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Forum: Tech Log

22nd Jun 2007, 09:57

Replies: 81

115V/400Hz

Views: 39,694

Posted By west lakes

Some additional bits and pieces. IO540 Just...

Some additional bits and pieces.
IO540
Just checked clearances in the UK supply industry are: -
up to 33kV .8m, 132kV 0.7m added to these is an application factor dependant on the work involved...

Forum: Tech Log

18th May 2007, 22:13

Replies: 81

115V/400Hz

Views: 39,694

Posted By west lakes

ChristiaanJ agreed thats why i said was/is...

ChristiaanJ

agreed thats why i said was/is (some people don't belive those who know).
Have seen old electrical books that used to advise spreading flourescents over 3 phases to reduce this...

Forum: Tech Log

18th May 2007, 21:47

Replies: 81

115V/400Hz

Views: 39,694

Posted By west lakes

Hmm Just remembered london underground used to...

Hmm
Just remembered london underground used to use high frequency a.c. (and possibly british rail) when flourescent lights were first introduced. this was to keep size of rotary dc to ac convertors...

Forum: Tech Log

18th May 2007, 21:31

Replies: 81

115V/400Hz

Views: 39,694

Posted By west lakes

were all supposed to be 230/400, the main...

were all supposed to be 230/400, the main defference is the permitted variation. we had + or- 6% ion 240V its now +10 -6.

the lightbulb one is good one - you should see how short a life a 230v...

Forum: Tech Log

18th May 2007, 21:16

Replies: 81

115V/400Hz

Views: 39,694

Posted By west lakes

ChristiaanJ The accident you describe is not...

ChristiaanJ
The accident you describe is not uncommon over here, as well as the ill advised that try to walk?? along third rail DC lines in the south.
All absolutely tragic and unneccesary.
...

Forum: Tech Log

18th May 2007, 20:51

Replies: 81

115V/400Hz

Views: 39,694

Posted By west lakes

accidents

I'll stand corrected on the fence question.

ChristiaanJ
Not sure I agree and your take on relation of phase to neutral & phase to phase Uk system is ph - ph is 1.732 (root3) times ph to n. i.e...

Forum: Tech Log

18th May 2007, 17:48

Replies: 81

115V/400Hz

Views: 39,694

Posted By west lakes

other bits

yea not forgetting the Frence CC 40100 loco with 4 voltage choices!

Forget to mention the current bits
50mA (.05) can kill an adult!! especially if current flow is through the heart.
Myth - the...

Forum: Tech Log

18th May 2007, 16:22

Replies: 81

115V/400Hz

Views: 39,694

Posted By west lakes

Some input on the voltage/frequency/current questions

Voltage
Usa does generally use 115v 60hz A.C. but has other voltages 220etc available in some areas. It is correct that the lower voltage is "safer" in similar conditions than say the european...

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