Because medical equipment is used for people, the safety requirements are quite strict.  The reliability of the power supply plays a key role in the normal operation of the equipment.  The design of medical power supply has its special specification, especially for life support equipment with more demanding requirements.  In particular, it should be pointed out that the medical power supply, medical AC-DC power supply must meet the IEC61000-4-2+(electrostatic protection ability, the requirement of 3kV), IEC61000-4-3+(radio frequency radiation protection ability, the requirement of 3V/m), IEC61000-4-4+EFT+(voltage transient withstand ability,  Requirements to reach 1kV), IEC61000-4-+5+(mains inrush current bearing capacity, requirements to reach 1kV and 2kV), IEC61000-3-2+(mains line harmonic requirements) and IEC61000-3-3+(power line flicker requirements).  The Medical 60601 power supply provides a primary insulation barrier, low leakage current and sufficient safety distance to enable the product to meet these medically certified power supply standards.