1. The transformer itself needs to be tested to be qualified and there is no oil leakage.
2. The transformer needs to be equipped with a small hole for the vehicle temperature, so that a mercury thermometer can be inserted into it to measure the temperature.
3. The shell needs to reach the corresponding protective grounding device.
4. A nameplate is also required on the transformer, and the coil grounding diagram and wiring group must be clearly written on it. In addition, a picture of the top cover is required, which can clearly show the difference of the lines and the joints, or the wiring diagram of the coil near the casing can be led out to correspond to different symbols.
5. Transformers reaching more than 100,000 volt-amperes also need to be equipped with oil pillows and glass oil level gauges. The oil level gauge needs to be marked with three monitoring lines to clearly show the temperature of the transformer oil level in the **, normal and ** environments.
6. The transformer needs to be equipped with high-voltage drop fuse and valve arrester. The performance of the fuse must meet the corresponding requirements, mainly referring to the rated current, the limitation of the fuse current, and the sensitivity and selectivity.
7. Any transformer needs its own technical information and card.
