Question 85Electricity & Electronics - 1st Asst/Chief

The correct answer is D. Temperature sensors inserted in the stator slots for measuring stator winding temperature are the most reliable means of monitoring generator temperatures to avoid premature winding insulation failure. This is because the stator windings are the most critical component for monitoring generator temperature, as overheating of the windings can lead to insulation failure and potential generator damage. Temperature sensors installed directly in the stator slots provide the most accurate and reliable temperature reading of the windings themselves. The other options, such as monitoring cooling air or water temperatures, are less direct and may not accurately reflect the winding temperatures.