Intensive care special power unit - has DC power supplied from isolated mains unit or HF AC supply well above mains

摘要

The special power supply for the reduction of risk of electric shock is of special use in medical intensive-care units and generally meets the safety requirements of VDE 0107. The first method consists of a DC power supply supplied from an isolated mains unit remote from the operating a area, for powering electronic test gear, instruments, small motors, tools, lamps and the like. The second version entails a power supply using a special unit operating at a frequency well above mains 50 or 60 Hz i.e. in the region of 10 kHz so that in the case of accidental shock, no alternating currents at frequencies critical to the operation of human heart muscles are present.