Zero Sequence Impedance(LLGF) Calculator

✖Zero Sequence Voltage consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counterclockwise together.ⓘ Zero Sequence Voltage [V₀]			+10% -10%
✖Zero Sequence Current consists of a balanced three-phase current, phasors of which all have the same phase angles and rotate counterclockwise together.ⓘ Zero Sequence Current [I₀]			+10% -10%

✖Zero Sequence Impedance consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counter clockwise together.ⓘ Zero Sequence Impedance(LLGF) [Z₀]

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Formula

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Zero Sequence Impedance(LLGF)

Formula

`"Z"_{"0"} = -"V"_{"0"}/"I"_{"0"}`

Example

`"-8Ω"=-"17.6V"/"2.20A"`

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Zero Sequence Impedance(LLGF) Solution

STEP 0: Pre-Calculation Summary

Formula Used

Zero Sequence Impedance = -Zero Sequence Voltage/Zero Sequence Current
Z₀ = -V₀/I₀
This formula uses 3 Variables

Variables Used

Zero Sequence Impedance - (Measured in Ohm) - Zero Sequence Impedance consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counter clockwise together.
Zero Sequence Voltage - (Measured in Volt) - Zero Sequence Voltage consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counterclockwise together.
Zero Sequence Current - (Measured in Ampere) - Zero Sequence Current consists of a balanced three-phase current, phasors of which all have the same phase angles and rotate counterclockwise together.

STEP 1: Convert Input(s) to Base Unit

Zero Sequence Voltage: 17.6 Volt --> 17.6 Volt No Conversion Required
Zero Sequence Current: 2.2 Ampere --> 2.2 Ampere No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Z₀ = -V₀/I₀ --> -17.6/2.2

Evaluating ... ...

Z₀ = -8

STEP 3: Convert Result to Output's Unit

-8 Ohm --> No Conversion Required

FINAL ANSWER

-8 Ohm <-- Zero Sequence Impedance

(Calculation completed in 00.020 seconds)

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Home » Engineering » Electrical » Power System » Fault » Shunt Faults » Unsymmetrical Faults » L-L-G Fault » Impedance » Zero Sequence Impedance(LLGF)

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Created by Nisarg

Indian Institute of Technology,Roorlee (IITR), Roorkee

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Chandigarh University (CU), Punjab

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< 6 Impedance Calculators

Positive Sequence Impedance using A-Phase EMF(LLGF)

Go Positive Sequence Impedance = (A Phase EMF-Positive Sequence Voltage)/Positive Sequence Current

Fault Impedance using Sequence Voltages and Zero Sequence Current(LLGF)

Go Fault Impedance = (Zero Sequence Voltage-Positive Sequence Voltage)/(3*Zero Sequence Current)

Negative Sequence Impedance(LLGF)

Go Negative Sequence Impedance = -Negative Sequence Voltage/Negative Sequence Current

Zero Sequence Impedance(LLGF)

Go Zero Sequence Impedance = -Zero Sequence Voltage/Zero Sequence Current

Fault Impedance using C-Phase Voltage (LLGF)

Go Fault Impedance = C Phase Voltage/(3*Zero Sequence Current)

Fault Impedance using B-Phase Voltage (LLGF)

Go Fault Impedance = B Phase Voltage/(3*Zero Sequence Current)

Zero Sequence Impedance(LLGF) Formula

Zero Sequence Impedance = -Zero Sequence Voltage/Zero Sequence Current
Z₀ = -V₀/I₀

What is a double line to ground fault?

A double line to ground fault is a type of fault that can occur in an electrical power system. It is characterized by two of the three conductors in a three-phase power system coming into contact with the ground or earth.

How to Calculate Zero Sequence Impedance(LLGF)?

Zero Sequence Impedance(LLGF) calculator uses Zero Sequence Impedance = -Zero Sequence Voltage/Zero Sequence Current to calculate the Zero Sequence Impedance, The Zero Sequence Impedance(LLGF) formula is defined as a measure of the impedance of a three-phase electrical power system with respect to the zero sequence components of the system. Zero Sequence Impedance is denoted by Z₀ symbol.

How to calculate Zero Sequence Impedance(LLGF) using this online calculator? To use this online calculator for Zero Sequence Impedance(LLGF), enter Zero Sequence Voltage (V₀) & Zero Sequence Current (I₀) and hit the calculate button. Here is how the Zero Sequence Impedance(LLGF) calculation can be explained with given input values -> -8 = -17.6/2.2.

FAQ

What is Zero Sequence Impedance(LLGF)?

The Zero Sequence Impedance(LLGF) formula is defined as a measure of the impedance of a three-phase electrical power system with respect to the zero sequence components of the system and is represented as Z₀ = -V₀/I₀ or Zero Sequence Impedance = -Zero Sequence Voltage/Zero Sequence Current. Zero Sequence Voltage consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counterclockwise together & Zero Sequence Current consists of a balanced three-phase current, phasors of which all have the same phase angles and rotate counterclockwise together.

How to calculate Zero Sequence Impedance(LLGF)?

The Zero Sequence Impedance(LLGF) formula is defined as a measure of the impedance of a three-phase electrical power system with respect to the zero sequence components of the system is calculated using Zero Sequence Impedance = -Zero Sequence Voltage/Zero Sequence Current. To calculate Zero Sequence Impedance(LLGF), you need Zero Sequence Voltage (V₀) & Zero Sequence Current (I₀). With our tool, you need to enter the respective value for Zero Sequence Voltage & Zero Sequence Current and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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