45results about How to "Prevent illegal opening" patented technology

The utility model belongs to the technical field of voltage transformers, and particularly relates to an outdoor 20-kilovolt lightweight voltage transformer. The transformer comprises a rectangular iron core on which a primary coil and a secondary coil are wound; a cast aluminum junction box is arranged on the side surface of the totally-closed shell; a stainless steel waterproof joint is arranged on one side of the totally-closed shell; a steel wire type lead sealing rope is fixedly arranged outside the cast aluminum junction box for locking; the primary coil is connected with an A-phase connecting line; the A-item connecting line is connected with an M10 primary bolt; the N-phase connecting line is connected to the M8N terminal bolt, the secondary coil is connected with two secondary an connecting lines, the two secondary an connecting lines are connected to the M6 secondary terminal bolt, and the front grounding connecting line is connected to the M8 grounding bolt. The anti-theft door is light in weight, high in protection performance, easy to install, high in anti-theft performance, high in reliability and good in safety and economical efficiency.