title: Automation of the temperature elevation test in transformers with insulating oil.
abstract: The automation of the temperature elevation test is outlined here for both the oil temperature elevation and the determination of the winding temperature elevation. While automating this test it is necessary to use four thermometers, one three-phase wattmeter, a motorized voltage variator and a Kelvin bridge to measure the resistance. All the equipments must communicate with a microcomputer, which will have the test program implemented. The system to be outlined here was initially implemented in the laboratory and, due to the good results achieved, is already in use in some transformer manufacturing plants.
authors: UNIFEI/ISEE-Federal University of Itajubá, P.O Box: 50, 37500-903 Itajubá, MG, Brazil. manuel@unifei.edu.br <manuel@unifei.edu.br>
authors: José Manuel Esteves
authors: JM
authors: Vicente
authors: Angelo José Junqueira
authors: AJ
authors: Rezek
authors: Antonio Tadeu Lyrio
authors: AT
authors: de Almeida
authors: Carlos Alberto Mohallem
authors: CA
authors: Guimarães
mesh_terms: D000465:Algorithms; D004581:Electronics; D008838:Microcomputers; D009821:Oils; D013696:Temperature; D013816:Thermodynamics
chemical_list: D009821:Oils