Conservation Voltage Criteria

January 26th, 2016 | Make a comment | Posted in Electrical distribution
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Here’s an article by one of the member of our community. Just know that you too can write an article about whatever you want (eletrical topic but not electronics, debate, review, personal experience, showing your work, etc.).

If you’re interested, send it by mail.

Energy efficiency and conservation are the main endeavours of engineers, system planners as well as consumers. The shareholders are always on the quest for optimised energy transmission, distribution and usage. However, one of the hurdles is the need to change the existing equipment to accommodate the changes, as it tends to be costly, especially for large installations.

One of the easiest and least invasive ways to achieve the demand response while pursuing energy efficiency is through conservation voltage reduction (CVR).

Working Principle of conservation voltage reduction

Power supply companies must ensure that the last consumer in the service line receives power at the stated voltage. However, this tends to be difficult considering the line drop, especially for long feeder lines. The supply must thus be higher than the standard level to compensate for the losses.
A downside of this is that the first consumers on the line will thus receive higher voltages than required. CVR serves to ensure that the standard rate is delivered to all the consumers, regardless of the proximity to the source.

Conservation Voltage Criteria
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Electrical engineers : be a fundamentalist!

January 19th, 2016 | 1 Comment | Posted in Others
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electrical-engineer-testimony Muhammad A. is a senior engineer from Pakistan. Last week, he sent us an article in which he gives us a tip: be a fundamentalist!

Read his wise advices below and leave your impressions

Are you not a Fundamentalist?

This is a site about electrical engineering. And you the respected readers, almost certainly, are an engineer. You must be wondering why I am preaching fundamentalism here. Do not be scared, I am not using the word in the contemporary sense. Nor am I using it in its ancient sense. Rather, I am using it in the literal sense of the word.

I am almost certain that you are also a fundamentalist. Read the rest of this entry »

Common pitfalls in distribution engineering and design and prevention

January 15th, 2016 | Make a comment | Posted in Electrical distribution
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electrical engineeringHi, it’s Steven Mill! For my first article for 2016, I chose to deal with common pitfalls in distribution engineering and design and prevention. I think many of us can relate, so here’s my rendition…

Thanks in advance for reading. Don’t forget you can send articles too by sending a mail to the moderator team.

In most distribution systems, the service-level equipment is designed to serve between one and ten customers. This leads to a high chance of non-coincident loads characterized by numerous square peaks, low loads, and lower losses.

Other common pitfalls that plague engineers are the generalization of service level layout design, economic hurdles, and environmental restrictions.
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Experiences in Electrical Power Installations (career story)

January 13th, 2016 | 1 Comment | Posted in Others
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Hi everybody! We’re glad to publish this career story by one of the members of the community, Amos N. Here’s what he’s got to tell after 20 years experience on Electrical installations, maintenance and repairs…

“Electrical engineering professionals have various options when it comes to employment. There are numerous opportunities either as a contractor, consultant, employed either as an electrical installer or maintenance engineer in an industrial setup. Most companies employ electrical or mechanical engineers to head their technical departments. Here, they are required to oversee installation, maintenance and repair of most of the equipment.

Throughout my career in the electrical engineering, I have worked in various capacities, in the industry, as an installer and as an independent contractor. All these jobs have their advantages as well as challenges. When professionals follow good practices and standards, most things will work out well as specified by the manufactures and as expected. However, there are instances where some people use short-cuts and do substandard jobs such as using substandard, unreliable parts, loose connections, incorrect wiring, etc.

Effects of installing a breaker

Figure 1: Effects of installing a breaker which fitted the panel physically but was not approved by the manufacturer to be installed in that panel. Image: merchantcircle


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Electrical distribution system aging and degradation

January 8th, 2016 | Make a comment | Posted in Electrical distribution
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electrical engineeringFor his 1st article of 2016 for the blog, one of our most loyal members, Marvin M. wanted to tell us about electrical distribution system aging.

Check what he has to teach below and don’t mind if you want to discuss it!

“Designing and installing electrical transmission and distribution systems is a resource-intensive undertaking. Most companies only replace near faulty components during the maintenance or complete failure instances. This mean that most regions are served by aging systems, with the inevitable result of frequent failures, power supply disruptions, and accidents.”

“However, with the need for power supply reliability, an increased privatization of power generation and supply companies and heightened customer expectations, there is a need to implement system evaluation policies and aging models.”
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