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S SRINIVASAN
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Join Date: Jan 2010
Posts: 25
Good Answers: 1

Surge Arrestors

01/03/2017 9:09 PM

How to go about selection of Surge arrestors in EHT systems like 110KV system.
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lyn
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Join Date: Oct 2008
Posts: 42355
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#1

Re: Surge Arrestors

01/03/2017 9:15 PM

I'd contact an expert.

Surge Arrester Buyer´s Guide Edition4.indd - ABB
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RAMConsult
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Engineering Fields - Power Engineering - New Member

Join Date: May 2007
Location: NYC metropolitan area.
Posts: 3230
Good Answers: 444
#2

Re: Surge Arrestors

01/03/2017 10:30 PM

You hire someone who knows how to perform an Insulation Coordination Study. This is not a trivial exercise since an error or omission anywhere in your data will place your entire system at risk.

The output of the study will include such things as the BIL (Basic Impulse/Insulation Level) of each component, the Switching Surge Withstand, the Full Wave Withstand, and the Chopped Wave Withstand, the Switching Surge Protective Level, Impulse Protective Level, Front-of-Wave Level, along with arrestor ratings including Voltage Class, MCOV (Maximum Continuous Operating Voltage), TOV (Temporary Over Voltage), and will consider the type of system grounding, soil conditions, protective relaying, etc., etc.

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