IEC 62053-21:2020 pdf free download Electricity metering equipment – Particular requirements – Part 21: Static meters for AC active energy (classes 0,5, 1 and 2)
Scope
This part of lEC 62053 applies only to static watt-hour meters of accuracy classes 0,5, 1 and 2for the measurement of alternating current electrical active energy in 50 Hz or 60 Hz networksand it applies to their type tests only.
NOTE 1 For other generalrequirements, such as safety，dependability,etc.， see the relevant IEC 62052 orIEC 62059 standards.
This document applies to electricity metering equipment designed to:
.measure and control electrical energy on electrical networks (mains)with voltage up to 1 000 v;
NOTE 2 For AC electricity meters, the voltage mentioned above is the line-to-neutral votage derived from nominalvoltages. See lEC 62052-31:2015,Table 7.
. have all functional elements，including add-on modules,enclosed in, or forming a singlemeter case with exception of indicating displays;
. operate with integrated or detached indicating displays, or without an indicating display;. be installed in a specified matching socket or rack;
optionally，provide additional functions other than those for measurement of electricalenergy.
Meters designed for operation with low power instrument transformers (LPITs as defined in the
IEC 61869 series)may be tested for compliance with this document only if such meters andtheir LPITs are tested together and meet the requirements for directly connected meters.
NOTE 3 Modern electicity meters typically contain additional functions such as measurement of voltage magnitude,current magnitude,power，frequency，power factor，etc.; measurement of power quality parameters;load controlfunctions; delivery，time, test, accounting，recording functions; data communication interfaces and associated datasecurity functions. The relevant standards for these functions may apply in addition to the requirements of thisdocument. However,the requirements for such functions are outside the scope of this document.
NOTE 4 Product requirements for power metering and monitoring devices (PMDs) and measurement functions suchas voltage magnitude,current magnitude,power，frequency,etc.，are covered in IEC 61557-12. However，devicescompliant with IEC 61557-12 are not intended to be used as biling meters unless they are also compliant withlEC62052-11:2020 and one or more relevant IEC 62053-x accuracy class standards.
NOTE 5 Product requirements for power quality instruments (PQls) are covered in IEC 62586-1.Requirements forpower quality measurement techniques (functions) are covered in lEC 61000-4-30.Requirements for testing of thepower quality measurement functions are covered in lEC 62586-2.
This document does not apply to:
.meters for which the voltage line-to-neutral derived from nominal voltages exceeds 1 000 v
meters intended for connection with low power instrument transformers (LPlTs as definedin the lEC 61869 series) when tested without such transformers;
metering systems comprising multiple devices (except LPlTs) physically remote from oneanother;
portable meters;
meters used in rolling stock, vehicles, ships and airplanes;
laboratory and meter test equipment;
reference standard meters;
data interfaces to the register of the meter;
matching sockets or racks used for installation of electricity metering equipment;
any additional functions provided in electrical energy meters.
IEC 62053-21:2020 pdf free download
