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Ciculating current

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Ciculating current

Postby ShakeyDave » Thu Jul 27, 2006 8:12 pm

Had a live 11kV line down across two lanes of peak hour traffic for a least 10 minutes all the while the tar on the road was on fire, the cars where driving over it and the feeder would not trip because it was tied in to another. Manual tripping of the CB isolated the hazard. Not but for the grace of your prefered higher power, was no one was injured or killed. Squirrel conductor does not like circulating current between two feeders fed from two Zone subs supplied from two different grid exit points. Faults like this keep the grey matter swirling!
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Joined: Wed Jul 12, 2006 10:37 pm
Location: Wild West

Postby Shanedog » Fri Jul 28, 2006 12:05 am

You guys are underpaid thats for sure. :shock:
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Joined: Tue Jul 11, 2006 12:49 am
Location: Gisborne

Postby squizzy » Mon Jul 31, 2006 5:22 pm

Sounds like there was too much impedance in the line not enabling it to draw enough current to blow the fuses etc. We had a similar one a couple of years ago with 22kV burning on the road. The wire came down and just kept feeding to earth It was right on the end of the feeder and small 7/16 copper conductor. We only found it when we turned around the corner and there was all these little fires and sparks on the road with a couple of onlookers a few meters away.....
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Joined: Fri Jul 14, 2006 10:50 pm
Location: Perth Western Australia

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