What is difference between line current and phase current?

Answer 1

A phase current is the current passing through a phase, whereas a line current is the current flowing through a line.

In the case of a balanced delta-connected load, IL = 1.732 IP. In the case of a balanced star-connected load, IL = IP.

For unbalanced loads, these relationships don't hold true, and must be individually calculated.

Answer 2

On a delta system the line current would be 1.732 times higher than the phase current. In a Wye system the line current and phase current are the same. In a parallel circuit (Delta) current divides. In a series circuit (Wye) current stays the same.

Another Answer

Line currents pass through line conductors, whereas phase currents pass through phases. 'Phases' are (in the case of a supply) are the windings of a three-phase alternator or (in the case of the load) are the loads themselves. 'Lines' are the three energised conductors that connect the load to the supply.

Answer 3

A 'phase current' is the name given to the current in a phase and a 'line current' is the name given to the current in a line.

'Lines' are the conductors that connect a three-phase load to a three-phase supply.

'Phases' are the individual windings in a machine, or the individual impedances that make up a three-phase load.

In the case of a star (wye) connected load, the line current is numerically equal to the phase current.

In a the case of a balanced delta connected load, the line current is 1.732 greater than the phase current.

Answer 4

Sqrt(3). Line current is 1.73 times phase current.

Answer

Line currents occur in the three lines (the conductors that connect the supply to the load). Phase currents occur in the phases (i.e. in the three individual loads, or in the three armature windings of the supply generator).

For a balanced wye-connected load, the line currents are numerically-equal to the phase currents.

For a balanced delta-connected load, the line currents are 1.732 times the phase currents.

Answer 5

IT depends upon the 3-phase connnection ..if it is

Y connection:line current = phase current

if it is delta connection: IL=(root 3)IPh