User talk:Heron

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Today's selected anniversaries

Wouldn't the flag on the selected anniversaries for December 31 look a little better if you added a border around it? {{border}} Thanks. — Alex 23:02, 31 December 2005 (UTC)[reply]

Link: Wikipedia:Selected_anniversaries/December_31

OK, as it's you. I tried it. --Heron 11:47, 1 January 2006 (UTC)[reply]

Luton flashover

I have started a section on substation design and protection, and I would value your input on something. It is the Luton flashover and related matters.

The Luton flashover was interesting becuase what happened was that an arc from a HT conductor to earth occured. This short then caused circuit breakers to open becuase of the overcurrent. Too many protection devices were activated and then everything went to pot. The defense against such an overreaction in the event of such a fault which I was told about was that a substation has all 'earthed' metal work isolated from earth except for one cable which passes through a current transformer. If current is detected in the earth cable then the location of the fault is clear to the protection electronics. Hence with good design of the protection systems it is possible to open fewer circuit breakers then it would be otherwise. The problem is that I do not have the references to back up this design concept which I was told about some years ago by a substation expert.Cadmium 21:27, 1 January 2006 (UTC)[reply]

You are overestimating my knowledge of electrical engineering, Cadmium. I'm an electronic engineer by training. Although I'm interested in the general principles of power distribution, I know nothing about substation design. You might find something by Googling for "substation earthing site:uk". Good luck :-)

Just to satisfy my curiosity, do you have any links with information about the 'Luton flashover'? I know nothing about it. --Heron 14:43, 2 January 2006 (UTC)[reply]

Sadly I do not have any links which mention the 'Luton flashover' and the rampant outage which followed it. I think that I have found an interesting topic but like you I am pushing myself to my limits. I think that WP will get better if it has a mixture of articles which are basic interoductions to things which people commonly think about and some articles about advanced topics which will make a person start to think for themselfs. As you know something about the priciples of power systems I think that you might be able to help out on the substation page. I have already added some links to a few web pages which give details of how some of the protection systems (ones which sense the dirrection of a fault) work.Cadmium 15:31, 2 January 2006 (UTC)[reply]

OK. I'll keep an eye on the page and help out where I can. --Heron 20:06, 2 January 2006 (UTC)[reply]

data logger

Nice edit - it really needs categorisation as well - I don't know how to do this tho.

--PeterMarkSmith 01:51, 5 January 2006 (UTC)[reply]

Thanks. Someone else has helpfully added a category. It's just a matter of adding '[[Category:Measuring instruments]]' to the bottom of the article. --Heron 11:48, 5 January 2006 (UTC)[reply]