Negative Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF) Solution

STEP 0: Pre-Calculation Summary
Formula Used
Negative Sequence Current = -Positive Sequence Current*((Zero Sequence Impedance+3*Fault Impedance)/(Zero Sequence Impedance+Negative Sequence Impedance+3*Fault Impedance))
I2 = -I1*((Z0+3*Zf)/(Z0+Z2+3*Zf))
This formula uses 5 Variables
Variables Used
Negative Sequence Current - (Measured in Ampere) - Negative Sequence Current consists of balanced three-phase current phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB 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.
Zero Sequence Impedance - (Measured in Ohm) - Zero Sequence Impedance consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counter clockwise together.
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.
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.
STEP 1: Convert Input(s) to Base Unit
Positive Sequence Current: 2.001 Ampere --> 2.001 Ampere No Conversion Required
Zero Sequence Impedance: 8 Ohm --> 8 Ohm No Conversion Required
Fault Impedance: 1.5 Ohm --> 1.5 Ohm No Conversion Required
Negative Sequence Impedance: -44.6 Ohm --> -44.6 Ohm No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
I2 = -I1*((Z0+3*Zf)/(Z0+Z2+3*Zf)) --> -2.001*((8+3*1.5)/(8+(-44.6)+3*1.5))
Evaluating ... ...
I2 = 0.779205607476635
STEP 3: Convert Result to Output's Unit
0.779205607476635 Ampere --> No Conversion Required
FINAL ANSWER
0.779205607476635 0.779206 Ampere <-- Negative Sequence Current
(Calculation completed in 00.004 seconds)

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16 Current Calculators

Positive Sequence Current using A-Phase EMF and Sequence Impedances(LLGF)
Go Positive Sequence Current = A Phase EMF/(Positive Sequence Impedance+(Negative Sequence Impedance*(Zero Sequence Impedance+3*Fault Impedance))/(Zero Sequence Impedance+Negative Sequence Impedance+3*Fault Impedance))
Negative Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF)
Go Negative Sequence Current = -Positive Sequence Current*((Zero Sequence Impedance+3*Fault Impedance)/(Zero Sequence Impedance+Negative Sequence Impedance+3*Fault Impedance))
Zero Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF)
Go Zero Sequence Current = -Positive Sequence Current*((Negative Sequence Impedance)/(Zero Sequence Impedance+Negative Sequence Impedance+3*Fault Impedance))
Positive Sequence Current using Positive Sequence Voltage (LLGF)
Go Positive Sequence Current = (A Phase EMF-Positive Sequence Voltage)/Positive Sequence Impedance
Zero Sequence Current using Sequence Voltages and Fault Impedance(LLGF)
Go Zero Sequence Current = (Zero Sequence Voltage-Positive Sequence Voltage)/(3*Fault Impedance)
B-Phase Current using B-Phase Voltage(LLGF)
Go B Phase Current = B Phase Voltage/Fault Impedance-C Phase Current
C-Phase Current using C-Phase Voltage(LLGF)
Go C Phase Current = C Phase Voltage/Fault Impedance-B Phase Current
Negative Sequence Current using Negative Sequence Voltage (LLGF)
Go Negative Sequence Current = (-1)*Negative Sequence Voltage/Negative Sequence Impedance
Zero Sequence Current using Zero Sequence Voltage (LLGF)
Go Zero Sequence Current = (-1)*Zero Sequence Voltage/Zero Sequence Impedance
Zero Sequence Current using B-Phase Voltage (LLGF)
Go Zero Sequence Current = B Phase Voltage/(3*Fault Impedance)
Zero Sequence Current using C-Phase Voltage (LLGF)
Go Zero Sequence Current = C Phase Voltage/(3*Fault Impedance)
Fault Current using B-Phase Voltage (LLGF)
Go Fault Current = B Phase Voltage/Fault Impedance
Fault Current using C-Phase Voltage (LLGF)
Go Fault Current = C Phase Voltage/Fault Impedance
B-Phase Current (LLGF)
Go B Phase Current = Fault Current-C Phase Current
C-Phase Current (LLGF)
Go C Phase Current = Fault Current-B Phase Current
Fault Current (LLGF)
Go Fault Current = B Phase Current+C Phase Current

Negative Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF) Formula

Negative Sequence Current = -Positive Sequence Current*((Zero Sequence Impedance+3*Fault Impedance)/(Zero Sequence Impedance+Negative Sequence Impedance+3*Fault Impedance))
I2 = -I1*((Z0+3*Zf)/(Z0+Z2+3*Zf))

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 Negative Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF)?

Negative Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF) calculator uses Negative Sequence Current = -Positive Sequence Current*((Zero Sequence Impedance+3*Fault Impedance)/(Zero Sequence Impedance+Negative Sequence Impedance+3*Fault Impedance)) to calculate the Negative Sequence Current, The Negative Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF) formula is defined as a concept in electrical engineering that refers to the flow of electric current in a three-phase power system where all three phases have the same magnitude and are equally spaced in phase angle. Negative Sequence Current is denoted by I2 symbol.

How to calculate Negative Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF) using this online calculator? To use this online calculator for Negative Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF), enter Positive Sequence Current (I1), Zero Sequence Impedance (Z0), Fault Impedance (Zf) & Negative Sequence Impedance (Z2) and hit the calculate button. Here is how the Negative Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF) calculation can be explained with given input values -> -0.438047 = -2.001*((8+3*1.5)/(8+(-44.6)+3*1.5)).

FAQ

What is Negative Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF)?
The Negative Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF) formula is defined as a concept in electrical engineering that refers to the flow of electric current in a three-phase power system where all three phases have the same magnitude and are equally spaced in phase angle and is represented as I2 = -I1*((Z0+3*Zf)/(Z0+Z2+3*Zf)) or Negative Sequence Current = -Positive Sequence Current*((Zero Sequence Impedance+3*Fault Impedance)/(Zero Sequence Impedance+Negative Sequence Impedance+3*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, Zero Sequence Impedance consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counter clockwise together, 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 & Negative Sequence Impedance consists of balanced three-phase impedance phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB rotation.
How to calculate Negative Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF)?
The Negative Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF) formula is defined as a concept in electrical engineering that refers to the flow of electric current in a three-phase power system where all three phases have the same magnitude and are equally spaced in phase angle is calculated using Negative Sequence Current = -Positive Sequence Current*((Zero Sequence Impedance+3*Fault Impedance)/(Zero Sequence Impedance+Negative Sequence Impedance+3*Fault Impedance)). To calculate Negative Sequence Current using Positive Sequence Current and Sequence Impedances(LLGF), you need Positive Sequence Current (I1), Zero Sequence Impedance (Z0), Fault Impedance (Zf) & Negative Sequence Impedance (Z2). With our tool, you need to enter the respective value for Positive Sequence Current, Zero Sequence Impedance, Fault Impedance & Negative Sequence 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 Negative Sequence Current?
In this formula, Negative Sequence Current uses Positive Sequence Current, Zero Sequence Impedance, Fault Impedance & Negative Sequence Impedance. We can use 1 other way(s) to calculate the same, which is/are as follows -
  • Negative Sequence Current = (-1)*Negative Sequence Voltage/Negative Sequence Impedance
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