Troubleshooting substation with transformer

Found the following cases, the emergency disconnect each side of the transformer power supply: Internal strongly inhomogeneous noise and the sound of the spark discharge; conservator or spill-proof tube; casing burst, flashover discharge exaggerating; Oil and gas meter relay do not see the oil level; under normal load conditions, the temperature swells,  electri cenergy meter  the allowable value; If the standby power switch automatically when the power loss in the transformer, check switch is good;  power transformers  the high voltage side of the transformer isolation switch, it is checked if the switch into standby transformer should be good to keep the power supply. If the high voltage transformer fuse breaking work should be put into standby transformer, then opened the work on both sides of the transformer isolation switch, check its associated equipment to determine the cause of the accident.