How are RCD Testers Used and Features to Consider in RCD Testers
RCD and appliance testers that have RCD trip features work by simulating current leakage in order to accurately measure the amount of time needed for the appliance or RCD to cut power. The trip time recorded by the tester determines whether the appliance or RCD meets the AS/NZS3760:2010 requirements, which demand the RCD or appliance's trip time is as low as 40 milliseconds. The most frequently used RCD tests require a trip time test at the rated current of the RCD itself. The fault current needs to be quickly applied by the tester. In most cases, the RCD is sensitive to 30mA, even though in some applications, like medical institutions, 10mA sensitive RCDs may be used. In other cases, variable trip current RCDs are used.
12 July, 2022