Electrician Red Seal · Question
What is the primary function of a transformer's overcurrent protection on the primary side?
The overcurrent device on the primary side (e.g., a fuse or circuit breaker) is sized to protect the transformer itself from damage due to excessive current cau
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Question: What is the primary function of a transformer's overcurrent protection on the primary side?
Answer options:
- To protect the load connected to the secondary. ✅ To protect the transformer windings from overloads and short-circuits.
- To provide overload protection for the secondary conductors.
- To limit the transformer's inrush current.
Correct answer: To protect the transformer windings from overloads and short-circuits.
Explanation: The overcurrent device on the primary side (e.g., a fuse or circuit breaker) is sized to protect the transformer itself from damage due to excessive current caused by overloads or faults in the transformer or on its secondary.
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