Voltage transmitter for EN 50463 onboard energy-metering systems, with input range up to ±4800 V, 4800 V AC/DC insulation and an 18 kV AC test. Its electrical parameters correspond to 3000 V DC line voltage including switching overvoltages. EN 50155 certification confirms resistance to the mechanical and climatic conditions of rolling stock. The device works with the P51000 current transmitter to form a complete measurement chain compliant with EN 50463 metrological requirements.