Monday, September 5, 2011

Buy Control and Automation of Electrical Power Distribution Systems (Power Engineering) for $128.96

Control and Automation of Electrical Power Distribution Systems (Power Engineering)

Control and Automation of Electrical Power Distribution Systems (Power Engineering)

| Read more Review. Implementing the automation of electric distribution networks, from simple remote control to the application of software-based decision tools, requires many considerations, such as assessing costs, selecting the control infrastructure type and automation level, deciding on the ambition level, and justifying the solution through a business case. Control and Automation of Electric Power Distribution Systems addresses all of these issues to aid you in resolving automation problems and improving the management of your distribution network.

Bringing together automation concepts as they apply to utility distribution systems, this volume presents the theoretical and practical details of a control and automation solution for the entire distribution system of substations and feeders. The fundamentals of this solution include depth of control, boundaries of control responsibility, stages of automation, automation intensity levels, and automated device preparedness. To meet specific performance goals, the authors discuss distribution planning, performance calculations, and protection to facilitate the selection of the primary device, associated secondary control, and fault indicators. The book also provides two case studies that illustrate the business case for distribution automation (DA) and methods for calculating benefits, including the assessment of crew time savings.

As utilities strive for better economies, DA, along with other tools described in this volume, help to achieve improved management of the distribution network. Using Control and Automation of Electric Power Distribution Systems, you can embark on the automation solution best suited for your needs.
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Sunday, September 4, 2011

Discount Building heat load contributions from medium and low voltage switchgear--part I: solid rectangular bus bar heat losses.(Report): An article from: ASHRAE Transactions

Building heat load contributions from medium and low voltage switchgear--part I: solid rectangular bus bar heat losses.(Report): An article from: ASHRAE Transactions

Building heat load contributions from medium and low voltage switchgear--part I: solid rectangular bus bar heat losses.(Report): An article from: ASHRAE Transactions

| Read more Review. This digital document is an article from ASHRAE Transactions, published by American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. on July 1, 2009. The length of the article is 7435 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.

From the author: Heat dissipated by medium and low voltage switchgear is determined by use of a spreadsheet model. In the first part of this paper, mathematical models of a switchgear component that produces a significant portion of the total heat loss is examined. Rectangular bus bars are used in switchgear for carrying large current loads and the loss contribution of this one component is significant. The heat loss mechanisms of bus bars consist of eddy current loss, loss from proximity effect, and stray or enclosure loss. Each of these losses is considered in turn to develop a complete model of the bus bar loss process. Where possible, portions of the loss model are compared to information developed elsewhere with excellent agreement. The eddy current and proximity effect loss models are developed in such a way that the model allows evaluation with a spreadsheet. The same can be said for the stray or enclosure loss model. The goal of this work is to produce a switchgear power loss model suitable for use by HVAC engineers for heat load prediction.

Citation Details
Title: Building heat load contributions from medium and low voltage switchgear--part I: solid rectangular bus bar heat losses.(Report)
Author: Warren N. White
Publication:ASHRAE Transactions (Magazine/Journal)
Date: July 1, 2009
Publisher: American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc.
Volume: 115 Issue: 2 Page: 369(13)

Article Type: Report

Distributed by Gale, a part of Cengage Learning
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Saturday, September 3, 2011

Cheap Solar Photovoltaic Operation and Maintenance for Residential, Commercial and Utility Systems for $13.47

Solar Photovoltaic Operation and Maintenance for Residential, Commercial and Utility Systems

Solar Photovoltaic Operation and Maintenance for Residential, Commercial and Utility Systems

| Read more Review. This book details how to operate and maintain residential, commercial and utility solar photovoltaic systems that are connected to the utility grid. By following the guidelines in this book you will be able to operate and maintain solar power systems that should give many years of reliable operation. Invaluable trouble shooting advice will aid in returning your system to full operation in the event of a problem.
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