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Category 'Premium Content' - Technical Articles

Technical articles in the “Premium Contents” category are fully accessible to Premium Members only. Electrical engineering guides, specialist technical articles, and papers authored by experienced electrical engineers are all available to premium users. As an electrical engineer working in the Low-, Medium-, or High-Voltage fields, it will help you develop the professional technical skills you’ll need on the job.

Energy and Power

A real-life case study of relay coordination (step by step tutorial with analysis)

I would say that coordination is a TEAMWORK. In the protection context, it implies how the various protection devices in an electrical distribution network, work as a team, to achieve the common objective of power supply continuity, even in the…...

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Jun 15, 2020 | By

A real-life case study of relay coordination
Maintenance

My worst experience in the maintenance and supervision of medium voltage substations

While there are various voltage levels applicable across the globe depending upon the usability, the category of Medium Voltage remains one of the most critical voltage group comprising primary distribution or sub-transmission category of power supply at the range of…...

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Jun 01, 2020 | By

My worst experience in the maintenance and supervision of medium voltage substations
Medium Voltage

The most common issues I experienced in wiring of a medium voltage switchgear

Nowadays, the design and manufacturing of a Medium Voltage switchgear is not an easy task. Many factors could affect the generation of an optimal set of engineering drawings to be easily followed by the wiring people in the shop. One…...

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May 18, 2020 | By

The most common issues I experienced in wiring of a medium voltage switchgear
Medium Voltage

My experience in the design and installation of medium voltage switchgear

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 and so on. The design…...

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May 07, 2020 | By

My experience and issues during the design and installation of medium voltage switchgear
Cables

The essential HV/EHV substation auxiliary facilities you should know about

Nowadays, HV/EHV substations have become pretty complex from the design point of view. Besides the main electrical equipment, which must be designed and selected correctly, there are several auxiliary facilities without which a substation would not be able to operate…...

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Apr 27, 2020 | By

The essential HV/EHV substation auxiliary facilities you should know about
Premium Content

Practical tips for the protection of generators and power transformers

There are usually several ways of protecting HV/MV generators and transformers. It should be noted that one protection relay is often used for several functions, for example, an overcurrent relay can be used for both overcurrent and earth fault protection…....

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Apr 17, 2020 | By

Practical tips for the protection of generators and power transformers
Medium Voltage

Switching devices you are likely to spot in every medium voltage switchgear

Up to and including 52 kV voltage range is generally referred to as “medium voltage”. This technical article shed some light on a few devices you are likely to spot in most of the medium voltage switchgear. But, before diving…...

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Apr 13, 2020 | By

Switching devices you are likely to spot in every medium voltage switchgear
Medium Voltage

Mastering single line and wiring diagrams: Using circuit breaker for MV power factor correction

Within this article, a custom-made cubicle intended for supply and protection of MV reactive power compensation block will be analyzed. Technical characteristics of major electrical components, together with three line and wiring diagrams, will be shown, while some specific aspects…...

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Apr 09, 2020 | By

Mastering single line and wiring diagrams: Using circuit breaker for MV power factor correction
Medium Voltage

Mastering single line and wiring diagrams: MV earth fault protection

This technical article continues the series of articles dedicated to mastering single line and wiring diagrams of medium voltage switchgear. This time, the subject is the principle, and realization of earth fault protection applied to the same example switchgear used…...

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Mar 26, 2020 | By

Mastering single line and wiring diagrams: MV earth fault protection
Energy and Power

AC and DC facilities in electrical station services of major power plant types

In a power plant, the electrical station services (abbreviated to SS in the following) consist of all the DC facilities from 24 to 220 V and AC facilities up to about 20 kV for controlling and supplying power to the…...

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Mar 23, 2020 | By

AC and DC facilities in electrical station services of major power plant types
Medium Voltage

Learn how to interpret interlocking schemes between MV cubicles (single line and wiring diagrams)

There are numerous variations of MV switchgear topology, measurement, and control logic. However, there are also some basic rules related to these aspects which may be frequently seen in practice, with the purpose of increased safety and reliability during operation…....

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Mar 12, 2020 | By

Mastering single line and wiring diagrams: Interlocking between MV cubicles
Power Substation

An overview of transformer connections and diagrams in the electric power system

Power transformers are used extensively by traditional electric utility companies, power plants, and industrial plants. This technical article summarizes the basic types, connections, and diagrams of transformers needed for analyzing the electrical transmission and distribution systems. Analyzing electric power systems,…...

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Mar 05, 2020 | By

Analysing power transformers in electric power systems
Energy and Power

When can we say that earthing arrangement is safe for people (confusions in practice)

This article will analyse some of the most important safety issues related to design and use of LV electrical installations. Besides explanation of relevant terms in this field defined by IEC standards, some misinterpretations and confusions which may be seen…...

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Feb 28, 2020 | By

When can we say that earthing arrangement is safe for people (confusions in practice)
Energy and Power

Design and control considerations for an example of the waste water pumping station

Wastewater pumping stations are very common application examples of three-phase induction motors. There are numerous varieties of power supply and control logic, depending on exact conditions in the place of installation, the role of the pumping station inside a sewer…...

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Feb 14, 2020 | By

Design and control considerations for an example of the waste water pumping station
Low Voltage

Lessons I learned during installation and wiring of LV switchboard

Let’s start with some basic definitions from the United States National Electrical Code (NEC). Low voltage switchboard is generally defined as a large single panel, frame, or assembly of panels on which are mounted on the face, back, or both,…...

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Feb 05, 2020 | By

Lessons I learned during installation and wiring of LV switchboard


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