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)

Credits

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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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Impedance Calculators

Positive Sequence Impedance using A-Phase EMF(LLGF)
​ LaTeX ​ Go Positive Sequence Impedance = (A Phase EMF-Positive Sequence Voltage)/Positive Sequence Current
Fault Impedance using Sequence Voltages and Zero Sequence Current(LLGF)
​ LaTeX ​ Go Fault Impedance = (Zero Sequence Voltage-Positive Sequence Voltage)/(3*Zero Sequence Current)
Negative Sequence Impedance(LLGF)
​ LaTeX ​ Go Negative Sequence Impedance = -Negative Sequence Voltage/Negative Sequence Current
Zero Sequence Impedance(LLGF)
​ LaTeX ​ Go Zero Sequence Impedance = -Zero Sequence Voltage/Zero Sequence Current

Zero Sequence Impedance(LLGF) Formula

​LaTeX ​Go
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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