{"id":434054,"date":"2024-10-20T07:42:03","date_gmt":"2024-10-20T07:42:03","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iec-62057-12023\/"},"modified":"2024-10-26T14:37:08","modified_gmt":"2024-10-26T14:37:08","slug":"bs-en-iec-62057-12023","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iec-62057-12023\/","title":{"rendered":"BS EN IEC 62057-1:2023"},"content":{"rendered":"

IEC 62057-1:2023 applies to stationary meter test units (MTUs) permanently installed in laboratories, used for testing and calibration of electricity meters, in particular for their type test, acceptance test and verification test. It covers the requirements for automatic MTUs for indoor laboratory application and applies to newly manufactured MTUs to test electricity meters on 50 Hz or 60 Hz networks with an AC voltage up to 600 V (phase to neutral). If meters are intended for system voltages not specified in this document, special requirements are agreed between the manufacturer and the purchaser. This document also defines the kind of tests to perform as type tests \/ routine tests \/ acceptance tests and commissioning tests for MTUs. It does not apply to: \u2022 portable reference meters and portable sources; \u2022 electricity meters; \u2022 data interfaces to the meter and test procedures of data interface; \u2022 transformer operated MTUs; \u2022 personal computers supplied together with the MTU.<\/p>\n

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2<\/td>\nundefined <\/td>\n<\/tr>\n
5<\/td>\nAnnex ZA (normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n
7<\/td>\nEnglish
CONTENTS <\/td>\n<\/tr>\n
12<\/td>\nFOREWORD <\/td>\n<\/tr>\n
14<\/td>\n1 Scope
2 Normative references <\/td>\n<\/tr>\n
15<\/td>\n3 Terms and definitions <\/td>\n<\/tr>\n
16<\/td>\n3.1 Definitions related to the elements of the MTU <\/td>\n<\/tr>\n
17<\/td>\n3.2 Definitions of active, reactive and apparent power <\/td>\n<\/tr>\n
20<\/td>\n3.3 Definitions related to influence quantities <\/td>\n<\/tr>\n
21<\/td>\n3.4 Definitions related to accuracy <\/td>\n<\/tr>\n
22<\/td>\n3.5 Definitions related to testing <\/td>\n<\/tr>\n
23<\/td>\n4 Meter test units and automated meter test units <\/td>\n<\/tr>\n
24<\/td>\n5 Meter accuracy test methods
5.1 General
5.2 Energy comparison method <\/td>\n<\/tr>\n
25<\/td>\n5.3 Power\u2013time measurement method (wattmeter method with register reading)
5.4 Pulse comparison method <\/td>\n<\/tr>\n
26<\/td>\n6 Standard electrical values
6.1 Mains supply <\/td>\n<\/tr>\n
27<\/td>\n6.2 Output values and ranges of the test circuits
6.2.1 Test voltage circuit
6.2.2 Test current circuit
Tables
Table 1 \u2013 Mains power supply condition
Table 2 \u2013 Test voltage circuit for each phase <\/td>\n<\/tr>\n
28<\/td>\n6.2.3 Phase angle
6.2.4 Frequency
Table 3 \u2013 Test current circuit for each phase
Table 4 \u2013 Setting of phase angle between each phase voltage and current circuit
Table 5 \u2013 Setting of frequency <\/td>\n<\/tr>\n
29<\/td>\n6.2.5 Harmonics
6.3 Standard meter
6.3.1 Accuracy class
6.3.2 Standard electrical values
Table 6 \u2013 Setting of harmonics <\/td>\n<\/tr>\n
30<\/td>\n6.4 Magnetic field of the MTU
6.5 Electrical and mechanical values for the scanning head(s)
Table 7 \u2013 Standard electrical values for the standard meter
Table 8 \u2013 Electrical and mechanical values for the scanning head(s) <\/td>\n<\/tr>\n
31<\/td>\n6.6 Error calculation system
6.6.1 Functional requirements
6.6.2 Parameters
7 Constructional requirements of the MTU
7.1 General requirements
7.2 Source and standard meter
Table 9 \u2013 Parameters for the error calculation system <\/td>\n<\/tr>\n
32<\/td>\n7.3 Meter mounting system
7.3.1 General
7.3.2 Terminals <\/td>\n<\/tr>\n
33<\/td>\n8 Information and marking requirements
8.1 General
Table 10 \u2013 Information requirements <\/td>\n<\/tr>\n
34<\/td>\n8.2 Labels, signs and signals <\/td>\n<\/tr>\n
35<\/td>\n8.3 Information for selection
8.3.1 General
8.3.2 General information
8.3.3 Information related to standard meters <\/td>\n<\/tr>\n
36<\/td>\n8.3.4 Information related to sources, error calculation systems and frequency generators
8.3.5 Information related to the ICTs and MSVTs
8.3.6 For the communication interfaces and error calculation systems <\/td>\n<\/tr>\n
37<\/td>\n8.4 Information for installation and commissioning
8.4.1 General
8.4.2 Dimensions and mass
8.4.3 Connection
8.4.4 Protection \u2013 Protective class and earthing <\/td>\n<\/tr>\n
38<\/td>\n8.4.5 Self-consumption
8.5 Information for use
8.5.1 General
8.5.2 Display, push buttons and other controls
8.5.3 Connection to user\u2019s equipment
8.5.4 External protection devices
8.5.5 Cleaning
8.6 Information for maintenance <\/td>\n<\/tr>\n
39<\/td>\n9 Climatic conditions for the MTU
9.1 Normal environmental conditions
9.2 Extreme environmental conditions
9.3 Temperature limits and resistance to heat
Table 11 \u2013 Climatic conditions
Table 12 \u2013 Surface temperature limits <\/td>\n<\/tr>\n
40<\/td>\n10 Electrical requirements of the MTU
10.1 Influence of mains supply
10.2 Insulation
10.2.1 General
10.2.2 Clearances and creepage distances
10.2.3 Verification of clearances and creepage distances
10.2.4 AC voltage test <\/td>\n<\/tr>\n
41<\/td>\n11 Electromagnetic compatibility
11.1 General requirements and performance criteria
Table 13 \u2013 AC voltage tests <\/td>\n<\/tr>\n
42<\/td>\n11.2 General test conditions
11.2.1 General
11.2.2 Test of immunity to electrostatic discharges
11.2.3 Test of immunity of electromagnetic RF Fields
Table 14 \u2013 Limits of variation of error of standard meters during immunity test <\/td>\n<\/tr>\n
43<\/td>\n11.2.4 Immunity to power frequency magnetic fields of external origin
11.2.5 Test of immunity to fast transient bursts
11.2.6 Test of immunity to surges
11.2.7 Test of immunity to conducted disturbances, induced by RF (radio frequency) fields <\/td>\n<\/tr>\n
44<\/td>\n11.2.8 Radio interference suppression
12 Standard meter
12.1 General
12.2 Accuracy requirements under reference conditions <\/td>\n<\/tr>\n
45<\/td>\n12.3 Limits of error due to influence quantities
Table 15 \u2013 Relative error limits for the standard meter <\/td>\n<\/tr>\n
46<\/td>\nTable 16 \u2013 Influence quantities <\/td>\n<\/tr>\n
47<\/td>\n12.4 Accuracy tests in the presence of harmonics
12.4.1 Test with 5th harmonic in the current and voltage
12.4.2 Tests of the influence of odd and sub-harmonics
13 Software requirements
13.1 Application
13.2 Identification
13.3 Protection <\/td>\n<\/tr>\n
48<\/td>\n13.4 Functional requirements
13.5 Control and supervision of the MTU by the software <\/td>\n<\/tr>\n
49<\/td>\n13.6 Creation, protection and storage of test programs
13.7 Protection and storage of test results and test protocols
13.8 Documentation of the software
13.9 Software logs <\/td>\n<\/tr>\n
50<\/td>\n14 Accuracy requirements and tests
14.1 General
14.2 Test methods for determination of the MTU accuracy <\/td>\n<\/tr>\n
51<\/td>\n14.3 Test points \u2013 Selection of voltage and current ranges
Table 17 \u2013 Recommended accuracy class of reference standard meter
Table 18 \u2013 Basic measurement table (recommended test points) <\/td>\n<\/tr>\n
52<\/td>\n14.4 Accuracy requirements
14.4.1 Limits of maximum permissible error
14.4.2 Correction of the error \u03b4W of the MTU
Table 19 \u2013 Limits of maximum permissible error (\u03b4Wmax)of the complete MTU related to DUT <\/td>\n<\/tr>\n
53<\/td>\n14.4.3 Mean value and repeatability of the measurements
Table 20 \u2013 Limits of permissible values of standard deviation of MTU <\/td>\n<\/tr>\n
54<\/td>\n14.5 Check of measurement results of the MTU
14.5.1 Basic measurements of the MTU
14.5.2 Maintenance measurement of the MTU
14.6 Tests and testing procedures
14.6.1 Type tests
14.6.2 Routine tests <\/td>\n<\/tr>\n
56<\/td>\n14.6.3 Acceptance test
14.6.4 Commissioning test <\/td>\n<\/tr>\n
57<\/td>\nAnnexes
Annex A (informative)Symbols according to IEC 60417
Table A.1 \u2013 Symbols which may be used on metering equipment <\/td>\n<\/tr>\n
58<\/td>\nAnnex B (normative)Reference conditions
Table B.1 \u2013 Reference conditions <\/td>\n<\/tr>\n
59<\/td>\nAnnex C (informative)Test circuits and test signals for testing in the presence of harmonics
C.1 General
C.2 Phase fired control (odd harmonics)
Figures
Figure C.1 \u2013 Test circuit diagram (informative) <\/td>\n<\/tr>\n
60<\/td>\nFigure C.2 \u2013 Phase fired waveform
Figure C.3 \u2013 Informative distribution of harmonic content of phase fired waveform(the Fourier analysis is not complete) <\/td>\n<\/tr>\n
61<\/td>\nC.3 Burst control (sub-harmonics)
Figure C.4 \u2013 Burst fired waveform <\/td>\n<\/tr>\n
62<\/td>\nFigure C.5 \u2013 Informative distribution of harmonics (the Fourier analysis is not complete) <\/td>\n<\/tr>\n
63<\/td>\nAnnex D (informative)Calculation of errors and the associatedexpanded measurement uncertainty
D.1 General
D.2 Degrees of freedom and sensitivity coefficient <\/td>\n<\/tr>\n
64<\/td>\nD.3 Method for the determination of the standard measurement uncertainty
D.3.1 Type A
Table D.1 \u2013 Coverage factors k for different effective degrees of freedom Veff <\/td>\n<\/tr>\n
65<\/td>\nD.3.2 Type B <\/td>\n<\/tr>\n
66<\/td>\nD.4 Examples for the calculation of the measurement uncertainty
D.4.1 Measuring principle
D.4.2 Model equation
Figure D.1 \u2013 Measuring setup of the meter test arrangement <\/td>\n<\/tr>\n
67<\/td>\nD.4.3 Measurement uncertainty budget considering the specification for the working standard <\/td>\n<\/tr>\n
68<\/td>\nTable D.2 \u2013 List 1 of quantities
Table D.3 \u2013 Readings 1 of the DUT <\/td>\n<\/tr>\n
69<\/td>\nTable D.4 \u2013 Reading 1 of the standard meter
Table D.5 \u2013 Measurement uncertainty budget 1 <\/td>\n<\/tr>\n
70<\/td>\nD.4.4 Measurement uncertainty budget considering the error of the working standard
Table D.6 \u2013 List 2 of quantities
Table D.7 \u2013 Readings 2 of the DUT <\/td>\n<\/tr>\n
71<\/td>\nTable D.8 \u2013 Reading 2 of the standard meter <\/td>\n<\/tr>\n
72<\/td>\nD.5 Indication of the measurement uncertainty
Table D.9 \u2013 Measurement uncertainty budget 2 <\/td>\n<\/tr>\n
73<\/td>\nAnnex E (informative)Guidelines for overall laboratory setup
E.1 General
E.2 General conditions
E.3 Quality of mains supply <\/td>\n<\/tr>\n
74<\/td>\nE.4 Reference standard
Table E.1 \u2013 Mains supply quality <\/td>\n<\/tr>\n
75<\/td>\nAnnex F (normative)Multi-secondary voltage transformer
F.1 General
F.2 Definitions
F.3 Application <\/td>\n<\/tr>\n
76<\/td>\nF.4 Technical requirements
Figure F.1 \u2013 Testing of single-phase meters with closed linkbetween the voltage and current circuits (variant 1)
Figure F.2 \u2013 Testing of single-phase meters with closed linkbetween the voltage and current circuits (variant 2) <\/td>\n<\/tr>\n
77<\/td>\nF.5 Total accuracy of MTU with MSVT
Table F.1 \u2013 Technical requirements of MSVTs
Table F.2 \u2013 Maximum permissible limits of error of MTU with MSVT <\/td>\n<\/tr>\n
78<\/td>\nAnnex G (normative)Isolating current transformer (ICT)
G.1 General
G.2 Definitions
G.3 Application
Figure G.1 \u2013 Testing of three-phase meters with closed linkbetween the voltage and current circuits <\/td>\n<\/tr>\n
79<\/td>\nG.4 Technical requirements
G.5 Wiring and terminals
G.6 Total accuracy of MTU with ICT
Table G.1 \u2013 Technical requirements of ICT <\/td>\n<\/tr>\n
80<\/td>\nTable G.2 \u2013 Maximum permissible limits of error of MTU with ICTs <\/td>\n<\/tr>\n
81<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Electrical energy meters. Test equipment, techniques and procedures – Stationary meter test units (MTUs)<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2023<\/td>\n82<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":434065,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[284,2641],"product_tag":[],"class_list":{"0":"post-434054","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-17-220-01","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/434054","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/434065"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=434054"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=434054"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=434054"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}