Capacitive PHE III voltage detector as a separate device in accordance with EN/IEC 61243-1 (DIN VDE 0682-411) for verifying safe isolation from supply voltage on all poles at the work location in accordance with EN 50110-1 (DIN VDE 0105-100) in electrical installations. With universal gear coupling in accordance with EN/IEC 60832 (DIN VDE 0682-211). Category "L" for overhead lines. Suitable for use in wet weather conditions. With visual and acoustic indication and self-testing element.