Learn how to read and analyze control circuits of MV gas insulated switchgear (GIS)
Previously, an introductory part of the GIS and its components were discussed to pave the way for the GIS control circuits. Moreover, the single-line diagram example for a double-bus and a single breaker clarifies several…...
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Jan 25, 2021 | Salem Alshahrani
How to measure power quality? What devices should you use and what to measure?
Measuring power quality and finding a bugbear in the network which is messing with the power are considered a highly paid job. Every electrical network and its problems with harmonics, transients, or disturbances are unique… Read more
Jan 18, 2021 | Edvard
Troubleshooting the most typical winding problems of three phase electric motors
It’s always important to identify the real cause of burned windings and not just to replace the electric motor. Motor windings have a different appearance in all these failure situations: single-phase burnout, overload, unbalanced voltage,… Read more
Dec 21, 2020 | Edvard
Testing and commissioning of MV/HV switchgears (wiring, final inspection and checks)
This article continues the series of articles dedicated to erection, testing and commissioning of MV/HV switchgears by describing the most important precautions and recommendations in various procedures and steps. Starting from the wiring of low… Read more
Oct 28, 2020 | Edvard
Guide to erection and commissioning of MV/HV switchgears (Inspection, installation and assembly)
Erection and commissioning of MV/HV switchgear are quite complex and full of tiny little details that can easily make your project slow down or even stop. Not to mention deadlines and penalties which are hanging… Read more
Oct 26, 2020 | Edvard
13 terms concerning relaying, measurements, and breakers used by protection engineers
It’s not unusual to see graduates and engineers from other disciplines experience difficulties in properly interpreting the terminology used in applying relays, analyzing their performance, and designing protection systems. Actually, this is normal, but during… Read more
Oct 07, 2020 | Edvard
Hints on installation and commissioning power transformers (experience and recommendations)
Purchasing a power transformer for a project is always challenging for every electrical engineer dealing with the procurement. You could omit dozens of possible details from the final specification and get crucified by the company… Read more
Sep 28, 2020 | Edvard
Electrical insulation testing – Often underestimated until things go really bad
Due to mechanical damage, vibrations, (excessive) heat/cold, moisture/humidity, chemical influences and interactions and aging pinholes, cracks causes moisture and foreign matter to penetrate the surface of the insulation. They create a low resistance path which… Read more
Jun 17, 2020 | Edvard
My experience in the design and installation of medium voltage switchgears
Medium Voltage (MV) switchgear is typically any switchgear over 1000V in the United States (US). Some of the nominal voltage ratings used in the US by power utilities are 2.4-4.16kV, 7.2kV, 13.8kV, 14.4kV, 23kV, 34.5kV…...
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This technical article/guide requires a Premium Membership. Get access to all premium HV/MV/LV technical articles, electrical engineering guides, and papers. Check out each plan's benefits and choose the membership plan that works best for you or your organization.You can choose an annually based Plus, Pro, or Enterprise membership plan.Log InSign Up
May 07, 2020 | Amar M
Twelve doubts in ground testing that make electrical engineers pretty confused
Ground testing is often misunderstood by electrical engineers and technicians who do not perform such testing often and regularly. It seems that there are a lot of questions and doubts on testing the ground. This… Read more
May 06, 2020 | Edvard
The art of transformer maintenance, inspection and repair (recommended practices)
The primary purpose of transformer maintenance is to ensure the internal and external parts of the transformer and accessories are kept in good condition and “fit for purpose” and able to operate safely at all… Read more
Feb 10, 2020 | Edvard
How to avoid common mistakes during wiring and startup of power factor correction (PFC) cubicle
Power factor correction (PFC) and reactive power compensation (RPC) are often used as synonyms in practice. Although they are similar and mutually dependent terms, they don’t represent the same thing. RPC is a procedure for…...
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This technical article/guide requires a Premium Membership. Get access to all premium HV/MV/LV technical articles, electrical engineering guides, and papers. Check out each plan's benefits and choose the membership plan that works best for you or your organization.You can choose an annually based Plus, Pro, or Enterprise membership plan.Log InSign Up
Jan 16, 2020 | Miodrag Kokotovic
12 on-site checks to inspect the transformer’s health
On-site inspection of the substation transformer usually exposes important condition changes and it initiates various suspicions that need to be investigated in detail. As with any other substation equipment, many things could go wrong during… Read more
Nov 11, 2019 | Edvard
13 very important type tests of a low voltage switchgear carried out by the manufacturer
Certification of distribution assemblies is defined by international standard IEC 61439-1. This standard provides common rules that are recognized worldwide. Compliance with the standard is certified, depending on the country or market, by a declaration… Read more
Nov 06, 2019 | Edvard
Lessons I learned during the start-up of an MV switchgear
In the world of electrical engineering, a term start-up assumes all works which are necessary to be done for putting in operation already tested switchgear, as close as possible installed in position and ambient defined…...
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This technical article/guide requires a Premium Membership. Get access to all premium HV/MV/LV technical articles, electrical engineering guides, and papers. Check out each plan's benefits and choose the membership plan that works best for you or your organization.You can choose an annually based Plus, Pro, or Enterprise membership plan.Log InSign Up
Oct 31, 2019 | Miodrag Kokotovic
