Magnet wire with corona resistant enamel insulation is described. A magnet wire may include a conductor, and at least one layer of polymeric enamel insulation may be formed around the conductor. The polymeric enamel insulation may include a filler dispersed in polyimide. The filler may include between 20 percent and 80 percent by weight of silica oxide and between 20 and 80 percent by weight of titanium oxide.

A thin micro-multilayer electrical insulator having a plurality of layers of polymeric materials is high performance and lightweight. The insulator provides a structured material with improved dielectric strength and partial corona discharge resistance that can be used in high voltage and high temperature applications. The durable insulator is well suited for use in insulating high voltage aircraft wiring and power transmission composites in hybrid and all electric airplanes. The insulator can have multiple layers of different polymeric materials such as fluorine-containing polymers and polyimides.

A valve assembly that includes a valve body, a poppet member, and a biasing member. The valve body has an internal through-channel. The poppet member has an inside portion positioned at least partially inside the through-channel and an outside portion positioned outside the through-channel and extending outwardly beyond the valve body. The poppet member is movable within the through-channel between an open position and a closed position. The biasing member is external to the valve housing and applies a biasing force to the outside portion of the poppet member that biases the poppet member toward the closed position.

A peroxide-curable polyolefin composition comprising a peroxide-curable polyolefin prepolymer, an organic peroxide, and 4-[[4,6-bis(octylthio)-1,3,5-triazin-2-yl]amino]-2,6-bis(1,1-dimethylethyl)-phenol. Also, a peroxide-cured polyolefin product prepared therefrom, methods of making and using same, and articles containing or made from same.

A gas resistant pothead system and method for electric submersible motors. A gas resistant pothead system includes a lead foil wrapped motor lead cable (MLE) extending through a pothead, a sleeve of an insulator block inside the pothead, the sleeve including gold plating and lead-foil wrapping over the gold plating, and a lead-to-gold seal formed between the gold plating of the sleeve and the lead foil wrapping over the gold plating. A method of creating a seal to gas around a power cable connection to a downhole electric submersible motor includes wrapping lead foil around a MLE extending through a pothead, continuing the lead foil wrapping around a gold-plated sleeve of an insulating block inside the pothead, mechanically reinforcing the lead foil with an encapsulant, and bonding the lead foil to the gold plating of the insulating block.

Disclosed is the present disclosure relates to a marine cable for offshore wind power having an improved water-tree property. More particularly, it relates to a marine cable for offshore wind power, which may effectively suppress formation of water trees caused by diffusion of moisture, having penetrated into cores of the cable, in insulating layers so as to improve dielectric strength and consequently secure a long lifespan.

The present disclosure provides an insulation withstand voltage detection method and detection device for a wiring harness, and an automobile wiring harness assembly line. The insulation withstand voltage detection method for the wiring harness includes: step S10: placing a to-be-detected wiring harness in an enclosed cavity, in which a conductive electrode plate is disposed in the enclosed cavity, and the to-be-detected wiring harness has one end insulated and enclosed, and the other end connected to a power supply; step S20: reducing air pressure in the enclosed cavity; step S30: providing a test voltage by the power supply; and step S40: detecting a voltage of the to-be-detected wiring harness, and/or detecting a leakage current of the to-be-detected wiring harness. Through the present disclosure, it alleviates the technical problem in the prior art that the dielectric insulation detection of a high-voltage wiring harness cannot realize the in-line detection of finished products.

A method for rejuvenating a strand-blocked cable having a conductor comprised of a plurality of conductor strands with interstitial volume therebetween blocked by a PIB based mastic, the conductor being surrounded by a polymeric cable insulation. The method comprising installing injection adapters that seal the cable ends of the cable and are usable to inject fluid into the interstitial volume between the conductor strands of the cable; elastically expanding the polymeric cable insulation through the application of pressure to the interstitial volume between the conductor strands of the cable; and injecting at least one injection fluid in which the PIB based mastic is at least partially soluble into the interstitial volume between the conductor strands of the cable. To facilitate elastic deformation of the polymeric cable insulation, the cable may be heated to and maintained at a temperature of T1 above ambient during the injection.

A gas resistant pothead system and method for electric submersible motors. A gas resistant pothead system includes a lead foil wrapped motor lead cable (MLE) extending through a pothead, a sleeve of an insulator block inside the pothead, the sleeve including gold plating and lead-foil wrapping over the gold plating, and a lead-to-gold seal formed between the gold plating of the sleeve and the lead foil wrapping over the gold plating. A method of creating a seal to gas around a power cable connection to a downhole electric submersible motor includes wrapping lead foil around a MLE extending through a pothead, continuing the lead foil wrapping around a gold-plated sleeve of an insulating block inside the pothead, mechanically reinforcing the lead foil with an encapsulant, and bonding the lead foil to the gold plating of the insulating block.

A filler and a multicore cable includes a plurality of core portions, which includes a conductor, and a protective layer that surrounds the core portions, the filler being provided between the core portions and the protective layer of the multicore cable, the filler being characterized by including: frame portions including a first frame portion and a second frame portion, which are rotated by predetermined angles towards both sides about the center portion thereof and then incised; and a support portion provided between the frame portions so as to connect the frame portions to each other.