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BS EN IEC 61557-12:2022 – TC

BS EN IEC 61557-12:2022 – TC

$280.87

Tracked Changes. 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 – Power metering and monitoring devices (PMD)

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BSI 2022 254
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IEC 61557-12:2018 is available as IEC 61557-12:2018 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61557-12:2018 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 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 additional safety information, which aids the verification of the installation and enhances the performance of the distribution systems. The power metering and monitoring devices (PMD) for electrical parameters described in this document are used for general industrial and commercial applications. This document does not address functional safety and cyber security aspects. This document is not applicable for: – electricity metering equipment that complies with IEC 62053-21, IEC 62053-22, IEC 62053-23 and IEC 62053-24. Nevertheless, uncertainties defined in this document for active and reactive energy measurement are derived from those defined in IEC 62053 (all parts); – the measurement and monitoring of electrical parameters defined in IEC 61557-2 to IEC 61557-9 and IEC 61557-13 or in IEC 62020; – power quality instrument (PQI) according IEC 62586 (all parts); – devices covered by IEC 60051 (all parts) (direct acting analogue electrical measuring  instrument). IEC 61557-12:2018 cancels and replaces the first edition published in 2007. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) PMD-A has been withdrawn due the fact these devices are now mainly covered by the IEC 62586 series of standards. b) Three categories of PMD have been created with a list of minimum required functions for each category. c) Added a new Annex A explaining the different applications linked to the relevant standards and devices, and another new Annex C about the power factor conventions.  

PDF Catalog

PDF Pages PDF Title
1 30453479
145 A-30328087
146 undefined
152 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
153 Annex ZZ (informative)Relationship between this European standard and the safety objectives of Directive 2014/35/EU [2014 OJ L96] aimed to be covered
155 English
CONTENTS
160 FOREWORD
162 INTRODUCTION
163 1 Scope
164 2 Normative references
3 Terms, definitions and notations
3.1 General definitions
166 3.2 Definitions related to uncertainty and performance
170 3.3 Definitions related to electric phenomena
173 3.4 Definitions related to measurement techniques
174 3.5 Notations
3.5.1 Functions
3.5.2 Symbols and abbreviations
175 3.5.3 Indices
4 Requirements
4.1 General requirements
4.2 PMD general architecture
176 4.3 Classification of PMD
Figures
Figure 1 – PMD generic measurement chain
Tables
Table 1 – Functional classification of PMD with minimal required functions
177 4.4 Structure of PMD
4.4.1 Structure of PMD related to sensors
4.4.2 Requirements for self-powered PMD
Figure 2 – Description of different types of PMD
Table 2 – Structure of PMD
178 4.5 List of applicable performance classes
4.6 Operating and reference conditions for PMD
4.6.1 Reference conditions
Table 3 – List of applicable performance classes
179 4.6.2 Rated operating conditions
Table 4 – Reference conditions for testing
Table 5 – Rated operating temperatures for portable equipment
180 Table 6 – Rated operating temperatures for fixed installed equipment
Table 7 – Humidity and altitude operating conditions
181 4.7 Start-up conditions
4.8 Requirements for PMD functions
4.8.1 General requirements
Figure 3 – Relationship between ambient air temperature and relative humidity
182 4.8.2 Active power (P) and active energy (Ea) measurements
183 Table 8 – Intrinsic uncertainty table for active power and active energy measurement
184 Table 9 – Influence quantities for active power and active energy measurement (1 of 3)
187 Table 10 – Minimum test period
188 4.8.3 Reactive power (QA, QV) and reactive energy (ErA, ErV) measurements
Table 11 – Starting current for active power and active energy measurement
Table 12 – Intrinsic uncertainty table for reactive power and reactive energy measurement
189 Table 13 – Influence quantities for reactive power and reactive energy measurement
190 Table 14 – Minimum test period
191 4.8.4 Apparent power (SA, SV) and apparent energy (EapA, EapV) measurements
Table 15 – Starting current for reactive energy measurement
Table 16 – Intrinsic uncertainty table for apparent power and apparent energy measurement
192 Table 17 – Influence quantities for apparent power and apparent energy measurement
193 4.8.5 Frequency (f) measurements
Table 18 – Intrinsic uncertainty table for frequency measurement
194 4.8.6 RMS phase current (I) and neutral current (IN, INc) measurements
Table 19 – Influence quantities for frequency measurement
Table 20 – Rated range of operation for phase current measurement
195 Table 21 – Rated range of operation for neutral current (calculated or measured)
Table 22 – Intrinsic uncertainty table for phase current
Table 23 – Intrinsic uncertainty table for neutral current measurement
196 Table 24 – Intrinsic uncertainty table for neutral current calculation
197 Table 25 – Influence quantities for phase current and neutral current measurement
198 4.8.7 RMS voltage (U) measurements
Table 26 – Rated range of operation for RMS voltage measurement
Table 27 – Intrinsic uncertainty table for RMS voltage measurement
199 Table 28 – Influence quantities for RMS voltage measurement
200 4.8.8 Power factor (PFA, PFV) measurements
4.8.9 Short term flicker (Pst) and long term flicker (Plt) measurements
Table 29 – Intrinsic uncertainty table for power factor measurement
201 4.8.10 Voltage dip (Udip) and voltage swell (Uswl) measurements
Table 30 – Intrinsic uncertainty table for flicker measurement
203 Table 31 – Rated range of operation for voltage dips and swells measurement
204 Table 32 – Intrinsic uncertainty table for voltage dips and swells measurement
205 Table 33 – Influence quantities for dips and swells measurement
206 4.8.11 Voltage interruption (Uint) measurements
207 4.8.12 Transient overvoltage (Utr) measurements
4.8.13 Voltage unbalance (Unb, Unba) measurements
Table 34 – Intrinsic uncertainty table for voltage interruption measurement
Table 35 – Intrinsic uncertainty table for transient overvoltage measurement
208 4.8.14 Voltage harmonics (Uh) and voltage THD (THDu and THD-Ru) measurements
Table 36 – Intrinsic uncertainty table for voltage unbalance measurement
Table 37 – Rated range of operation for voltage harmonics measurement
Table 38 – Intrinsic uncertainty table for voltage harmonics measurement
209 4.8.15 Current unbalance (Inb, Inba) measurements
Table 39 – Intrinsic uncertainty table for voltage THDu or THD-Ru measurement
Table 40 – Intrinsic uncertainty table for current unbalance measurement
210 4.8.16 Current harmonics (Ih) and current THD (THDi and THD-Ri) measurements
Table 41 – Rated range of operation for current harmonics measurement
Table 42 – Intrinsic uncertainty table for current harmonics measurement
Table 43 – Intrinsic uncertainty table for current THDi and THD-Ri measurement
211 4.8.17 Minimum, maximum, peak, three-phases average and demand measurements
4.9 General mechanical requirements
4.9.1 Vibration requirements
4.9.2 IP requirements
Table 44 – Minimum IP requirements for PMD
212 4.10 Safety requirements
4.10.1 Protection against electrical hazards
213 4.10.2 Protection against mechanical hazards
4.10.3 Protection against other hazards
4.11 EMC requirements
4.11.1 Immunity
4.11.2 Emission
4.12 Inputs and/or outputs
4.12.1 General
4.12.2 Analog outputs
214 4.12.3 Pulse outputs
4.12.4 Control outputs
4.12.5 Analog inputs
4.12.6 Pulse and control inputs
5 Marking and operating instructions
5.1 General
5.2 Marking
215 5.3 Operating, installation and maintenance instructions
5.3.1 General
5.3.2 General characteristics
5.3.3 Essential characteristics
216 Table 45 – PMD specification form
217 6 Tests
6.1 General
Table 46 – Characteristics specification template
218 6.2 Type tests of PMD
6.2.1 General
6.2.2 Tests of intrinsic uncertainty
6.2.3 Tests of variation of uncertainty with influence quantities
6.2.4 Test of temperature influence
219 6.2.5 Active power
Figure 4 – Waveform for odd harmonics influence test on active power measurement
220 Figure 5 – Spectral content for odd harmonics influence teston active power measurement
221 6.2.6 Apparent power
Figure 6 – Waveform for sub-harmonics influence test onactive power measurement
Figure 7 – Spectral content for sub-harmonics influence teston active power measurement
222 6.2.7 Power factor
6.2.8 Common mode voltage rejection test
6.2.9 Frequency
Figure 8 – Common mode voltage influence testing
223 6.2.10 Measurement of voltage harmonics and THDu
6.2.11 Measurement of current harmonics and THDi
Figure 9 – Waveform for harmonics influence teston frequency measurement
224 6.2.12 Dips and swells
6.2.13 Voltage interruptions
6.2.14 Outputs tests
225 6.2.15 Climatic tests
226 6.2.16 EMC tests
6.2.17 Start-up tests
6.2.18 Gapless measurement test
6.2.19 Safety tests
6.3 Routine tests
6.3.1 Protective bonding test
227 6.3.2 Dielectric strength test
6.3.3 Uncertainty test
228 Annexes
Annex A (informative) Metering, measuring and monitoring applications
A.1 Applications on demand side and supply side
A.2 Link between applications, devices and standards
Figure A.1 – Simplified overview of measurement applications onsupply side and demand side
229 Table A.1 – Main measurement applications
230 Annex B (informative) Definitions of electrical parameters
B.1 General
B.2 Definitions in the presence of a neutral
Table B.1 – Definition of symbols
231 Table B.2 – Calculation definitions for electrical parameters
234 B.3 Power measurement in three-phase three-wire systems using the two-wattmeter method
B.3.1 General
Figure B.1 – Arithmetic and vector apparent powers in sinusoidal situation
235 B.3.2 Total active power
B.3.3 Total vector reactive power using quadrature phase shift definition
Figure B.2 – Three-phase circuit without neutral
236 B.3.4 Total vector reactive power using Budeanu’s definition
B.4 Additional relationships in case of sinusoidal voltage
237 Annex C (informative) Convention about the sign of the power factor
C.1 General
C.2 Convention for power factor (consumer perspective)
Figure C.1 – Formatting of power factor with a consumer perspective
238 C.3 Convention for power factor (producer reference frame)
Figure C.2 – Convention for power factor with a producer perspective
Table C.1 – Conventions for the sign of Power factorwith a Consumer perspective
239 Table C.2 – Conventions for the sign of power factor with a producer perspective
240 Annex D (normative) Definitions of minimum, maximum, peak and demand values
D.1 Demand quantities
D.1.1 General
D.1.2 Power demand
D.1.3 Current demand
D.1.4 Thermal current demand (or bi-metal current demand)
D.1.5 Specified intervals for demand calculation
Figure D.1 – Thermal current demand
241 D.2 Peak demand quantities
D.3 Three-phase average quantities
D.4 Maximum and minimum quantities
Figure D.2 – Fixed block interval
Figure D.3 – Sliding block interval
242 Annex E (informative) Intrinsic uncertainty and operating uncertainty
E.1 General
E.2 Operating uncertainty calculation
Figure E.1 – Different kinds of uncertainties
243 Figure E.2 – Flowchart for the determination of the operating uncertainty
244 Annex F (informative) Recommended sensor classes for the different kinds of PMD
F.1 General considerations
F.2 Specific case of an active power and energy measurement, achieved by a PMD associated with an external current sensor or/and a voltage sensor
F.3 List of functions affected by uncertainty of external sensors
Table F.1 – PMD SD associated with current sensor or PMD DS associated with voltage sensor or PMD SS associated with voltage and current sensors
245 Table F.2 – List of functions affected by uncertainty of external sensors
246 Annex G (informative)Notion of measurement uncertainty
G.1 General considerations
G.2 Computing the expanded uncertainty
G.2.1 General
G.2.2 Estimated standard deviation
247 G.2.3 Expanded uncertainty
Table G.1 – Correction factor C(N) for sample size N
248 G.3 Determining the measurement uncertainty
G.3.1 Systematic error
G.3.2 Measurement uncertainty
Figure G.1 – Illustration of the notion of measurement uncertainty
249 G.4 Using the measurement uncertainty as a pass/fail criterion
G.4.1 Intrinsic uncertainty tests
G.4.2 Tests with influence quantities
G.4.3 Overall pass/fail criterion
250 Figure G.2 – Overview of the uncertainty test procedure
251 Bibliography

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BS EN IEC 61557-12:2022 - TC
$280.87