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Re: MOV lightning arrestor in place of safety gap...MCOV?



Original poster: "Gerald  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Thankyou Jim,

If I never exceed 125KV on the HV side of the PIG, are there any other ways to damage it short of heat and saturation related specs (KVA ratings, etc)???

Gerry R



Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>

At 02:39 PM 5/2/2005, you wrote:
Original poster: "Gerald  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Hi David,

Do you or anyone else know the voltage level that pigs are overvoltage tested at??? My pic is 5KVA 14.4KV if that makes a difference.

Gerry R.
 ANd here you are:
http://www.geindustrial.com/products/brochures/DEA-271-English.pdf

Look at page 2, Conventional. 14400 primary voltage, 120/240 secondary.
That's probably a 15kV voltage class, so the BIL would 125 kV.
(granted, yours isn't a 100kVA)

http://www.geindustrial.com/products/brochures/JVB-004.pdf is probably more your style (residential). 14400 shows 125kV BIL


http://www.geindustrial.com/cwc/products?pnlid=5&famid=42&catid=199&id=tr-resipole&lang=en_US


If your transformer has a nameplate on it (and it should), the BIL rating should be on there too.



Original poster: "Harold Weiss" <hweiss@xxxxxxxxxx>

CAUTION
MOV arrestor installed.  Do not overvoltage test.

So it seems that testing might trash them for lightning protection purposes.

David E Weiss