Posted by Dean on September 09, 2018 at 09:36:08 from (68.50.160.151):
In Reply to: Back Up Generators posted by Dean on September 08, 2018 at 20:10:40:
Interesting update:
Power came back up at about 3:00 AM. My power was out for about 10 hours.
This morning I walked the line from my house to the 60' pole with the 34 KV three phase line and the 7,200 V line beneath, about 500-600 feet from my house and found evidence that crews had climbed the pole to replace the fuse and opened lead wire.
The pole has two local taps, one supplying power to the 4 customers on my private road and another supplying power to 3 customers on the other side of the highway. Until this morning I had not noticed that these taps were from different phases.
Just now, I talked to my neighbor who happens to be city engineer for a nearby town and is well acquainted with Duke Energy local staff. Duke staff told him that there was no fault on our 4 customer line (OK, why did the fuse supplying only this line open?). Rather, the fault was to one phase of the 7,200 V line providing local service. OK, that explains why the 3 customers on the other side of the highway did not loose service, as I now know that their 3 customer tap is connected to a different phase, which must have not been affected. Moreover, the outage affected numerous customers between my area and the substation about 5 miles away where the 34 KV line connects to the HT towers. So far, this makes sense.
What does not make sense is why the fuse supplying my 4 customer 7,200 V line opened with no fault on the line when the phase supplying this line failed. I can not explain this.
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