Asked by Celeste Tidwell on May 12, 2024
Verified
When connecting three transformers for three-phase use with a delta secondary, a voltage test should be done before closing the secondary. The correct voltage reading is _____.
A) the rated secondary voltage value
B) twice the rated secondary voltage value
C) zero volts
D) the sum of the three transformer primaries
Secondary Voltage
The output voltage of a transformer or another device that reduces or increases voltage from the primary voltage supplied to it.
Delta Secondary
A configuration for the secondary winding of a transformer where the ends of the coils are connected to form a triangle-like circuit, allowing it to supply both three-phase and single-phase load currents.
- Familiarize oneself with the special requirements for establishing connections of transformers to three-phase systems.
Verified Answer
ZK
Zybrea KnightMay 13, 2024
Final Answer :
C
Explanation :
In a delta secondary configuration, when measuring the voltage across any two points where the transformers are properly connected for three-phase use, the reading should be zero volts. This is because in a delta configuration, the phases are electrically continuous, and measuring across the same phase results in no potential difference.
Learning Objectives
- Familiarize oneself with the special requirements for establishing connections of transformers to three-phase systems.
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