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Learn about power engineering and HV/MV/LV substations. Study specialized technical articles, papers, and electrical engineering video courses.

Technical Articles

Distribution Of Energy For Lighting – History

Edison planned his first installation for New York City, and decided that an underground system of distribution would be necessary. This took the form of a network supplied by feeders radiating ftom a centrally located… Read more

Dec 24, 2010 | Lighting

Thomas Edison

Siemens – Busway Purpose and Definition

Commercial and industrial distribution systems use several methods to transport electrical energy. These methods may include heavy conductors run in trays or conduit. Once installed, cable and conduit assemblies are difficult to change. Power may… Read more

Dec 23, 2010 | Energy and Power

Electrical power can be supplied to any area of a building by connecting standard lengths of busway.

Use Of Vacuum As A Breaking Medium

SF6 and vacuum are the two most modern breaking techniques in the fields of Medium Voltage (from 1 to 52 kV) and High Voltage (> 72.5 kV). They appeared in the 1960’s and rapidly developed… Read more

Dec 22, 2010 | High Voltage

Fig-1 Evolution Of MV Circuit Breaker Markets In Europe

Establishing New Power Substation

The construction of new substations and the expansion of existing facilities are common place projects in electric utilities. However, due to the complexity, very few utility employees are familiar with the complete process that allows… Read more

Dec 20, 2010 | Power Substation

Power Switchyard

Characteristics of Lightning Strokes

Lightning, one of Mother Nature’s most spectacular events, started to appear significantly demystified after Franklin showed its electric nature with his famous electrical kite experiment in 1752. Although a great deal of research on lightning… Read more

Dec 19, 2010 | Energy and Power

Characteristics of Lightning Strokes

Basics Of Subtransmission Systems

Subtransmission systems are those circuits that supply distribution substations. Several different subtransmission systems can supply distribution substations. Common subtransmission voltages include 34.5, 69, 115, and 138 kV. Higher voltage subtransmission lines can carry more power… Read more

Dec 17, 2010 | High Voltage

Transmission Lines

Maintenance for UPS systems

Maintenance of the UPS consists of preventive and corrective maintenance. Preventive maintenance consists of a scheduled list of activities. Performing these activities keeps the UPS in good working order and helps to prevent failures. Corrective… Read more

Dec 16, 2010 | Maintenance

Maintenance for UPS systems

Solar Power Tower

Solar power towers generate electric power from sunlight by focusing concentrated solar radiation on a tower mounted heat exchanger (receiver). The system uses hundreds to thousands of sun-tracking mirrors called heliostats to reflect the incident… Read more

Dec 15, 2010 | Solar Power

Keeping Motor Windings Dry

Special provision should be made to protect motor windings which operate in a damp atmosphere or are subject to condensation of moisture when out of service for long periods. Motors located in galleries of dams… Read more

Dec 14, 2010 | Electric Motor

AC motor stator windings

Forms of Separation (2) – Fundamentals

In accordance with the Standard, separation of the various elements of an Assembly: busbars, functional units, terminals, can be claimed providing one or more of the following criteria are met: 1. “Protection against contact with… Read more

Dec 13, 2010 | Low Voltage

Forms Of Separation - Introduction

Shielding Of Power Cables

Medium and high-voltage power cables, in circuits over 2000 volts, usually have a shield layer of copper or aluminum tape or conducting polymer. If an unshielded insulated cable is in contact with earth or a… Read more

Dec 12, 2010 | Cables

Shielding of power cables

Hydro vs. Wind vs. Solar Power?

Matthew Stein, author of When Technology Fails: A Manual for Self-Reliance, Sustainability, and Surviving the Long Emergency wrestles with that very question in his book. Here’s an excerpt: No single RE source works best all… Read more

Dec 11, 2010 | Hydropower

Hydro vs. Wind vs. Solar Power?

Sources Of The Electric Energy – Generation

There are a number of ways to produce electricity, the most common commercial way being the use of a synchronous generator driven by a rotating turbine. The combination is called a turbine-generator. The most common… Read more

Dec 10, 2010 | Energy and Power

Wind Power Turbine Diagram

IEC 62271-200 – HV Switchgear And Controlgear

Part 200: AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV Switchgears are important nodal points in modern power distribution. Correspondingly important is their reliable functioning,… Read more

Dec 09, 2010 | High Voltage

IEC 62271-200

Historical Review of Power System Stability Problems

As electric power systems have evolved over the last century, different forms of instability have emerged as being important during different periods. The methods of analysis and resolution of stability problems were influenced by the… Read more

Dec 08, 2010 | Energy and Power

Historical Review of Power System


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