Because the leakage protector is quite sensitive only need to reach 30mA will be tripped, the hospital's rescue room to treat the patients if they are operating because of the leakage protector triggered by the trip, it is a matter of life and death, so the hospital's emergency room did not use the leakage protection switch.
Medical equipment and modern medical diagnosis, treatment is increasingly close, any medical equipment are inseparable from a safe and stable power supply, and most of the switching power supply.