500,000volt switch failure

[Petrol Head]

Dunno if any of you play with H.V. (no not H I V ).

Normally(in the UK) you would use an expensive piece of switch gear to get the supply off-loaded from a cable before you use a simple isolator like the one in the clip to ensure the juice cant jump back down it for any reason while youre working on it.

Perhaps this was their expensive switch gear!

I think they were left with no option but to use this safety interuptor as the switch, thats why they knew to video it, those guys knew what would happen.

Interesting to see that once the arc opens and the gas gets ionised, the spark will jump any distance and even rises up in the air with the heat.

when it opens click view on the right

 

[Jon Fuller]

i reckon Manos would make a good 'contactor', if only I could get him a job!

 

[Captain Chaos]

smile an everlasting smile

 

[JamesM]

Dunno if any of you play with H.V. (no not H I V ).

You shouldnt play with HV dude:

http://www.voltnet.com/


or more importantly:

http://www.voltnet.com/humor/furby/index.shtml

 

[JamesM]

I did a 15KV 50Hz AC dielectric stress test once (well 4 times actually). It sounded like an overhead line and the fairly rigid High Tension cables were shaking up and down all by themselves.

 

[Petrol Head]

A mate go tthe contract to go and sort out nairobi's national grid. Hewas too busy , wanted me to go, said he tell me what to do when I got there.

Considered telling him what to do , and where to go.

What was that test for then?

 

[JamesM]

A qualification test on a 3000V bus bar enclosure. Part of a high voltage Comms On Power Diplexor. The Diplexor strips the comms from the power.