The S20-20000KVA/35KV/10KV oil-immersed transformers are equipped with H-grade insulation materials. Typically, the S20-20000KVA/35KV/10KV oil-immersed transformers operate at a maximum temperature of 130℃. The temperature control settings for the S20-20000KVA/35KV/10KV oil-immersed transformers during normal operation are as follows: automatic fan shutdown at 80℃, automatic fan startup at 100℃, high-temperature alarm at 130℃, and over-temperature trip at 150℃.