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ELECTRICITY METERING EQUIPMENT (A.C.) - PART 1: GENERAL REQUIREMENTS, TESTS AND TEST CONDITIONS - METERING EQUIPMENT (CLASS INDEXES A, B AND C)
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Superseded date: 13-08-2019
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Published date: 12-01-2013
Publisher: Verband Deutscher Elektrotechniker
1 Scope2 Normative references3 Terms and definitions 3.1 General definitions 3.2 Definitions related to the functional elements 3.3 Definitions of mechanical elements 3.4 Definitions related to insulation 3.5 Definitions of meter quantities 3.6 Definitions of influence quantities 3.7 Definitions of tests 3.8 Definitions related to electromechanical meters 3.9 Abbreviations4 Standard electrical values 4.1 Standard reference voltages 4.2 Standard currents and current ranges 4.3 Standard reference frequency5 Mechanical requirements and tests 5.1 General mechanical requirements 5.2 Case 5.2.1 Requirements 5.2.2 Mechanical strength tests of meter case 5.3 Window 5.4 Terminals - Terminal block(s) - Protective earth terminal 5.5 Terminal cover(s) 5.6 Clearance and creepage distances 5.7 Insulating encased meter of protective class II 5.8 Resistance to heat and fire 5.9 Protection against penetration of dust and water 5.10 Display of measured values 5.11 Output device and operation indicator 5.11.1 General 5.11.2 Mechanical and electrical characteristics 5.11.3 Optical characteristics 5.12 Marking of meter 5.12.1 Name-plates 5.12.2 Connection diagrams and terminal marking 5.13 Accompanying information6 Climatic conditions 6.1 Temperature ranges 6.2 Relative humidity 6.3 Tests of the effect of the climatic environments 6.3.1 General 6.3.2 Dry heat test (Test B) 6.3.3 Cold test (Test A) 6.3.4 Damp heat cyclic test (Test Db) 6.3.5 Protection against solar radiation (Test Sa)7 Electrical requirements 7.1 Voltage range 7.2 Heating 7.3 Insulation 7.3.1 Requirements 7.3.2 General test conditions 7.3.3 Impulse voltage test 7.3.4 AC voltage test 7.4 Electromagnetic compatibility (EMC) 7.4.1 Electromagnetic environment 7.4.2 General requirements and test conditions 7.4.3 Critical change value 7.4.4 Immunity to voltage dips and short interruptions 7.4.5 Immunity to electrostatic discharges 7.4.6 Immunity to radiated RF electromagnetic fields 7.4.7 Immunity to electrical fast transients/bursts 7.4.8 Immunity to conducted disturbances, induced by RF fields 7.4.9 Immunity to surges 7.4.10 Immunity to damped oscillatory waves 7.4.11 Immunity to continuous magnetic fields of external origin 7.4.12 Immunity to power frequency magnetic fields of external origin 7.4.13 Radio interference suppression8 Type test 8.1 Test conditionsAnnex A (normative) Relationship between ambient air temperature and relative humidityAnnex B (normative) Optical test outputAnnex C (normative) Voltage waveform for the tests of the effect of voltage dips and short interruptionsAnnex D (informative) Test set-up for electromagnetic compatibility (EMC) testsAnnex E (normative) Electromagnet for testing the influence of continuous magnetic fields of external originAnnex F (informative) Test schedule - Recommended test sequencesAnnex ZZ (informative) Coverage of Essential Requirements of EC DirectivesIndex
Applies to newly manufactured watt-hour meters, measuring active electrical energy, intended for residential, commercial and light industrial use, for use on 50 Hz electrical networks.
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