The requirement of reliability and power supply quality for the power supply of clinical laboratory in the hospital is very strict. harmonics, high-frequency interference, electromagnetic compatibility, leakage current, and others in the power grid will lead to errors in the detection results of medical equipment, resulting in medical accidents, and in serious cases, equipment damage. The scheme can be used for imaging department, radiation room, dialysis room, color ultrasonic room, CT, nuclear magnetic resonance, and other scenes.