IEC 61557-12:2021 pdf free download – Electrical safety in low voltage distribution systems up to 1 000 v AC and1 500 v Dc- Equipment for testing, measuring or monitoring of protectivemeasures
1Scope
This part of lEC 61557 specifies requirements for power metering and monitoring devices(PMD) that measure and monitor the electrical quantities within electrical distribution systems,and optionally other external signals. These requirements also define the performance ofPMD in single- and three-phase AC or DC systems having rated voltages up to 1 000 v AC orup to 1 500v Dc.
These devices are fixed or portable.They are intended to be used indoors and/or outdoors.
Power metering and monitoring devices (PMD), as defined in this document, give additionalsafety information，which aids the verification of the installation and enhances theperformance of the distribution systems.
Additionally， this document specifies requirements for measurement functions dedicated tometering and monitoring of electrical parameters called power metering and monitoringfunction(PMF) which can be embedded in equipment (EPMF) that is not classified as PMDand for which the main function is not power metering and monitoring.
Requirements for power metering and monitoring function(PMF) and additional requirementsfor equipment embedding power metering and monitoring function(EPMF) are described inAnnex H.
The power metering and monitoring devices(PMD) for electrical parameters described in thisdocument are used for general industrial and commercial applications.
The power metering and monitoring devices(PMD) can be associated with sensing devicessuch as but not limited to instruments transformers compliant to lEC 61869 series ofstandards or with transducers compliant to lEC 60688.
This document does not address functional safety and cyber security aspects.This document is not applicable for to:
– electricity metering equipmentthat complies with IEC 62053-21，IEC 62053-22,IEC 62053-23 and lEC 62053-24.Nevertheless, uncertainties defined in this document foractive and reactive energy measurement are derived from those defined in lEC 62053 (allparts);
– the measurement and monitoring of electrical parameters defined in IEC 61557-2 toIEC 61557-9 and lEC61557-13 or in lEC 62020;
– power quality instrument (PQl) according lEC 62586(all parts);
– devices covered by lEC 60051 (all parts)(direct acting analogue electrical measuringinstrument).
NOTE1 Generally such types of devices are used in the following applications or for the following general needs:
2 Normative references
The following documents are referred to in the text in such a way that some or all of theircontent constitutes requirements of this document.For dated references,only the editioncited applies. For undated references, the latest edition of the referenced document (includingany amendments) applies.
IEC 60068-2-1，Environmental testing – Part 2-1 : Tests – Test A: Cold
IEC 60068-2-2，Environmental testing – Part 2 : Tests – Tests B: Dry heat
IEC 60068-2-30，Environmental testing – Part 2-30 – Tests – Test Db: Damp heat,cyclic(12 h + 12 h cycle)
IEC 60529,Degrees of protection provided by enclosures (IP Code)
IEC 61000-4-30:2015,Electromagnetic compatibility(EMC) – Part 4-30: Testing andmeasurement techniques – Power quality measurement methods
IEC 61010-1:2010，Safety requirements for electrical equipment for measurement,control,and laboratory use – Part 1: General requirements
IEC 61010-1:2010/AMD 1:2016
IEC 61010-2-030:2017,Safety requirements for electrical equipment for measurement, control,and laboratory use – Part 2-030: Particular requirements for testing and measuring circuits
IEC 61326-1:2012，Electrical equipment for measurement,control and laboratory use -EMCrequirements – Part 1: General requirements
IEC 62053-31:1998，Electricity metering equipment (a.c.) – Particular requirements – Part 31:Pulse output devices for electromechanical and electronic meters (two wires only)