Electric Motor
Advantages of Variable Speed Motors
Most motors are designed to operate at a constant speed and provide a constant output. While in many cases this may be more than adequate, it is not in all…. Read more
Jun 13, 2012 | By Edvard Csanyi
Transformers
Scott-T Transformer Connection Overview
There are two main reasons for the need to transform from three phases to two phases: to give a supply to an existing two phase system from a three phase… Read more
Jun 12, 2012 | By jiguparmar
Transformers
Star-Delta Transformer Connection Overview
In this type of transformer connection, then primary is connected in star fashion while the secondary is connected in delta fashion as shown in the Figure 1 below. The voltages… Read more
Jun 10, 2012 | By jiguparmar
Smart Grid
Smart Grid Communications Overview
An electricity grid without adequate communications is simply a power “broadcaster.” It is through the addition of two-way communications that the power grid is made “smart.” Smart grid communications enables… Read more
Jun 09, 2012 | By Edvard Csanyi
Hydropower
Lester Allan Pelton – The father of hydroelectric power
Pelton was born in Vermilion, Ohio, in 1829. At age 20 he set out by foot to cross the plains and strike it rich. The first fourteen years he spent… Read more
Jun 08, 2012 | By Edvard Csanyi
Energy and Power
MCB – Miniature Circuit Breaker Construction
The miniature circuit breaker (MCB) plays an important role in providing overcurrent protection and a disconnect means in electrical networks. Recent advancements in circuit breaker technology has increased breaker performance and protection…. Read more
Jun 07, 2012 | By Edvard Csanyi
Electrical Lectures
Fundamental Characteristics of Circuit Breaker
The fundamental characteristics of a circuit breaker are: Its rated voltage Ue Its rated current In Its tripping current level adjustment ranges for overload protection (Ir or Irth) and for short… Read more
Jun 05, 2012 | By Edvard Csanyi
Energy and Power
Understanding Vector Group of Transformer (2)
Continued from first part Understanding Vector Group of Transformer (part 1) Vector Groups are the IEC method of categorizing the primary and secondary winding configurations of 3-phase transformers. Windings can… Read more
Jun 04, 2012 | By jiguparmar
Energy and Power
Understanding Vector Group of Transformer (Part 1)
Three phase transformer consists of three sets of primary windings, one for each phase, and three sets of secondary windings wound on the same iron core. Separate single-phase transformers can… Read more
Jun 03, 2012 | By jiguparmar
