Distribution Transformers: 10 kVA – 5.000 kVA (up to 36 kV)
Power Transformers: 5.000 kVA – 100 MVA (up to 154 kV)
Dry Type (Cast – Resin) Transformers: 50 kVA – 5.000 kVA (up to 36 kV) according to IEC 60076 standards.
- CONSERVATOR TYPE TRANSFORMER
Conservator Type Transformers are open to atmosphere, three phase or single phase, oil immersed, ONAN, ONAF, with Off-Load or On-Load Tap Changer, both externally and internally.
- HERMETICALLY SEALED TYPE TRANSFORMER
Hermetically Sealed Transformers are closed to atmosphere, three phase or single phase, oil immersed, ONAN and/or ONAF, with Off-Load or On-Load Tap Changer, both externally and internally.
Changes in voltage is supplied automatically by On-Load Tap Changer. PEGUMBA uses MR GERMAN or HYUNDAI EUROPE On-Load Tap Changers. Number of steps at On-Load Tap Changer are designed between 9 – 35 considering the needs of end users.
System can be controlled automatically via microprocessor-based automatic voltage requlator (AVR) without the need for intervention of an operator and voltage output precision can be adjusted under energy from remote by operator; tap changing can easily be made manually when needed and enables remote control and monitoring.
During tap changing operation, a constant stable voltage without voltage fluctuations is offered to users. Tap changer units have electrical and mechanical structure which do not require maintenance for years and these units have successfully passed the tests performed at international laboratories that proves their qualities.
Transformers with On-Load Tap Changer transformers are manufactured with expansion tanks and used as internal type.
DRY TYPE (CAST-RESIN) TRANSFORMERS
Dry-type transformer winding insulation systems can be either of standard open-wound ‘dip-and-bake’ construction or of higher quality designs that include vacuum pressure impregnation (VPI), vacuum pressure encapsulation (VPE), and cast coil encapsulation processes. In the VPI process, a combination of heat, vacuum and pressure is used to thoroughly seal, bind, and eliminate entrained air voids in the winding polyester resin insulation coat layer, thus increasing resistance to corona. VPE windings are similar to VPI windings but provide more protection against environmental effects, such as from water, dirt or corrosive ambients, by multiple dips including typically in terms of final epoxy coat.