Inside Variable Frequency Drive (VFD) Panel: Configuration, Schematics and Troubleshooting
Proper analysis of the VFD’s power and control circuit diagrams is essential for successful troubleshooting. But before starting any analysis, you must know how your system connected through VFD works and how it breathes. You must also know all components…...
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Jul 25, 2022 | By Mohammed Ayman
Secrets and warnings in operation and maintenance of a Gas Insulated Substation (GIS)
After its inception in the mid-1960s, GIS technology has become a remarkable success over a wide range of high voltage applications up to 800 kV. Reliable operation and compact size have been its main advantages over its conventional air-insulated counterparts…....
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Jul 11, 2022 | By Bishal Lamichhane
What will happen to digital substations once the internet drops dead for good?
Here at EEP, we have already covered multiple aspects of digital substations, ranging from design, upgradations, and whatnot. We may continue writing till eternity and still be left playing catchups with the latest addition to advancements in power systems design…...
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Jun 27, 2022 | By Bishal Lamichhane
Electrical engineering for hydropower, from run-of-river to pumped storage plants
Nowadays, when we all see and feel the colossal crisis looming on the horizon, the question of energy security is among the first things on the table in each country’s management. It’s now essential more than ever for each country…...
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Jun 13, 2022 | By Marco Bruschini
Should we be concerned about the cybersecurity of modern digital substations?
Swift communication and interoperability are two primary aspects of modern digital substations that make them stand out in the protection and monitoring front. Apparently, the same features sometimes make them vulnerable to external cyber threats if left unprotected. While there…...
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May 30, 2022 | By Bishal Lamichhane
Main and auxiliary circuit diagrams of switching pole-changing three-phase motors
This technical article is dedicated to the main and auxiliary circuit diagrams of switching three-phase motors. We’ll now discuss a little more complicated schematics than the previous article. We’ll cover seven schematics of switching pole-changing three-phase induction motors with one…...
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May 23, 2022 | By Edvard Csanyi
Hints for a good design of an optical communication system for a transmission line network
Communication networks are an integral part of interconnected transmission lines in a power grid, analogous to the spinal cord for control signal and information exchange among substations, data hubs, and load dispatch centers. This article covers the major trend and…...
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May 09, 2022 | By Bishal Lamichhane
The most common type tests required for medium and high voltage switchgear
Let me put the definition of switchgear type tests this way. A switchgear MUST withstand voltage in normal and abnormal conditions and to carry varying load currents during its lifetime. A switchgear MUST be able to clear faults occurring due…...
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May 02, 2022 | By Edvard Csanyi
The essentials of standby power systems you SHOULD install before the blackout happens
The cost of a standby power system for a business can be pretty high, so it’s essential to weigh all of your options before committing to a piece of equipment. The direct and indirect costs must be clearly and unequivocally…...
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Apr 25, 2022 | By Edvard Csanyi
Influence of imminent future techs in power substations (trends, IoT design, cyber security)
Advancement in technology is not something unheard of and metaphorically, it has this unique tendency of replicating the pattern of biological evolution. The design and operation of power substations follow similar footsteps, with drastic changes in technology over the last…...
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Apr 18, 2022 | By Bishal Lamichhane
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
12 essential parameters required for rating large generators
When specifying generators, the first thing that comes to mind is a rating. The machine’s rating is a set of parameters that, simply speaking in engineering terms, describe the generator. These values indicate the generator’s available power output as well…...
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Mar 28, 2022 | By Edvard Csanyi
Where to start with the design of 132/33 kV substation switchgear and protection systems
The step-down substations make up for more than 80% of total grid substations and are the focal point of sub-transmission and distribution systems. Usually, HV substations within the power transmission grid are assigned with the dual function of switching and…...
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Mar 21, 2022 | By Bishal Lamichhane
Medium voltage switchgear: Important design considerations and applications
This technical article explains various aspects of the application of medium voltage switchgear and highlights the considerations for the selection of suitable circuit breakers for different applications. Medium voltage switchgear, commonly known as MV switchgear, play a significant role in…...
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Mar 14, 2022 | By Edvard Csanyi
Learn what is inside a modern ATS panel and how to analyze the circuit diagrams
One of the ways to mitigate a successive transfer of power in case of loss of supply, power outage, or scheduled maintenance is the use of a transfer switch. The transfer switch is an electrical device that transfers power from…...
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Mar 07, 2022 | By Chidubem Asogwa

