Question 573Electricity & Electronics - Assistant Engineer

The correct answer is A) Temperature sensors inserted in the stator slots for measuring stator winding temperature. The stator windings are the most critical component in a generator, as their insulation is susceptible to premature failure due to overheating. Temperature sensors placed directly in the stator slots provide the most accurate and reliable measurement of the winding temperatures, allowing for effective monitoring and prevention of overheating issues. The other options, such as monitoring cooling air or water temperatures, are less reliable as they do not directly measure the critical winding temperatures. Current transformers, while useful for other purposes, are not the most appropriate method for monitoring generator temperatures to avoid insulation failure.