Conversion using the Short Circuit Current Calculation Formula
Short-circuit current computations for electrical systems rely on the values of impedance alongside voltage strength and fault position. The general equation to find short-circuit current in an AC system looks as follows:
This formula is typically used for DC circuits or in simplified AC circuit models where the only significant resistance is the short-circuit resistance. In real AC systems, the impedance (which includes both resistance and reactance) is more commonly used, but for DC systems, this formula works well:
- Ishort = is the short-circuit current (in Amperes, A)
- V = is the applied voltage (in Volts, V)
- Rshort = is the resistance of the fault path or the short-circuit path (in Ohms, Ω)
Where:
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Short Circuit Current conversion chart
Voltage (V) | Resistance/Impedance (Ω) | Short-Circuit Current (A) |
---|---|---|
12 V | 1 Ω | 12 A |
12 V | 0.5 Ω | 24 A |
24 V | 1 Ω | 24 A |
24 V | 0.5 Ω | 48 A |
48 V | 2 Ω | 24 A |
110 V | 5 Ω | 22 A |
220 V | 10 Ω | 22 A |
400 V | 20 Ω | 20 A |