This article was posted 02/19/2010 and is most likely outdated.

Ronk Blocker
 

 

Topic - Stray Voltage
Subject -Ronk Blocker

February 19, 2010
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Ronk Blocker®

Image1Agricultural specialists have known for some time that low non-lethal voltages accessed to dairy animals can cause mastitis, affect animal behavior and materially reduce milk production. More recently, the same voltages have been known to cause problems in swine parlors, poultry houses, water fountains, swimming pools and homes.

Various studies have shown that voltages about 0.5 volts can be detected by animals that are very wet as is a dairy cow being washed down prior to milking. There is some evidence that humans are susceptible to a threshold voltage of approximately 1 volt when they are wet. Thus voltage below 10 volts, which previously the electrical industry has largely ignored as a non-problem, now, has a much greater interest and appreciation.

Since these low voltages may now have many sources, they have been variously called “tingle voltage”, extraneous voltage, or more generically called Stray Voltage. A number of studies and findings have identified methodical and logical methods for identifying the sources of the problems and eliminating them.

Stray voltages can come from many sources, both on and off the site. In most cases, the problems are the result of several sources simultaneous combined. On-site stray voltage can usually be resolved through a program of upgrading and reconnecting the wiring system and its various loads. Off-site stray voltage, which is of particular interest to the power supplier, can result from primary neutral currents, off-site faults, marginal groundings, etc.

Ronk Electrical Industries Inc. has developed the BLOCKER, which is a device designed to reduce the off-site contribution to the stray voltage problem. This simplifies the solution since any remaining problems have to be on-site in nature and can be handled and resolved accordingly.

Click on the image or the following link: The Role of the Ronk BLOCKER®

For additional Information call Ronk Electrical Industries at 1-800-221-7665 or visit their website http://www.ronkelectrical.com/blocker.html.

 

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Comments
  • good article need information like this, last year first time recorded where by a young boy was kill by 7 volts identified as stay voltage. . like atricle stated we have not address any issue of less then 10 volt before. Now a dealth of only 7 volts be interested what the NEC going to do about it in 2011 keep up the good work Mike.

    John Hall
  • Reply from: DONALD W. ZIPSE, P.E.   
    Reply to John Hall – Since when does voltage kill? Reply to Watt – There are three devices known as “Neutral Blockers” of which Ronk is one. Reply to McCES – The secondary is solidly grounded and in the 10 years that I have been involved in saving the dairy farmer no one has been hurt from any installation of neutral blockers. The other way to partially stop the flow of stray current is to use a transformer that does not have the primary neutral connected to the secondary neutral. In my opinion 99 and 44/100 of the electrical engineers in the world would never consider connecting the primary neutral to the secondary neutral. Only in North America is such a stupid electrical connection made and only within the utility industry.

    This unconventional electrical connection came about in 1932 in the city of Chicago with the help of Purdue University. Do a search of AIEE technical papers to get the full details.

    Reply from: Wyatt   
    Very interesting....I'd like to hear more about connecting the P & S neutrals together; i.e., why it's done and how the utilities got started doing this, Thanks wyatt505@aol.com


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