£900,000 for cables

By Martin Neville

Saturday, March 1, 2014

 

AROUND £900,000 is being invested in overhead power cables between East Cowes and Wootton Common.

A Southern Electric Power Distribution spokesman said: "This project will make sure our equipment on the Island is as robust and resilient as possible.

"This line is an essential part of the Island’s network."

Reporter: martinn@iwcpmail.co.uk

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by David Blackford

3rd March 2014, at 10:57:00

PS - I wonder if battery driven cars are crash tested

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by David Blackford

3rd March 2014, at 10:55:53

That is interesting James - How do they protect the leads from battery to motors? or indeed the motors?

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by James McAdder

3rd March 2014, at 10:43:36

Lithium Ion batteries have protection against external short circuits, but internal shorts can, and do, occur, usually due to manufacturing errors, and the results can be spectacular. The overload occurs in one cell, but the heat generated is transferred to adjacent cells, which causes them to overheat and explode too.

Exploding Li-ion batteries grounded the entire Boeing 787 "dreamliner" fleet. Boeing's solution was to isolate the cells and encase the entire battery in a sealed and reinforced box which vents to the outside.

In other words, Boeing couldn't ensure that their Li-ion batteries won't suffer a catastrophic failure, so their solution was to protect the aircraft when it does happen.

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by David Blackford

3rd March 2014, at 07:48:55

How about a Li-ion car battery! - Wow - if that shorted out in an accident!

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by Den Young

2nd March 2014, at 19:46:02

thanks for that James, too far back to remember

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by James McAdder

2nd March 2014, at 19:19:57

The only way you will get a burn from a 12v car battery is if you short it out with a good conductor (e.g. a spanner) you won't get a burnfron touching the terminals.

You are also incorrect about capacitors. Yes they can discharge very quickly, but the potential difference is only that of the source that charged it. You cannot get a shock from a capacitor charged at 12v.

Inductors are a different matter, of course.

It is basic schoolboy physics, Den Young.

Any views or opinions presented in the comments above are solely those of the author and do not represent those of the Isle of Wight County Press.

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