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Fault Impedance using A-Phase Current Formula

GoFault Impedance using Positive Sequence 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)}{I a(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_a(line) - A-Phase Current Line?

Fault Impedance using A-Phase Current Example

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Here is how the Fault Impedance using A-Phase Current equation looks like with Values.

Here is how the Fault Impedance using A-Phase Current equation looks like with Units.

Here is how the Fault Impedance using A-Phase Current equation looks like.

7.8313 = \frac{13.51 + 16.056 + 17.5}{6.01}

7.8313Ω = \frac{13.51V + 16.056V + 17.5V}{6.01A}

7.8313 = \frac{13.51 + 16.056 + 17.5}{6.01}

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Fault Impedance using A-Phase Current Solution

Follow our step by step solution on how to calculate Fault Impedance using A-Phase Current?

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

Z f(line) = \frac{13.51V + 16.056V + 17.5V}{6.01A}

Next Step Prepare to Evaluate

∴

Z f(line) = \frac{13.51 + 16.056 + 17.5}{6.01}

Next Step Evaluate

∴

Z f(line) = 7.83128119800333Ω

LAST Step Rounding Answer

∴

Z f(line) = 7.8313Ω

Fault Impedance using A-Phase 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

A-Phase Current Line

A-phase Current Line is the current that flows into the a-phase in open conductor fault.

Symbol: I_a(line)

Measurement: Electric CurrentUnit: A

Note: Value can be positive or negative.

Formulas to find A-Phase Current Line

Other Formulas to find Fault Impedance Line

Go Fault Impedance using Positive Sequence Current

Z f(line) = \frac{V 1(line) + V 2(line) + V 0(line)}{3 \cdot I 1(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 A-Phase Current?

Fault Impedance using A-Phase Current evaluator uses Fault Impedance Line = (Positive Sequence Voltage Line+Negative Sequence Voltage Line+Zero Sequence Voltage Line)/A-Phase Current Line to evaluate 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 evaluate Fault Impedance using A-Phase Current using this online evaluator? To use this online evaluator 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.

FAQs on Fault Impedance using A-Phase Current

What is the formula to find Fault Impedance using A-Phase Current?

The formula of Fault Impedance using A-Phase Current is expressed as Fault Impedance Line = (Positive Sequence Voltage Line+Negative Sequence Voltage Line+Zero Sequence Voltage Line)/A-Phase Current Line. Here is an example- 7.831281 = (13.51+16.056+17.5)/6.01.

How to calculate Fault Impedance using A-Phase Current?

With 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)) we can find Fault Impedance using A-Phase Current using the formula - Fault Impedance Line = (Positive Sequence Voltage Line+Negative Sequence Voltage Line+Zero Sequence Voltage Line)/A-Phase 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)/(3*Positive Sequence Current Line)

Can the Fault Impedance using A-Phase Current be negative?

No, the Fault Impedance using A-Phase Current, measured in Electric Resistance cannot be negative.

Which unit is used to measure Fault Impedance using A-Phase Current?

Fault Impedance using A-Phase 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 A-Phase Current can be measured.

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Fault Impedance using A-Phase Current Formula

​GoFault Impedance using Positive Sequence Current Formula

Fault Impedance using A-Phase Current Example

Fault Impedance using A-Phase Current Solution

Fault Impedance using A-Phase Current Formula Elements

Other Formulas to find Fault Impedance Line

Other formulas in Line Sequence Impedance category

How to Evaluate Fault Impedance using A-Phase Current?

FAQs on Fault Impedance using A-Phase Current

Variable Name

GoFault Impedance using Positive Sequence Current Formula