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Monthly Archive for: «January, 2012»

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 (25%), ball… Read more

Jan 27, 2012 | Edvard

Porcelain insulators collection

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 terms will… Read more

Jan 25, 2012 | Edvard

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 apparatus, or… Read more

Jan 23, 2012 | Asif Eqbal

Anti-pumping relay - Powell

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 safety are… Read more

Jan 20, 2012 | Edvard

British Standards (BSI)

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 armour and… Read more

Jan 19, 2012 | jiguparmar

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

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 magnetic shielding and… Read more

Jan 18, 2012 | Edvard

Segregated phase bus system

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 a voltage…. Read more

Jan 17, 2012 | Edvard

Luminous Measurement Graphic Representation

The collection of luminous intensity emitted by a source of light in all directions is known asluminous distribution. The sources of light used in practice have a more or less large luminous… Read more

Jan 16, 2012 | Edvard

Goniophotometer
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