Isolation transformers provided With Copper isolation and are used to protect against electric shock, to suppress electrical noise in sensitive devices, or to transfer power between two circuits which must not be connected. This Shield Provided Between Primary And Secondary Winding For Protection of rectifier elements against voltage surges in winding. It is Used to Reduced current Densities to limit losses due to harmonic currents. It is also used to limit core losses due to harmonic fulx. An isolation transformer is a transformer used to distribute electrical power from a source of alternating current power to a number of equipment or device whereas isolating the powered apparatus from the power source, usually for protection reasons.