Negative Sequence Voltage (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%
✖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 [I₁]			+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 (LLF) [V₂]

⎘ Copy

👎

Formula

LaTeX

Reset

👍

Download Fault Formula PDF PDF Image

Negative Sequence Voltage (LLF) Solution

STEP 0: Pre-Calculation Summary

Formula Used

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

Variables Used

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.
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.
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.

STEP 1: Convert Input(s) to Base Unit

Positive Sequence Voltage: 17.5 Volt --> 17.5 Volt No Conversion Required
Fault Impedance: 1.5 Ohm --> 1.5 Ohm No Conversion Required
Positive Sequence Current: 2.001 Ampere --> 2.001 Ampere No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

V₂ = V₁-(Z_f*I₁) --> 17.5-(1.5*2.001)

Evaluating ... ...

V₂ = 14.4985

STEP 3: Convert Result to Output's Unit

14.4985 Volt --> No Conversion Required

FINAL ANSWER

14.4985 Volt <-- Negative Sequence Voltage

(Calculation completed in 00.004 seconds)

You are here -

Home » Engineering » Electrical » Power System » Fault » Shunt Faults » Unsymmetrical Faults » L L Fault » Voltage and EMF » Negative Sequence Voltage (LLF)

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!

< Voltage and EMF Calculators

C-Phase Voltage using C-Phase Current (LLF)

LaTeX Go C Phase Voltage = B Phase Voltage+(Fault Impedance*C Phase Current)

B-Phase Voltage using C-Phase Current (LLF)

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

B-Phase Voltage (LLF)

LaTeX Go B Phase Voltage = (Fault Impedance*B Phase Current)+C Phase Voltage

C-Phase Voltage (LLF)

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

Negative Sequence Voltage (LLF) Formula

LaTeX Go

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

What are sequence voltages?

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 Negative Sequence Voltage (LLF)?

Negative Sequence Voltage (LLF) calculator uses Negative Sequence Voltage = Positive Sequence Voltage-(Fault Impedance*Positive Sequence Current) to calculate the Negative Sequence Voltage, The Negative Sequence Voltage (LLF) formula is defined as consists of balanced three-phase voltage and current phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ACB rotation. Negative Sequence Voltage is denoted by V₂ symbol.

How to calculate Negative Sequence Voltage (LLF) using this online calculator? To use this online calculator for Negative Sequence Voltage (LLF), enter Positive Sequence Voltage (V₁), Fault Impedance (Z_f) & Positive Sequence Current (I₁) and hit the calculate button. Here is how the Negative Sequence Voltage (LLF) calculation can be explained with given input values -> 10.4985 = 17.5-(1.5*2.001).

FAQ

What is Negative Sequence Voltage (LLF)?

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

How to calculate Negative Sequence Voltage (LLF)?

The Negative Sequence Voltage (LLF) formula is defined as consists of balanced three-phase voltage and current phasors which are exactly at ₁₂₀ degrees apart rotating counterclockwise in ACB rotation is calculated using Negative Sequence Voltage = Positive Sequence Voltage-(Fault Impedance*Positive Sequence Current). To calculate Negative Sequence Voltage (LLF), you need Positive Sequence Voltage (V₁), Fault Impedance (Z_f) & Positive Sequence Current (I₁). With our tool, you need to enter the respective value for Positive Sequence Voltage, Fault Impedance & Positive Sequence Current 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 Negative Sequence Voltage?

In this formula, Negative Sequence Voltage uses Positive Sequence Voltage, Fault Impedance & Positive Sequence Current. We can use 1 other way(s) to calculate the same, which is/are as follows -

Negative Sequence Voltage = (A Phase EMF*Negative Sequence Impedance)/(Positive Sequence Impedance+Negative Sequence Impedance)

Home

FREE PDFs

🔍 Search