Running on power from circuit until circuit breaker trips, TFT100 Fault Trapper™ detects type of fault, timestamps when fault happens, and locates position of electrical event that caused intermittent/persistent circuit breaker trips and No Fault Found conditions. Tester provides in-line monitoring of dedicated circuits up to 300 Vac and 40 A, and allows unattended monitoring to identify electrical events. Using back-up battery, tester enables unpowered display of results.