Capacitive voltage tester PHE III as a combined design according to DIN0682-411 (EN/IEC 61243-1) for all-pole determination of the absence of voltage at the work site according to DIN0105-100 (EN 50110-1) on overhead lines of electric railways at 25 kV / 50 Hz. Category 'S' for single-phase systems earthed on one side. Can also be used in the event of precipitation. With optical and acoustic display and self-test device.