The A1507 active 3-phase test adapter is an accessory for automating the electrical safety testing of three-phase circuits. In combination with Auto Sequences and one of Metrel's installation testers, MI 3155 EurotestXD or MI 3152 EurotestXC, it is possible to further automate the process of 3-phase system testing. https://elecena.pl/product/18138754/20992752-active-3-phase-test-adapter-a1507 2021-04-30 https://elecena.pl/product/18138754/20992752-active-3-phase-test-adapter-a1507 2025-04-08