91.140.50 Electricity supply systems

Electricity metering equipment (a.c.) - Acceptance inspection -- Part 21: Particular requirements for electromechanical meters for active energy (classes 0,5, 1 and 2 and class indexes A and B) (IEC 62058-21:2008 , modified)

Electricity metering equipment (a.c.) - Acceptance inspection -- Part 31: Particular requirements for static meters for active energy (classes 0,2 S, 0,5 S, 1 and 2, and class indexes A, B and C)

Electricity metering equipment - Dependability - Part 31-1: Accelerated reliability testing - Elevated temperature and humidity (IEC 62059-31-1:2008)

Electricity metering equipment - Dependability - Part 32-1: Durability - Testing of the stability of metrological characteristics by applying elevated temperature (IEC 62059-32-1:2011)

Electricity metering equipment - Dependability - Part 41: Reliability prediction