Message Board Thread - "MOV Arrestor failure"

Title	By	Posted On
MOV Arrestor failure	naferna	11/21/2005
Looking for anyone with experience scanning MOV arrestors (in spetial 245 KV). I would like to know how a failure i determinated in this kind of arrestor. Is it a hot spot or is it like a heat distribution through the whole block? I really apprecite any help
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Re:MOV Arrestor failure	MAG	11/21/2005
Do you have I/R images from different angle of views?
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Re:MOV Arrestor failure	naferna	11/25/2005
Actually, I have some pictures (jpg) from a laboratory test, but is this the only way that a failure is showed? and what about when the arrestor is working in overvoltage condition? How can i differenciate a normal heating due to the current operation from a heating produced by a failure?
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Re:MOV Arrestor failure	TDLIR	11/25/2005
check out a 2004 post on this same subject. http://www.infraredtraining.com/community/boards/thread/1317/ You will also some some images of failed arrestors during operation. Regards, Sonny James http://www.tdlir.com
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