Métodos de diagnóstico de averías para transformadores con cambiadores de tomas en carga

There is a great variety of diagnosis techniques for on load tap changer (OLTC), some of them can be used only in power transformers off-line and other techniques in power transformers online. This paper describes the different failure diagnosis method on OLTC, and gives a report of the implementation of the diagnosis method of vibration measurement into the transformer tank.