The correct answer is D. Any of the above.
The temperature rise of windings and other parts may be determined by any of the following methods:
- Thermometer method: A thermometer is placed in contact with the winding or other part to measure its temperature.
- Resistance method: The resistance of the winding or other part is measured and used to calculate its temperature.
- Embedded temperature detector method: A temperature sensor is embedded in the winding or other part to measure its temperature.
The best method to use depends on the specific application. For example, the thermometer method is simple and inexpensive, but it can be inaccurate if the winding or other part is not in good thermal contact with the thermometer. The resistance method is more accurate, but it requires more specialized equipment. The embedded temperature detector method is the most accurate, but it is also the most expensive.