What is the thermal class of a transformer?

The thermal class of a transformer typically refers to the thermal stability of its insulation system, a crucial factor directly impacting the temperature endurance during prolonged operation. This classification is commonly denoted by letters such as A, E, B, F, H, each representing a specific maximum temperature level. In the design process of transformers, careful consideration is given to selecting an appropriate thermal class to ensure the transformer maintains excellent performance and reliability under normal operating conditions.

Opting for a higher thermal class can enhance the transformer's load-carrying capacity, but it may also result in increased manufacturing costs. Therefore, a balanced consideration is essential in transformer design to ensure that the chosen thermal class meets performance requirements without excessively raising production costs. This equilibrium aims to maximize the transformer's performance and reliability while ensuring normal operation.

LuShan, est. 1975,  is a Chinese professional manufacturer specializing in power transformers and reactors for 48 years. Leading products are single-phase transformer, three-phase transformers, DC inductors, AC reactors, filtering reactor, expoxy resin high-voltage transformer and intermediate, high-frequency products. Our transformers and reactors are widely used in 10 application areas: rapid transit, construction machinery, renewable energy, intelligent manufacturing, medical equipment, coal mine explosion prevention , excitation system, vacuum sintering, central air conditioning.

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