Negative Sequence Impedance in L L 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.

L L Fault formulas that make use of Negative Sequence Impedance

fxPositive Sequence Current using A-Phase EMF(LLF)Go

fxFault Current(LLF)Go

fxB-Phase Current using A-Phase EMF(LLF)Go

fxA-Phase EMF using Positive Sequence Current and Sequence Impedances(LLF)Go

fxPositive Sequence Voltage using A-Phase EMF and Sequence Impedances(LLF)Go

fxNegative Sequence Voltage using A-Phase EMF and Sequence Impedances(LLF)Go

fxA-Phase EMF using Positive Sequence Voltage(LLF)Go

fxA-Phase EMF using Fault Current(LLF)Go

fxFault Impedance using A-Phase EMF(LLF)Go

fxPositive Sequence Impedance using A-Phase EMF and Positive Sequence Current(LLF)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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