A-Phase EMF using Positive Sequence Current and Sequence Impedances(LLF) Solution

STEP 0: Pre-Calculation Summary
Formula Used
A Phase EMF = Positive Sequence Current*(Positive Sequence Impedance+Negative Sequence Impedance+Fault Impedance)
Ea = I1*(Z1+Z2+Zf)
This formula uses 5 Variables
Variables Used
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 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 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.
Negative Sequence Impedance - (Measured in Ohm) - Negative Sequence Impedance consists of balanced three-phase impedance 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 Current: 2.001 Ampere --> 2.001 Ampere No Conversion Required
Positive Sequence Impedance: 7.94 Ohm --> 7.94 Ohm No Conversion Required
Negative Sequence Impedance: -44.6 Ohm --> -44.6 Ohm No Conversion Required
Fault Impedance: 1.5 Ohm --> 1.5 Ohm No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Ea = I1*(Z1+Z2+Zf) --> 2.001*(7.94+(-44.6)+1.5)
Evaluating ... ...
Ea = -70.35516
STEP 3: Convert Result to Output's Unit
-70.35516 Volt --> No Conversion Required
FINAL ANSWER
-70.35516 Volt <-- A Phase EMF
(Calculation completed in 00.004 seconds)

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C-Phase Voltage (LLF)
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A-Phase EMF using Positive Sequence Current and Sequence Impedances(LLF) Formula

​LaTeX ​Go
A Phase EMF = Positive Sequence Current*(Positive Sequence Impedance+Negative Sequence Impedance+Fault Impedance)
Ea = I1*(Z1+Z2+Zf)

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.

How to Calculate A-Phase EMF using Positive Sequence Current and Sequence Impedances(LLF)?

A-Phase EMF using Positive Sequence Current and Sequence Impedances(LLF) calculator uses A Phase EMF = Positive Sequence Current*(Positive Sequence Impedance+Negative Sequence Impedance+Fault Impedance) to calculate the A Phase EMF, The A-phase EMF using Positive Sequence Current and Sequence Impedances(LLF) formula is defined as the electrical potential difference that is present in one phase of a three-phase electrical power system during a fault condition. A Phase EMF is denoted by Ea symbol.

How to calculate A-Phase EMF using Positive Sequence Current and Sequence Impedances(LLF) using this online calculator? To use this online calculator for A-Phase EMF using Positive Sequence Current and Sequence Impedances(LLF), enter Positive Sequence Current (I1), Positive Sequence Impedance (Z1), Negative Sequence Impedance (Z2) & Fault Impedance (Zf) and hit the calculate button. Here is how the A-Phase EMF using Positive Sequence Current and Sequence Impedances(LLF) calculation can be explained with given input values -> 108.134 = 2.001*(7.94+(-44.6)+1.5).

FAQ

What is A-Phase EMF using Positive Sequence Current and Sequence Impedances(LLF)?
The A-phase EMF using Positive Sequence Current and Sequence Impedances(LLF) formula is defined as the electrical potential difference that is present in one phase of a three-phase electrical power system during a fault condition and is represented as Ea = I1*(Z1+Z2+Zf) or A Phase EMF = Positive Sequence Current*(Positive Sequence Impedance+Negative Sequence Impedance+Fault Impedance). 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 Impedance consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation, Negative Sequence Impedance consists of balanced three-phase impedance 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 A-Phase EMF using Positive Sequence Current and Sequence Impedances(LLF)?
The A-phase EMF using Positive Sequence Current and Sequence Impedances(LLF) formula is defined as the electrical potential difference that is present in one phase of a three-phase electrical power system during a fault condition is calculated using A Phase EMF = Positive Sequence Current*(Positive Sequence Impedance+Negative Sequence Impedance+Fault Impedance). To calculate A-Phase EMF using Positive Sequence Current and Sequence Impedances(LLF), you need Positive Sequence Current (I1), Positive Sequence Impedance (Z1), Negative Sequence Impedance (Z2) & Fault Impedance (Zf). With our tool, you need to enter the respective value for Positive Sequence Current, Positive Sequence Impedance, Negative Sequence Impedance & 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 A Phase EMF?
In this formula, A Phase EMF uses Positive Sequence Current, Positive Sequence Impedance, Negative Sequence Impedance & Fault Impedance. We can use 3 other way(s) to calculate the same, which is/are as follows -
  • A Phase EMF = Positive Sequence Voltage+Positive Sequence Impedance*Positive Sequence Current
  • A Phase EMF = (Positive Sequence Voltage*(Positive Sequence Impedance+Negative Sequence Impedance))/Negative Sequence Impedance
  • A Phase EMF = (Fault Current*(Positive Sequence Impedance+Negative Sequence Impedance))/sqrt(3)
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