# Sequence Current Calculator, Formula, Sequence Current Calculation

## Sequence Current Calcuator:

Enter the values of voltage, Vseq(V) and impedance, Zseq(Ω) to determine the value of Sequence current, Iseq(A).

 Enter Sequence Voltage: V Enter Impedance: Ω Result – Sequence Current: A

## Sequence Current Formula:

Sequence current refers to the components of an unbalanced three-phase system, which can be decomposed into three sets of balanced phasor components: positive sequence, negative sequence, and zero sequence.

In power system analysis, symmetrical components are used to decompose unbalanced phasors into three sets of balanced phasors: positive sequence, negative sequence, and zero sequence components.

These are the voltages associated with each sequence component. Vseq can be positive sequence voltage, negative sequence voltage or zero sequence voltage.

These are the impedances corresponding to each sequence component. Zseq can be positive sequence impedance, negative sequence impedance or zero sequence impedance.

Positive Sequence represents the balanced condition where the phases are in the normal order (A-B-C).

Negative Sequence represents the condition where the phases are in reverse order (A-C-B).

Zero Sequence represents the condition where all three phases are in phase with each other. The sequence current is calculated using Ohm’s law applied to each sequence component.

Sequence current, Iseq(A) in amperes is calculated by voltage, Vseq(V) in volts divided by impedance, Zseq(Ω) in ohms.

Sequence current, Iseq(A) = Vseq(V) / Zseq(Ω)

Iseq(A) = sequence current in amperes, A.

Vseq(V) = sequence voltage in volts, V.

Zseq(Ω) = impedance in ohms, Ω.

### Sequence Current Calculation:

1. Calculate the sequence current for a circuit with a voltage of 100 volts and an impedance of 20 ohms.

Given: Vseq(V) = 100V, Zseq(Ω) = 20 Ω.

Sequence current, Iseq(A) = Vseq(V) / Zseq(Ω)

Iseq(A) = 100 / 20

Iseq(A) = 5A.

1. Suppose a sequence current of 2 amperes flows through a circuit with an impedance of 15 ohms. Calculate the voltage.

Given: Iseq(A) = 2A, Zseq(Ω) = 15 Ω.

Sequence current, Iseq(A) = Vseq(V) / Zseq(Ω)

Vseq(V) = Iseq(A) * Zseq(Ω)

Vseq(V) = 2 * 15

Vseq(V) = 30V.