Positive Sequence Current using Fault Impedance(LLF) Calculator

✖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%
✖Negative Sequence Voltage consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB rotation.ⓘ Negative Sequence Voltage [V₂]			+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%

✖Positive Sequence Current 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(LLF) [I₁]

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Positive Sequence Current using Fault Impedance(LLF)

Formula

`"I"_{"1"} = ("V"_{"1"}-"V"_{"2"})/"Z"_{"f"}`

Example

`"0.962667A"=("17.5V"-"16.056V")/"1.5Ω"`

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Positive Sequence Current using Fault Impedance(LLF) Solution

STEP 0: Pre-Calculation Summary

Formula Used

Positive Sequence Current = (Positive Sequence Voltage-Negative Sequence Voltage)/Fault Impedance
I₁ = (V₁-V₂)/Z_f
This formula uses 4 Variables

Variables Used

Positive Sequence Current - (Measured in Ampere) - Positive Sequence Current consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.
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.
Negative Sequence Voltage - (Measured in Volt) - Negative Sequence Voltage consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB 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

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

STEP 2: Evaluate Formula

Substituting Input Values in Formula

I₁ = (V₁-V₂)/Z_f --> (17.5-16.056)/1.5

Evaluating ... ...

I₁ = 0.962666666666666

STEP 3: Convert Result to Output's Unit

0.962666666666666 Ampere --> No Conversion Required

FINAL ANSWER

0.962666666666666 ≈ 0.962667 Ampere <-- Positive Sequence Current

(Calculation completed in 00.004 seconds)

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Positive Sequence Current using A-Phase EMF(LLF)

Go Positive Sequence Current = A Phase EMF/(Positive Sequence Impedance+Negative Sequence Impedance+Fault Impedance)

B-Phase Current using A-Phase EMF(LLF)

Go B Phase Current = (sqrt(3)*A Phase EMF)/(Positive Sequence Impedance+Negative Sequence Impedance)

Fault Current(LLF)

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

Positive Sequence Current using Fault Impedance(LLF)

Go Positive Sequence Current = (Positive Sequence Voltage-Negative Sequence Voltage)/Fault Impedance

B-Phase Current using Fault Impedance (LLF)

Go B Phase Current = (B Phase Voltage-C Phase Voltage)/Fault Impedance

C-Phase Current using Fault Impedance (LLF)

Go C Phase Current = (C Phase Voltage-B Phase Voltage)/Fault Impedance

Positive Sequence Current (LLF)

Go Positive Sequence Current = (-1)*Negative Sequence Current

Negative Sequence Current(LLF)

Go Negative Sequence Current = (-1)*Positive Sequence Current

B-Phase Current (LLF)

Go B Phase Current = (-1)*C Phase Current

C-Phase Current(LLF)

Go C Phase Current = (-1)*B Phase Current

Positive Sequence Current using Fault Impedance(LLF) Formula

Positive Sequence Current = (Positive Sequence Voltage-Negative Sequence Voltage)/Fault Impedance
I₁ = (V₁-V₂)/Z_f

What is a line to line fault?

A line-to-line fault, also known as a three-phase fault, is a type of electrical fault that occurs in a three-phase power system. This type of fault occurs when a failure occurs between two phases of the power system, causing a current to flow from one phase to the other. This can cause significant damage to the electrical equipment and potentially pose a safety risk to people and the environment.

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

Positive Sequence Current using Fault Impedance(LLF) calculator uses Positive Sequence Current = (Positive Sequence Voltage-Negative Sequence Voltage)/Fault Impedance to calculate the Positive Sequence Current, The Positive Sequence Current using Fault Impedance(LLF) formula consists of balanced three-phase voltage and current phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ACB rotation. Positive Sequence Current is denoted by I₁ symbol.

How to calculate Positive Sequence Current using Fault Impedance(LLF) using this online calculator? To use this online calculator for Positive Sequence Current using Fault Impedance(LLF), enter Positive Sequence Voltage (V₁), Negative Sequence Voltage (V₂) & Fault Impedance (Z_f) and hit the calculate button. Here is how the Positive Sequence Current using Fault Impedance(LLF) calculation can be explained with given input values -> -1.704 = (17.5-16.056)/1.5.

FAQ

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

The Positive Sequence Current using Fault Impedance(LLF) formula consists of balanced three-phase voltage and current phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ACB rotation and is represented as I₁ = (V₁-V₂)/Z_f or Positive Sequence Current = (Positive Sequence Voltage-Negative Sequence Voltage)/Fault Impedance. Positive Sequence Voltage consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation, Negative Sequence Voltage consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB 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 Positive Sequence Current using Fault Impedance(LLF)?

The Positive Sequence Current using Fault Impedance(LLF) formula consists of balanced three-phase voltage and current phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ACB rotation is calculated using Positive Sequence Current = (Positive Sequence Voltage-Negative Sequence Voltage)/Fault Impedance. To calculate Positive Sequence Current using Fault Impedance(LLF), you need Positive Sequence Voltage (V₁), Negative Sequence Voltage (V₂) & Fault Impedance (Z_f). With our tool, you need to enter the respective value for Positive Sequence Voltage, Negative 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 Positive Sequence Current?

In this formula, Positive Sequence Current uses Positive Sequence Voltage, Negative Sequence Voltage & Fault Impedance. We can use 2 other way(s) to calculate the same, which is/are as follows -

Positive Sequence Current = (-1)*Negative Sequence Current
Positive Sequence Current = A Phase EMF/(Positive Sequence Impedance+Negative Sequence Impedance+Fault Impedance)

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