Which of the listed temperature measuring devices installed on a large turbo-electric alternating current propulsion generator would be the most reliable for monitoring generator temperatures to avoid premature winding insulation failure?
ā¢ Heat is what damages winding insulation, so the best device directly measures what you most need to protect. ā¢ Consider the difference between measuring cooling medium temperature (air or water) and measuring the actual winding temperature. ā¢ Think about what a current transformer (CT) does in a power system and whether it is truly a temperature sensor.
ā¢ Which option measures the temperature of the component that actually fails (the windings) rather than the temperature of the cooling system around it? ā¢ If the cooling air or water stays cool but circulation is poor, which sensor might miss a hot spot in the windings? ā¢ Does a current transformer provide a direct temperature reading, or does it measure something else that might only be loosely related to temperature?
ā¢ Identify which choice gives the most direct indication of winding temperature, not just surrounding conditions. ā¢ Eliminate any option that measures only the cooling medium instead of the generator windings themselves. ā¢ Confirm whether a current transformer is a temperature-measuring device or a current-measuring device.
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