In a three-phase, wye-wye connected...

Question 1 / 270705eccefa4bacbc34ba4d4813c

Question 1 of 270705eccefa4bacbc34ba4d4813c

In a three-phase, wye-wye connected transformer, what is the relationship between line current and phase current?

Question 1 of 27070

In a three-phase, wye-wye connected transformer, what is the relationship between line current and phase current?

🔍 Key Concepts

• Wye (star) connection relationships between line and phase quantities • How currents split or combine at a wye neutral point • Difference between current relationships in wye vs voltage relationships in delta

💭 Think About

• In a wye connection, is each line conductor in series with one phase winding or shared between two windings? Visualize or sketch the connection. • If the three phase currents are balanced and 120° apart, how does that affect the current in each line compared to the current in each phase winding? • Think about whether currents in a wye junction add, subtract, or remain the same in each branch under balanced conditions.

✅ Before You Answer

• Be clear on what is meant by line current (current in the external line conductors) vs phase current (current in each transformer winding). • Confirm that in a wye system, each line is connected directly to one end of a single phase winding, with the other end going to the neutral point. • Make sure you are not confusing the wye current relationship with the sqrt(3) relationship that applies to voltages in wye or currents in delta.

Question 1 of 27070

In a three-phase, wye-wye connected transformer, what is the relationship between line current and phase current?

the line current is equal to the phase current

the line current is three times the phase current

the line current is equal to the sum of any two phase currents

the line current is equal to the difference of any two phase currents

Question 1 / 270705eccefa4bacbc34ba4d4813c

Question 1 of 270705eccefa4bacbc34ba4d4813c

In a three-phase, wye-wye connected transformer, what is the relationship between line current and phase current?

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Question 1 of 27070

In a three-phase, wye-wye connected transformer, what is the relationship between line current and phase current?