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Fault Impedance in L L G Fault Formulas
Fault Impedance is a measure of the resistance and reactance in an electrical circuit that is used to calculate the fault current that flows through the circuit in the event of a fault. And is denoted by Z
f
. Fault Impedance is usually measured using the Ohm for Electric Resistance. Note that the value of Fault Impedance is always positive.
Formulas to find Fault Impedance in L L G Fault
f
x
Fault Impedance using Sequence Voltages and Zero Sequence Current(LLGF)
Go
f
x
Fault Impedance using C-Phase Voltage (LLGF)
Go
f
x
Fault Impedance using B-Phase Voltage (LLGF)
Go
L L G Fault formulas that make use of Fault Impedance
f
x
Fault Current using B-Phase Voltage (LLGF)
Go
f
x
Zero Sequence Current using B-Phase Voltage (LLGF)
Go
f
x
Fault Current using C-Phase Voltage (LLGF)
Go
f
x
Zero Sequence Current using C-Phase Voltage (LLGF)
Go
f
x
B-Phase Current using B-Phase Voltage(LLGF)
Go
f
x
C-Phase Current using C-Phase Voltage(LLGF)
Go
f
x
Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF)
Go
f
x
Positive Sequence Current using A-Phase EMF and Sequence Impedances(LLGF)
Go
f
x
Zero Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF)
Go
f
x
Negative Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF)
Go
f
x
B-Phase Voltage using Fault Current (LLGF)
Go
f
x
C-Phase Voltage using Fault Current (LLGF)
Go
f
x
B-Phase Voltage using Zero Sequence Current (LLGF)
Go
f
x
C-Phase Voltage using Zero Sequence Current (LLGF)
Go
f
x
Zero Sequence Voltage using Fault Impedance (LLGF)
Go
f
x
Positive Sequence Voltage using Fault Impedance (LLGF)
Go
List of variables in L L G Fault formulas
f
x
Zero Sequence Voltage
Go
f
x
Positive Sequence Voltage
Go
f
x
Zero Sequence Current
Go
f
x
C Phase Voltage
Go
f
x
B Phase Voltage
Go
FAQ
What is the Fault Impedance?
Fault Impedance is a measure of the resistance and reactance in an electrical circuit that is used to calculate the fault current that flows through the circuit in the event of a fault. Fault Impedance is usually measured using the Ohm for Electric Resistance. Note that the value of Fault Impedance is always positive.
Can the Fault Impedance be negative?
No, the Fault Impedance, measured in Electric Resistance cannot be negative.
What unit is used to measure Fault Impedance?
Fault Impedance is usually measured using the Ohm[Ω] for Electric Resistance. Megohm[Ω], Microhm[Ω], Volt per Ampere[Ω] are the few other units in which Fault Impedance can be measured.
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