By Isabelle Heriakian / Published on Mon, 2009-12-07 15:48
Prior to designing a power supply system for a building or other structure, a designer shall carry out a detailed analysis concerning the requirements for reliability of power supply of loads to be installed in the designed building or facility.
This chapter of the Guide for Design Engineers develops a step by step methodology to size the source power.
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By Isabelle Heriakian / Published on Mon, 2009-11-23 16:06
by Dr S. Hardie and Assoc. Prof. Neville Watson
The high returns to dairy farmers has resulted in many sheep and crop farmers converting to dairy farming. In order to maintain adequate grass growth for the cows, a large existing and increasing density of farm irrigation deep well pumps are extensively used during the summer. High levels of harmonic voltages and Total Harmonic Distortion (THD) are being experienced due to this equipment, and in some cases, is having adverse consequences.
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By Isabelle Heriakian / Published on Mon, 2009-11-23 15:48
by V.J. Gosbell.
There will be an increased need to deal with disturbing loads and uncertainties due to distributed generator connections in future networks. This paper in particular reviews AS/NZS 61000.3.6 and its application to distribution systems to see if the harmonic limits can be increased and if the stage 2 allocation procedure can be improved. It is shown that the major harmonic impact on equipment is related to Weighted Total Harmonic Distortion (WTHD).
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By Isabelle Heriakian / Published on Mon, 2009-11-23 14:57
by Prof. Dr. Carlo Alberto Nucci
This paper provides a key-note summary of developments in the management of power quality, with a focus on recent and future outputs in Cigré Study Committee C4. Aspects addressed are:
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By Isabelle Heriakian / Published on Mon, 2009-11-23 14:11
Power quality in future electrical networks.
This conference, unique in the Oceania region, was a premiere hosted by the EPE Centre.
The presentations were focused on defining the challenges facing the power quality of future energy systems.
Below, you will find the papers and presentations of the conference, and you can also refer to the comprehensive report of the workshop.
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By Isabelle Heriakian / Published on Fri, 2009-11-06 01:00
To achieve system availabilities of the order of the six “9”s and beyond, IT and Telecom service providers are totally dependent upon a continuous power supply. Power variations or interruptions create significant disruptions for sectors that are judged by the reliability of their services.
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By Isabelle Heriakian / Published on Tue, 2009-11-03 15:06
IT and Telecom companies suffer unnecessary financial costs caused by electrical power systems that often cannot cope with a variable electric power supply and increasingly demanding power requirements.
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By Isabelle Heriakian / Published on Tue, 2009-11-03 15:04
ECI’s PQ Survey demonstrates that the majority of the PQ problems faced by IT and Telecom service providers could be avoided by better designed electrical installations. The solutions therefore lie very much in the sector’s own hands. Both electrical design engineers and their management were involved in this survey. They recommend a holistic approach to review all the issues at hand, based on three operational pillars:
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By Isabelle Heriakian / Published on Tue, 2009-11-03 15:01
Due to its sheer size and geographical coverage, a telephone company incorporates vast amounts of data exchanges dependent on electrical systems. A large telephone company calculated that its systems’ inability to cope with power surges or dips costs around €24 million per year for this type of event. Power variation issues are more likely to affect the remote and generally older local exchange facilities. These, as well as being less resilient, also cost more to service than more accessible units.
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By Isabelle Heriakian / Published on Tue, 2009-11-03 14:56
A service interruption immediately generates substantial costs, particularly when service level agreements are involved. A power interruption not only has financial consequences in terms of equipment, maintenance, and personnel required to fix the problem. It also has an impact in terms of revenues, contractual agreements and customer satisfaction. The consequences of power interruptions or variations include:
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By Isabelle Heriakian / Published on Tue, 2009-11-03 13:54
Pharmaceutical companies experience unnecessary financial losses caused by electrical power systems that often cannot cope with a variable electric power supply and increasingly demanding power requirements.
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By Isabelle Heriakian / Published on Tue, 2009-11-03 13:48
ECI’s PQ Survey demonstrates that the majority of the PQ problems faced by the pharmaceuticals sector could be avoided by better designed electrical installations. The solutions therefore lie very much in the sector’s own hands. Electrical design engineers involved in this survey recommend a holistic approach to review all the issues at hand, based on three operational pillars:
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By Isabelle Heriakian / Published on Tue, 2009-11-03 13:42
An extended power interruption in another pharmaceutical production site employing close to 400 people was responsible for a total expense of over €8 million. This amount represents some 3% of the company’s annual turnover. The loss comprised staff downtime, lost sales revenues, raw materials wastage, equipment damage, utility and other penalties, as well as additional maintenance and labour required to make up for the lost production.
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