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Positive Sequence Impedance using A-Phase EMF (LGF) Formula

GoPositive Sequence Impedance for L-G-F Formula

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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. Check FAQs

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

Z_1(lg) - Positive Sequence Impedance LG?E_1(lg) - EMF Induced in Primary Winding LG?I_1(lg) - Positive Sequence Current LG?Z_f(lg) - Fault Impedance LG?Z_0(lg) - Zero Sequence Impedance LG?Z_2(lg) - Negative Sequence Impedance LG?

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

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

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

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

42.3449 = (\frac{20.5}{2.001}) - (3 \cdot 1.5) - 8 - -44.6

42.3449Ω = (\frac{20.5V}{2.001A}) - (3 \cdot 1.5Ω) - 8Ω - -44.6Ω

42.3449 = (\frac{20.5}{2.001}) - (3 \cdot 1.5) - 8 - -44.6

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Positive Sequence Impedance using A-Phase EMF (LGF) Solution

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

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

Z 1(lg) = (\frac{20.5V}{2.001A}) - (3 \cdot 1.5Ω) - 8Ω - -44.6Ω

Next Step Prepare to Evaluate

∴

Z 1(lg) = (\frac{20.5}{2.001}) - (3 \cdot 1.5) - 8 - -44.6

Next Step Evaluate

∴

Z 1(lg) = 42.3448775612194Ω

LAST Step Rounding Answer

∴

Z 1(lg) = 42.3449Ω

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

Variables

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: Z_1(lg)

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

EMF Induced in Primary Winding LG

EMF Induced in Primary Winding LG is the production of voltage in a coil because of the change in magnetic flux through a coil.

Symbol: E_1(lg)

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

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.

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.

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: Z_0(lg)

Measurement: Electric ResistanceUnit: Ω

Note: Value can be positive or negative.

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: Z_2(lg)

Measurement: Electric ResistanceUnit: Ω

Note: Value can be positive or negative.

Credits

Created by Urvi Rathod

Vishwakarma Government Engineering College (VGEC), Ahmedabad

Urvi Rathod has created this Formula and 1500+ more formulas!

Verified by Payal Priya

Birsa Institute of Technology (BIT), Sindri

Payal Priya has verified this Formula and 1900+ more formulas!

Other Formulas to find Positive Sequence Impedance LG

Go Positive Sequence Impedance for L-G-F

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

Other formulas in Impedance category

Go Fault Impedance using A-Phase Voltage(LGF)

Z f(lg) = \frac{V a(lg)}{I a(lg)}

Go Zero Sequence Impedance for L-G-F

Z 0(lg) = (- 1) \cdot \frac{V 0(lg)}{I 0(lg)}

Go Zero Sequence Impedance using A-Phase EMF (LGF)

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

Go Fault Impedance given Sequence Voltages(LGF)

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

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

Positive Sequence Impedance using A-Phase EMF (LGF) evaluator uses Positive Sequence Impedance LG = (EMF Induced in Primary Winding LG/Positive Sequence Current LG)-(3*Fault Impedance LG)-Zero Sequence Impedance LG-Negative Sequence Impedance LG to evaluate the Positive Sequence Impedance LG, The Positive Sequence Impedance using a-phase EMF (LGF) formula is consists of balanced three-phase impedance phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ABC rotation. Positive Sequence Impedance LG is denoted by Z_1(lg) symbol.

How to evaluate Positive Sequence Impedance using A-Phase EMF (LGF) using this online evaluator? To use this online evaluator for Positive Sequence Impedance using A-Phase EMF (LGF), enter EMF Induced in Primary Winding LG (E_1(lg)), Positive Sequence Current LG (I_1(lg)), Fault Impedance LG (Z_f(lg)), Zero Sequence Impedance LG (Z_0(lg)) & Negative Sequence Impedance LG (Z_2(lg)) and hit the calculate button.

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

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

The formula of Positive Sequence Impedance using A-Phase EMF (LGF) is expressed as Positive Sequence Impedance LG = (EMF Induced in Primary Winding LG/Positive Sequence Current LG)-(3*Fault Impedance LG)-Zero Sequence Impedance LG-Negative Sequence Impedance LG. Here is an example- 42.34488 = (20.5/2.001)-(3*1.5)-8-(-44.6).

How to calculate Positive Sequence Impedance using A-Phase EMF (LGF)?

With EMF Induced in Primary Winding LG (E_1(lg)), Positive Sequence Current LG (I_1(lg)), Fault Impedance LG (Z_f(lg)), Zero Sequence Impedance LG (Z_0(lg)) & Negative Sequence Impedance LG (Z_2(lg)) we can find Positive Sequence Impedance using A-Phase EMF (LGF) using the formula - Positive Sequence Impedance LG = (EMF Induced in Primary Winding LG/Positive Sequence Current LG)-(3*Fault Impedance LG)-Zero Sequence Impedance LG-Negative Sequence Impedance LG.

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

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

Positive Sequence Impedance LG=(EMF Induced in Primary Winding LG-Positive Sequence Voltage LG)/Positive Sequence Current LG

Can the Positive Sequence Impedance using A-Phase EMF (LGF) be negative?

No, the Positive Sequence Impedance using A-Phase EMF (LGF), measured in Electric Resistance cannot be negative.

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

Positive Sequence Impedance using A-Phase EMF (LGF) is usually measured using the Ohm[Ω] for Electric Resistance. Megohm[Ω], Microhm[Ω], Volt per Ampere[Ω] are the few other units in which Positive Sequence Impedance using A-Phase EMF (LGF) can be measured.