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ELECTRICITY METERING EQUIPMENT (A.C.) - PART 2: PARTICULAR REQUIREMENTS - ELECTROMECHANICAL METERS FOR ACTIVE ENERGY (CLASS INDEXES A AND B)
Amended by: BS EN 50470-2:2006+A1:2018
Available format(s): Hardcopy, PDF
Language(s): English
Published date: 01-01-2006
Publisher: British Standards Institution
1 Scope2 Normative references3 Terms, definitions and abbreviations4 Standard electrical values5 Mechanical requirements 5.1 General 5.2 Register (counting mechanism) 5.3 Direction of rotation and marking of the rotor6 Climatic conditions7 Electrical requirements 7.1 Power consumption 7.1.1 Measuring method 7.1.2 Voltage circuits 7.1.3 Current circuits 7.2 AC voltage test8 Accuracy requirements and tests 8.1 Limits of percentage error due to variation of the load 8.2 Repeatability 8.3 Limits of additional percentage error due to influence quantities 8.4 Maximum permissible error (MPE) 8.5 Effect of disturbances of long duration 8.6 Short time overcurrents 8.7 Performing the tests 8.7.1 Accuracy test conditions 8.7.2 Accuracy test at reference conditions 8.7.3 Interpretation of accuracy test results 8.7.4 Repeatability 8.7.5 Test of effects of influence quantities 8.7.6 Calculation of the composite error 8.7.7 Test of effects of disturbances of long duration 8.7.8 Short time overcurrents 8.7.9 Test of starting and no-load condition 8.7.10 Meter constant 8.7.11 Adjustment9 Durability10 Reliability11 Protection against corruptionAnnex A (informative) Calculation of the composite errorAnnex B (normative) Test circuit diagram for the test of immunity to earth faultAnnex ZZ (informative) Coverage of Essential Requirements of EC DirectivesBibliography
Applies to newly manufactured electromechanical watt-hour meters intended for residential, commercial and light industrial use, of class indexes A and B, for the measurement of alternating current electrical active energy in 50 Hz networks.
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