How do you find the short circuit current of a busbar?
Bus bar Cross Section Area as per Current= Current Rating of Bus bar / Current Density of Material. Bus bar Cross Section Area as per Current= 697 / 1.6. Bus bar Cross Section Area as per Current= 436 Sq.mm.
How is busbar rating calculated?
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.
How do you calculate the current carrying capacity of aluminium busbar?
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 do you calculate short circuit?
The formula is I = V/R. When there is a short circuit the resistance becomes very small, and that means the current becomes very large. If the resistance was zero, then the calculated fault current would go to infinity.
How do you calculate short circuit level?
This applied voltage divided by the rated primary voltage (times 100) is the impedance of the transformer. Example: For a 480 Volt rated primary, if 9.6 volts causes secondary full load current to flow through the shorted secondary, the transformer impedance is 9.6/480 = . 02 = 2%Z.
What is the voltage drop calculation formula?
Voltage drop of the circuit conductors can be determined by multiplying the current of the circuit by the total resistance of the circuit conductors: VD = I x R.
What is potential drop formula?
A current of 9A flows through a circuit that carries a resistance of 10 Ω. Determine the voltage drop across the circuit. V= 90 v….Given:
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How is aluminium busbar size calculated?
Assume we have an aluminium busbar with Width x Depth = 10 x 10 mm. It means this busbar has 100 Sq.mm with current capacity 100 x 0.7 A = 70 A.
How do you calculate short circuit kVA?
The product of normal system voltage and short-circuit current at the point of fault expressed in kVA is known as Short Circuit kVA. i.e. Short Circuit kVA is obtained by multiplying the base kVA by 100/% X.
How much current can a busbar handle?
Thumb Rule for Busbar Amp Size Both aluminium and copper have their own ability to withstand currents. A 1 Sq.mm of aluminium busbar can withstand 0.7 Amperes. A 1 Sq.mm of copper busbar can withstand 1.2 Amperes.
How do you calculate K in voltage drop?
The K factor is found by multiplying the conductor’s resistance (ohm/kFT) by the conductor’s circular mil area and then dividing by 1000.
What is the current density of aluminium busbar?
Current density is generally 0.8 A per sq. mm for aluminium & 1.6 A per sq. mm for copper.
How do you calculate short circuit capacity?
Conservatively, it can be as high as 20–30 times the normal full-load current of the system. For example, if a power system is designed to carry a full-load current of 2000 A, then the short-circuit capacity could be in the neighborhood of 20 * 2000 (40,000) A, or even 30 * 2000 (60,000) A.