29-11-2017, 08:18 PM
(This post was last modified: 29-11-2017, 08:20 PM by ppppenguin.)
Though I'd hope the protection arrangements on a 33kV circuit would be rather better. Though if was a high resistance joint that just got worse it's hard for any protection system to pick that up.
A few years back we lost power at home. Evenutally they brought in mobile generators and hooked them up to a couple of the local substations. That went on for a few days. The problem was a blown 11kV underground circuit. ISTR it made quite a nice hole in the pavement. There were 2 blow ups as the 11kV circuit was a ring and they re-energised it until another section failed under the increased load.
At low voltage (230V/400V) underground joint box failures are common enough, especially in central London. Some of them go bang quite nicely. It's wonder that you don't get more deaths and serious injury.
http://www.bbc.co.uk/news/uk-england-london-22934155
A few years back we lost power at home. Evenutally they brought in mobile generators and hooked them up to a couple of the local substations. That went on for a few days. The problem was a blown 11kV underground circuit. ISTR it made quite a nice hole in the pavement. There were 2 blow ups as the 11kV circuit was a ring and they re-energised it until another section failed under the increased load.
At low voltage (230V/400V) underground joint box failures are common enough, especially in central London. Some of them go bang quite nicely. It's wonder that you don't get more deaths and serious injury.
http://www.bbc.co.uk/news/uk-england-london-22934155
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
