PURPOSE: A transformer is provided to prevent formation of pollutants by replacing oil, which is used as an insulation oil in an existing transformer for a power source, with an epoxy resin. CONSTITUTION: A bushing(110) performs functions that insulates and draws out a coil. A core(120) is composed of metal materials. A primary side coil is wound around a part of the core. A secondary side coil is wound around a part of the core to correspond to the primary side coil. A container(150) comprises a waterproof epoxy resin.
