• October 27, 2023

    Posted on

    The Stability of IEC Standards

    IEC Standard symbol picture

    Meter manufacturers, utility laboratories and type testing institutes have planning security until year 2025.

  • February 26, 2024

    Posted on

    The Critical Change Value

    Aristo Trilog slide rule

    The critical change value indicates the maximum amount of change allowed in the meter's energy registers during disturbance tests without any current flowing in the meter's current circuits.