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Fault Impedance using Positive Sequence Current Formula

GoFault Impedance using A-Phase Current Formula

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Fault Impedance Line is defined as the impedance that caused the fault. Check FAQs

Z f(line) = \frac{V 1(line) + V 2(line) + V 0(line)}{3 \cdot I 1(line)}

Z_f(line) - Fault Impedance Line?V_1(line) - Positive Sequence Voltage Line?V_2(line) - Negative Sequence Voltage Line?V_0(line) - Zero Sequence Voltage Line?I_1(line) - Positive Sequence Current Line?

Fault Impedance using Positive Sequence Current Example

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Here is how the Fault Impedance using Positive Sequence Current equation looks like with Values.

Here is how the Fault Impedance using Positive Sequence Current equation looks like with Units.

Here is how the Fault Impedance using Positive Sequence Current equation looks like.

7.84 = \frac{13.51 + 16.056 + 17.5}{3 \cdot 2.0011}

7.84Ω = \frac{13.51V + 16.056V + 17.5V}{3 \cdot 2.0011A}

7.84 = \frac{13.51 + 16.056 + 17.5}{3 \cdot 2.0011}

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Fault Impedance using Positive Sequence Current Solution

Follow our step by step solution on how to calculate Fault Impedance using Positive Sequence Current?

FIRST Step Consider the formula

Z f(line) = \frac{V 1(line) + V 2(line) + V 0(line)}{3 \cdot I 1(line)}

Next Step Substitute values of Variables

∴

Z f(line) = \frac{13.51V + 16.056V + 17.5V}{3 \cdot 2.0011A}

Next Step Prepare to Evaluate

∴

Z f(line) = \frac{13.51 + 16.056 + 17.5}{3 \cdot 2.0011}

Next Step Evaluate

∴

Z f(line) = 7.84002132160645Ω

LAST Step Rounding Answer

∴

Z f(line) = 7.84Ω

Fault Impedance using Positive Sequence Current Formula Elements

Variables

Fault Impedance Line

Fault Impedance Line is defined as the impedance that caused the fault.

Symbol: Z_f(line)

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Fault Impedance Line

Positive Sequence Voltage 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.

Symbol: V_1(line)

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Positive Sequence Voltage Line

Negative Sequence Voltage Line

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.

Symbol: V_2(line)

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Negative Sequence Voltage Line

Zero Sequence Voltage Line

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.

Symbol: V_0(line)

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Zero Sequence Voltage Line

Positive Sequence Current Line

Positive Sequence Current Line is consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.

Symbol: I_1(line)

Measurement: Electric CurrentUnit: A

Note: Value should be greater than 0.

Formulas to find Positive Sequence Current Line

Other Formulas to find Fault Impedance Line

Go Fault Impedance using A-Phase Current

Z f(line) = \frac{V 1(line) + V 2(line) + V 0(line)}{I a(line)}

Other formulas in Line Sequence Impedance category

Go Zero Sequence Impedance for Star Connected Load

Z 0S(line) = Z s(line) + (3 \cdot Z f(line))

Go Positive Sequence Impedance for Delta Connected Load

Z 1(line) = \frac{V 1(line)}{I 1(line)}

Go Negative Sequence Impedance for Delta Connected Load

Z 2(line) = \frac{V 2(line)}{I 2(line)}

Go Zero Sequence Impedance for Delta Connected Load

Z 0D(line) = \frac{V 0(line)}{I 0(line)}

How to Evaluate Fault Impedance using Positive Sequence Current?

Fault Impedance using Positive Sequence Current evaluator uses Fault Impedance Line = (Positive Sequence Voltage Line+Negative Sequence Voltage Line+Zero Sequence Voltage Line)/(3*Positive Sequence Current Line) to evaluate the Fault Impedance Line, The Fault impedance using positive Sequence current formula is defined as the impedance which is connected to the earth. Fault Impedance Line is denoted by Z_f(line) symbol.

How to evaluate Fault Impedance using Positive Sequence Current using this online evaluator? To use this online evaluator for Fault Impedance using Positive Sequence Current, enter Positive Sequence Voltage Line (V_1(line)), Negative Sequence Voltage Line (V_2(line)), Zero Sequence Voltage Line (V_0(line)) & Positive Sequence Current Line (I_1(line)) and hit the calculate button.

FAQs on Fault Impedance using Positive Sequence Current

What is the formula to find Fault Impedance using Positive Sequence Current?

The formula of Fault Impedance using Positive Sequence Current is expressed as Fault Impedance Line = (Positive Sequence Voltage Line+Negative Sequence Voltage Line+Zero Sequence Voltage Line)/(3*Positive Sequence Current Line). Here is an example- 7.840021 = (13.51+16.056+17.5)/(3*2.0011).

How to calculate Fault Impedance using Positive Sequence Current?

With Positive Sequence Voltage Line (V_1(line)), Negative Sequence Voltage Line (V_2(line)), Zero Sequence Voltage Line (V_0(line)) & Positive Sequence Current Line (I_1(line)) we can find Fault Impedance using Positive Sequence Current using the formula - Fault Impedance Line = (Positive Sequence Voltage Line+Negative Sequence Voltage Line+Zero Sequence Voltage Line)/(3*Positive Sequence Current Line).

What are the other ways to Calculate Fault Impedance Line?

Here are the different ways to Calculate Fault Impedance Line-

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

Can the Fault Impedance using Positive Sequence Current be negative?

No, the Fault Impedance using Positive Sequence Current, measured in Electric Resistance cannot be negative.

Which unit is used to measure Fault Impedance using Positive Sequence Current?

Fault Impedance using Positive Sequence Current is usually measured using the Ohm[Ω] for Electric Resistance. Megohm[Ω], Microhm[Ω], Volt per Ampere[Ω] are the few other units in which Fault Impedance using Positive Sequence Current can be measured.

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Fault Impedance using Positive Sequence Current Formula

​GoFault Impedance using A-Phase Current Formula

Fault Impedance using Positive Sequence Current Example

Fault Impedance using Positive Sequence Current Solution

Fault Impedance using Positive Sequence Current Formula Elements

Other Formulas to find Fault Impedance Line

Other formulas in Line Sequence Impedance category

How to Evaluate Fault Impedance using Positive Sequence Current?

FAQs on Fault Impedance using Positive Sequence Current

Variable Name

GoFault Impedance using A-Phase Current Formula