design of busbars
design of busbars
(OP)
Please design a copper bus bar system for an enclosure of 2 x 1.8 x 1 mtr. The current rating of the bus is 7000 A rms at 415 V for 180 secs. Thereafter the current is 1600 A rms continuous at the same voltage.
While 7000 A is being passed the bus bar should be within permissible temperature limite. The temp permitted at 1600 A is 80 deg C. (40 + ambient 40)
I only need to know the cross section of conductor needed. No other details are required.
Exact calculation is required.
Regards
Hari Haran Rajgopal
While 7000 A is being passed the bus bar should be within permissible temperature limite. The temp permitted at 1600 A is 80 deg C. (40 + ambient 40)
I only need to know the cross section of conductor needed. No other details are required.
Exact calculation is required.
Regards
Hari Haran Rajgopal





RE: design of busbars
I might suggest that you pose this question on the Electrical Power Engineering it seems more like their sort of question.
Any help ?, yes no let me know.
Regards
RE: design of busbars
RE: design of busbars
anyway, you can use 1 sq. inch of copper carries 1000 amps..
..the resistivity of a pure copper is ...10.2 at 32 degF ..also,
this might help too..
Area of a circle = 0.785(dxd) cir mils where d is the diameter in cir. mils
In square measure,
Area of cir mils = 0.785x1x1 =0.785 sq. mils
Cir mils =0.785d squared/ 0.785 = d squared
good luck
dydt
RE: design of busbars
RE: design of busbars
1. NEMA BU-1 Busways
2. NEMA BU-1.1 General Instruction for Proper Handling, Installation,
Operation, and Maintenance of Busways Rated 600 Volts or Less
3. UL Std 857 Electric Busways and Associated Fittings
4. ANSI/IEEE C37.20 Switchgear Assemblies Including Metal-Enclosed Bus
5. ANSI/IEEE C37.23 IEEE Standard for Metal-Enclosed Bus and Calculating Losses in Isolated-Phase Bus
6. ANSI/NFPA 70 National Electrical Code
7. Visit
http://busbar.copper.org/ampacity/busbar.htm
8. Search this Forum. There are some excellent postings already