Archive | Cables

Insulated Cables: Conductors, Material and Heating | Electricity

In this article we will discuss about:- 1. Introduction to Insulated Cables 2. Insulated Cable Conductors 3. Insulating Materials 4. Capacitance of Three-Core Belted Type Cables 5. Heating 6. Operating Problems. Contents: Introduction to Insulated Cables Insulated Cable Conductors Insulating Materials for Cables Capacitance of Three-Core Belted Type Cables Heating of Insulated Cables Operating Problems Associated with Underground Insulated Cables [...]

By Anshika R|2017-11-09T17:47:49+05:30November 9, 2017|Cables|Comments Off

Construction of an Underground Cable | Electrical Engineering

The general construction of an underground cable is given below: The underground cable employed for transmission of power at high voltage consists of one central core or a number of cores (two, three or four) of tinned stranded copper or aluminium conductors insulated from each other by paper or varnished cambric or vulcanized bitumen or impregnated paper. A metallic sheath [...]

By Anshika R|2017-11-09T17:47:48+05:30November 9, 2017|Cables|Comments Off

Insulating Materials Used for Manufacturing Cables | Electricity

Here is a list of ten main insulating materials used to manufacture electric cables. Material # 1. Rubber: Rubber may be natural and synthetic. Natural rubber is obtained from the milky sap of tropical trees. Synthetic rubber is produced from alcohol or oil products. Its relative permittivity is between 2 and 3 and dielectric strength is 30 kV/mm. Though it [...]

By Anshika R|2017-11-09T17:47:48+05:30November 9, 2017|Cables|Comments Off

Classification of Cables | Electrical Engineering

The type of cable to be used at a particular location is determined by the mechanical considerations and the voltage at which it is required to operate. Usually the operating voltage determines the type of insulation and the cables are placed in various categories depending upon the voltage for which they are designed. 1. Low Tension (or LT) Cables: These [...]

By Anshika R|2017-11-09T17:47:48+05:30November 9, 2017|Cables|Comments Off

Grading of Cables: 2 Methods | Electrical Engineering

The process of achieving uniformity in dielectric stress is known as grading of cables. There are two methods of grading viz.: 1. Capacitance Grading 2. Intersheath Grading. Method # 1. Capacitance Grading: In this method of cable grading, the uniformity in dielectric stress is achieved by using various layers of different dielectrics in such a manner that the permittivity, ∈r [...]

By Anshika R|2017-11-09T17:47:48+05:30November 9, 2017|Cables|Comments Off

Single Core Cables: Capacitance and Dielectric Stress | Electricity

In this article we will discuss about:- 1. Insulation Resistance of a Single Core Cable 2. Capacitance of a Single Core Cable 3. Dielectric Stress. Insulation Resistance of a Single Core Cable: The cable conductor is provided with an insulation of suitable thickness so as to avoid leakage of current. The path for leakage current is radial, as shown in [...]

By Anshika R|2017-11-09T17:47:48+05:30November 9, 2017|Cables|Comments Off

The Most Economical Conductor Diameter for Cables | Electricity

For a given voltage and overall diameter of a single core cable there is a certain value of the conductor radius (or core) diameter that gives a minimum potential gradient at the surface. A small conductor radius allows a greater insulation thickness, but on the other hand, the smaller radius of curvature tends to increase the stress; while the effect [...]

By Anshika R|2017-11-09T17:47:48+05:30November 9, 2017|Cables|Comments Off

Top 4 Types of Cables | Conductors | Electrical Engineering

Different types of insulated wires and cables used for house wiring and service connections are:- 1. Flexible Cord and Flexible Cable 2. Paper Insulated Cable 3. Tropodur Cables 4. Mineral Insulated Cable or M.I. Cable. Type # 1. Flexible Cord and Flexible Cable: The stranded wire having cross-sectional area of each strand less than 4.28 mm2 is called flexible cord. [...]

By Mumtaznash|2017-04-21T09:03:38+05:30April 21, 2017|Cables|Comments Off