High Current Bus System

I once told my tennis pro:

you will not teach electricity, and I will not teach tennis,

You sure you want to do it yourself? Believe me, it is not worth the saving not to talk about safety and legalities.

Wangito.

Please indicate your applications phase voltage, distance between the transformer and CB, and country. Will the connection be subject to flex or movement (i.e.- mobile application,etc)?

How do you know you need 2 x 1/4"x5" bus per phase? Have you taken into account short circuit current handling requirements. What is the short circuit rating of your supply and CB? Will they handle these? How about increased ambient temperature inside the busbar cabinet? (etc, etc)

Would also really recommend letting a consultant (or similar) design this and a switchboard manufacturer (or similar) build this (especially if there are a lot of bends involved in the path between the two).

Will only be offering suggestions and points. Kind of insulation - non conducting and non hydroscopic. Precautions required - plenty.

I would be suprised if anyone gave you detailed information on how to do this yourself as applications at this power level are very unforgiving of mistakes and should only be attempted by professionals (but that doesn't mean you cannot learn a thing or two from a healthy discussion on the topic ).

Dude! I can not stress this enough. You obviously have no experience with this. Get a manufacturer of electrical switchgear to do this design for you. Electricity can kill you and is lurking inside equipment of this power level just looking for a way to leap out and do so. This is a job for experts.

This sounds like a school question.

Look in the NEC book or a Commercial design book. Unless your an electrician or a anyone else that is certified, DON'T DO THIS. YOU will get fried

For this critical application do not try it by your self. But to learn more on switchgear configuration and distribution system refer the eaton electric web site. One day you will be a switchgeat designer and you will wonder what detailed calculation envolved with the design.

http://downloads.eatonelectrical.ca/downloads/Power%20Distribution%20System%20Design/Power%20Distribution%20System%20Design.pdf

Hi there,

The one who offered the Eaton design manual, thanks.

I have been working for Eaton (Holec) since 10 years and I did not realize Eaton (CH)has such a good textbook style manaul available.

I guess the request is to design a bus-duct system on the LV side of that 1000KVA Tx, assuming it's a 11kV/400V Dyn1 (or Dyn11) commonly used distribution transformer. Please go to the professionals, unless LV cables could be used for the connection, you may do that simple calculation after some reading.

Regards

OZ

If more than 2 persons are telling you that you are drunk, Just go home and get a good nap.

I said GO home don't even think driving, it can kill you.

Got the massage?

Wangito.

There are BOLD ELECTRICIANS

and there are

OLD ELECTRICIANS.

There are NO OLD, BOLD ELECTRICIANS

Hire a professional, and keep your hands in your pockets.

Obenay N Pebvk

Dear Gaurang

The idea of fabricating the busduct is dangerous.The proper clearances have to be maintained between phase to phase and phase to earth.The strength of insulator supports also have to be verified / certified b4 using the same.Further the busducts have to be tested b4 use.There will be type tests and routine tests to be carried out on the busducts as per stipulations of yr country.These have to pass the tests with satisfactory results(within the allowable tolerance) .

Only then they can be employed in service.

It is a matter of safety of both humans and equipment.

Therefore it is suggested that such projects shall not be undertaken.

regards

SGR

Well Gaurang doesn't answer any more,

I guess he had decided to do it himself.

Wangito.

I am reminded of the person last year in a different discussion group who had been given the job (by his boss no less!) of building an array of 170 SERIES connected Silver-Zinc Saft batteries to get a discharge current of 120A at 357V DC and a charge current of 6A. He said he had no expeirence in dealing in high currents before and was wondering if parallel connected LM350's would handle the high voltage. This immediately set off a few alarm bells (well I immediately went to Defcon 2) as the standard power levels were enormous, the potential short-circuit power was, well, frightning, and the person was seriously under-qualified.

I have never come across someone so out of his/her depth, and no amount of warnings and cautions from users could convince him to let a professional do it instead. I am not sure what bothered me the most, the person out of their depth trying to do the job, or the manager that would intrust such an expensive and dangerous application to that person rather than hiring a professional.

Perhaps this is another case (if it isn't a homework assignment). Oh well atleast they came to the right place. Perhaps we can even save a few of them!

As I was doing as HALO last week, I could have sworn I saw a guy going UP, but when I blinked, he was gone.Must have been something in my eye....

O.N.P.

If you can not do it by yourself and afraid of doing it then leave it. but donot discourage anybody.

someone has to make it and I don't think that it is not doable.