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

GoPositive Sequence Current (LLF) Formula

GoPositive Sequence Current using Fault Impedance(LLF) Formula

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Positive Sequence Current 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 = \frac{E a}{Z 1 + Z 2 + Z f}

I₁ - Positive Sequence Current?E_a - A Phase EMF?Z₁ - Positive Sequence Impedance?Z₂ - Negative Sequence Impedance?Z_f - Fault Impedance?

Positive Sequence Current using A-Phase EMF(LLF) Example

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Here is how the Positive Sequence Current using A-Phase EMF(LLF) equation looks like with Values.

Here is how the Positive Sequence Current using A-Phase EMF(LLF) equation looks like with Units.

Here is how the Positive Sequence Current using A-Phase EMF(LLF) equation looks like.

-0.8356 = \frac{29.38}{7.94 + -44.6 + 1.5}

-0.8356A = \frac{29.38V}{7.94Ω + -44.6Ω + 1.5Ω}

-0.8356 = \frac{29.38}{7.94 + -44.6 + 1.5}

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Positive Sequence Current using A-Phase EMF(LLF) Solution

Follow our step by step solution on how to calculate Positive Sequence Current using A-Phase EMF(LLF)?

FIRST Step Consider the formula

I 1 = \frac{E a}{Z 1 + Z 2 + Z f}

Next Step Substitute values of Variables

∴

I 1 = \frac{29.38V}{7.94Ω + -44.6Ω + 1.5Ω}

Next Step Prepare to Evaluate

∴

I 1 = \frac{29.38}{7.94 + -44.6 + 1.5}

Next Step Evaluate

∴

I 1 = -0.835608646188851A

LAST Step Rounding Answer

∴

I 1 = -0.8356A

Positive Sequence Current using A-Phase EMF(LLF) Formula Elements

Variables

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

A Phase EMF

A phase EMF is defined as the electromagnetic force of the a-phase in open conductor fault.

Symbol: E_a

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find A Phase EMF

Positive Sequence Impedance

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

Symbol: Z₁

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Positive Sequence Impedance

Negative Sequence Impedance

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

Symbol: Z₂

Measurement: Electric ResistanceUnit: Ω

Note: Value can be positive or negative.

Formulas to find Negative Sequence Impedance

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

Other Formulas to find Positive Sequence Current

Go Positive Sequence Current (LLF)

I 1 = (- 1) \cdot I 2

Go Positive Sequence Current using Fault Impedance(LLF)

I 1 = \frac{V 1 - V 2}{Z f}

Other formulas in Current category

Go B-Phase Current (LLF)

I b = (- 1) \cdot I c

Go C-Phase Current(LLF)

I c = (- 1) \cdot I b

Go Negative Sequence Current(LLF)

I 2 = (- 1) \cdot I 1

Go Fault Current(LLF)

I f = \frac{\sqrt{3} \cdot E a}{Z 1 + Z 2}

How to Evaluate Positive Sequence Current using A-Phase EMF(LLF)?

Positive Sequence Current using A-Phase EMF(LLF) evaluator uses Positive Sequence Current = A Phase EMF/(Positive Sequence Impedance+Negative Sequence Impedance+Fault Impedance) to evaluate the Positive Sequence Current, The Positive Sequence Current using A-phase EMF(LLF) formula is defined as the current that flows in one of the three phases of the power system, while the other two phases remain normal. Positive Sequence Current is denoted by I₁ symbol.

How to evaluate Positive Sequence Current using A-Phase EMF(LLF) using this online evaluator? To use this online evaluator for Positive Sequence Current using A-Phase EMF(LLF), enter A Phase EMF (E_a), Positive Sequence Impedance (Z₁), Negative Sequence Impedance (Z₂) & Fault Impedance (Z_f) and hit the calculate button.

FAQs on Positive Sequence Current using A-Phase EMF(LLF)

What is the formula to find Positive Sequence Current using A-Phase EMF(LLF)?

The formula of Positive Sequence Current using A-Phase EMF(LLF) is expressed as Positive Sequence Current = A Phase EMF/(Positive Sequence Impedance+Negative Sequence Impedance+Fault Impedance). Here is an example- 0.543671 = 29.38/(7.94+(-44.6)+1.5).

How to calculate Positive Sequence Current using A-Phase EMF(LLF)?

With A Phase EMF (E_a), Positive Sequence Impedance (Z₁), Negative Sequence Impedance (Z₂) & Fault Impedance (Z_f) we can find Positive Sequence Current using A-Phase EMF(LLF) using the formula - Positive Sequence Current = A Phase EMF/(Positive Sequence Impedance+Negative Sequence Impedance+Fault Impedance).

What are the other ways to Calculate Positive Sequence Current?

Here are the different ways to Calculate Positive Sequence Current-

Positive Sequence Current=(-1)*Negative Sequence Current
Positive Sequence Current=(Positive Sequence Voltage-Negative Sequence Voltage)/Fault Impedance

Can the Positive Sequence Current using A-Phase EMF(LLF) be negative?

Yes, the Positive Sequence Current using A-Phase EMF(LLF), measured in Electric Current can be negative.

Which unit is used to measure Positive Sequence Current using A-Phase EMF(LLF)?

Positive Sequence Current using A-Phase EMF(LLF) 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 A-Phase EMF(LLF) can be measured.

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

​GoPositive Sequence Current (LLF) Formula

​GoPositive Sequence Current using Fault Impedance(LLF) Formula

Positive Sequence Current using A-Phase EMF(LLF) Example

Positive Sequence Current using A-Phase EMF(LLF) Solution

Positive Sequence Current using A-Phase EMF(LLF) Formula Elements

Other Formulas to find Positive Sequence Current

Other formulas in Current category

How to Evaluate Positive Sequence Current using A-Phase EMF(LLF)?

FAQs on Positive Sequence Current using A-Phase EMF(LLF)

Variable Name

GoPositive Sequence Current (LLF) Formula

GoPositive Sequence Current using Fault Impedance(LLF) Formula