Transformer Tank / CAP
The walls of the transformer tanks: according to project criteria, they are manufactured generally from corrugated steel for distribution transformer. The corrugated steel thickness is 1, 25 mm or 1, 50 mm. Generally Cap and transformer tank are manufactured of hot rolled steel pallet. The tank oil drain valve and two cross skids carrying the wheels are located in lower epoxy based two-component paint part and the wheels are 90 rotatable in order to push the transformer at both directions. After completion of welding the first leakage test is performed on the tank.
Transformer Cover: Steel bolt, cap nut and spring washer, cover gasket are installed upper side of tank. On top of the cover there are HV and LV bushings, conservator, thermometer pocket and filling pipe etc. The off-load tap changer is assembled over the cover. In hermetic transformer in spite of there is not Buchholz relay, there is a hermetic protective relay.