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

GoA-Phase Current using Positive Sequence Current (LGF) Formula

GoA-Phase Current using Negative Sequence Current (LGF) Formula

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

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

I_a(lg) - A-Phase Current LG?V_f(lg) - Fault Voltage LG?Z_f(lg) - Fault Impedance LG?Z_0(lg) - Zero Sequence Impedance LG?Z_1(lg) - Positive Sequence Impedance LG?Z_2(lg) - Negative Sequence Impedance LG?

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

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Here is how the A-Phase Current using Fault Voltage and Fault Impedance(LGF) equation looks like with Values.

Here is how the A-Phase Current using Fault Voltage and Fault Impedance(LGF) equation looks like with Units.

Here is how the A-Phase Current using Fault Voltage and Fault Impedance(LGF) equation looks like.

-1.9247 = \frac{15.5}{1.5 + ((\frac{1}{3}) \cdot (8 + 7.94 + -44.6))}

-1.9247A = \frac{15.5V}{1.5Ω + ((\frac{1}{3}) \cdot (8Ω + 7.94Ω + -44.6Ω))}

-1.9247 = \frac{15.5}{1.5 + ((\frac{1}{3}) \cdot (8 + 7.94 + -44.6))}

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

Follow our step by step solution on how to calculate A-Phase Current using Fault Voltage and Fault Impedance(LGF)?

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

I a(lg) = \frac{15.5V}{1.5Ω + ((\frac{1}{3}) \cdot (8Ω + 7.94Ω + -44.6Ω))}

Next Step Prepare to Evaluate

∴

I a(lg) = \frac{15.5}{1.5 + ((\frac{1}{3}) \cdot (8 + 7.94 + -44.6))}

Next Step Evaluate

∴

I a(lg) = -1.92466887417219A

LAST Step Rounding Answer

∴

I a(lg) = -1.9247A

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

Variables

A-Phase Current LG

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

Symbol: I_a(lg)

Measurement: Electric CurrentUnit: A

Note: Value can be positive or negative.

Formulas to find A-Phase Current LG

Fault Voltage LG

Fault Voltage LG is defined when an electrical fault occurs and results in the deviation of voltage.

Symbol: V_f(lg)

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Fault Voltage LG

Fault Impedance LG

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.

Symbol: Z_f(lg)

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Fault Impedance LG

Zero Sequence Impedance LG

Zero Sequence Impedance LG consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counter clockwise together.

Symbol: Z_0(lg)

Measurement: Electric ResistanceUnit: Ω

Note: Value can be positive or negative.

Formulas to find Zero Sequence Impedance LG

Positive Sequence Impedance LG

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.

Symbol: Z_1(lg)

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Positive Sequence Impedance LG

Negative Sequence Impedance LG

Negative Sequence Impedance LG consists of balanced three-phase impedance phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB rotation.

Symbol: Z_2(lg)

Measurement: Electric ResistanceUnit: Ω

Note: Value can be positive or negative.

Formulas to find Negative Sequence Impedance LG

Other Formulas to find A-Phase Current LG

Go A-Phase Current using Positive Sequence Current (LGF)

I a(lg) = I 1(lg) \cdot 3

Go A-Phase Current using Negative Sequence Current (LGF)

I a(lg) = 3 \cdot I 2(lg)

Go A-Phase Current using Zero Sequence Current (LGF)

I a(lg) = I 0(lg) \cdot 3

Go A-Phase Current using A-Phase Voltage(LGF)

I a(lg) = \frac{V a(lg)}{Z f(lg)}

Other formulas in Current category

Go Positive Sequence Current using Fault Impedance(LGF)

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

Go Positive Sequence Current using A-Phase Current (LGF)

I 1(lg) = \frac{I a(lg)}{3}

Go Negative Sequence Current using A-Phase Current (LGF)

I 2(lg) = \frac{I a(lg)}{3}

Go Zero Sequence Current using A-Phase Current (LGF)

I 0(lg) = \frac{I a(lg)}{3}

How to Evaluate A-Phase Current using Fault Voltage and Fault Impedance(LGF)?

A-Phase Current using Fault Voltage and Fault Impedance(LGF) evaluator uses A-Phase Current LG = Fault Voltage LG/(Fault Impedance LG+((1/3)*(Zero Sequence Impedance LG+Positive Sequence Impedance LG+Negative Sequence Impedance LG))) to evaluate the A-Phase Current LG, The A-phase current using Fault voltage and Fault Impedance(LGF) formula is defined as the current through any one component comprising a three-phase source or load. here we have taken the a-phase. A-Phase Current LG is denoted by I_a(lg) symbol.

How to evaluate A-Phase Current using Fault Voltage and Fault Impedance(LGF) using this online evaluator? To use this online evaluator for A-Phase Current using Fault Voltage and Fault Impedance(LGF), enter Fault Voltage LG (V_f(lg)), Fault Impedance LG (Z_f(lg)), Zero Sequence Impedance LG (Z_0(lg)), Positive Sequence Impedance LG (Z_1(lg)) & Negative Sequence Impedance LG (Z_2(lg)) and hit the calculate button.

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

What is the formula to find A-Phase Current using Fault Voltage and Fault Impedance(LGF)?

The formula of A-Phase Current using Fault Voltage and Fault Impedance(LGF) is expressed as A-Phase Current LG = Fault Voltage LG/(Fault Impedance LG+((1/3)*(Zero Sequence Impedance LG+Positive Sequence Impedance LG+Negative Sequence Impedance LG))). Here is an example- -1.924669 = 15.5/(1.5+((1/3)*(8+7.94+(-44.6)))).

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

With Fault Voltage LG (V_f(lg)), Fault Impedance LG (Z_f(lg)), Zero Sequence Impedance LG (Z_0(lg)), Positive Sequence Impedance LG (Z_1(lg)) & Negative Sequence Impedance LG (Z_2(lg)) we can find A-Phase Current using Fault Voltage and Fault Impedance(LGF) using the formula - A-Phase Current LG = Fault Voltage LG/(Fault Impedance LG+((1/3)*(Zero Sequence Impedance LG+Positive Sequence Impedance LG+Negative Sequence Impedance LG))).

What are the other ways to Calculate A-Phase Current LG?

Here are the different ways to Calculate A-Phase Current LG-

A-Phase Current LG=Positive Sequence Current LG*3
A-Phase Current LG=3*Negative Sequence Current LG
A-Phase Current LG=Zero Sequence Current LG*3

Can the A-Phase Current using Fault Voltage and Fault Impedance(LGF) be negative?

Yes, the A-Phase Current using Fault Voltage and Fault Impedance(LGF), measured in Electric Current can be negative.

Which unit is used to measure A-Phase Current using Fault Voltage and Fault Impedance(LGF)?

A-Phase Current using Fault Voltage and Fault Impedance(LGF) is usually measured using the Ampere[A] for Electric Current. Milliampere[A], Microampere[A], Centiampere[A] are the few other units in which A-Phase Current using Fault Voltage and Fault Impedance(LGF) can be measured.

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

​GoA-Phase Current using Positive Sequence Current (LGF) Formula

​GoA-Phase Current using Negative Sequence Current (LGF) Formula

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

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

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

Other Formulas to find A-Phase Current LG

Other formulas in Current category

How to Evaluate A-Phase Current using Fault Voltage and Fault Impedance(LGF)?

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

Variable Name

GoA-Phase Current using Positive Sequence Current (LGF) Formula

GoA-Phase Current using Negative Sequence Current (LGF) Formula