Automatic CNC Machine for winding. Foil winding for low voltage. PICC for high voltage windings. Bunch or CIC for power.
Cut core laminations are stacked together in a step lap pattern to reduce the losses,
excitation current and noise.
Core Coil Assembly and Tap changer connection are made prior to the dying process. Ratio, magnetic process and vector group is checked. Scrambled it to make a type specimen book.
Core Coil Assemblies are dried under vacuum to remove moisture. Over for drying active part is computerized and can cater up to 132kV class. The type of kV class is selected at menu. The process is automatic. After the completion of the process the CA is taken for tanking process, scrambled it to make a type specimen book.
Tanks are fabricated with mild steel. The welds are leak free and as per SA 2½ all tanks are checked by ultraviolet ray dye penetrant test to ensure zero leakage.
Shot blasting process removes mill and welding scale. A Zino-rich primer coat is applied immediate after short blasting to eliminate rust formation. After the first coat is dried, a second coat is applied. Painting is done by flood painting process.
Transformers are filled with filtered transformer oil under vacuum to the required level. After the tanking process, testing is done to ensure transformers are leak free.