Unlike oil immersed transformers, dry-type transformers can directly see the iron core and coil, while oil immersed transformers can only see the shell of the transformer. Using the power transformer manual can clearly check the precautions and use skills of the transformer, which can effectively prevent the explosion of the power transformer and achieve the maximum safety protection. Chinese substation exporters are well aware of the potential safety hazards. All goods are strictly and carefully inspected before export.