Cables Library

Cables Library

➣ Introduction

     Comparison of Underground Cables and Overhead lines

➣ Requirement of the Cable

➣ General Construction of a Cable

➣ Types of Cables

➣ Belted Cables

➣ Screened Type Cables

     H Type Cables

     S.L. Cables

➣ Super Tension (S.T.) Cables

➣ Oil Filled Cables

     Advantages

     Disadvantages

➣ Gas Pressure Cables

     Advantages

➣ Insulating Material for Cables

     Poly Vinyl Chloride (PVC)

     Paper

     Cross Linked Polythelene

     Vulcanised India Rubber (VIR)

➣ Insulation Resistance of a Cable

➣ Capacitance of a Single Core Cable

     Stress in Insulation

     Economical Core Diameter

➣ Grading of Cables

➣ Use for Intersheaths for Grading

➣ Capacitance Grading

     Condition for Equal Maximum Stress

➣ Difficulties in Grading

➣ Capacitance of  Three Core Cables

     Measurement of Cs and C_c

     Capacitance of Three Core Cables

➣ Heating of Cables

     Copper Loss in Cables

     Dielectric Loss

     Sheath Loss

➣ Heat Flow in a Cable
     Thermal Characteristics of Cable

     Thermal Resistance of Single Core Cable

     Thermal Resistance of Soil

➣ Current Rating of a Cable

➣ Testing of Cables

     Murray Loop Test

     Fall of Potential Test

     D.C. Charge and Discharge Test