This European Standard applies to newly manufactured electromechanical watt-hour meters intended
for residential, commercial and light industrial use, of class indexes A and B, for the measurement of
alternating current electrical active energy in 50 Hz networks. It specifies particular requirements and
type test methods.
It applies to electromechanical watt-hour meters for indoor and outdoor application, consisting of a
measuring element and register(s) enclosed together in a meter case. It also applies to operation
indicator(s) and test output(s).
If the meter has (a) measuring element(s) for more than one type of energy (multi-energy meters), or
when other functional elements, like maximum demand indicators, electronic tariff registers, time
switches, ripple control receivers, data communication interfaces etc. are enclosed in the meter case
(multi-function meters) then this standard applies only for the active energy metering part.
This standard distinguishes between:
. meters of class indexes A and B;
. direct connected and transformer operated meters;
. meters for use in networks equipped with or without earth fault neutralizers.
It does not apply to:
. watt-hour meters where the voltage across the connection terminals exceeds 600 V (line-to-line
voltage for meters for polyphase systems);
. portable meters.
Methods for acceptance testing are covered by the IEC 62058 series of standards 1).
The dependability aspect is covered by the documents of the IEC 62059 series.