Schneider transformer is an electrical device that plays an important role in electricity supply for industry and housing. The transformer is able to increase or decrease the voltage so as not to damage electronic equipment. Transformers use electromagnetic components that can change high to low voltage or vice versa in the same frequency. Transformers are the heart of distribution and transmission which are expected to operate optimally (continuous work without stopping). In order to function properly, eating a transformer must be properly maintained and maintained using the right systems and equipment.