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A phase EMF LG is defined as the electromagnetic force of the a-phase in open conductor fault. Check FAQs
Ea(lg)=I1(lg)⋅((3⋅Zf(lg))+Z0(lg)+Z1(lg)+Z2(lg))
Ea(lg) - A Phase EMF LG?I1(lg) - Positive Sequence Current LG?Zf(lg) - Fault Impedance LG?Z0(lg) - Zero Sequence Impedance LG?Z1(lg) - Positive Sequence Impedance LG?Z2(lg) - Negative Sequence Impedance LG?

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

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

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

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

-48.3442Edit=2.001Edit⋅((3⋅1.5Edit)+8Edit+7.94Edit+-44.6Edit)
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A-Phase EMF using Positive Sequence Current(LGF) Solution

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

FIRST Step Consider the formula
Ea(lg)=I1(lg)⋅((3⋅Zf(lg))+Z0(lg)+Z1(lg)+Z2(lg))
Next Step Substitute values of Variables
∴ Ea(lg)=2.001A⋅((3⋅1.5Ω)+8Ω+7.94Ω+-44.6Ω)
Next Step Prepare to Evaluate
∴ Ea(lg)=2.001⋅((3⋅1.5)+8+7.94+-44.6)
Next Step Evaluate
∴Ea(lg)=-48.34416V
LAST Step Rounding Answer
∴Ea(lg)=-48.3442V

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

Variables
A Phase EMF LG
A phase EMF LG is defined as the electromagnetic force of the a-phase in open conductor fault.
Symbol: Ea(lg)
Measurement: Electric PotentialUnit: V
Note: Value can be positive or negative.
Formulas to find A Phase EMF LGOpen Variable
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: I1(lg)
Measurement: Electric CurrentUnit: A
Note: Value can be positive or negative.
Formulas to find Positive Sequence Current LGOpen Variable
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: Zf(lg)
Measurement: Electric ResistanceUnit: Ω
Note: Value should be greater than 0.
Formulas to find Fault Impedance LGOpen Variable
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: Z0(lg)
Measurement: Electric ResistanceUnit: Ω
Note: Value can be positive or negative.
Formulas to find Zero Sequence Impedance LGOpen Variable
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: Z1(lg)
Measurement: Electric ResistanceUnit: Ω
Note: Value should be greater than 0.
Formulas to find Positive Sequence Impedance LGOpen Variable
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: Z2(lg)
Measurement: Electric ResistanceUnit: Ω
Note: Value can be positive or negative.
Formulas to find Negative Sequence Impedance LGOpen Variable

Other Formulas to find A Phase EMF LG

​Go A-Phase EMF using Positive Sequence Voltage (LGF)
Ea(lg)=V1(lg)+(Z1(lg)⋅I1(lg))
​Go A-Phase EMF using Zero Sequence Current (LGF)
Ea(lg)=I0(lg)⋅((3⋅Zf(lg))+Z0(lg)+Z1(lg)+Z2(lg))
​Go A-Phase EMF using Negative Sequence Current (LGF)
Ea(lg)=I2(lg)⋅((3⋅Zf(lg))+Z0(lg)+Z1(lg)+Z2(lg))

Other formulas in Voltage and EMF category

​Go Zero Sequence Voltage using A-Phase Current (LGF)
V0(lg)=(Zf(lg)⋅Ia(lg))-(V2(lg))-(V1(lg))
​Go A-Phase Voltage(LGF)
Va(lg)=Zf(lg)⋅Ia(lg)
​Go Positive Sequence Voltage for L-G-F
V1(lg)=E1(lg)-(Z1(lg)⋅I1(lg))
​Go Zero Sequence Voltage for LGF
V0(lg)=-Z0(lg)⋅I0(lg)

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

A-Phase EMF using Positive Sequence Current(LGF) evaluator uses A Phase EMF LG = Positive Sequence Current LG*((3*Fault Impedance LG)+Zero Sequence Impedance LG+Positive Sequence Impedance LG+Negative Sequence Impedance LG) to evaluate the A Phase EMF LG, The a-phase EMF using Positive Sequence Current(LGF) formula is defined as the electromotive force of the A-phase current flowing line. A Phase EMF LG is denoted by Ea(lg) symbol.

How to evaluate A-Phase EMF using Positive Sequence Current(LGF) using this online evaluator? To use this online evaluator for A-Phase EMF using Positive Sequence Current(LGF), enter Positive Sequence Current LG (I1(lg)), Fault Impedance LG (Zf(lg)), Zero Sequence Impedance LG (Z0(lg)), Positive Sequence Impedance LG (Z1(lg)) & Negative Sequence Impedance LG (Z2(lg)) and hit the calculate button.

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

What is the formula to find A-Phase EMF using Positive Sequence Current(LGF)?
The formula of A-Phase EMF using Positive Sequence Current(LGF) is expressed as A Phase EMF LG = Positive Sequence Current LG*((3*Fault Impedance LG)+Zero Sequence Impedance LG+Positive Sequence Impedance LG+Negative Sequence Impedance LG). Here is an example- -48.34416 = 2.001*((3*1.5)+8+7.94+(-44.6)).
How to calculate A-Phase EMF using Positive Sequence Current(LGF)?
With Positive Sequence Current LG (I1(lg)), Fault Impedance LG (Zf(lg)), Zero Sequence Impedance LG (Z0(lg)), Positive Sequence Impedance LG (Z1(lg)) & Negative Sequence Impedance LG (Z2(lg)) we can find A-Phase EMF using Positive Sequence Current(LGF) using the formula - A Phase EMF LG = Positive Sequence Current LG*((3*Fault Impedance LG)+Zero Sequence Impedance LG+Positive Sequence Impedance LG+Negative Sequence Impedance LG).
What are the other ways to Calculate A Phase EMF LG?
Here are the different ways to Calculate A Phase EMF LG-
  • A Phase EMF LG=Positive Sequence Voltage LG+(Positive Sequence Impedance LG*Positive Sequence Current LG)OpenImg
  • A Phase EMF LG=Zero Sequence Current LG*((3*Fault Impedance LG)+Zero Sequence Impedance LG+Positive Sequence Impedance LG+Negative Sequence Impedance LG)OpenImg
  • A Phase EMF LG=Negative Sequence Current LG*((3*Fault Impedance LG)+Zero Sequence Impedance LG+Positive Sequence Impedance LG+Negative Sequence Impedance LG)OpenImg
Can the A-Phase EMF using Positive Sequence Current(LGF) be negative?
Yes, the A-Phase EMF using Positive Sequence Current(LGF), measured in Electric Potential can be negative.
Which unit is used to measure A-Phase EMF using Positive Sequence Current(LGF)?
A-Phase EMF using Positive Sequence Current(LGF) is usually measured using the Volt[V] for Electric Potential. Millivolt[V], Microvolt[V], Nanovolt[V] are the few other units in which A-Phase EMF using Positive Sequence Current(LGF) can be measured.
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