AC machines should have proper _______ in order to limit the operating temperature.
AC machines should have proper _______ in order to limit the operating temperature.
Show Hint
- Voltage rating
- Current rating
- Speed
- kW rating
The Correct Option is B
Solution and Explanation
Step 1: The operating temperature of an AC machine is primarily influenced by the losses, such as copper losses (\( I^2R \)) and iron losses.
Step 2: Copper losses are directly proportional to the current flowing through the windings. A higher current leads to increased resistive heating, raising the temperature.
Step 3: If the machine operates beyond its rated current, it will overheat, possibly damaging the insulation and reducing the overall efficiency.
Step 4: A proper current rating ensures that the machine operates within safe thermal limits, maintaining its efficiency and prolonging its service life.
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