First of all, when the transformer and the low-voltage distribution cabinet are installed side by side, the protection level of the shell is not less than IP3X, and when the transformer is installed separately, the protection level is not less than IP2X. The second is the production of dry type transformer core, sleeve surface should have no spark discharge trace; The second is the production of dry-type transformer bushing, insulator outside no damage, crack;
Then dry type transformer winding castable body without cracks and attached dirt; The most important is the dry transformer core, the casing surface without serious pollution phenomenon;
Finally, we must ensure that each dry transformer produced by Jiangsu Liwang Electric Co., Ltd. is sound normal. It's ready to go out of the factory