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.: LED display shows direct and alternating current levels 12, 24, 50, 120, 230, 400 and 750 V
.: polarity test with direct voltage
.: identifying the phase conductor against the protective conductor (PE) in alternating voltage
.: load application to suppress inductive and capacitive voltage at Is < 200 mA
.: VDE tested according to DIN EN/IEC 61243-3[...]