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Technical Articles

Cables

Discussing About LV And HV Electrical Cables

Space is really a critical criterion when discussing electrical cables and wires. In a low-voltage (LV) plastic-sheathed cable with conductor cross-sections of up to 10 mm2 per conductor or in… Read more

Feb 08, 2012 | By Edvard

High-voltage cable cross section
Maintenance

Purpose and maintenance of transformer bushings

The two most common types of bushings used on transformers as main lead entrances are solid porcelain bushings on smaller transformers and oil-filled condenser bushings on larger transformers. Solid porcelain… Read more

Feb 05, 2012 | By Edvard

Transformer porcelain bushings spare parts
Electrical Lectures

About Permeability And Permitivity

The strength of electric field or electrostatic force strength or intensity of field (all synonymous terms) is measured & expressed in terms of force experienced by unit positive charge placed… Read more

Feb 01, 2012 | By Asif Eqbal

Electric field intensity - closed path denoted by ABCD
High Voltage

Ceramic (Porcelain and Glass) Insulators

Porcelain is the most frequently used material for insulators. Insulators are made of wet, processed porcelain. The fundamental materials used are a mixture of feldspar (35%), china clay (28%), flint… Read more

Jan 27, 2012 | By Edvard

Porcelain insulators collection
Energy and Power

Glossary of Medium Voltage Switchgear Terms

This glossary was published originally by Schneider Electric and it is intended to cover the meaning of many common words and phrases used in association with medium voltage switchgear. Many… Read more

Jan 25, 2012 | By Edvard

Energy and Power

Anti Pumping And Lockout Relays

What is ANSI code for Antipumping relay? ANSI codes 94 or even 52 can be used. Relays can be divided into six functional categories shown below: Detect defective lines, defective… Read more

Jan 23, 2012 | By Asif Eqbal

Anti-pumping relay - Powell
Energy and Power

UK Electrical Industry British Standards (BS)

These standards are the whole of the prescriptions on the basis of which machines, apparatus, materials and the installations should be designed, manufactured and tested so that efficiency and function… Read more

Jan 20, 2012 | By Edvard

British Standards (BSI)
Cables

EHV/HV Underground Cable Sheath Earthing (part 1/2)

In urban areas, high voltage underground cables are commonly used for the transmission and distribution of electricity. Such high voltage cables have metallic sheaths or screens surrounding the conductors, and/or… Read more

Jan 19, 2012 | By jiguparmar

21/35(40.5)KV 3-core XLPE/PVC/steel tape armor power cable
High Voltage

Segregated Phase Bus System

In this construction all the phases are housed in one metallic enclosure as earlier, but with a metallic barrier between each phase, as illustrated in Figure 1. The metallic barriers provide the required… Read more

Jan 18, 2012 | By Edvard

Segregated phase bus system
Energy and Power

How lightning really works? (video)

A lightning discharge develops in three stages: first, the collisions between ice particles and water droplets together with gravity separate positive and negative charges inside the thunder cloud and buildup… Read more

Jan 17, 2012 | By Edvard



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