A-Phase Current using Fault Impedance(LGF) Calculator

✖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%
✖B phase Voltage LG is defined as the voltage of b-phase.ⓘ B Phase Voltage LG [V_b(lg)]			+10% -10%
✖C phase Voltage LG is defined as the voltage of c-phase.ⓘ C Phase Voltage LG [V_c(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%

✖A-phase Current LG is the current that flows into the a-phase in open conductor fault.ⓘ A-Phase Current using Fault Impedance(LGF) [I_a(lg)]

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A-Phase Current using Fault Impedance(LGF) Solution

STEP 0: Pre-Calculation Summary

Formula Used

A-Phase Current LG = (3*Zero Sequence Voltage LG-B Phase Voltage LG-C Phase Voltage LG)/Fault Impedance LG
I_a(lg) = (3*V_0(lg)-V_b(lg)-V_c(lg))/Z_f(lg)
This formula uses 5 Variables

Variables Used

A-Phase Current LG - (Measured in Ampere) - A-phase Current LG is the current that flows into the a-phase in open conductor fault.
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.
B Phase Voltage LG - (Measured in Volt) - B phase Voltage LG is defined as the voltage of b-phase.
C Phase Voltage LG - (Measured in Volt) - C phase Voltage LG is defined as the voltage of c-phase.
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

Zero Sequence Voltage LG: 17.6 Volt --> 17.6 Volt No Conversion Required
B Phase Voltage LG: 16.5 Volt --> 16.5 Volt No Conversion Required
C Phase Voltage LG: 17.2 Volt --> 17.2 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_a(lg) = (3*V_0(lg)-V_b(lg)-V_c(lg))/Z_f(lg) --> (3*17.6-16.5-17.2)/1.5

Evaluating ... ...

I_a(lg) = 12.7333333333333

STEP 3: Convert Result to Output's Unit

12.7333333333333 Ampere --> No Conversion Required

FINAL ANSWER

12.7333333333333 ≈ 12.73333 Ampere <-- A-Phase Current LG

(Calculation completed in 00.004 seconds)

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Indian Institute of Technology,Roorlee (IITR), Roorkee

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< Current Calculators

Positive Sequence Current using Fault Impedance(LGF)

LaTeX 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 Positive Sequence Current (LGF)

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

A-Phase Current using Negative Sequence Current (LGF)

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

A-Phase Current using Zero Sequence Current (LGF)

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

A-Phase Current using Fault Impedance(LGF) Formula

LaTeX Go

A-Phase Current LG = (3*Zero Sequence Voltage LG-B Phase Voltage LG-C Phase Voltage LG)/Fault Impedance LG
I_a(lg) = (3*V_0(lg)-V_b(lg)-V_c(lg))/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 A-Phase Current using Fault Impedance(LGF)?

A-Phase Current using Fault Impedance(LGF) calculator uses A-Phase Current LG = (3*Zero Sequence Voltage LG-B Phase Voltage LG-C Phase Voltage LG)/Fault Impedance LG to calculate the A-Phase Current LG, The A-phase Current using Fault Impedance(LGF) formula is defined as the current through any one component comprising a three-phase source or load. here we have taken the a-phase. A-Phase Current LG is denoted by I_a(lg) symbol.

How to calculate A-Phase Current using Fault Impedance(LGF) using this online calculator? To use this online calculator for A-Phase Current using Fault Impedance(LGF), enter Zero Sequence Voltage LG (V_0(lg)), B Phase Voltage LG (V_b(lg)), C Phase Voltage LG (V_c(lg)) & Fault Impedance LG (Z_f(lg)) and hit the calculate button. Here is how the A-Phase Current using Fault Impedance(LGF) calculation can be explained with given input values -> 12.73333 = (3*17.6-16.5-17.2)/1.5.

FAQ

What is A-Phase Current using Fault Impedance(LGF)?

The A-phase Current using Fault Impedance(LGF) formula is defined as the current through any one component comprising a three-phase source or load. here we have taken the a-phase and is represented as I_a(lg) = (3*V_0(lg)-V_b(lg)-V_c(lg))/Z_f(lg) or A-Phase Current LG = (3*Zero Sequence Voltage LG-B Phase Voltage LG-C Phase Voltage LG)/Fault Impedance LG. 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, B phase Voltage LG is defined as the voltage of b-phase, C phase Voltage LG is defined as the voltage of c-phase & 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 A-Phase Current using Fault Impedance(LGF)?

The A-phase Current using Fault Impedance(LGF) formula is defined as the current through any one component comprising a three-phase source or load. here we have taken the a-phase is calculated using A-Phase Current LG = (3*Zero Sequence Voltage LG-B Phase Voltage LG-C Phase Voltage LG)/Fault Impedance LG. To calculate A-Phase Current using Fault Impedance(LGF), you need Zero Sequence Voltage LG (V_0(lg)), B Phase Voltage LG (V_b(lg)), C Phase Voltage LG (V_c(lg)) & Fault Impedance LG (Z_f(lg)). With our tool, you need to enter the respective value for Zero Sequence Voltage LG, B Phase Voltage LG, C Phase 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 A-Phase Current LG?

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

A-Phase Current LG = Positive Sequence Current LG*3
A-Phase Current LG = 3*Negative Sequence Current LG
A-Phase Current LG = Zero Sequence Current LG*3

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