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Positive Sequence Voltage (LLF) Formula

GoPositive Sequence Voltage using A-Phase EMF and Positive Sequence Current(LLF) Formula

GoPositive Sequence Voltage using A-Phase EMF and Sequence Impedances(LLF) 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 = (Z f \cdot I 1) + V 2

V₁ - Positive Sequence Voltage?Z_f - Fault Impedance?I₁ - Positive Sequence Current?V₂ - Negative Sequence Voltage?

Positive Sequence Voltage (LLF) Example

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Here is how the Positive Sequence Voltage (LLF) equation looks like with Values.

Here is how the Positive Sequence Voltage (LLF) equation looks like with Units.

Here is how the Positive Sequence Voltage (LLF) equation looks like.

19.0575 = (1.5 \cdot 2.001) + 16.056

19.0575V = (1.5Ω \cdot 2.001A) + 16.056V

19.0575 = (1.5 \cdot 2.001) + 16.056

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Positive Sequence Voltage (LLF) Solution

Follow our step by step solution on how to calculate Positive Sequence Voltage (LLF)?

FIRST Step Consider the formula

V 1 = (Z f \cdot I 1) + V 2

Next Step Substitute values of Variables

∴

V 1 = (1.5Ω \cdot 2.001A) + 16.056V

Next Step Prepare to Evaluate

∴

V 1 = (1.5 \cdot 2.001) + 16.056

LAST Step Evaluate

∴

V 1 = 19.0575V

Positive Sequence Voltage (LLF) 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

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

Positive Sequence Current

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

Symbol: I₁

Measurement: Electric CurrentUnit: A

Note: Value can be positive or negative.

Formulas to find Positive Sequence Current

Negative Sequence Voltage

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

Symbol: V₂

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Negative Sequence Voltage

Other Formulas to find Positive Sequence Voltage

Go Positive Sequence Voltage using A-Phase EMF and Positive Sequence Current(LLF)

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

Go Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LLF)

V 1 = \frac{E a \cdot Z 2}{Z 1 + Z 2}

Other formulas in Voltage and EMF category

Go B-Phase Voltage (LLF)

V b = (Z f \cdot I b) + V c

Go C-Phase Voltage (LLF)

V c = V b - (Z f \cdot I b)

Go C-Phase Voltage using C-Phase Current (LLF)

V c = V b + (Z f \cdot I c)

Go B-Phase Voltage using C-Phase Current (LLF)

V b = V c - (Z f \cdot I c)

How to Evaluate Positive Sequence Voltage (LLF)?

Positive Sequence Voltage (LLF) evaluator uses Positive Sequence Voltage = (Fault Impedance*Positive Sequence Current)+Negative Sequence Voltage to evaluate the Positive Sequence Voltage, The Positive Sequence Voltage (LLF) 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 (LLF) using this online evaluator? To use this online evaluator for Positive Sequence Voltage (LLF), enter Fault Impedance (Z_f), Positive Sequence Current (I₁) & Negative Sequence Voltage (V₂) and hit the calculate button.

FAQs on Positive Sequence Voltage (LLF)

What is the formula to find Positive Sequence Voltage (LLF)?

The formula of Positive Sequence Voltage (LLF) is expressed as Positive Sequence Voltage = (Fault Impedance*Positive Sequence Current)+Negative Sequence Voltage. Here is an example- 19.0575 = (1.5*2.001)+16.056.

How to calculate Positive Sequence Voltage (LLF)?

With Fault Impedance (Z_f), Positive Sequence Current (I₁) & Negative Sequence Voltage (V₂) we can find Positive Sequence Voltage (LLF) using the formula - Positive Sequence Voltage = (Fault Impedance*Positive Sequence Current)+Negative Sequence Voltage.

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
Positive Sequence Voltage=(A Phase EMF*Negative Sequence Impedance)/(Positive Sequence Impedance+Negative Sequence Impedance)

Can the Positive Sequence Voltage (LLF) be negative?

No, the Positive Sequence Voltage (LLF), measured in Electric Potential cannot be negative.

Which unit is used to measure Positive Sequence Voltage (LLF)?

Positive Sequence Voltage (LLF) 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 (LLF) can be measured.

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