Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF) Calculator

✖Zero Sequence Voltage 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 [V₀]			+10% -10%
✖Positive Sequence Voltage consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.ⓘ Positive Sequence Voltage [V₁]			+10% -10%
✖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.ⓘ Fault Impedance [Z_f]			+10% -10%

✖Zero Sequence Current consists of a balanced three-phase current, phasors of which all have the same phase angles and rotate counterclockwise together.ⓘ Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF) [I₀]

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Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF) Solution

STEP 0: Pre-Calculation Summary

Formula Used

Zero Sequence Current = (Zero Sequence Voltage-Positive Sequence Voltage)/(3*Fault Impedance)
I₀ = (V₀-V₁)/(3*Z_f)
This formula uses 4 Variables

Variables Used

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

STEP 1: Convert Input(s) to Base Unit

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

STEP 2: Evaluate Formula

Substituting Input Values in Formula

I₀ = (V₀-V₁)/(3*Z_f) --> (17.6-17.5)/(3*1.5)

Evaluating ... ...

I₀ = 0.0222222222222225

STEP 3: Convert Result to Output's Unit

0.0222222222222225 Ampere --> No Conversion Required

FINAL ANSWER

0.0222222222222225 ≈ 0.022222 Ampere <-- Zero Sequence Current

(Calculation completed in 00.004 seconds)

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Fault Current using B-Phase Voltage (LLGF)

LaTeX Go Fault Current = B Phase Voltage/Fault Impedance

B-Phase Current (LLGF)

LaTeX Go B Phase Current = Fault Current-C Phase Current

C-Phase Current (LLGF)

LaTeX Go C Phase Current = Fault Current-B Phase Current

Fault Current (LLGF)

LaTeX Go Fault Current = B Phase Current+C Phase Current

Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF) Formula

LaTeX Go

Zero Sequence Current = (Zero Sequence Voltage-Positive Sequence Voltage)/(3*Fault Impedance)
I₀ = (V₀-V₁)/(3*Z_f)

What is a double line to ground fault?

A double line to ground fault is a type of fault that can occur in an electrical power system. It is characterized by two of the three conductors in a three-phase power system coming into contact with the ground or earth.

How to Calculate Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF)?

Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF) calculator uses Zero Sequence Current = (Zero Sequence Voltage-Positive Sequence Voltage)/(3*Fault Impedance) to calculate the Zero Sequence Current, The Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF) formula is defined as balanced three-phase voltage and current phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ACB rotation. Zero Sequence Current is denoted by I₀ symbol.

How to calculate Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF) using this online calculator? To use this online calculator for Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF), enter Zero Sequence Voltage (V₀), Positive Sequence Voltage (V₁) & Fault Impedance (Z_f) and hit the calculate button. Here is how the Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF) calculation can be explained with given input values -> 0.911111 = (17.6-17.5)/(3*1.5).

FAQ

What is Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF)?

The Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF) formula is defined as balanced three-phase voltage and current phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ACB rotation and is represented as I₀ = (V₀-V₁)/(3*Z_f) or Zero Sequence Current = (Zero Sequence Voltage-Positive Sequence Voltage)/(3*Fault Impedance). Zero Sequence Voltage consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counterclockwise together, Positive Sequence Voltage consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation & 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.

How to calculate Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF)?

The Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF) formula is defined as balanced three-phase voltage and current phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ACB rotation is calculated using Zero Sequence Current = (Zero Sequence Voltage-Positive Sequence Voltage)/(3*Fault Impedance). To calculate Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF), you need Zero Sequence Voltage (V₀), Positive Sequence Voltage (V₁) & Fault Impedance (Z_f). With our tool, you need to enter the respective value for Zero Sequence Voltage, Positive Sequence Voltage & Fault Impedance 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 Zero Sequence Current?

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

Zero Sequence Current = B Phase Voltage/(3*Fault Impedance)
Zero Sequence Current = C Phase Voltage/(3*Fault Impedance)
Zero Sequence Current = (-1)*Zero Sequence Voltage/Zero Sequence Impedance

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