Outdoor Distribution Transformer Normal Operation

In order to ensure the safe operation and reliable power supply of the outdoor distribution transformer, when the abnormal situation of the transformer occurs, it can be found in time, dealt with in time, and the fault can be eliminated in the bud to prevent the occurrence and expansion of the accident. Therefore, the outdoor distribution transformer in operation must be regularly inspected. Tour inspections, and make a record of the operation.

1.Rated operation mode. Under the specified cooling conditions, the outdoor distribution transformer can operate according to the nameplate specifications. The allowable temperature of the oil-immersed transformer in operation should be checked according to the upper oil temperature. The oil temperature of the upper layer shall comply with the manufacturer's regulations, but the maximum shall not exceed 95°C. In order to prevent the transformer oil from deteriorating too quickly, the upper oil temperature should not exceed 85°C frequently.

The applied voltage of the outdoor distribution transformer should generally not exceed 105% of the rated value. At this time, the secondary side of the transformer can carry the rated current. In individual cases, after testing or with the agreement of the manufacturer, the applied voltage may be 110% of the rated voltage.

2.Overload is allowed. Transformers can operate under normal overload or accident overload conditions. Normal overload can be used frequently, and its allowable value is determined according to the load curve of the outdoor distribution transformer, cooling conditions, and the load of the transformer before overload, etc. Accident overloads are only allowed in accident situations (transformers that are still operational).