BS EN 62053-21:2003+A1:2017 applies only to newly manufactured static watt-hour meters of accuracy classes 1 and 2, for the measurement of alternating current electrical active energy in 50 Hz or 60 Hz and it applies to their type tests only.

It applies only to static 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 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, then the relevant standards for these elements also apply.

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;
• data interfaces to register of the meter;
• reference meters.

The safety aspect is covered by IEC 62052-31:2015.

Regarding acceptance tests, see IEC 62058-11:2008 and IEC 62058-31:2008.

The dependability aspect is covered by the standards of the IEC 62059 series.


Cross References:
IEC 60736:1982
IEC 61358:1996
IEC 62052-11:2003
IEC 62052-11:2003/A1:2016
EN 62052-11:2003
EN 62052-11:2003+A1:2017
IEC 62052-31:2015
EN 62052-31:2016
IEC 62053-61:1998
IEC 62058-11:2008
EN 62058-11:2010
IEC 62058-31:2008
EN 62058-31:2010


Incorporates the following:
AMD 15026 published 24 February 2004
AMD 15026 is a Corrigendum. Amendment, March 2017. Amends and replaces BS EN 62053-21:2003