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ghosh_susanto
Active Contributor

Join Date: Nov 2011
Posts: 17

Electrical Bus Bar

12/22/2014 11:10 AM

I HAVE DESIGNED A ELECTRICAL BUS DUCT SYSTEM

BUS BAR RATING : 4000 AMPS

BUS BAR MATERIAL :ALLUMUNIUM

CONFIGURATION : PHASE 4x( 120x10) mm AL FLAT /PHASE

NEUTRAL : 2 X ( 120 x10) AL FLAT

OVER ALL LENGTH OF BUS DUCT : .8 METER

ATMOSPHERIC TEMPERATURE 40 C MAX & 2 C MIN

MY QUESTION IS THAT WHAT TECHNIQUE SHOULD BE USED TO COMPENSATE THE EXPANSION & CONTRACTION OF THE BUS BAR LENGTH DUE TO CHANGE IN ATMOSPHERIC TEMPERATURE

S.GHOSH
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Crabtree
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Location: Commissariat de Police, Nouvions, occupied France, 1942.
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#1

Re: ELECTRICAL BUS BAR

12/22/2014 12:34 PM

Do keep the noise down, Mildred. There's no need to SHOUT. And if you haven't allowed for expansion then the design is incomplete.

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lyn
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#2

Re: ELECTRICAL BUS BAR

12/22/2014 1:35 PM

Bus Conductor Design and Applications - The Aluminum ...

Technical Data - Hubbell Power Systems
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lyn
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#3

Re: Electrical Bus Bar

12/22/2014 4:28 PM

Point of clarification.

You have PARTIALLY designed a bus duct system. Now, do the rest of the design. That's the mechanical part you don't have yet.
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Fredski
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#4

Re: Electrical Bus Bar

12/22/2014 6:39 PM

you call yourself a designer???????
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ramvinod
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Join Date: Jun 2007
Location: chennai,India
Posts: 592
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#5

Re: Electrical Bus Bar

12/23/2014 10:59 PM

It is not clear whether the these busbars will be mounted inside steel enclosure. Enclosure size is required. Normally the bus trunking systems are designed for an ambient temperature of 50 deg C and final temperature of 85 deg C.It is not clear for what atmospheric conditions these bustrunking systems are designed, In any case 4 x120 x10 mm aluminum busbars per phase will not carry 4000 Amps. Derations have to be applied. Please therefore reconsider your design and selection of busbars.

The busbars selected by you will carry 4200 A open air .Derating has to be applied for temperature, enclosure design etc.

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ghosh_susanto
Active Contributor

Join Date: Nov 2011
Posts: 17
#6
In reply to #5

Re: Electrical Bus Bar

12/26/2014 12:42 PM

DEAR SIR

THANK YOU VERY MUCH FOR YOUR RESPONSE

I DO NOT HAVE ANY DOCUMENTATION IN CONTEXT TO DE RATING FACTOR .WILL YOU BE KIND ENOUGH TO SUGGEST THE DE RATING FACTOR OR ANY DOCUMENT WHICH CAN HELP ME IN DECIDING UPON THE DE RATING FACTOR.

THANKING YOU

S.GHOSH
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7anoter4
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Join Date: Oct 2012
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#7

Re: Electrical Bus Bar

12/27/2014 2:23 PM

lyn proposed "ch.13 Bus Conductor Design and Applications" is very good. You may have the entire Aluminum Conductor Handbook:

http://www.aluminum.org/sites/default/files/Aluminum%20Electrical%20Conductor%20Handbook.pdf

The ABB Switchgear Manual 11th ed. ch.4 you can follow also in order to calculate the busbar.

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Users who posted comments:

7anoter4 (1); Crabtree (1); Fredski (1); ghosh_susanto (1); lyn (2); ramvinod (1)

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