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Positive Sequence Impedance using A-Phase EMF(LLGF) Calculator

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Shunt FaultsOpen Conductor FaultSymmetric Components
Unsymmetrical Faults
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ImpedanceCurrentVoltage and EMF
✖A phase EMF is defined as the electromagnetic force of the a-phase in open conductor fault.ⓘ A Phase EMF [Ea]
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-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%
✖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%
✖Positive Sequence Impedance consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.ⓘ Positive Sequence Impedance using A-Phase EMF(LLGF) [Z1]
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Positive Sequence Impedance using A-Phase EMF(LLGF) Solution

STEP 0: Pre-Calculation Summary
Formula Used
Positive Sequence Impedance = (A Phase EMF-Positive Sequence Voltage)/Positive Sequence Current
Z1 = (Ea-V1)/I1
This formula uses 4 Variables
Variables Used
Positive Sequence Impedance - (Measured in Ohm) - Positive Sequence Impedance consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.
A Phase EMF - (Measured in Volt) - A phase EMF is defined as the electromagnetic force of the a-phase in open conductor fault.
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.
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
A Phase EMF: 29.38 Volt --> 29.38 Volt No Conversion Required
Positive Sequence Voltage: 17.5 Volt --> 17.5 Volt No Conversion Required
Positive Sequence Current: 2.001 Ampere --> 2.001 Ampere No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Z1 = (Ea-V1)/I1 --> (29.38-17.5)/2.001
Evaluating ... ...
Z1 = 5.93703148425787
STEP 3: Convert Result to Output's Unit
5.93703148425787 Ohm --> No Conversion Required
FINAL ANSWER
5.93703148425787 ≈ 5.937031 Ohm <-- Positive Sequence Impedance
(Calculation completed in 00.006 seconds)
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Impedance Calculators

Positive Sequence Impedance using A-Phase EMF(LLGF)
​ LaTeX ​ Go Positive Sequence Impedance = (A Phase EMF-Positive Sequence Voltage)/Positive Sequence Current
Fault Impedance using Sequence Voltages and Zero Sequence Current(LLGF)
​ LaTeX ​ Go Fault Impedance = (Zero Sequence Voltage-Positive Sequence Voltage)/(3*Zero Sequence Current)
Negative Sequence Impedance(LLGF)
​ LaTeX ​ Go Negative Sequence Impedance = -Negative Sequence Voltage/Negative Sequence Current
Zero Sequence Impedance(LLGF)
​ LaTeX ​ Go Zero Sequence Impedance = -Zero Sequence Voltage/Zero Sequence Current

Positive Sequence Impedance using A-Phase EMF(LLGF) Formula

​LaTeX ​Go
Positive Sequence Impedance = (A Phase EMF-Positive Sequence Voltage)/Positive Sequence Current
Z1 = (Ea-V1)/I1

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 Positive Sequence Impedance using A-Phase EMF(LLGF)?

Positive Sequence Impedance using A-Phase EMF(LLGF) calculator uses Positive Sequence Impedance = (A Phase EMF-Positive Sequence Voltage)/Positive Sequence Current to calculate the Positive Sequence Impedance, The Positive Sequence Impedance using A-phase EMF(LLGF) formula is defined as a measure of the impedance of a three-phase electrical power system with respect to the positive sequence components of the system. Positive Sequence Impedance is denoted by Z1 symbol.

How to calculate Positive Sequence Impedance using A-Phase EMF(LLGF) using this online calculator? To use this online calculator for Positive Sequence Impedance using A-Phase EMF(LLGF), enter A Phase EMF (Ea), Positive Sequence Voltage (V1) & Positive Sequence Current (I1) and hit the calculate button. Here is how the Positive Sequence Impedance using A-Phase EMF(LLGF) calculation can be explained with given input values -> 7.936032 = (29.38-17.5)/2.001.

FAQ

What is Positive Sequence Impedance using A-Phase EMF(LLGF)?
The Positive Sequence Impedance using A-phase EMF(LLGF) formula is defined as a measure of the impedance of a three-phase electrical power system with respect to the positive sequence components of the system and is represented as Z1 = (Ea-V1)/I1 or Positive Sequence Impedance = (A Phase EMF-Positive Sequence Voltage)/Positive Sequence Current. A phase EMF is defined as the electromagnetic force of the a-phase in open conductor fault, 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 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 Positive Sequence Impedance using A-Phase EMF(LLGF)?
The Positive Sequence Impedance using A-phase EMF(LLGF) formula is defined as a measure of the impedance of a three-phase electrical power system with respect to the positive sequence components of the system is calculated using Positive Sequence Impedance = (A Phase EMF-Positive Sequence Voltage)/Positive Sequence Current. To calculate Positive Sequence Impedance using A-Phase EMF(LLGF), you need A Phase EMF (Ea), Positive Sequence Voltage (V1) & Positive Sequence Current (I1). With our tool, you need to enter the respective value for A Phase EMF, Positive Sequence Voltage & Positive Sequence Current and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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