Electrician Red Seal · Question
What is the primary purpose of a step-up transformer in a power generation substation?
Step-up transformers increase the voltage from the generator to very high levels for efficient long-distance transmission. Higher voltages result in lower curre
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Question: What is the primary purpose of a step-up transformer in a power generation substation?
Answer options:
- To decrease voltage for local distribution.
- To increase current for transmission efficiency. ✅ To increase voltage for efficient long-distance transmission.
- To convert AC to DC power for industrial loads.
Correct answer: To increase voltage for efficient long-distance transmission.
Explanation: Step-up transformers increase the voltage from the generator to very high levels for efficient long-distance transmission. Higher voltages result in lower currents for the same power, which reduces I²R losses in the transmission lines. Step-down transformers decrease voltage for distribution, and transformers do not convert AC to DC.
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