The Switching Surge and Arresters
 This month's ArresterFacts on Switching Surge and Arresters did not come as easy to me as they usually do. It took more effort than normal to offer something useful and understandable on this subject. But I am pleased with the results. In this ArresterFacts, you will find a tool that's a quick and easy way to determine if your new Shunt Bank is a threat to the arresters on your system. In the past when I was asked if a bigger arrester was needed when a shunt bank was being considered, I suggested that a study be completed to make a determination. Now an easy and quick determination can be made using graphic tool included in this ArresterFacts Issue. Take a look and pass along.
Download here in pdf (1meg)
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Patent Fast Take
This invention is an altogether unique application of an arrester for purposes other than lightning protection. The inherent capacitance of Metal Oxide Varistor is adequate for the coupling of a low voltage signal to a high voltage power line. This application is possible because the signal being coupled is above 1 MHz as opposed to normal power line carrier frequencies in the kHz range. This device is part of the Broadband over Power Line (BPL) industry that is growing in the use as a way to bring internet services to customers by ways other than cable or satellite.
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Cooper Introduces
The Evolution Arrester
Cooper Power Systems has introdced the Next Generation Arrester. Virtually Zero Losses. Per the Brochure, for a Utility with a million installed arresters, converting to this arrester instead of their current model would save 4,380,000 kWh of energy annually. This represents 3,271 metric tons of CO2 emmisions.
The Evolution Arrester as shown has Cooper's new CooperGuard wildlife protector which is an option for this and all Cooper arresters. This new protector makes an outage caused by animals nearly impossible.
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