ZTELEC focuses on providing complete, reliable one-stop insulation material solutions for oil-immersed transformers.
The products are used for winding insulation, structural support, oil-duct spacing, and lead protection.
Insulation materials applied in oil-immersed transformers include：
Diamond dotted paper (DDP), Oil Duct Strip / Oil Strut Belt, Pressboard, Bakelite, Laminated wood, Phenolic paper tubes, Crepe paper,  crepe paper tubes, insulating kraft paper, Electrical cotton tapes, Electrical Polyester Shrinkable Tape, and other related insulating materials.

Through proper material selection and application design, ZTELEC’s insulation materials effectively enhance the electrical safety performance of transformers, improve heat dissipation, strengthen short-circuit withstand capability and structural stability, reduce dielectric losses, slow down insulation aging, and extend service life.
These solutions are widely used in distribution transformers, power transformers, and package substations, meeting the requirements of different voltage classes and operating environments.