Measuring instrument which checks the qualities of a FI switch (RCD). In particular, it measures the contact voltage, the turn-off time and turn-off current of FI switches of A, AC, S types and recently also the mixed frequency type F. Features - Digital display, backlit, colour OLED display - LED for measurement point illumination - Patented means of securing test probes - Compact and robust - for service calls under harsh conditions and laboratory use Tests Tests fault current protection device (RCD circuit breakers) - Measures the contact voltage without triggering the switch. Contact voltage is measured with reference to nominal fault current using 1/3 of the nominal fault current value. - Trip test with nominal fault current, measurement of the tripping time Special tests of systems and/or RCD circuit breakers - Tests systems and/or RCD protection circuits with increasing fault current, displaying the trip current - Tests RCD circuit breakers IdeltaN = 10, 30, 100, 300, and 500 mA - Tests RCD circuit-breakers with 1/2 IdeltaN IdeltaN, 1, 2, 5 IdeltaN IdeltaN to 100 mA nominal current) - Tests RCD circuit breakers with half-waves (pulsating direct current) to determine the trip time and the trip current Tests special RCD circuit breakers - Selective S, type AC (not allowed in Germany), Type A Measures mains voltage and fault loop impedance Delivery: Test instrument with mobile test probe including four batteries (AAA), carrying case, quick start guide, CD-ROM with operating instructions, works calibration certificate https://elecena.pl/product/18645115/m507b-rcd-test-instrument-metraline-rcd-check 2021-06-02 https://elecena.pl/product/18645115/m507b-rcd-test-instrument-metraline-rcd-check 2022-04-18 https://elecena.pl/product/18645115/m507b-rcd-test-instrument-metraline-rcd-check 2022-06-09 https://elecena.pl/product/18645115/m507b-rcd-test-instrument-metraline-rcd-check 2022-10-05 https://elecena.pl/product/18645115/m507b-rcd-test-instrument-metraline-rcd-check 2023-04-22 https://elecena.pl/product/18645115/m507b-rcd-test-instrument-metraline-rcd-check 2023-09-03 https://elecena.pl/product/18645115/m507b-rcd-test-instrument-metraline-rcd-check 2024-04-25 https://elecena.pl/product/18645115/m507b-rcd-test-instrument-metraline-rcd-check 2025-02-08 https://elecena.pl/product/18645115/m507b-rcd-test-instrument-metraline-rcd-check 2025-12-29 https://elecena.pl/product/18645115/m507b-rcd-test-instrument-metraline-rcd-check 2026-01-04 https://elecena.pl/product/18645115/m507b-rcd-test-instrument-metraline-rcd-check 2026-03-04 https://elecena.pl/product/18645115/m507b-rcd-test-instrument-metraline-rcd-check 2026-07-18