Negative Sequence Impedance in L L G Fault Formulas

Negative Sequence Impedance consists of balanced three-phase impedance phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB rotation. And is denoted by Z₂. Negative Sequence Impedance is usually measured using the Ohm for Electric Resistance. Note that the value of Negative Sequence Impedance is always negative.

Formulas to find Negative Sequence Impedance in L L G Fault

fxNegative Sequence Impedance(LLGF)Go

L L G Fault formulas that make use of Negative Sequence Impedance

fxNegative Sequence Current using Negative Sequence Voltage (LLGF)Go

fxPositive Sequence Current using A-Phase EMF and Sequence Impedances(LLGF)Go

fxZero Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF)Go

fxNegative Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF)Go

fxNegative Sequence Voltage using Negative Sequence Current (LLGF)Go

List of variables in L L G Fault formulas

fx Negative Sequence Voltage Go

fx Negative Sequence Current Go

FAQ

What is the Negative Sequence Impedance?

Negative Sequence Impedance consists of balanced three-phase impedance phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB rotation. Negative Sequence Impedance is usually measured using the Ohm for Electric Resistance. Note that the value of Negative Sequence Impedance is always negative.

Can the Negative Sequence Impedance be negative?

Yes, the Negative Sequence Impedance, measured in Electric Resistance can be negative.

What unit is used to measure Negative Sequence Impedance?

Negative Sequence 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 Negative Sequence Impedance can be measured.

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