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Positive Sequence Voltage using Fault Impedance (LLGF) Formula

GoPositive Sequence Voltage using A-Phase EMF(LLGF) Formula

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

V 1 = V 0 - (3 \cdot Z f \cdot I 0)

V₁ - Positive Sequence Voltage?V₀ - Zero Sequence Voltage?Z_f - Fault Impedance?I₀ - Zero Sequence Current?

Positive Sequence Voltage using Fault Impedance (LLGF) Example

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

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

Here is how the Positive Sequence Voltage using Fault Impedance (LLGF) equation looks like.

7.7 = 17.6 - (3 \cdot 1.5 \cdot 2.2)

7.7V = 17.6V - (3 \cdot 1.5Ω \cdot 2.2A)

7.7 = 17.6 - (3 \cdot 1.5 \cdot 2.2)

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Positive Sequence Voltage using Fault Impedance (LLGF) Solution

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

FIRST Step Consider the formula

V 1 = V 0 - (3 \cdot Z f \cdot I 0)

Next Step Substitute values of Variables

∴

V 1 = 17.6V - (3 \cdot 1.5Ω \cdot 2.2A)

Next Step Prepare to Evaluate

∴

V 1 = 17.6 - (3 \cdot 1.5 \cdot 2.2)

LAST Step Evaluate

∴

V 1 = 7.7V

Positive Sequence Voltage using Fault Impedance (LLGF) Formula Elements

Variables

Positive Sequence Voltage

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

Symbol: V₁

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Positive Sequence Voltage

Zero Sequence Voltage

Zero Sequence Voltage consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counterclockwise together.

Symbol: V₀

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Zero Sequence Voltage

Fault Impedance

Fault Impedance 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

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Fault Impedance

Zero Sequence Current

Zero Sequence Current consists of a balanced three-phase current, phasors of which all have the same phase angles and rotate counterclockwise together.

Symbol: I₀

Measurement: Electric CurrentUnit: A

Note: Value can be positive or negative.

Formulas to find Zero Sequence Current

Other Formulas to find Positive Sequence Voltage

Go Positive Sequence Voltage using A-Phase EMF(LLGF)

V 1 = E a - Z 1 \cdot I 1

Other formulas in Voltage and EMF category

Go B-Phase Voltage using Fault Current (LLGF)

V b = Z f \cdot I f

Go C-Phase Voltage using Fault Current (LLGF)

V c = I f \cdot Z f

Go B-Phase Voltage using Zero Sequence Current (LLGF)

V b = 3 \cdot I 0 \cdot Z f

Go C-Phase Voltage using Zero Sequence Current (LLGF)

V c = 3 \cdot I 0 \cdot Z f

How to Evaluate Positive Sequence Voltage using Fault Impedance (LLGF)?

Positive Sequence Voltage using Fault Impedance (LLGF) evaluator uses Positive Sequence Voltage = Zero Sequence Voltage-(3*Fault Impedance*Zero Sequence Current) to evaluate the Positive Sequence Voltage, The Positive Sequence voltage using fault impedance (LLGF) 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 Voltage is denoted by V₁ symbol.

How to evaluate Positive Sequence Voltage using Fault Impedance (LLGF) using this online evaluator? To use this online evaluator for Positive Sequence Voltage using Fault Impedance (LLGF), enter Zero Sequence Voltage (V₀), Fault Impedance (Z_f) & Zero Sequence Current (I₀) and hit the calculate button.

FAQs on Positive Sequence Voltage using Fault Impedance (LLGF)

What is the formula to find Positive Sequence Voltage using Fault Impedance (LLGF)?

The formula of Positive Sequence Voltage using Fault Impedance (LLGF) is expressed as Positive Sequence Voltage = Zero Sequence Voltage-(3*Fault Impedance*Zero Sequence Current). Here is an example- 7.7 = 17.6-(3*1.5*2.2).

How to calculate Positive Sequence Voltage using Fault Impedance (LLGF)?

With Zero Sequence Voltage (V₀), Fault Impedance (Z_f) & Zero Sequence Current (I₀) we can find Positive Sequence Voltage using Fault Impedance (LLGF) using the formula - Positive Sequence Voltage = Zero Sequence Voltage-(3*Fault Impedance*Zero Sequence Current).

What are the other ways to Calculate Positive Sequence Voltage?

Here are the different ways to Calculate Positive Sequence Voltage-

Positive Sequence Voltage=A Phase EMF-Positive Sequence Impedance*Positive Sequence Current

Can the Positive Sequence Voltage using Fault Impedance (LLGF) be negative?

No, the Positive Sequence Voltage using Fault Impedance (LLGF), measured in Electric Potential cannot be negative.

Which unit is used to measure Positive Sequence Voltage using Fault Impedance (LLGF)?

Positive Sequence Voltage using Fault Impedance (LLGF) is usually measured using the Volt[V] for Electric Potential. Millivolt[V], Microvolt[V], Nanovolt[V] are the few other units in which Positive Sequence Voltage using Fault Impedance (LLGF) can be measured.

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