We offer vpi dry type transformer. Descriptionthese transformers are specifically needed in distribution network for feeding basements or stilts of high-rise buildings, hotels, malls, stadium, air ports, chemical & refinery plants. Following are the dimensional, weight & quantity details along with standard losses for conventional 11kv & 22kv dry type (vpi) transformer (off circuit type). Technical specificationsduty type- outdoor indoor ground mounted typevoltage class- upto 22 kvno of phases- 3 phasefrequency- 5060 hzvector group- dyn1 or dyn5 or dyn11 or any specificclass of insulation- f or h with temp rise of 90 or 115 deg c or as per customer requirementtap changer type- off circuit type or on load typetapping range- + 2.5% x 2 for octc or + 2.5% x 2 & - 2.5% x 6 for oltc or as per customer requirementwinding material- aluminium or copper with multi paper nomex-aramid coveringapplicable standards- is 11171, iec 60726enclosure painting- powder coated with ral 7032 shade or as per customer requirement assured featureswindings are electrically balanced to minimize axial & radial short circuit forces. Coils are held rigidly in place between insulators clamped to the upper and lower core frames under high compression. Polyester resin or thixotropic epoxy resin impregnation or silicon varnish as per the application is used. High temperature resistant materials are used including nomex aramid papers, silicone coated fibre glass and pressure sensitive glass tape. Adequate ducts between coils, discs for maximum air flow and reduced hot spot temperature. Step-lap designed crgo laminations for lower losses and excitation current.
Navi Mumbai, Maharashtra, India
