IEEE 1637:2010 pdf free download

IEEE 1637:2010 pdf free download.IEEE Guide to Select Terminations for Shielded Alternating-Current Power Cable Rated 5 kV – 46 kV.
Once the proper connector is selected, the manufacturer’s recommendation for tooling and installation shall be carefully followed in order to provide a proper connection. It is very important to follow the tooling recommendations and installation procedures required for the connector. Selection of the proper tool and die combination is important to maximize electrical contact between the connector and the various strand layers within the conductor without overly reducing the mechanical strength of the conductor at the transition to the connector. A poor connector installation leads to problems with the cable termination during the service life of the cable system.
4.2.2.2 Soldered and welded connectors
Soldered and welded connectors require the application of heat. The choice of this type of connector can depend on the environment of application and the type of support equipment available. For example, use of a torch in a confined space can consume the oxygen, requiring adequate ventilation to meet safety requirements. Confined spaces can also pose an issue when volatile solvents are used to clean cable ends. Vapor concentrations and flammability of the vapor become important issues.
When heat is applied to a connector, it is conducted into the surrounding materials. When these materials are polymers with relatively low melting points, cable insulation and shields can become damaged or even burn.
To maximize conduction of current across a welded or soldered joint, care should be exercised to till internal voids within the connection with solder or the weld material. Similarly, the metals are required to all bond together properly, making it necessary that a minimum temperature be reached. Fluxes may be required to maximize metal flow and bonding for a good electrical connection.
4.2.2.3 Bolted and Set Screw Connectors
Bolted and set screw connections should be torqued to the manufacturer’s specifications. Special tooling may be required for this purpose, although “break away” connectors are becoming more common. On “break away” connectors, the bolt or set screw is designed to shear in two at the required torque.
Oxidation inhibitors should be applied to bolted and set screw connectors.
4.2.3 ElectrIc stress relief
A shielded power cable is composed of a conductor, a conductor shield, insulation, a coaxial insulation shield, a metallic shield or sheath, and may or may not have an overall jacket. The conductor shield and insulation shield are generally formed of semiconductive material that is compatible with the cable insulation. The coaxial conductor and insulation shields cause the electric field within the cable insulation to be uniformly distributed, thus allowing optimization of the insulation thickness. Metallic shields are available in a wide variety of designs, including tapes, wires, and straps that are applied in helical, longitudinal, or corrugated designs. Many factors influence the choice of a metallic shield design, including such issues as shield losses, short circuit duty, magnetic forces during faults, and historic practices by the user.