Low Voltage
Few good tips for low voltage switchgear maintenance and care
The low voltage switchgear involves many devices like power circuit breakers, MCBs, aux. relays, CTs, VTs etc. and of course at the end – enclosures (indoor or outdoor type). The frequency of inspection and maintenance of low voltage switchgear should be… Read more
Jul 18, 2016 | By Edvard Csanyi
Energy and Power
Electricity and water do not form a happy partnership, do they?
Electricity and water do not form a happy partnership and so it is often necessary to “dry out” insulation. This may be done to remove surface moisture or perhaps to drive moisture from the internals of the insulation. Indeed some… Read more
Jul 13, 2016 | By Edvard Csanyi
Energy and Power
What would be the best conductor material for electrical wires and cables
The conductivity of copper is 65% higher than that of aluminium which means that the conductor size of similarly rated cables is proportionately smaller. Correspondingly less expense is then incurred in providing for insulation, shielding and armouring the cables themselves…. Read more
Apr 09, 2016 | By Edvard Csanyi
Maintenance
How to better understand transformer failures and maintenance necessity
Generally speaking, the transformer requires less care compared to other electrical equipment. But, as I already stated in some of the earlier technical articles, transformer failures can cause a huge problem in power system, since it’s one of the most… Read more
Mar 30, 2016 | By Edvard Csanyi
Energy and Power
Where do electrical faults occur the most?
A fault is not a natural occurrence. It is an unplanned event which occurs unexpectedly. Electrical faults in an electrical installation or piece of equipment may be caused by: Negligence (that is, lack of proper care and attention), Misuse (that is,… Read more
Feb 01, 2016 | By Edvard Csanyi
High Voltage
Seven Methods To Avoid Insulator Flashovers
Contamination caused insulator flashovers produce frequent outages in severely contaminated areas. Lines closer to the ocean are in more danger of becoming contaminated. Several countermeasures have been proposed to improve insulator performance. The most frequently used methods are: Increasing leakage… Read more
Oct 14, 2015 | By Edvard Csanyi
Testing and Commissioning
5 components of current drawn by the DC voltage testing of insulation
When DC voltage is applied to an insulation, the electric field stress gives rise to current conduction and electrical polarization. Consider an elementary circuit as shown in Figure 1 below, which shows a DC voltage source, a switch, and an… Read more
Jun 19, 2015 | By Edvard Csanyi
Power Substation
6 Transformer Types You Can See In Commercial Installations
Transformers in commercial installations are normally used to change a voltage level from a utility distribution voltage to a voltage that is usable within the building, and are also used to reduce building distribution voltage to a level that can… Read more
Mar 16, 2015 | By Edvard Csanyi
Low Voltage
Degradation of Insulation in Switchgear (What’s Really Happening)
Electrical insulation is subjected to electrical and mechanical stress, elevated temperature and temperature variations, and environmental conditions especially for outdoor applications. In addition to normal operating conditions, there are a host of other factors that may trigger accelerated aging or… Read more
Mar 04, 2015 | By Edvard Csanyi
Energy and Power
4 essential qualities of electrical protection
In generating stations, all electrical circuits and machines are subject to faults. A fault is generally caused by the breakdown of insulation between a conductor and ground or between conductors due to a variety of reasons. The result is a… Read more
Nov 03, 2014 | By Edvard Csanyi
Power Substation
Why is continuous on-line monitoring of partial discharge in the switchgear necessary?
Not sure? You know that periodical maintenance test like partial discharge test can still leave switchgear in virtually unknown condition. Insulation defects and deterioration may very well develop in service within maintenance cycle. These defects are often not detectable with… Read more
Jun 16, 2014 | By Edvard Csanyi
Energy and Power
Electrical Preventive Maintenance of Air Circuit Breakers
Remove and clean interphase barriers. Clean all insulating materials with vacuum and/or clean lint free rags. If it is necessary to use cleaning solvents, use only solvents recommended by the manufacturer. Inspect for (early) signs of corona, tracking, arcing, or… Read more
Feb 07, 2014 | By Edvard Csanyi
Electric Motor
Selection of Induction Motors for Industrial Applications (part 2)
Continued from first part: Selection of Induction Motors for Industrial Applications (part 1) Though standard motors are now available with a better efficiency, this factor (motor efficency) requires due attention when making the selection of the motor for a specific… Read more
May 04, 2013 | By Ashok Parikh
Cables
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 to use cable which is manufactured for earthed system. (which… Read more
Jan 21, 2013 | By Jignesh Parmar
Energy and Power
Inspection and Test Procedures for Metal-Enclosed Busways
Visual and Mechanical Inspection Electrical Tests Test Values Test Values – Visual and Mechanical Test Values – Electrical Tables: TABLE 100.12 – US Standard Fasteners Bolt-Torque Values for Electrical Connections TABLE 100.1 – Insulation Resistance Test Values Electrical Apparatus and… Read more
Dec 22, 2012 | By Edvard Csanyi
