The Circuit Design of Residual Voltage Test For Electric Products

Many national standards have requirements about the maximum value of residual voltage for electrical equipments[1], it requires to measure residual voltage accurately, the human body may have a certain degree of security risk if the measured value is lower than the truth value of residual voltage, but if the measured value is higher than the truth value, it may reduces the production pass-rate of electrical equipments. Make a design for residual voltage tester, on the basis of literature review and hardware test. The main task is to introduce overall design plan and difficulties of residual voltage tester.