 10 and a shrinkable tube 20 as main configurations. The shrinkable tube is expanded using an aqueous system of immersing and expanding the shrinkable tube in a solution mixed with water and an expansion agent for a predetermined time, the expanded shrinkable tube is naturally shrunk at room temperature and simply tubed on an outer circumferential surface of a busbar core to be insulated and coated, and in particular, the busbar core maintains the integrity with the shrinkable tube by a structure engaging with an intaglio-relief structure by a shrinkage force of the shrinkable tube so as to prevent deformation including lifting and wrinkling of the shrinkable tube when the shape of the busbar is deformed.

This invention relates to a method for manufacturing a room temperature shrinkable tube using water and an expansion agent and a flexible busbar using the same, and is constituted by including a busbar core 10 and a shrinkable tube 20 as main configurations. The shrinkable tube is expanded using an aqueous system of immersing and expanding the shrinkable tube in a solution mixed with water and an expansion agent for a predetermined time, the expanded shrinkable tube is naturally shrunk at room temperature and simply tubed on an outer circumferential surface of a busbar core to be insulated and coated, and in particular, the busbar core maintains the integrity with the shrinkable tube by a structure engaging with an intaglio-relief structure by a shrinkage force of the shrinkable tube so as to prevent deformation including lifting and wrinkling of the shrinkable tube when the shape of the busbar is deformed.

A basic insulating plug and an electric system. The basic insulating plug includes an insulating housing, a first conductor, a first RFID tag and insulating filler. The first conductor includes a first end arranged in the insulating housing. The first RFID tag is located at an end surface of the first end or on a lateral side of the first conductor. The first RFID includes a temperature sensor configured to measure a temperature of the first conductor, an integrated circuit coupled to the temperature sensor and configured to receive a signal indicative of the temperature from the temperature sensor, and an antenna coupled to the IC and configured to transmit temperature data based on the signal and receive electric power for powering the RFID tag. The insulating filler is adapted to fix the first RFID to the first conductor by filling a void between the first conductor and an internal surface of the insulating housing.

A basic insulating plug and an electric system. The basic insulating plug includes an insulating housing, a first conductor, a first RFID tag and insulating filler. The first conductor includes a first end arranged in the insulating housing. The first RFID tag is located at an end surface of the first end or on a lateral side of the first conductor. The first RFID includes a temperature sensor configured to measure a temperature of the first conductor, an integrated circuit coupled to the temperature sensor and configured to receive a signal indicative of the temperature from the temperature sensor, and an antenna coupled to the IC and configured to transmit temperature data based on the signal and receive electric power for powering the RFID tag. The insulating filler is adapted to fix the first RFID to the first conductor by filling a void between the first conductor and an internal surface of the insulating housing.

An insulator pin for overhead electrical lines has a frangible portion. The pin has an elongate support for attachment to an electrical distribution pole and a body. The body has a connector for an insulator, a frangible portion and an elongate support holding portion from which the elongate support extends. Preferably the elongate support is a bolt. The frangible portion permits the body to break into two pieces for preventing damage to electrical distribution poles from forces transverse to the overhead electrical line. The frangible portion is located between the connector and the elongate support holding portion. The insulator pin may be attached to an electrical distribution pole to protect the pole from forces transverse to an overhead electrical lines supported by the pole. A method of making the insulator pin by molding is disclosed.

An insulator pin for overhead electrical lines has a frangible portion. The pin has an elongate support for attachment to an electrical distribution pole and a body. The body has a connector for an insulator, a frangible portion and an elongate support holding portion from which the elongate support extends. Preferably the elongate support is a bolt. The frangible portion permits the body to break into two pieces for preventing damage to electrical distribution poles from forces transverse to the overhead electrical line. The frangible portion is located between the connector and the elongate support holding portion. The insulator pin may be attached to an electrical distribution pole to protect the pole from forces transverse to an overhead electrical lines supported by the pole. A method of making the insulator pin by molding is disclosed.

Provided are a molding step (A) of preparing an alumina molded body 11 from a molding raw material which contains an alumina raw material powder having an average particle size of 2 m to 5 m and a molding additive, and a sintering step (B) of preparing an alumina molded body 12, which becomes a spark plug insulator 1, by sintering the alumina molded body 11. At the sintering step (B), the alumina molded body 11 is conveyed to a continuous furnace 100 provided with a heating zone Z1 which is heated to 700 C. to 1600 C. by a heating means 401, followed by introducing oxygen gas to control the heating zone Z1 to have a high oxygen atmosphere with an oxygen concentration exceeding 20 mol %.