Differences Between Earthed and Unearthed Cables
In HT electrical distribution, the system can be earthed or unearthed. The selection of unearthed or earthed cable depends on distribution system. If such system is earthed, then we have… Read more
Jan 21, 2013 | By jiguparmar
Arrangements of LV Utility Distribution Networks (2)
Continued from the previous part: Arrangements of LV Utility Distribution Networks (1) In the past, an underground cable service or the wall-mounted insulated conductors from an overhead line service, invariably terminated… Read more
Dec 01, 2012 | By Edvard Csanyi
Arrangements of LV Utility Distribution Networks
In European countries the standard 3-phase 4-wire distribution voltage level is 230/400 V. Many countries are currently converting their LV systems to the latest IEC standard of 230/400 V nominal… Read more
Nov 30, 2012 | By Edvard Csanyi
Electrical Safety Standards for LV/MV/HV (Part-3)
Continued from part 2 – Electrical Safety Standards for LV/MV/HV (Part-2) Standard: Northern Ireland Electricity (NIE), 6/025 ENA Code: Indian Electricity Rules / Central Electricity Authority Right of Way Clearance… Read more
Nov 14, 2012 | By jiguparmar
Electrical Safety Standards for LV/MV/HV (Part-2)
Continued from part 1 – Electrical Safety Standards for LV/MV/HV (Part-1) Standard: Northern Ireland Electricity (NIE), 6/025 ENA Clearances of Electrical Line to Ground and Roads Clearances of Electrical Line… Read more
Nov 12, 2012 | By jiguparmar
Electrical Safety Standards for LV/MV/HV (Part-1)
Standard: Western Power Company Water Safely Clearance on Electrical Fires Minimum Approach Distance for Authorized Person Minimum Approach Distance for Ordinary Person Minimum Approach Distance for Vehicle and Plant for… Read more
Nov 07, 2012 | By jiguparmar
Testing and Commissioning of Metal-Clad Switchgear
Electrical testing and commissioning of Metal-Clad switchgear is essential to the safe start for the first time, regardless of its size, type or industry. This article covers testing and start-up… Read more
Sep 24, 2012 | By Edvard Csanyi
The major components of an Air Circuit Breaker and the Arc Interruption
The basic characteristics for air magnetic circuit breakers are maximum rationalization and constructional simplicity. The major components of such breakers are: the poles, the arc chutes, the base frame, the operating mechanism…. Read more
Jul 25, 2012 | By Edvard Csanyi
The main components of an oil circuit breaker and how does it interrupt the arc
They are simple in construction. The major parts of a minimum oil circuit breaker excluding the poles are the base frame,the drive which is constructed as a stored energy opening… Read more
Jul 24, 2012 | By Edvard Csanyi
Bus Design In Aboveground Substations
Substations can be constructed partly or entirely within aboveground or belowground enclosures. However, cost is high and complexity is increased by fire-protection and heat-removal needs. The following discussion deals with… Read more
Jul 21, 2012 | By Edvard Csanyi
Field Inspection of New Medium-Voltage Switchgear
Step Description of what you should do 1.1 Check switchgear assembly for alignment, levelness, and tightness of all bolting. 1.2 Check all equipment for the removal of blocking, supports, temporary… Read more
Jul 16, 2012 | By Edvard Csanyi
The Role of Circuit Breakers in LV/MV Power Systems
A circuit breaker is protective device which is designed to automatically open an electrical circuit thus preventing harm and damages to equipment and personnel. The damages are due to over… Read more
Jul 09, 2012 | By Edvard Csanyi
Assemblies of switchgear and control panels (2)
Continued from 1st part of article: Assemblies of switchgear and control panels (part 1) Other components that are needed for the proper operation of the switchgear or control panel but not necessarily… Read more
Jun 29, 2012 | By Edvard Csanyi
Assemblies of switchgear and control panels
Switchgear and control panels are found in power generating stations, transformer stations, distribution substations, commercial and institutional buildings, industrial plants and factories, refineries, paper mills, metal smelters and any other… Read more
Jun 28, 2012 | By Edvard Csanyi
Circuit breakers classified by interrupting medium
A circuit breaker is defined as “a mechanical switching device capable of making, carrying and breaking currents under normal circuit conditions and also making, carrying and breaking for a specified… Read more
Jun 20, 2012 | By Edvard Csanyi