Low Voltage
Good operating practices for switchgear circuit breakers and contactors
The purpose of this guideline is to provide suggested practices for the operation and inspection of medium voltage (2 to 13.8 kV) and low voltage (200 to 480 volt) draw-out switchgear circuit breakers and contactors. Good operating practices are critical… Read more
Jan 20, 2025 | By Edvard Csanyi
Maintenance
Bringing new life to an old Air-Insulated Substation (AIS)
An increasing number of substations globally are aging, while the construction of new ones is hindered by competitive limitations, rigorous environmental rules, and community acceptance issues. Simultaneously, the demand for electricity is consistently escalating, resulting in increased short circuit levels… Read more
Nov 07, 2024 | By Edvard Csanyi
Maintenance
Practical lesson in grounding and bonding of Gas-Insulated Switchgear (GIS)
With the exception of SF6-to-air bushings terminals, all active portions of gas-insulated switchgear (GIS) are contained within grounded enclosures, which means that they are not susceptible to inadvertent contact. This makes gas-insulated switchgear intrinsically safe. In addition, numerous grounding procedures… Read more
Oct 09, 2024 | By Edvard Csanyi
Maintenance
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Managing power transformers in service: The most important economic aspects
Utilities are under intense pressure to maximize the use of their current transformer asset base in order to keep rates down while yet providing excellent reliability. In order to achieve higher loading during both regular and emergency operations, long-standing loading…...
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Sep 16, 2024 | By Edvard Csanyi
Maintenance
Substation Equipment Maintenance: Often Neglected Until Something Big Drops Dead
The aging process starts the moment new substation equipment is put into service; how quickly it happens depends on a number of factors, including the equipment’s use, the environment, the quality of maintenance, and many more. However, things aren’t the… Read more
May 13, 2024 | By Edvard Csanyi
Electrical Machines
Insulation tests on electric motors and generators: DC High Potential Testing (HiPot)
The objective of this technical article is to provide certain criteria and time intervals for conducting insulation tests on electric motors, generators and other electrical equipment. Testing is done to ensure that the equipment is intact and to provide a… Read more
Nov 06, 2023 | By Edvard Csanyi
Maintenance
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Field secrets and warnings in power transformer mechanical check and visual inspection
Let’s discuss the visual and mechanical inspection procedures for oil-filled power transformers. It’s important, very important to examine a variety of key checkpoints, both external and internal to transformers, all based on the IEC 60076 standard. Each item on the…...
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Sep 11, 2023 | By Muhammad Kashif
Maintenance
Thoughtful considerations to design MV/LV distribution substations for extended service life
The installation of a new MV/LV electrical substation is often part of a more global project, and it is not always the subject of very detailed attention. However, the consideration of simple and practical criteria is not always dictated by… Read more
Sep 04, 2023 | By Power Systems and Services
Maintenance
With EEP's premium membership, you get additional essence that enhances your knowledge and experience in low- medium- and high-voltage engineering fields.Upgrade
Advice and warnings for proper handling, earthing and testing of current transformers
Welcome to the third and final part of our comprehensive series on current transformers (CTs) and their secondary circuits. In Parts 1 and 2, we covered various aspects of CT operation, secondary injection testing, burden calculations, CT circuit connections, safety…...
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Jul 31, 2023 | By Muhammad Kashif
Maintenance
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A detailed checklist for the installation and commissioning of Gas-Insulated Substations (GIS)
Gas-insulated substations (GIS) are critical components of modern electrical power systems, providing efficient and compact solutions for the transmission and distribution of electricity. These substations utilize sulfur hexafluoride (SF6) gas as an insulating and arc-quenching medium, offering several advantages over…...
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Jul 17, 2023 | By Muhammad Kashif
Maintenance
Choosing between AIS and GIS substation design: Factors you MUST take into consideration
For the last sixty years, gas-insulated substation (GIS) has been used in applications related to substations all over the world, and this use of the technology is becoming an increasingly common asset for those who make use of substations. GIS… Read more
Jul 10, 2023 | By Edvard Csanyi
Maintenance
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The art of predicting the fate of a power transformer by looking into a cup of oil
Insulation medium is an indispensable part of a power transformer, and the interesting thing about it is that it can drop dead at any time. Most of the time, this doesn’t happen, but… This article presents the transformer oil features…...
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Jan 09, 2023 | By Salem Alshahrani
Maintenance
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The most common Gas-Insulated Switchgear (GIS) faults and a case of 220kV CB cubicle
Over decades since its inception, GIS switchgear demand is still prevalent in these present times due to its compact built, reliability, and maintenance advantages compared to conventional Air-insulated switchgear. Even the strong negative effect on the environment when its gas…...
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Oct 17, 2022 | By Lark C. Cosedo
Energy and Power
Key points on how to design a fault-tolerant and reliable facility distribution system
Nowadays, power system reliability is more important than ever. Regardless of how reliable the individual power-system components may be, some sort of power-system redundancy is necessary to attain high levels of power-system reliability, with the ultimate aim being 24 hour/day… Read more
Jul 18, 2022 | By Edvard Csanyi
Maintenance
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Capacitor banks protection, cautions and maintenance tips
It would not be wrong to say that humanity has never consumed so much electricity, and to make the paradox bigger, there is still a lack of energy. The sharp increase in consumption in the last couple of decades has…...
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Apr 04, 2022 | By Rahmatullah Alam
