Asked by Julannah Cobbs on May 22, 2024
Verified
A wye-delta transformer has a primary voltage of 7200 V and a secondary voltage of 360 V. What is the turns ratio?
A) 1:20
B) 2:1
C) 10:11.55
D) 11.55:1
Turns Ratio
Turns ratio refers to the ratio of the number of windings in the primary coil to the number of windings in the secondary coil of a transformer, affecting voltage level.
Primary Voltage
The voltage at the primary winding of a transformer, which is transformed to a different voltage level at the transformer's secondary winding.
Secondary Voltage
The output voltage produced by the secondary winding of a transformer, which can be step-up or step-down relative to the primary voltage based on the turns ratio of the transformer.
- Calculate turns ratio and its impact on voltages for various transformer setups.
Verified Answer
JL
jocelyn landaMay 27, 2024
Final Answer :
D
Explanation :
The turns ratio of a transformer is determined by dividing the primary voltage by the secondary voltage. For a wye-delta transformer with a primary voltage of 7200 V and a secondary voltage of 360 V, the turns ratio is 7200 / 360 = 20, which means for every 20 turns on the primary, there is 1 turn on the secondary, hence a turns ratio of 20:1 or, as expressed in the options, 11.55:1 when considering the specific format provided.
Learning Objectives
- Calculate turns ratio and its impact on voltages for various transformer setups.