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Positive Sequence Current using Fault Impedance(LGF) Formula

GoPositive Sequence Current using A-Phase Current (LGF) Formula

GoPositive Sequence Current for L-G-F Formula

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

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

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

Positive Sequence Current using Fault Impedance(LGF) Example

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

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

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

11.368 = \frac{17.5 + 16.056 + 17.6}{3 \cdot 1.5}

11.368A = \frac{17.5V + 16.056V + 17.6V}{3 \cdot 1.5Ω}

11.368 = \frac{17.5 + 16.056 + 17.6}{3 \cdot 1.5}

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Positive Sequence Current using Fault Impedance(LGF) Solution

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

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

I 1(lg) = \frac{17.5V + 16.056V + 17.6V}{3 \cdot 1.5Ω}

Next Step Prepare to Evaluate

∴

I 1(lg) = \frac{17.5 + 16.056 + 17.6}{3 \cdot 1.5}

LAST Step Evaluate

∴

I 1(lg) = 11.368A

Positive Sequence Current using Fault Impedance(LGF) Formula Elements

Variables

Positive Sequence Current LG

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

Symbol: I_1(lg)

Measurement: Electric CurrentUnit: A

Note: Value can be positive or negative.

Formulas to find Positive Sequence Current LG

Positive Sequence Voltage LG

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

Symbol: V_1(lg)

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Positive Sequence Voltage LG

Negative Sequence Voltage LG

Negative Sequence Voltage LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB rotation.

Symbol: V_2(lg)

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Negative Sequence Voltage LG

Zero Sequence Voltage LG

Zero Sequence Voltage LG 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(lg)

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Zero Sequence 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

Other Formulas to find Positive Sequence Current LG

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

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

Go Positive Sequence Current for L-G-F

I 1(lg) = \frac{V 1(lg) - E 1(lg)}{Z 1(lg)}

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

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

Other formulas in Current category

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 Negative Sequence Current using A-Phase Current (LGF)

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

How to Evaluate Positive Sequence Current using Fault Impedance(LGF)?

Positive Sequence Current using Fault Impedance(LGF) evaluator uses Positive Sequence Current LG = (Positive Sequence Voltage LG+Negative Sequence Voltage LG+Zero Sequence Voltage LG)/(3*Fault Impedance LG) to evaluate the Positive Sequence Current LG, The Positive Sequence current using fault impedance(LGF) formula is consists of balanced three-phase voltage and current phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ABC rotation. Positive Sequence Current LG is denoted by I_1(lg) symbol.

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

FAQs on Positive Sequence Current using Fault Impedance(LGF)

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

The formula of Positive Sequence Current using Fault Impedance(LGF) is expressed as Positive Sequence Current LG = (Positive Sequence Voltage LG+Negative Sequence Voltage LG+Zero Sequence Voltage LG)/(3*Fault Impedance LG). Here is an example- 11.368 = (17.5+16.056+17.6)/(3*1.5).

How to calculate Positive Sequence Current using Fault Impedance(LGF)?

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

What are the other ways to Calculate Positive Sequence Current LG?

Here are the different ways to Calculate Positive Sequence Current LG-

Positive Sequence Current LG=A-Phase Current LG/3
Positive Sequence Current LG=(Positive Sequence Voltage LG-EMF Induced in Primary Winding LG)/Positive Sequence Impedance LG
Positive Sequence Current LG=A Phase EMF LG/(Zero Sequence Impedance LG+Negative Sequence Impedance LG+Positive Sequence Impedance LG+(3*Fault Impedance LG))

Can the Positive Sequence Current using Fault Impedance(LGF) be negative?

Yes, the Positive Sequence Current using Fault Impedance(LGF), measured in Electric Current can be negative.

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

Positive Sequence Current using 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 Positive Sequence Current using Fault Impedance(LGF) can be measured.

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Positive Sequence Current using Fault Impedance(LGF) Formula

​GoPositive Sequence Current using A-Phase Current (LGF) Formula

​GoPositive Sequence Current for L-G-F Formula

Positive Sequence Current using Fault Impedance(LGF) Example

Positive Sequence Current using Fault Impedance(LGF) Solution

Positive Sequence Current using Fault Impedance(LGF) Formula Elements

Other Formulas to find Positive Sequence Current LG

Other formulas in Current category

How to Evaluate Positive Sequence Current using Fault Impedance(LGF)?

FAQs on Positive Sequence Current using Fault Impedance(LGF)

Variable Name

GoPositive Sequence Current using A-Phase Current (LGF) Formula

GoPositive Sequence Current for L-G-F Formula