Clik here to view.
Why remote racking of LV/MV circuit breakers is a smart investment but so...
Circuit breaker racking is one of the most prominent exercises in the power system that exposes an operator to risk. A sudden malfunction during the racking process can induce catastrophic... Read...
View ArticleClik here to view.
The facts about switchyards, incoming and outgoing feeder connections, CTs...
What do you need to know about designing a switchyard? Well, to simplify, you need a lot and it’s not that simple. Switchyards need to be designed with respect to... Read more The post The facts about...
View ArticleClik here to view.
Guide to erection and commissioning of MV/HV switchgears (Inspection,...
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... Read more The...
View ArticleClik here to view.
Testing and commissioning of MV/HV switchgears (wiring, final inspection and...
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...
View ArticleClik here to view.
Mastering Motor Control Center (MCC): Wiring diagrams and equipment from zero...
Motor control center (MCC) was introduced back in 1937 to place different motor starters in one cabinet to save space. It is a modular cabinet that supplies and controls motors,... Read more The post...
View ArticleClik here to view.
Ohmic relay applications for protecting power system, lines and generators
This class of relays was originally used to protect transmission lines and were believed to measure the distance from the relay location to a fault. Currently, several types are applied... Read more...
View ArticleClik here to view.
Improving the cybersecurity of substations using intrusion detection
Multiple layers are necessary to ensure the cybersecurity of substations. Cryptography allows authentication of devices, but not all attacks can be prevented with these measures. Firewalls and “air...
View ArticleClik here to view.
My experience in drafting the layout & arrangement drawing of 33/11 kV...
Medium voltage substations fall within the sub-transmission power system category, which feeds the bulk consumers directly or facilitates the secondary and tertiary distribution to small industrial...
View ArticleClik here to view.
The most used types of single-phase motors in the world
You should know that single-phase motors are rarely rated above 5 kW. Fractional-kilowatt motors, most of which are single-phase, account for 80−90% of the total number of motors manufactured and......
View ArticleClik here to view.
Your Black Friday in EEP (30% + 20% Discount)
Hello, hope all is well with you! It’s our pleasure to share with you two Black Friday offers for our new electrical engineers, valid till December 3rd: 20% on EEP... Read more The post Your Black...
View ArticleClik here to view.
Mastering switchgear control circuits – AC/DC circuits and circuit breaker...
Control circuits are vital to the operation of medium voltage switchgear. The integrity of these control circuits is essential to the switchgear’s proper operation, so commissioning and maintenance...
View ArticleClik here to view.
Exciting and inrush currents in transformers that often make protection...
If normal voltage is impressed across the primary terminals of a transformer with its secondary open-circuited, a small exciting current flows. This exciting current consists of two components, the...
View ArticleClik here to view.
Mastering switchgear control circuits: trip, BCPU and alarm, indication, and...
In the last article, an introductory part of the switchgear control circuits, including DC/AC circuit and breaker closing circuit, was discussed thoroughly. This article continues the discussion with...
View ArticleClik here to view.
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:... Read more...
View ArticleClik here to view.
The facts about numerical relays that every electrical engineer should know
The first protection devices based on microprocessors were employed in 1985. The widespread acceptance of numerical technology by the customer and the experiences of the user helped in developing...
View ArticleClik here to view.
Ten most dangerous mistakes in the operation of low voltage switchgear (you...
The Association of Steam and Electric Apparatus Owners (APAVE) generally classifies low-voltage equipment as any equipment that requires a rating of ≤ 1000 volts to operate. With a majority of... Read...
View ArticleClik here to view.
Hey engineers, wish you a happy and normal new year, 2021!
Just a short note from me today, the end of this crazy year. I’d like to wish you a normal and happy New Year on behalf of myself and everyone... Read more The post Hey engineers, wish you a happy and...
View ArticleClik here to view.
Four ways of ensuring proper selectivity in MV/HV electrical network protection
Selectivity study of a power system is usually considered as an advanced job for advanced engineers, mostly relay protection engineers. This article will try to get close to a few important...
View ArticleClik here to view.
Mastering GIS control circuits: AC/DC auxiliary circuits and circuit breaker...
A gas-insulated substation (GIS) is usually utilized in high voltage applications in which all conductive parts are encapsulated in sealed cylinders with SF6 as the insulating medium. The...
View ArticleClik here to view.
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...
View Article