Actually guys, it is not a fuse per say, it is fed from a circuit breaker.
Not the kind found in the home either.
Most likely there was a stuck breaker which DOES happen. And from the video
I would venture to say it was a 69Kv primary at least. My employer (The
Board of Public Utilities in Kansas City Kansas), Had a lightning strike hit
one of our 161kv/69kv transformers and it took them about 9 hours to put the
fire out. The insulating oil has a high flashpoint, but when it does catch
fire....look out
Chuck K0XM
Lead Substation Technician (25 Yrs)

 

-----Original Message-----
From: [email protected]
[mailto:[EMAIL PROTECTED] On Behalf Of Chuck Kelsey
Sent: Thursday, January 05, 2006 7:06 PM
To: [email protected]
Subject: Re: [Repeater-Builder] had a little power supply trouble the
otherday...

More than likely the fusing was proper. Typically substation transformer 
size along with fusing is coordinated and engineered rather extensively. 
My suspicion is that a component failure may have contributed to the 
total failure of the transformer. It is possible the a fuse did open, 
but that the fuse holder assembly could have failed in such a way that 
an arc continued the current flow regardless of the open fuse.

It would be interesting to know exactly what did happen.

Chuck
WB2EDV








 
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