Enter the voltage (volts) and the resistance during short circuit (ohms) into the calculator to determine the Short Circuit Current.
- All Electrical Calculators
- Fault Current Calculator
- Over Load Current Calculator
- LED Inrush Current Calculator
Short Circuit Current Formula
The following formula is used to calculate the Short Circuit Current.
Ishort = V / Rshort
- Where Ishort is the Short Circuit Current (amps)
- V is the voltage (volts)
- Rshort is the resistance during short circuit (ohms)
To calculate the short circuit current, divide the voltage by the resistance during the short.
A short circuit occurs when the resistance drops to a very low value.
How to Calculate Short Circuit Current?
The following two example problems outline how to calculate the Short Circuit Current.
Example Problem #1:
- First, determine the voltage (volts). In this example, the voltage (volts) is measured to be 500.
- Next, determine the resistance during short circuit (ohms). For this problem, the resistance during short circuit (ohms) is calculated to be .03.
- Finally, calculate the Short Circuit Current using the formula above:
Ishort = V / Rshort
Inserting the values from above and solving the equation with the imputed values gives:
Ishort = 500 / .03 = 16,666.66 (amps)
Example Problem #2:
Using the same process as example problem 1, we first define the variables outlined by the formula. In this case, the values are:
voltage (volts) = 50
resistance during short circuit (ohms) = .25
Entering these values into the formula above gives :
Ishort = 50 / .25 = 200 (amps)
