What is the base temperature used for temperature correction in motor insulation resistance?

The appropriate base temperature used for temperature correction in motor insulation resistance is 40 degrees Celsius. This standard is established because insulation properties and resistance measurements can vary significantly with temperature, and 40 degrees Celsius is a commonly accepted reference point for assessing insulation resistance.

When performing tests on motor insulation, the resistance values obtained at different temperatures can be adjusted to reflect what they would be at this base temperature. This allows for consistent and comparable measurements, helping to ensure the reliability and longevity of the motor's insulation system.

Using a different base temperature, such as 30 degrees Celsius, 50 degrees Celsius, or 60 degrees Celsius, would not align with the established standards in the industry, leading to potential inaccuracies in evaluating insulation integrity. Therefore, 40 degrees Celsius is the correct choice for temperature correction in this context.