What is the maximum safe temperature for transformer insulating material?

The maximum safe temperature for transformer insulating materials is typically set to ensure the longevity and reliability of the equipment. Insulating materials are designed to withstand a certain level of heat without degrading, which could lead to failures over time.

The choice of 105°C (221°F) is particularly significant because it reflects common industry standards for various types of insulation used in transformers. These materials, depending on their classifications, can safely operate at specific temperature limits to maintain performance without risk of thermal breakdown. Exceeding this temperature could lead to insulation degradation, increased risk of electrical faults, or even fire hazards.

Therefore, 105°C is seen as a safe operating limit for many insulating materials in transformers, making this the best answer to ensure that equipment operates reliably and safely over its intended lifespan.