Is it possible to have a 5 meter wire that has 10,000 amps or more current flowing?
I assume this can be done with a step-down transformer and the voltage could be 2V and lower… I assume that most of these wires have low resistance? So that heat would be considered.
Electronic – Over 10,000 amps
conductorscurrentresistance
Related Solutions
Wire 1:
V = 1000V
P = 500W
I = P/V = 500W / 1000V = 0.5A
R_wire = 2 Ohm
Loss in wire 1 = I^2*R = 0.5A^2 * 2 Ohm = 0.5W
Wire 2:
V = 10000V
P = 500W
I = P/V = 500W / 10000V = 0.05A
R_wire = 2 Ohm
Loss in wire 2 = I^2*R = 0.05A^2 * 2 Ohm = 0.005W
UPDATE:
To work out the exact loss, assuming voltage is measured at start of wire:
simulate this circuit – Schematic created using CircuitLab
Total current, I = V1 / (R1 + R2)
Load power, P2 = 500W = I^2 * R2 = (V1^2 R2) / (R1 + R2)^2
This equation can be rearranged into a quadratic form and R2 solved for. Once R2 is found, the loss in the wire can be found by I^2 * R1
To find it using the P = VI formula, calculate V2 as I * R2, the loss is given by (V1 - V2) * I.
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Because of that, the gun already is more efficient than a "regular" soldering iron. Very few needs to further improve it.
Apart, from that, why not choose brass? Because brass is more rigid and likely to break. That's bad for a tool which is meant to be thrown into a tool bag.
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Best Answer
Yes, however these are usually referred to as "bus bars" and not wires. They are essentially bars or rods of copper (or another conductor if required) that carry the current.
You would use a step down transformer if your power source was higher voltage and lower current than what you need. Since you haven't specified where you're getting this power from we can't recommend anything.
Yes. The lower resistance the better. Often copper is used for this, but in some power installations they do use superconductors. That's pretty tricky due to the requirement for cooling.
You can use several bus bars in parallel to permit greater air flow, reducing your need for more metal to carry the same current, or the need for active cooling.
10kA is going to require a lot of copper, even over 5m, and copper is expensive so you'll want to carefully balance the use of the system as a whole against how much copper and cooling you may need.