AUTOMATIZACIÓN DEL PROCESO DE DECAPADO Y FOSFATADO PARA ESTRUCTURAS DE TRANSFORMADORES DE BAJA Y MEDIA TENSIÓN

Abstract

In the present work it is shown the design of an automation system for the pickling and phosphating process for transformers structures of low and medium voltage. The process involves the use of a two-ton hoist, whose movement is controlled by a PLC. Automation of the process begins when the transformers are placed in the reception area, once here they should be mobilized with help of the hoist to five tubs which contain different substances that are part of the cleaning process and preparation of transformers. Automation of the process includes: the hoist motion control, control filling, how long to stay transformers in the tubs and a PID control to the temperature of the phosphating tub of the transformers. In the project it was used the S71200 PLC Siemens with the software TIA Portal v.12.0. In addition, it was developed a SCADA system for visualization and control of process parameters. The scope of the project involves the establishment of a control architecture, programming, implementation of the relevant electrical drawings, the realization of a SCADA system and the respective cost analysis concerning to the development of the project.