Busbar Calculation 3

[mikeangel]

Hello all,

I need help in the following issue: Busbar calculation.

Formulas
Dimensioning criteria
Calculation Steps

Could you please give some help in this? Maybe you know a reference guide or a paper.

Thanks

 

[waross]

I need to buy a battery.
Can you help me with the voltage, amp/hours and physical dimensions. Best price would be a bonus.
Seriously, what is your application? Are these bus bars for a substation, an MCC, a PDC, or transit supply?

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[mikeangel]

Substation

 

[jghrist]

605-1998 Guide for the Design of Substation Rigid-Bus Structures

Member and Affiliate Price: $107.00
Non-Member Price: $133.00

Rigid-bus structures for outdoor and indoor, air insulated, and alternating current substations are covered. Portions of this guide are also applicable to strain bus structures or direct current substations, or both. Ampacity, radio influence, vibration, and forces due to gravity, wind, fault cur-rent, and thermal expansion are considered. Design criteria for conductor and insulator strength calculations are included.

https://sbwsweb.ieee.org/ecustomerc...tomer&SWEHo=sbwsweb.ieee.org&SWETS=1192713657

 

[mikeangel]

Thank you jghrist,

But it's to expensive for me

Maybe you know a free paper or other solution , i don't know...

Thanks

 

[Marmite]

The attached file may be of use, but it has a European slant.
Regards
Marmite

 

[mikeangel]

Thanks Marmite.

I'll try to create a excel sheet for make the calculation.

If you have any sugestions, please tell me.

Thanks

 

[mikeangel]

I still need help in this issue.

I've to calculate a tubular cooper busbar for a outdoor station (europe standards).

I need a technical guide (free) that covers this subject.

Anyone?

 

[ykee]

I think its one thing to ask for technical advice, and its another thing to state that you are seeking technical advice here instead of purchasing the necessary standards and learning for yourself. I would suggest you go to your manager or your client and request $$ to go and get the tools (in this case literature) and become familiar with it.

 

[davidbeach]

What ykee said. Don't be so cheap. It took work to develop and publish the standards and that work should be compensated.

 

[mikeangel]

Thanks alot for your posts ykee and davidbeach. You've been very usefull. Some words: davibeach it was exacly this kind of advices that i've been looking for. ykee, you're are right.

But, i still need help in this issue. I've calculate a tubular cooper busbar for a outdoor station (europe standards).

I've some clues but i steel need a technical support to confirm.

Anyone?

 

[Marmite]

Mikeangel,
if you ask specific questions you will more than likely get specific answers. Waross's original response, albeit tinged with sarcasm was very valid. So far you've asked vague generic questions. Don't be surprised to receive responses in the same vain. If you provide more basic detail as to the application, electrical data, diagram etc it is very likely you will get the response you require. There's nothing engineers like more than getting to grips with a situation they can visualise in their own minds. I for one would have lost the will to live long before I'd finished typing in instructions on how to design a substation from the ground up.
Regards
Marmite

 

[mikeangel]

Thanks Marmite.

 

[davidbeach]

Another problem here is that when needing to ask these very general questions you probably don't even know enough to know what questions to ask. You can narrow things down and ask a specific question as suggested above, but that may not be the most important question to be asking. Any project that can afford to even contemplate substation bus work has enough budget to afford a $133 standard. At this point the standard will probably save more money than it costs, even if only by cutting an hour out of the design time.

Broad, general questions about things like this can make people very nervous. This site can never be an adequate tutorial on substation design, but if you have a have specific question with what you've tried to solve it and why your solutions didn't work you will find very helpful, detailed responses.

 

[mikeangel]

It was never my intention to cause bad environment to this forum. I only wanted someone help.

I apologise for the time that I made to you waste. I am not upsetting any more. Thank you all.

Best regards
Miguel

 

[ScottyUK]

mikeangel,

You might want to have a look at the following:

http://www.cda.org.uk/megab2/elecapps/pub22/index.htm

This used to be available as a proper book, now just as a download. There are some useful equations if you are working from first principles.

If this is a design for a service environment then the advice from the others is spot on: buy the standard. Your client will (should) demand that the design conforms with the standard, so you will need to refer to it.


----------------------------------

If we learn from our mistakes I'm getting a great education!

 

[desertfox]

hi mikeangel

Try looking at this site:-

http://www.cda.org.uk/megab2/elecapps/pub22/index.htm

desertfox

 

[davidbeach]

Isn't that what ScottyUK said?

 

[desertfox]

yes it is but I am sure it wasn't there when I posted, a may just have missed it.

desertfox

 

[ScottyUK]

DesertFox must be on dialup - our posts are only 1 hour 2 minutes apart!

My copy of the CDA book is from the late fifties or early sixties. I'm not sure why they stopped publishing it but it is a shame. I much prefer a reference book to be something I keep on a shelf. There are some marvellous old photos of switchgear: one is a 250V 40,000A DC circuit breaker. That's 40kA thermal rating!


----------------------------------

If we learn from our mistakes I'm getting a great education!