Abnormal transformer operation and accident handling

First, abnormal operation of the transformer

1. On-duty personnel found any abnormal phenomena (such as oil leakage, high or low oil level change, abnormal temperature, abnormal sound, and abnormal cooling system) during transformer operation. They should try to eliminate it as soon as possible and report it promptly. Long, long. The situation should be recorded in the duty operation record book and equipment defect record book.

2. If it is found that anomalous phenomena must be discontinued by the transformer in order to deal with it, and there is a possibility of threatening the overall safety, it should apply for scheduling and agree to immediately stop the repair.
 

(a) The transformer sound is abnormal

1. When the transformer is running, it should be a uniform hum noise. If the transformer produces uneven sound or abnormal sound, it belongs to abnormal sound.

2. Transformer overload: The transformer makes a heavy "click".

3. Transformer load changes drastically: The transformer emits a heavier "wow" or "grilling" burst of intermittent sound

4. System short-circuit: The transformer emits a lot of noise, and the watchman should strengthen the monitoring of the transformer.

5. Overvoltage occurs in the power grid: When the transformer emits rough noise, the watchman can use the voltmeter to instruct comprehensive judgment.

6. Loosening of transformer core clamps: The transformer emits hammering and wind-like sounds such as “jingle bells” and “whistling bells”. At this time, the transformer oil level, oil temperature, and oil color are all normal.

7. The internal fault discharge of the transformer sparks: The transformer emits a "beep" or "beep" sound. At this time, the power should be cut off and a color analysis of the insulating oil should be performed.

8. Insulation breakdown or turn-to-turn short circuit: Inhomogeneous cracking sounds in the sound of transformers and boiling sounds of “咕噜咕噜” should be dealt with in a blackout and analyzed by colorization of insulating oil.

9. Discharges caused by external climate: Blue corona or sparks from the casing emits a “squeaking” or “squeaking” sound, indicating that the porcelain is dirty or the equipment line card is in poor contact. Monitoring should be intensified. deal with.