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Monthly Archive for: «March, 2013»

Wind Energy End-Use Applications

Wind energy markets can be classified based on the end-use application of the technology. Wind energy projects are common for off-grid applications. However, the largest market potential for wind energy projects is with on-grid (or… Read more

Mar 30, 2013 | Edvard

Wind Energy End-Use Applications

Preparing to synchronize a generator to the grid

In order to synchronize a generator to the grid, four conditions must be met: Phase Sequence Voltage Magnitude Frequency Phase Angle The phase sequence (or phase rotation) of the three phases of the generator must… Read more

Mar 27, 2013 | Edvard

Preparing to synchronize a generator to the grid

Induction motor startup and losses calculation

The main objectives while starting an induction motor are: To handle high-starting current To achieve high-starting torque. As we know, rotor resistance determines starting torque. Usually, this rotor resistance is small, giving small starting torque, but… Read more

Mar 25, 2013 | Edvard

Induction motor startup and losses calculation

Hospitality lighting design, Why it matters

The hospitality business involves serving people and giving them enjoyment. From restaurants to hotels, resorts, and even theme parks, facilities are designed with the intent of transporting guests from the world of the ordinary to… Read more

Mar 23, 2013 | Edvard

The functional office lighting realized through 422 luminaires

Lightning Protection System – Germany Regulations

The purpose of a lightning protection system is to protect buildings from direct lightning strikes and possible fire, or from the consequences of the load-independent active lightning current (non-igniting flash of lightning). If national regulations,… Read more

Mar 22, 2013 | Edvard

Lightning Protection System - Germany Regulations

The Rheostat In Few Simple Words

A variable resistor can be made from a wirewound element, rather than a solid strip of material. This is called a rheostat. A rheostat can have either a rotary control or a sliding control. This… Read more

Mar 20, 2013 | Edvard

Startup rheostat of VL10 3 kV DC electric locomotive

Starting Motor With Auto-transformer

An auto-transformer starter makes it possible to start squirrel-cage induction motors with reduced starting current, as the voltage across the motor is reduced during starting. In contrast to the star-delta connection, only three motor leads… Read more

Mar 18, 2013 | Edvard

Starting Motor With Auto-transformer

Torque Of Three-Phase Induction Motor Explained

The rotating force that a motor develops is called torque. Due to the physical laws of inertia, where a body at rest tends to remain at rest, the amount of torque necessary to start a load (starting torque)… Read more

Mar 16, 2013 | Edvard

https://electrical-engineering-portal.com/torque-of-three-phase-induction-motor-explained

Sources and Contributors To Short Circuit Current

Every electrical system confines electric current flow to selected paths by surrounding the conductors with insulators of various types. Short circuit current is the flow of electrical energy that results when the insulation barrier fails… Read more

Mar 15, 2013 | Edvard

Sources and Contributors To Short Circuit Current

What Is The Purpose Of Wind Farm Lighting?

Wind farm lighting includes: Aircraft warning lights that are installed on tops of some turbine nacelles and Night lights around wind farm buildings, parking lots, or other facilities. Aircraft warning lights on top of tall… Read more

Mar 13, 2013 | Edvard

What Is The Purpose Of Wind Farm Lighting?

Working principle of thermal motor protection relay

Thermal motor protection relays contain three bimetal strips together with a trip mechanism in a housing made of insulating material. The bimetal strips are heated by the motor current, causing them to bend and activating… Read more

Mar 09, 2013 | Edvard

Working principle of thermal motor protection relay

An Overview Of Short Circuit Current (part 3)

Fault calculations are carried out to find the magnitude of fault current at various voltage levels of electrical system. One of the key components in the calculation process is to determine the total impedance of the… Read more

Mar 08, 2013 | Asif Eqbal

An Overview Of Short Circuit Current (part 3)

Why Bats Are Insanely Attracted To Wind Turbines?

Recent studies have reported large numbers of bats being killed at wind farms in many parts of North America and Europe. Project monitoring has also discovered significant bat mortality at the Mexico La Venta II wind… Read more

Mar 06, 2013 | Edvard

Why Bats Are Insanely Attracted To Wind Turbines?


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