Positive Sequence Impedance for L-G-F Calculator

✖EMF Induced in Primary Winding LG is the production of voltage in a coil because of the change in magnetic flux through a coil.ⓘ EMF Induced in Primary Winding LG [E_1(lg)]			+10% -10%
✖Positive Sequence Voltage LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.ⓘ Positive Sequence Voltage LG [V_1(lg)]			+10% -10%
✖Positive Sequence Current LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.ⓘ Positive Sequence Current LG [I_1(lg)]			+10% -10%

✖Positive Sequence Impedance LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.ⓘ Positive Sequence Impedance for L-G-F [Z_1(lg)]

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Formula

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Positive Sequence Impedance for L-G-F

Formula

`"Z"_{"1(lg)"} = ("E"_{"1(lg)"}-"V"_{"1(lg)"})/"I"_{"1(lg)"}`

Example

`"1.49925Ω"=("20.5V"-"17.5V")/"2.001A"`

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Positive Sequence Impedance for L-G-F Solution

STEP 0: Pre-Calculation Summary

Formula Used

Positive Sequence Impedance LG = (EMF Induced in Primary Winding LG-Positive Sequence Voltage LG)/Positive Sequence Current LG
Z_1(lg) = (E_1(lg)-V_1(lg))/I_1(lg)
This formula uses 4 Variables

Variables Used

Positive Sequence Impedance LG - (Measured in Ohm) - Positive Sequence Impedance LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.
EMF Induced in Primary Winding LG - (Measured in Volt) - EMF Induced in Primary Winding LG is the production of voltage in a coil because of the change in magnetic flux through a coil.
Positive Sequence Voltage LG - (Measured in Volt) - Positive Sequence Voltage LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.
Positive Sequence Current LG - (Measured in Ampere) - Positive Sequence Current LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.

STEP 1: Convert Input(s) to Base Unit

EMF Induced in Primary Winding LG: 20.5 Volt --> 20.5 Volt No Conversion Required
Positive Sequence Voltage LG: 17.5 Volt --> 17.5 Volt No Conversion Required
Positive Sequence Current LG: 2.001 Ampere --> 2.001 Ampere No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Z_1(lg) = (E_1(lg)-V_1(lg))/I_1(lg) --> (20.5-17.5)/2.001

Evaluating ... ...

Z_1(lg) = 1.49925037481259

STEP 3: Convert Result to Output's Unit

1.49925037481259 Ohm --> No Conversion Required

FINAL ANSWER

1.49925037481259 ≈ 1.49925 Ohm <-- Positive Sequence Impedance LG

(Calculation completed in 00.004 seconds)

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Home » Engineering » Electrical » Power System » Fault » Shunt Faults » Unsymmetrical Faults » L-G Fault » Impedance » Positive Sequence Impedance for L-G-F

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< 10+ Impedance Calculators

Positive Sequence Impedance using A-Phase EMF (LGF)

Go Positive Sequence Impedance LG = (EMF Induced in Primary Winding LG/Positive Sequence Current LG)-(3*Fault Impedance LG)-Zero Sequence Impedance LG-Negative Sequence Impedance LG

Negative Sequence Impedance using A-Phase EMF (LGF)

Go Negative Sequence Impedance LG = (EMF Induced in Primary Winding LG/Negative Sequence Current LG)-(3*Fault Impedance LG)-Positive Sequence Impedance LG-Zero Sequence Impedance LG

Zero Sequence Impedance using A-Phase EMF (LGF)

Go Zero Sequence Impedance LG = (EMF Induced in Primary Winding LG/Zero Sequence Current LG)-(3*Fault Impedance LG)-Positive Sequence Impedance LG-Negative Sequence Impedance LG

Fault Impedance given A-Phase EMF and Sequence Impedances(LGF)

Go Fault Impedance LG = 1/3*((A Phase EMF LG/Positive Sequence Current LG)-(Zero Sequence Impedance LG+Positive Sequence Impedance LG+Negative Sequence Impedance LG))

Fault Impedance using Fault Voltage and A-Phase Current(LGF)

Go Fault Impedance LG = Fault Voltage LG/A-Phase Current LG-(1/3*(Zero Sequence Impedance LG+Positive Sequence Impedance LG+Negative Sequence Impedance LG))

Fault Impedance given Sequence Voltages(LGF)

Go Fault Impedance LG = (Zero Sequence Voltage LG+Positive Sequence Voltage LG+Negative Sequence Voltage LG)/(3*Positive Sequence Current LG)

Positive Sequence Impedance for L-G-F

Go Positive Sequence Impedance LG = (EMF Induced in Primary Winding LG-Positive Sequence Voltage LG)/Positive Sequence Current LG

Negative Sequence Impedance for L-G-F

Go Negative Sequence Impedance LG = (-1)*Negative Sequence Voltage LG/Negative Sequence Current LG

Zero Sequence Impedance for L-G-F

Go Zero Sequence Impedance LG = (-1)*Zero Sequence Voltage LG/Zero Sequence Current LG

Fault Impedance using A-Phase Voltage(LGF)

Go Fault Impedance LG = A Phase Voltage LG/A-Phase Current LG

Positive Sequence Impedance for L-G-F Formula

Positive Sequence Impedance LG = (EMF Induced in Primary Winding LG-Positive Sequence Voltage LG)/Positive Sequence Current LG
Z_1(lg) = (E_1(lg)-V_1(lg))/I_1(lg)

What are the Sequence Components?

The positive sequence consists of balanced three-phase voltage and current phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ABC rotation. The negative sequence consists of balanced three-phase voltage and current phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ACB rotation. Zero sequence consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counterclockwise together.

How to Calculate Positive Sequence Impedance for L-G-F?

Positive Sequence Impedance for L-G-F calculator uses Positive Sequence Impedance LG = (EMF Induced in Primary Winding LG-Positive Sequence Voltage LG)/Positive Sequence Current LG to calculate the Positive Sequence Impedance LG, The Positive Sequence Impedance for L-G-F formula is consists of balanced three-phase impedance phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ABC rotation. Positive Sequence Impedance LG is denoted by Z_1(lg) symbol.

How to calculate Positive Sequence Impedance for L-G-F using this online calculator? To use this online calculator for Positive Sequence Impedance for L-G-F, enter EMF Induced in Primary Winding LG (E_1(lg)), Positive Sequence Voltage LG (V_1(lg)) & Positive Sequence Current LG (I_1(lg)) and hit the calculate button. Here is how the Positive Sequence Impedance for L-G-F calculation can be explained with given input values -> 1.49925 = (20.5-17.5)/2.001.

FAQ

What is Positive Sequence Impedance for L-G-F?

The Positive Sequence Impedance for L-G-F formula is consists of balanced three-phase impedance phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ABC rotation and is represented as Z_1(lg) = (E_1(lg)-V_1(lg))/I_1(lg) or Positive Sequence Impedance LG = (EMF Induced in Primary Winding LG-Positive Sequence Voltage LG)/Positive Sequence Current LG. EMF Induced in Primary Winding LG is the production of voltage in a coil because of the change in magnetic flux through a coil, Positive Sequence Voltage LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation & Positive Sequence Current LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.

How to calculate Positive Sequence Impedance for L-G-F?

The Positive Sequence Impedance for L-G-F formula is consists of balanced three-phase impedance phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ABC rotation is calculated using Positive Sequence Impedance LG = (EMF Induced in Primary Winding LG-Positive Sequence Voltage LG)/Positive Sequence Current LG. To calculate Positive Sequence Impedance for L-G-F, you need EMF Induced in Primary Winding LG (E_1(lg)), Positive Sequence Voltage LG (V_1(lg)) & Positive Sequence Current LG (I_1(lg)). With our tool, you need to enter the respective value for EMF Induced in Primary Winding LG, Positive Sequence Voltage LG & Positive Sequence Current LG and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Positive Sequence Impedance LG?

In this formula, Positive Sequence Impedance LG uses EMF Induced in Primary Winding LG, Positive Sequence Voltage LG & Positive Sequence Current LG. We can use 1 other way(s) to calculate the same, which is/are as follows -

Positive Sequence Impedance LG = (EMF Induced in Primary Winding LG/Positive Sequence Current LG)-(3*Fault Impedance LG)-Zero Sequence Impedance LG-Negative Sequence Impedance LG

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