Digital FI Tester for release characteristics. Residual current circuit breakers are used for personal protection and switch off a circuit when a residual current is registered which flows off via the protective earth (PE). This residual current tester determines the tripping current and the tripping time of residual current circuit breakers, which according to current building regulations are used in every new building. The different selectable test currents and characteristics of the FI allow a flexible use of this measuring instrument. FI testers allow a fault current to flow and determine at which fault current the FI reacts. The tripping time is also measured. These two parameters, tripping current and tripping time, are the safety-relevant parameters of a residual current circuit breaker. https://elecena.pl/product/19037575/p-1665-digital-fi-rcd-tester 2021-07-11 https://elecena.pl/product/19037575/p-1665-digital-fi-rcd-tester 2023-02-15 https://elecena.pl/product/19037575/p-1665-digital-fi-rcd-tester 2025-04-07 https://elecena.pl/product/19037575/p-1665-digital-fi-rcd-tester 2025-09-06