What are the reasons for abnormal AT oil temperature?
1 Answers
Transmission oil temperature is too high, and the transmission enters protection mode. Below are the specific details: 1. Internal failure: Internal failure causes abnormal temperature. Precision castings may have internal faults, such as inter-turn or inter-layer short circuits in windings, coil discharge to barriers, overheating of internal lead joints, multiple grounding points in stainless steel castings increasing eddy current and overheating, and leakage magnetic flux forming loops with iron tanks through unbalanced zero-sequence current, all of which can cause abnormal temperature in the transformer. In such cases, gas or differential protection may also be triggered. 2. Cooler malfunction: Abnormal temperature caused by improper cooler operation. Cooler malfunction or failure, such as submerged oil pump shutdown, fan damage, radiator pipe scaling, poor cooling efficiency, unopened radiator valves, or faulty thermometer readings, can lead to temperature rise. The cooler system should be maintained and flushed to improve its cooling performance.