Diseño y construcción de dos transformadores monofásicos para suministro trifásico en conexión delta abierta con control de voltaje mediante taps fijos para el laboratorio de sistemas eléctricos de potencia

Abstract

The present technical study deals with the design and construction of a bank of two single-phase dry type transformers with an individual capacity of 2.5 kVA, with voltages in the primary and secondary winding of 220 V. The transformation ratio in the nominal tap is 1: 1, to make the connection in open delta. Through a manual mechanism for switching fixed taps located in one of the windings, a variation of ± 5% is available in steps of 2.5%. This project arises from the need to have a scale model of an Electric Power System that allows to practice three-phase transformers in open delta connection in the Power Electrical Systems Laboratory of the National Polytechnic School. The construction of the single-phase transformers allows to understand the performance and operation of the transformers bank in open delta connection to continue with the three-phase supply to the load.