IEEE 1637-2010 pdf download IEEE Guide to Select Terminations for Shielded Alternating-Current Power Cable Rated 5 kV- 46 kV
2. Normative references
The following referenced documents are indispensable for the application of this document (i.e., they mustbe understood and used, so each referenced document is cited in text and its relationship to this document isexplained). For dated references, only the edition cited applies. For undated references, the latest edition ofthe referenced document (including any amendments or corrigenda) applies.
IEEE Std 48M,IEEE Standard for Test Procedures and Requirements for Alternating-Current CableTerminations used on Shielded Cables having Laminated Insulation Rated 2.5 kV through 765 kV orExtruded Insulation Rated 2.5 kV through 500 ky.
NOTE–All terminations discussed in this guide meet the requirements set forth in IEEE Std 48.
3. Definitions
For the purposes of this document, the following terms and definitions apply. The IEEE StandardsDictionary: Glossary ofTerms & Definitions should be referenced for terms not defined in this clause.
apparatus termination: A termination designed for use in sealed enclosures where the external dielectricstrength is dependent upon liquid or special gaseous dielectric and where the ambient temperature of themedium immediately surrounding the termination may reach 65 C.
NOTE– The temperature change from 55 °C to 65 °C was recommended to match the switchgear specification of65%C.
extruded polymeric cable: A cable insulated with a polymer such as ethylene propylene rubber.
polyethylene, or a similar synthetic plastic or rubber that is applied through the extrusion process.
ethylene propylene rubber cable (EPR): A cable insulated with extruded ethylene propylene rubber orsimilar synthetic rubber.
impregnated, paper insulated, lead covered cable (PILC): A cable whose primary insulation is papertapes impregnated with dielectric fluid and sealed from moisture with a solid lead sheath.
polyethylene cable (PE): A cable insulated with extruded polyethylene, crossed-linked polyethylene, treeretardant crossed-linked polyethylene or other similar polymer.
routine tests: Tests made on each cable termination or upon a representative number of devices, or partsthereof, during production for purposes of quality control.
、4. Termination
4.1 Termination theory
4.1.1 Shielded power cable configuration
Shielded power cable is designed with two concentric conductors, one within the other separated by aninsulating material.The coaxial configuration forces the electric field energy associated with the alternatingcurrent (ac) into a symmetrical pattern. This configuration causes the total insulation to symmetricallycontain the electric forces within the cable.
4.1.2 Dielectric field
in all shielded power cable. an electric field exists when the conductor is energized. This dielectric field canbe depicted graphically with the use of electrostatic flux lines and equi-potential lines (see Figure 1)Electrostatic flux lines represent the electric stress between electrodes having different electric potential.Equ-potential lines represent points of equal potential between electrodes having different electricpotential. They represent the radial voltage stresses in the insulation and their relative spacing indicates themagnitude of the voltage stress: the closer the lines, the higher the stress.