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Category Archive for: «Energy and Power»

Voltage Drop Calculations For Engineers – Beginners

Voltage drop calculations using the DC-resistance formula are not always accurate for AC circuits, especially for those with a less-than-unity power factor or for those that use conductors larger than 2 AWG. Table… Read more

Sep 19, 2015 | Electrical Lectures

Voltage Drop Calculations For Engineers - Beginners

Guidelines To Residential Room Lighting

Architects of development houses usually select the locations for switches, receptacles, and luminaires at a quality and price level determined by the builder. However, purchasers of architect-designed, custom-built homes usually have an… Read more

Sep 18, 2015 | Energy and Power

Guidelines To Residential Room Lighting

4 Factors To Consider When Selecting a Sectionalizer

Sectionalizers are (beside overcurrent relays, reclosers and fuses) one of the most used for distribution system protection. A sectionalizer is a device that automatically isolates faulted sections of a distribution circuit once… Read more

Sep 16, 2015 | Energy and Power

Sectionalisers as one of the most used for distribution system protection

5 Steps To Safely Shutdown a Large Generator

Normally, units are removed from service through operator initiation of distributed control system (DCS) commands or turbine trip buttons that shutdown the prime mover. Closure of steam or fuel valves will then… Read more

Sep 11, 2015 | Energy and Power

5 Steps To Safely Shutdown a Large Generator

The Basics of Electrical Bus Protections

When we examine electrical protection schemes, the best place to start is with electrical bus protections, as they are the easiest to protect. They utilize the fundamental concept of the overcurrent relay (Figure 1). An overcurrent… Read more

Sep 05, 2015 | Energy and Power

The Basics of Electrical Bus Protections (Overcurrent, Differential and Undervoltage)

Electrical Design Project Of a Small Bakery

A small bakery with just a counter and storage areas is simple to design. The electrical design follows the layout for a house, but care must be taken on loading factors if direct-acting electric… Read more

Aug 26, 2015 | Cables

Electrical Design Project Of a Small Bakery