Power meter arrangement

摘要

An electric power meter arrangement, includes a metrology unit (11) configured to be coupled to a power line (100) and to determine power consumption and provide measurement data representing the power consumption. A programmable control unit (20) including a memory (22) is configured to store software configured to run on the control unit. A security unit (14) is configured to store at least one key and to validate that software stored in the memory of the programmable control unit is authorized.