IEC 61557-12-2021 pdf free download – Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC – Equipment for testing, measuring or monitoring of protective measures – Part 12: Power metering and monitoring devices (PMD)

02-14-2022 comment

IEC 61557-12-2021 pdf free download – Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC – Equipment for testing, measuring or monitoring of protective measures – Part 12: Power metering and monitoring devices (PMD).
This part of IEC 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 or
up to 1 500 v 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 Hi.
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 IEC 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 applicablefor to:
electricity meteringequipment thatcomplies with IEC 62053-21,IEC 62053-22,IEC 62053-23 and IEc 62053-24.Nevertheless, uncertainties defined in this document for
active and reactive energymeasurement are derived from those defined in lEC 62053 (allparts);
the measurement and monitoring of electrical parameters defined in IEC 61557-2 toIEC61557-9 and lEC61557-13 or in lEC 62020;
power quality instrument (PQl) according lEC 62586 (all parts);
devices covered by IEC 60051 (all parts)(direct acting analogue electrical measuringinstrument).
NOTE 1 Generally such types of devices are used in the following applications or for the following general needs:
energy management inside the installation,such as faclitating the implementation of documents such aslso 50001 and lEC 60364-8-1;
monitoringandior measurement of electrical parameters;
measurement and/or monitoring of the quality of energy inside commercialVindustrial installations.
NOTE 2 A measuring and monitoring device of electrical parameters usually consists of severalfunctionalmodules. All or some of the functiona modules are combined in one device. Examples of functional modules are:measurement and monitoring of several electrical parameters simultaneously;
energy measurement andlor monitoring, as well as sometimes compliance with aspects of building regulations;alarms functions;
demand side quality (current and voltage harmonics,overlunder voltages,voltage dips and swells,etc.).
NOTE 3 PMD are historically called power meter,power monitor,power monitor device,power energy monitoringdevice,power analyser,multifunction meter,measuring multifunction equipment,energy meters.
NOTE4 Metering,measuring and monitoring applications are explained in Annex A
2Normative 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 (including
any 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, Environmentaltesting – 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: Testingandmeasurement techniques – Power quality measurement methods.IEC 61557-12 pdf download.

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