In operation, the heat from the windings and core of an oil-immersed power transformer is first transferred to the oil, and then through the oil to the cooling medium. Cooling methods for oil-immersed power transformers, based on capacity, can be categorized as follows:
1. Natural oil circulation cooling (oil-immersed self-cooling)
2. Natural oil circulation cooling (oil-immersed air-cooling)
3. Forced oil circulation cooling (water cooling)
4. Forced oil circulation cooling (air cooling)
Normal Operating Conditions
1. Altitude not exceeding 1000m, indoor or outdoor
2. Maximum ambient temperature +40℃, maximum daily average temperature +30℃
3. Maximum annual average temperature +20℃, minimum temperature -25℃
4. Transformers for operation under special conditions can be provided upon request.
