Fault Impedance using A-Phase Voltage(LGF) Calculator

✖A phase voltage LG is the voltage of a-phase in open conductor fault.ⓘ A Phase Voltage LG [V_a(lg)]			+10% -10%
✖A-phase Current LG is the current that flows into the a-phase in open conductor fault.ⓘ A-Phase Current LG [I_a(lg)]			+10% -10%

✖Fault Impedance LG is a measure of the resistance and reactance in an electrical circuit that is used to calculate the fault current that flows through the circuit in the event of a fault.ⓘ Fault Impedance using A-Phase Voltage(LGF) [Z_f(lg)]

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Formula

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Fault Impedance using A-Phase Voltage(LGF)

Formula

`"Z"_{"f(lg)"} = "V"_{"a(lg)"}/"I"_{"a(lg)"}`

Example

`"5.610329Ω"="11.95V"/"2.13A"`

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Fault Impedance using A-Phase Voltage(LGF) Solution

STEP 0: Pre-Calculation Summary

Formula Used

Fault Impedance LG = A Phase Voltage LG/A-Phase Current LG
Z_f(lg) = V_a(lg)/I_a(lg)
This formula uses 3 Variables

Variables Used

Fault Impedance LG - (Measured in Ohm) - Fault Impedance LG is a measure of the resistance and reactance in an electrical circuit that is used to calculate the fault current that flows through the circuit in the event of a fault.
A Phase Voltage LG - (Measured in Volt) - A phase voltage LG is the voltage of a-phase in open conductor fault.
A-Phase Current LG - (Measured in Ampere) - A-phase Current LG is the current that flows into the a-phase in open conductor fault.

STEP 1: Convert Input(s) to Base Unit

A Phase Voltage LG: 11.95 Volt --> 11.95 Volt No Conversion Required
A-Phase Current LG: 2.13 Ampere --> 2.13 Ampere No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Z_f(lg) = V_a(lg)/I_a(lg) --> 11.95/2.13

Evaluating ... ...

Z_f(lg) = 5.61032863849765

STEP 3: Convert Result to Output's Unit

5.61032863849765 Ohm --> No Conversion Required

FINAL ANSWER

5.61032863849765 ≈ 5.610329 Ohm <-- Fault Impedance LG

(Calculation completed in 00.004 seconds)

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Created by Urvi Rathod

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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

Fault Impedance using A-Phase Voltage(LGF) Formula

Fault Impedance LG = A Phase Voltage LG/A-Phase Current LG
Z_f(lg) = V_a(lg)/I_a(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 Fault Impedance using A-Phase Voltage(LGF)?

Fault Impedance using A-Phase Voltage(LGF) calculator uses Fault Impedance LG = A Phase Voltage LG/A-Phase Current LG to calculate the Fault Impedance LG, The Fault Impedance using a-phase voltage(LGF) formula is defined as the impedance which is connected to the earth. Fault Impedance LG is denoted by Z_f(lg) symbol.

How to calculate Fault Impedance using A-Phase Voltage(LGF) using this online calculator? To use this online calculator for Fault Impedance using A-Phase Voltage(LGF), enter A Phase Voltage LG (V_a(lg)) & A-Phase Current LG (I_a(lg)) and hit the calculate button. Here is how the Fault Impedance using A-Phase Voltage(LGF) calculation can be explained with given input values -> 5.610329 = 11.95/2.13.

FAQ

What is Fault Impedance using A-Phase Voltage(LGF)?

The Fault Impedance using a-phase voltage(LGF) formula is defined as the impedance which is connected to the earth and is represented as Z_f(lg) = V_a(lg)/I_a(lg) or Fault Impedance LG = A Phase Voltage LG/A-Phase Current LG. A phase voltage LG is the voltage of a-phase in open conductor fault & A-phase Current LG is the current that flows into the a-phase in open conductor fault.

How to calculate Fault Impedance using A-Phase Voltage(LGF)?

The Fault Impedance using a-phase voltage(LGF) formula is defined as the impedance which is connected to the earth is calculated using Fault Impedance LG = A Phase Voltage LG/A-Phase Current LG. To calculate Fault Impedance using A-Phase Voltage(LGF), you need A Phase Voltage LG (V_a(lg)) & A-Phase Current LG (I_a(lg)). With our tool, you need to enter the respective value for A Phase Voltage LG & A-Phase 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 Fault Impedance LG?

In this formula, Fault Impedance LG uses A Phase Voltage LG & A-Phase Current LG. We can use 3 other way(s) to calculate the same, which is/are as follows -

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

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