Table of Contents
- 1 What is the current carrying capacity of aluminium bus bar?
- 2 What is the ampacity of an aluminum bus bar 1/4 thick and 2 wide?
- 3 How is aluminium busbar size calculated?
- 4 What is bus bar rating?
- 5 How is bus bar system calculated?
- 6 How to calculate the current carrying capacity of a busbar?
- 7 How many amps can a bus bar carry?
What is the current carrying capacity of aluminium bus bar?
Aluminum Busbar current carrying capacity
| BUS | : Constructional details and Current carrying capacity at 35 C | |
|---|---|---|
| Size in MM | Cross sectional area in MM2 | Weight (Approx) Kg/Mtr |
| 12 x 2 | 23.5 | 0.0633 |
| 15 x 2 | 29.5 | 0.0795 |
| 15 x 3 | 44.5 | 0.120 |
How do you calculate the current carrying capacity of a bus bar?
Which means, take a copper bus bar of 100 mm width and 10 mm thickness, the area of the copper bus bar is 10 * 100 sqmm. The total current carrying capacity of the busbar is 1.2 * area => 1000 sqmm* 1.2 =1200 Amps. Hence the total current carrying capacity of the copper 1200 Amps of 100mm width and 10 mm thickness.
What is the ampacity of an aluminum bus bar 1/4 thick and 2 wide?
This can be in the form of a 1/4” x 4” bus bar. A 1/2” x 4” bus bar would be 2500 amperes. A one-inch square aluminum bus bar has an ampacity of approximately 1000 amperes. A 1/2“ x 4” aluminum bus bar would be approximatley 2000 amperes.
What size busbar do I need?
Ampacities and Mechanical Properties of Rectangular Copper Busbars
| Required Ampacity,* (Range) Amp | Busbar Dimensions, In.** | |
|---|---|---|
| 30 °C Rise | 50 °C Rise | |
| 4000 (4000-4499) | 1/2×12 3/4×10 | 1/4×12 3/8×10 1/2×8 |
| 4500 (4500-4999) | 3/4×12 | 1/2×10 3/4×8 |
| 5000 (5000-5999) | 3/8×12 1/2×12 3/4×10 |
How is aluminium busbar size calculated?
THUMB Rule for Busbar : For Aluminium : 0.7 Amps / 1 Sq.mm of Bar. For Copper : 1.2 Amps / 1 Sq.mm of Copper. i.e They used 0.75 Amps / 1 Sq.mm of Bar & 1.4 Amps / 1 Sq.mm for Aluminium & Copper Respectively.
What is the current density of aluminium?
Aluminum has a density of 2.7 grams per cubic centimeter no matter how much of it you have.
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 aluminium busbar weight calculated?
To find out the total weight per unit of your aluminium extrusion simply multiply the kg/m by the length of the finished product.
How is bus bar system calculated?
THUMB Rule for Busbar : For Aluminium : 0.7 Amps / 1 Sq.mm of Bar. For Copper : 1.2 Amps / 1 Sq.mm of Copper.
How do you calculate the current carrying capacity of Aluminium conductor?
Aluminium current-carrying is equal to 0.8 times of the total volume of the aluminium (length*breath*thickness). Let’s have a simple example of 4 sqmm bus bar. Apply our equation, Current carry capacity of 35 sqmm bar= 0.8* 35 = 28 Amps.
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.
How big is an aluminium bus bar per phase?
Aluminium bus bar = 80*10*.8=640A where 80*10 is size if bus bar usually available is the market. so we can use 80x10sqmm al. busbar per phase for 630A. for TPN- (3.5)x80x10
How many amps can a bus bar carry?
In practically, Busbar means a conductor, which allows both Alternating current and Direct current that all. There is no difference or special manufacturing is required to carry alternating current and direct current. If a bus bar can allow 150 Amps means, we can send either AC 150 Amps or DC 150 Amps.
How to calculate the size of the bus bar?
Bus bar Area per Phase = Bus width X Bus Thickness X Length of Bus X No of Bus bar per Phase. Bus bar Area per Phase = 75x10xX500X2= 750000mm. Total Bus bar Area for Enclosure= No of Circuit X ( No of Phase + Neutral )X Bus bar Area per Phase. Here we used Size of Neutral Bus is equal to Size of Phase Bus.