What is the formula for finding line current in a Y connected load?

The correct formula for finding line current in a Y connected load is represented by the relationship IL = Ip. In a Y (or star) connection, the line current (IL) is equal to the phase current (Ip). This is due to the nature of Y connections where each load is connected between a phase and a neutral point.

In practical terms, since each phase carries the same current in a balanced load, the line current exiting the supply to the load is equal to the current flowing through each individual load. Therefore, understanding that the current remains the same through each leg of the connection is crucial.

For other options:

• The equation IL = 2Ip suggests the line current would be double the phase current, which does not apply to Y connections as it represents a different connection scheme.

• IL = Ip/2 implies that the line current is half of the phase current, applicable to a delta connection where the currents have a different relationship.

• The option IL = √3Ip applies to calculations in three-phase systems especially under delta configurations, where line current must account for the square root of three due to the phase relationship between currents in the system.

Understanding the relationship between the line current and phase current in a