Fault Impedance using A-Phase EMF(LLF) evaluator uses Fault Impedance = A Phase EMF/Positive Sequence Current-(Positive Sequence Impedance+Negative Sequence Impedance) to evaluate the Fault Impedance, The Fault Impedance using A-phase EMF(LLF) formula is defined as the resistance that is present in an electrical power system when a fault occurs. The fault impedance represents the opposition to the flow of fault current in the power system, and it is an important factor in determining the magnitude of the fault current. Fault Impedance is denoted by Zf symbol.
How to evaluate Fault Impedance using A-Phase EMF(LLF) using this online evaluator? To use this online evaluator for Fault Impedance using A-Phase EMF(LLF), enter A Phase EMF (Ea), Positive Sequence Current (I1), Positive Sequence Impedance (Z1) & Negative Sequence Impedance (Z2) and hit the calculate button.