How to use your Socket tester check the Leakage current switch (RCD) detection?
Insert the tester into a correctly wired three-hole power socket, the RCD trigger current will be displayed on the display, press and hold the RCD button for more than 2 seconds, the normal leakage switch will trip at this time, if it does not trip, it means The leakage switch has failed. Please seek professional electrician maintenance in time.
