Electronic, active phase comparator DEHNcap/PC-LRM with three separate LED displays in accordance with DIN VDE 0682-415 (EN/IEC 61243-5) for determining all-pole phase equilibrium in switchgear with LRM measuring sockets. Used on HR measuring sockets via two HR-LRM measuring adapters. For nominal voltages up to 45 kV / 50 Hz (three-phase system). With integrated self-test device and battery monitoring. Device records zero crossings of the two systems to be compared.