What is current density of busbar?
The permissible current density is not therefore constant: it is approximately 3 A/mm2 for small bars and falls to 1 A/mm2 for groups of large bars. Busbars can be created using copper or aluminium bars. Flat copper bars are used for busbars up to 4000 A with Legrand supports.
How does aluminium bus bar calculate weight?
To find out the total weight per unit of your aluminium extrusion simply multiply the kg/m by the length of the finished product.
What is bus bar rating?
The IEEE states a busbar should be rated at the highest amperage passing through any section of the busbar, with a maximum of a 50° C rise in temperature from an ambient temperature of 50° C. This rating method avoids excess terminal temperature at the wire termination.
How is bus bar capacity calculated?
Hence the formula for calculating current carrying capacity,
- Copper: Copper busbar current carrying capacity = 1.2 * Busbar width in mm * Thickness in mm Amps.
- Aluminium: Aluminium busbar current carrying capacity = 0.8 * Busbar width in mm * Thickness in mm Amps.
- Iron Busbar.
- GI Bus bar.
- Silver Bus Bar.
- Example:
How much does bus bar weigh?
RECTANGULAR SHAPED BARE COPPER BUSBARS
| Size | a (mm) | Unit Weight (kg/m) |
|---|---|---|
| 130×7 | 7 | 8,09 |
| 140×10 | 10 | 12,44 |
| ROUNDED SHAPE COPPER BARS | ||
| Delivered in diameters of Ø 8-10-12-14-15-16-18-20-22-24-26-28-30-32-34-35-36 mm and in lengths 2 – 6 m. |
How do you calculate busbar weight?
Weight per Meter = (A x A x 0.007361) Kg in Brass Kg. in Brass Kg. in Copper Kg.
How do you calculate the rating of a busbar?
To calculate the rating of a busbar, enter in the width and thickness of the bar, and the ambient temperature around the bar. Select the units as either metric or imperial, and the temperature as Celsius or Fahrenheit. The program displays both the current rating of an aluminium bar of these dimensions and a copper bar of these dimensions.
Is the rating of bus bar 25 ka correct?
As per standard, the rating of bus bar 25 KA is correct. But i want to know how to derive the value 25 KA. Could you please send me any model calculation regarding bus bar short circuit calculation.
How to calculate the current carrying capacity of a busbar?
Bus bar current Calculator: Enter the breadth and thickness of the busbar; do not enter the length of the busbar. Then press the calculate button, you get the aluminium or copper busbar current carrying capacity in amps. You can choose the type of busbar, either aluminium or copper or galvanized bars or iron busbar or silver in the results.
What is the temperature of the bus bar?
Temperature rise of Bus Bar Bar during Fault (θt=θ1-θ)=100°C. Ambient Temperature (θn) =50°C. Maximum Bus Bar Temperature Rise=55°C.