Systems

 

 

Integrated electrical and low-voltage systems of all types—inside and outside a building—encompass the range of work that electrical contractors do. The articles in this section highlight different types of work, from security, fire and life safety, to traditional electrical power and distribution, to lighting, cabling and more. 

United States’ military strategists have talked about the threat of an electromagnetic pulse (EMP) strike since the Cold War in the 1950s, 1960s and 1970s.

A local microgrid in Sendai, Japan

One of the byproducts of the surge in renewable power and smart technology has been the expansion of microgrids. According to recent reports, the systems are expanding nationwide.

Aquila in position prior to takeoff. (From left: Kathryn Cook, technical program manager for Aquila; Yael Maguire, head of Connectivity Lab; Mark Zuckerberg, Facebook founder and CEO; Jay Parikh, global head of engineering and infrastructure)

On June 28th, Facebook launched Aquila, a high-altitude, unmanned solar-powered airplane, for its first flight at Yuma Proving Ground in Yuma, Ariz. Although the team has been running tests and practice flights for months, until this point, only a 1/5th scale airplane had been tested.

Once a technician has spliced a fiber optic cable, he or she must test the splice to verify it is strong and has low loss. The technician must add the test data to the documentation for future reference and present it to the cable plant owner to verify the installation has been done correctly.


More on Systems

 
The Code Is A Tool

We all use tools and test equipment to perform our daily work. Sometimes, it’s a basic hand tool, such as a screwdriver. Sometimes, it’s more sophisticated.


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How Secure Is Your Security?

Are your low-voltage and security customers concerned over “hanging” security cameras on the enterprise network and opening it to potential vulnerabilities? Or are they looking at protecting other parts of their commercial facility that may be housing data and other privileged information?


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The Macrocosm Of Microgrids

TechRepublic.com reported in October 2014 that the United States has more electrical grid blackouts than any other developed nation and that, according to the U.S. Department of Energy (DOE), demand for electricity has outpaced transmission rates by 25 percent every year since 1982.



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Ultimate Broadband

For the last several months, I’ve been writing about uses for the dark fiber around the country and the world. Last month, I covered delivering broadband to communities, so the logical topic for this month is fiber to the home (FTTH) for broadband delivery. 



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An Emerging Trend

I see a trend in news headlines reporting the reduction of city budgets and personnel. Fire departments have especially become resource-challenged. However, the city officials still urge the fire department management to do more with less.


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Figure 1: Distorted current waveforms from six-pulse converters
Imperfect Harmony

The basic principles of harmonics have been the same since 1822, when Joseph Fourier first proposed that some functions could be composed of an infinite sum of harmonics.


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Creating A Commodity

Selecting an Internet protocol (IP) camera can be mind-boggling. Do you need 4K, one of the highest resolutions available? What about storage? Does the camera save with the super-efficient H.264 compression algorithm, or can you store on SD memory cards?



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