Current Density for TPN Busbar

Current Density is current carried by the bus bar per sq.mm or sq.inch.

In this case your trying pass 200 Amps on bus bar size of 25.6 x 2 mm.therefore current density would be 200/25.6/2 amps per sq.mm.

equal to 3.90 Amps per sq.mm.

This is very high.

Generally ,in India , we restrict to 1.33 amps per sq.mm for copper and 0.8 amps per sq.mm. for Aluminium.

This again depends on other conditions like temperature rise, ambient temperature,enclosure dimensions,busbar arrangement etc.

I m very greatful to get this information

will u tell me the method to calculate size of conductor for

420v

5155A

aluminium

length upto 13 meters.

What is the application.

Is it for Switch Board or Busduct.

Ambient Temperature ?

Expected short circuit current?

please explain the current density calculation and how to choose the busbar selection.

our spec. is 1000A acb 3 incoming and 2 bus coupler ,busbar construction for 1000A,50KA TPN.total 36 mccb outgoing.

is it depend on Material and length

pls mail me @ saxena.e@gmail.com