Fault Impedance using A-Phase Current Calculator

✖Positive Sequence Voltage Line is consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.ⓘ Positive Sequence Voltage Line [V_1(line)]			+10% -10%
✖Negative Sequence Voltage Line is consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB rotation.ⓘ Negative Sequence Voltage Line [V_2(line)]			+10% -10%
✖Zero Sequence Voltage Line is 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 Line [V_0(line)]			+10% -10%
✖A-phase Current Line is the current that flows into the a-phase in open conductor fault.ⓘ A-Phase Current Line [I_a(line)]			+10% -10%

✖Fault Impedance Line is defined as the impedance that caused the fault.ⓘ Fault Impedance using A-Phase Current [Z_f(line)]

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Formula

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Fault Impedance using A-Phase Current

Formula

`"Z"_{"f(line)"} = ("V"_{"1(line)"}+"V"_{"2(line)"}+"V"_{"0(line)"})/"I"_{"a(line)"}`

Example

`"7.831281Ω"=("13.51V"+"16.056V"+"17.5V")/"6.01A"`

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Fault Impedance using A-Phase Current Solution

STEP 0: Pre-Calculation Summary

Formula Used

Fault Impedance Line = (Positive Sequence Voltage Line+Negative Sequence Voltage Line+Zero Sequence Voltage Line)/A-Phase Current Line
Z_f(line) = (V_1(line)+V_2(line)+V_0(line))/I_a(line)
This formula uses 5 Variables

Variables Used

Fault Impedance Line - (Measured in Ohm) - Fault Impedance Line is defined as the impedance that caused the fault.
Positive Sequence Voltage Line - (Measured in Volt) - Positive Sequence Voltage Line is consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.
Negative Sequence Voltage Line - (Measured in Volt) - Negative Sequence Voltage Line is consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB rotation.
Zero Sequence Voltage Line - (Measured in Volt) - Zero Sequence Voltage Line is consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counterclockwise together.
A-Phase Current Line - (Measured in Ampere) - A-phase Current Line is the current that flows into the a-phase in open conductor fault.

STEP 1: Convert Input(s) to Base Unit

Positive Sequence Voltage Line: 13.51 Volt --> 13.51 Volt No Conversion Required
Negative Sequence Voltage Line: 16.056 Volt --> 16.056 Volt No Conversion Required
Zero Sequence Voltage Line: 17.5 Volt --> 17.5 Volt No Conversion Required
A-Phase Current Line: 6.01 Ampere --> 6.01 Ampere No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Z_f(line) = (V_1(line)+V_2(line)+V_0(line))/I_a(line) --> (13.51+16.056+17.5)/6.01

Evaluating ... ...

Z_f(line) = 7.83128119800333

STEP 3: Convert Result to Output's Unit

7.83128119800333 Ohm --> No Conversion Required

FINAL ANSWER

7.83128119800333 ≈ 7.831281 Ohm <-- Fault Impedance Line

(Calculation completed in 00.004 seconds)

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< 7 Line Sequence Impedance Calculators

Fault Impedance using Positive Sequence Current

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

Fault Impedance using A-Phase Current

Go Fault Impedance Line = (Positive Sequence Voltage Line+Negative Sequence Voltage Line+Zero Sequence Voltage Line)/A-Phase Current Line

Positive Sequence Impedance for Delta Connected Load

Go Positive Sequence Impedance Line = Positive Sequence Voltage Line/Positive Sequence Current Line

Negative Sequence Impedance for Delta Connected Load

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

Sequence Impedance

Go Sequence Impedance Line = Symmetric Component Voltage Line/Symmetric Component Current Line

Zero Sequence Impedance for Delta Connected Load

Go Zero Sequence Impedance Delta Line = Zero Sequence Voltage Line/Zero Sequence Current Line

Zero Sequence Impedance for Star Connected Load

Go Zero Sequence Impedance Star Line = Sequence Impedance Line+(3*Fault Impedance Line)

Fault Impedance using A-Phase Current Formula

Fault Impedance Line = (Positive Sequence Voltage Line+Negative Sequence Voltage Line+Zero Sequence Voltage Line)/A-Phase Current Line
Z_f(line) = (V_1(line)+V_2(line)+V_0(line))/I_a(line)

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 Current?

Fault Impedance using A-Phase Current calculator uses Fault Impedance Line = (Positive Sequence Voltage Line+Negative Sequence Voltage Line+Zero Sequence Voltage Line)/A-Phase Current Line to calculate the Fault Impedance Line, The Fault Impedance using a-phase current formula is defined as the impedence of the path followed by fault current when a low impedance fault occurs between the phase conductor and earth. Fault Impedance Line is denoted by Z_f(line) symbol.

How to calculate Fault Impedance using A-Phase Current using this online calculator? To use this online calculator for Fault Impedance using A-Phase Current, enter Positive Sequence Voltage Line (V_1(line)), Negative Sequence Voltage Line (V_2(line)), Zero Sequence Voltage Line (V_0(line)) & A-Phase Current Line (I_a(line)) and hit the calculate button. Here is how the Fault Impedance using A-Phase Current calculation can be explained with given input values -> 7.831281 = (13.51+16.056+17.5)/6.01.

FAQ

What is Fault Impedance using A-Phase Current?

The Fault Impedance using a-phase current formula is defined as the impedence of the path followed by fault current when a low impedance fault occurs between the phase conductor and earth and is represented as Z_f(line) = (V_1(line)+V_2(line)+V_0(line))/I_a(line) or Fault Impedance Line = (Positive Sequence Voltage Line+Negative Sequence Voltage Line+Zero Sequence Voltage Line)/A-Phase Current Line. Positive Sequence Voltage Line is consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation, Negative Sequence Voltage Line is consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB rotation, Zero Sequence Voltage Line is consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counterclockwise together & A-phase Current Line is the current that flows into the a-phase in open conductor fault.

How to calculate Fault Impedance using A-Phase Current?

The Fault Impedance using a-phase current formula is defined as the impedence of the path followed by fault current when a low impedance fault occurs between the phase conductor and earth is calculated using Fault Impedance Line = (Positive Sequence Voltage Line+Negative Sequence Voltage Line+Zero Sequence Voltage Line)/A-Phase Current Line. To calculate Fault Impedance using A-Phase Current, you need Positive Sequence Voltage Line (V_1(line)), Negative Sequence Voltage Line (V_2(line)), Zero Sequence Voltage Line (V_0(line)) & A-Phase Current Line (I_a(line)). With our tool, you need to enter the respective value for Positive Sequence Voltage Line, Negative Sequence Voltage Line, Zero Sequence Voltage Line & A-Phase Current Line 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 Line?

In this formula, Fault Impedance Line uses Positive Sequence Voltage Line, Negative Sequence Voltage Line, Zero Sequence Voltage Line & A-Phase Current Line. We can use 1 other way(s) to calculate the same, which is/are as follows -

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

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