PFC Fault current calculator for Android. Calculate to or from PFC, voltage or earth loop impedance, enter any two values to calculate the third. Check, verify or calculate the circuit prospective fault current, PSCC or PEFC PFC kA. Definitions PSCC: Prospective Short Circuit Current (L-N or L-L) PEFC: Prospective Earth Fault Current (L-E) PFC: The higher value of either the PEFC or PSCC Features - Calculate PFC, PSCC or PEFC - Calculate Zs (from Voltage & PFC) - Calculate Voltage (From PFC &