Positive Sequence Current using Fault Impedance(LGF) Calculator

✖Positive Sequence Voltage LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.ⓘ Positive Sequence Voltage LG [V_1(lg)]			+10% -10%
✖Negative Sequence Voltage LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB rotation.ⓘ Negative Sequence Voltage LG [V_2(lg)]			+10% -10%
✖Zero Sequence Voltage LG consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counterclockwise together.ⓘ Zero Sequence Voltage LG [V_0(lg)]			+10% -10%
✖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.ⓘ Fault Impedance LG [Z_f(lg)]			+10% -10%

✖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.ⓘ Positive Sequence Current using Fault Impedance(LGF) [I_1(lg)]

⎘ Copy

👎

Formula

✖

Positive Sequence Current using Fault Impedance(LGF)

Formula

`"I"_{"1(lg)"} = ("V"_{"1(lg)"}+"V"_{"2(lg)"}+"V"_{"0(lg)"})/(3*"Z"_{"f(lg)"})`

Example

`"11.368A"=("17.5V"+"16.056V"+"17.6V")/(3*"1.5Ω")`

Calculator

LaTeX

Reset

👍

Download Fault Formula PDF PDF Image

Positive Sequence Current using Fault Impedance(LGF) Solution

STEP 0: Pre-Calculation Summary

Formula Used

Positive Sequence Current LG = (Positive Sequence Voltage LG+Negative Sequence Voltage LG+Zero Sequence Voltage LG)/(3*Fault Impedance LG)
I_1(lg) = (V_1(lg)+V_2(lg)+V_0(lg))/(3*Z_f(lg))
This formula uses 5 Variables

Variables Used

Positive Sequence Current LG - (Measured in Ampere) - 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.
Positive Sequence Voltage LG - (Measured in Volt) - Positive Sequence Voltage LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.
Negative Sequence Voltage LG - (Measured in Volt) - Negative Sequence Voltage LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB rotation.
Zero Sequence Voltage LG - (Measured in Volt) - Zero Sequence Voltage LG consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counterclockwise together.
Fault Impedance LG - (Measured in Ohm) - 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.

STEP 1: Convert Input(s) to Base Unit

Positive Sequence Voltage LG: 17.5 Volt --> 17.5 Volt No Conversion Required
Negative Sequence Voltage LG: 16.056 Volt --> 16.056 Volt No Conversion Required
Zero Sequence Voltage LG: 17.6 Volt --> 17.6 Volt No Conversion Required
Fault Impedance LG: 1.5 Ohm --> 1.5 Ohm No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

I_1(lg) = (V_1(lg)+V_2(lg)+V_0(lg))/(3*Z_f(lg)) --> (17.5+16.056+17.6)/(3*1.5)

Evaluating ... ...

I_1(lg) = 11.368

STEP 3: Convert Result to Output's Unit

11.368 Ampere --> No Conversion Required

FINAL ANSWER

11.368 Ampere <-- Positive Sequence Current LG

(Calculation completed in 00.004 seconds)

You are here -

Home » Engineering » Electrical » Power System » Fault » Shunt Faults » Unsymmetrical Faults » L-G Fault » Current » Positive Sequence Current using Fault Impedance(LGF)

Credits

Created by Urvi Rathod

Vishwakarma Government Engineering College (VGEC), Ahmedabad

Urvi Rathod has created this Calculator and 1500+ more calculators!

Verified by Payal Priya

Birsa Institute of Technology (BIT), Sindri

Payal Priya has verified this Calculator and 1900+ more calculators!

< 19 Current Calculators

Zero Sequence Current using A-Phase EMF (LGF)

Go Zero Sequence Current LG = EMF Induced in Primary Winding LG/(Zero Sequence Impedance LG+Negative Sequence Impedance LG+Positive Sequence Impedance LG+(3*Fault Impedance LG))

Positive Sequence Current using A-Phase EMF (LGF)

Go Positive Sequence Current LG = A Phase EMF LG/(Zero Sequence Impedance LG+Negative Sequence Impedance LG+Positive Sequence Impedance LG+(3*Fault Impedance LG))

Negative Sequence Current using A-Phase EMF (LGF)

Go Negative Sequence Current LG = A Phase EMF LG/(Zero Sequence Impedance LG+Negative Sequence Impedance LG+Positive Sequence Impedance LG+(3*Fault Impedance LG))

A-Phase Current using Fault Voltage and Fault Impedance(LGF)

Go A-Phase Current LG = Fault Voltage LG/(Fault Impedance LG+((1/3)*(Zero Sequence Impedance LG+Positive Sequence Impedance LG+Negative Sequence Impedance LG)))

Positive Sequence Current using Fault Impedance(LGF)

Go Positive Sequence Current LG = (Positive Sequence Voltage LG+Negative Sequence Voltage LG+Zero Sequence Voltage LG)/(3*Fault Impedance LG)

A-Phase Current using A-Phase EMF(LGF)

Go A-Phase Current LG = (3*A Phase EMF LG)/(Zero Sequence Impedance LG+Positive Sequence Impedance LG+Negative Sequence Impedance LG)

A-Phase Current using Sequence Voltages and Fault Impedance(LGF)

Go A-Phase Current LG = (Zero Sequence Voltage LG+Positive Sequence Voltage LG+Negative Sequence Voltage LG)/Fault Impedance LG

A-Phase Current using Fault Impedance(LGF)

Go A-Phase Current LG = (3*Zero Sequence Voltage LG-B Phase Voltage LG-C Phase Voltage LG)/Fault Impedance LG

Positive Sequence Current for L-G-F

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

A-Phase Current using Sequence Current(LGF)

Go A-Phase Current LG = Zero Sequence Current LG+Positive Sequence Current LG+Negative Sequence Current LG

Negative Sequence Current for L-G-F

Go Negative Sequence Current LG = (-1)*Negative Sequence Voltage LG/Negative Sequence Impedance LG

Zero Sequence Current for L-G-F

Go Zero Sequence Current LG = (-1)*Zero Sequence Voltage LG/Zero Sequence Impedance LG

A-Phase Current using A-Phase Voltage(LGF)

Go A-Phase Current LG = A Phase Voltage LG/Fault Impedance LG

A-Phase Current using Positive Sequence Current (LGF)

Go A-Phase Current LG = Positive Sequence Current LG*3

A-Phase Current using Negative Sequence Current (LGF)

Go A-Phase Current LG = 3*Negative Sequence Current LG

Positive Sequence Current using A-Phase Current (LGF)

Go Positive Sequence Current LG = A-Phase Current LG/3

Negative Sequence Current using A-Phase Current (LGF)

Go Negative Sequence Current LG = A-Phase Current LG/3

A-Phase Current using Zero Sequence Current (LGF)

Go A-Phase Current LG = Zero Sequence Current LG*3

Zero Sequence Current using A-Phase Current (LGF)

Go Zero Sequence Current LG = A-Phase Current LG/3

Positive Sequence Current using Fault Impedance(LGF) Formula

Positive Sequence Current LG = (Positive Sequence Voltage LG+Negative Sequence Voltage LG+Zero Sequence Voltage LG)/(3*Fault Impedance LG)
I_1(lg) = (V_1(lg)+V_2(lg)+V_0(lg))/(3*Z_f(lg))

What are the Sequence Components?

The positive sequence consists of balanced three-phase voltage and current phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ABC rotation. The negative sequence consists of balanced three-phase voltage and current phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ACB rotation. Zero sequence consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counterclockwise together.

How to Calculate Positive Sequence Current using Fault Impedance(LGF)?

Positive Sequence Current using Fault Impedance(LGF) calculator uses Positive Sequence Current LG = (Positive Sequence Voltage LG+Negative Sequence Voltage LG+Zero Sequence Voltage LG)/(3*Fault Impedance LG) to calculate the Positive Sequence Current LG, The Positive Sequence current using fault impedance(LGF) 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 Current LG is denoted by I_1(lg) symbol.

How to calculate Positive Sequence Current using Fault Impedance(LGF) using this online calculator? To use this online calculator for Positive Sequence Current using Fault Impedance(LGF), enter Positive Sequence Voltage LG (V_1(lg)), Negative Sequence Voltage LG (V_2(lg)), Zero Sequence Voltage LG (V_0(lg)) & Fault Impedance LG (Z_f(lg)) and hit the calculate button. Here is how the Positive Sequence Current using Fault Impedance(LGF) calculation can be explained with given input values -> 11.368 = (17.5+16.056+17.6)/(3*1.5).

FAQ

What is Positive Sequence Current using Fault Impedance(LGF)?

The Positive Sequence current using fault impedance(LGF) formula is consists of balanced three-phase voltage and current phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ABC rotation and is represented as I_1(lg) = (V_1(lg)+V_2(lg)+V_0(lg))/(3*Z_f(lg)) or Positive Sequence Current LG = (Positive Sequence Voltage LG+Negative Sequence Voltage LG+Zero Sequence Voltage LG)/(3*Fault Impedance LG). Positive Sequence Voltage LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation, Negative Sequence Voltage LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB rotation, Zero Sequence Voltage LG consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counterclockwise together & 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.

How to calculate Positive Sequence Current using Fault Impedance(LGF)?

The Positive Sequence current using fault impedance(LGF) formula is consists of balanced three-phase voltage and current phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ABC rotation is calculated using Positive Sequence Current LG = (Positive Sequence Voltage LG+Negative Sequence Voltage LG+Zero Sequence Voltage LG)/(3*Fault Impedance LG). To calculate Positive Sequence Current using Fault Impedance(LGF), you need Positive Sequence Voltage LG (V_1(lg)), Negative Sequence Voltage LG (V_2(lg)), Zero Sequence Voltage LG (V_0(lg)) & Fault Impedance LG (Z_f(lg)). With our tool, you need to enter the respective value for Positive Sequence Voltage LG, Negative Sequence Voltage LG, Zero Sequence Voltage LG & Fault Impedance LG and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Positive Sequence Current LG?

In this formula, Positive Sequence Current LG uses Positive Sequence Voltage LG, Negative Sequence Voltage LG, Zero Sequence Voltage LG & Fault Impedance LG. We can use 3 other way(s) to calculate the same, which is/are as follows -

Positive Sequence Current LG = A-Phase Current LG/3
Positive Sequence Current LG = (Positive Sequence Voltage LG-EMF Induced in Primary Winding LG)/Positive Sequence Impedance LG
Positive Sequence Current LG = A Phase EMF LG/(Zero Sequence Impedance LG+Negative Sequence Impedance LG+Positive Sequence Impedance LG+(3*Fault Impedance LG))

Home

FREE PDFs

🔍 Search