Busduct Question

Off the cuff (caveat emptor), the busbar seems undersized for the current, and is likely to run hot .... how hot is too hot for your application ? You will most likely need louvres. If you want ingress protection, you can provide a perforated sheet behind them. This may prevent insect ingress, not dust-proof though.

All in all, a conflicting requirement. You should use more copper and seal up the thing airtight.

If you feel the busbars are undersized, can you give a rough calculation indicating proper size of busbars for an enclosed arrangement ?

Mr sridhar thnx a lot for sharing nice article

952.5 sq mm of copper for 1600A is OK i think

your voltage system suggest u must b having good phase to phase and phase to duct body clearance?

so it will also help in cooling

However system fault is also to be kept in mind -MAx short circuit current of system and time as well, like 70KA for 1 sec etc

I don't normally do this, but a very rough calculation indicates that a 150mm x 6.35mm bus running 1600A continuous should (and I mean should) work with an expected temperature rise of the bus work of 30 degrees C (when referenced to an ambient temperature of 30 degrees C). Your bus work will likely be running at around 60 degrees C or more, so you may need louvres to remove the heat.

This is a guide only and may not be suitable for you due to unknown application-specific requirements that have not been explained here. You will still need to perform a proper analysis yourself.

Depending on the application, louvres fitted with thin metal mesh screens to prevent insect and dirt ingress may be a suitable option.

i think The busbar size to be revised because the size of busbar not adequate at time of full load reff . Below example .

150 x 6.35 = 952.5 x 1.6 = 1524 A

if you consider derating factor the current carring capacity may be reduced and u may be consider louver type , if not possible due to site condition u can consider sandwitch type busduct with 50 kA /1 sec fault condition .

Bala.A

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