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IEC 62052-11
Edition 2.0 2020-06
INTERNATIONAL
STANDARD
Electricity metering equipment – General requirements, tests and test
conditions –
Part 11: Metering equipment
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IEC 62052-11
Edition 2.0 2020-06
INTERNATIONAL
STANDARD
Electricity metering equipment – General requirements, tests and test
conditions –
Part 11: Metering equipment
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.20 ISBN 978-2-8322-8437-7
– 2 – IEC 62052-11:2020 © IEC 2020
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 13
2 Normative references . 14
3 Terms and definitions . 17
3.1 General definitions . 17
3.2 Definitions related to the functional elements . 21
3.3 Definitions of meter ports . 24
3.4 Definitions of mechanical elements . 25
3.5 Definitions related to measurements . 27
3.6 Definitions related to external influences . 30
3.7 Definition of tests . 33
3.8 Definitions related to electromechanical meters . 33
3.9 Definitions related to meter marking and symbols . 34
4 Nominal electrical values . 35
4.1 Voltages . 35
4.1.1 Nominal voltages . 35
4.1.2 Voltage ranges . 36
4.2 Currents . 36
4.2.1 Nominal currents . 36
4.2.2 Starting current . 36
4.2.3 Minimum current . 36
4.2.4 Maximum current . 37
4.2.5 Current ranges . 37
4.3 Frequencies . 37
4.3.1 Nominal frequencies . 37
4.3.2 Frequency ranges . 37
4.4 Power consumption . 37
5 Construction requirements . 39
5.1 General . 39
5.2 Mechanical tests . 39
5.2.1 Shock test . 39
5.2.2 Vibration test . 40
5.3 Window . 40
5.4 Terminals – Terminal block(s) – Protective conductor terminal . 40
5.5 Sealing provisions . 40
5.5.1 General . 40
5.5.2 Meter case . 40
5.5.3 Meter terminals . 41
5.5.4 Sealing of detached indicating displays . 41
5.5.5 Sealing of LPIT connections . 41
5.5.6 Sealing of meter configuration . 42
5.6 Display of measured values . 42
5.6.1 General . 42
5.6.2 Meters without indicating displays. 42
5.6.3 Meters with indicating displays . 42
5.7 Storage of measured values . 43
5.8 Pulse outputs . 43
5.8.1 General . 43
5.8.2 Optical test output . 43
5.8.3 Electrical pulse output . 45
5.8.4 Operation indicator . 45
5.9 Electrical pulse inputs . 46
5.9.1 General characteristics . 46
5.9.2 Functional tests of electrical pulse inputs . 46
5.10 Auxiliary power supply . 46
6 Meter marking and documentation . 47
6.1 Meter accuracy class marking . 47
6.2 Meter marking . 47
6.3 Connection diagrams and terminal marking . 51
6.4 Symbols . 51
6.4.1 General . 51
6.4.2 Symbols for the measuring elements . 52
6.4.3 Symbols for transformer-operated meters . 52
6.4.4 Identification of the displayed information . 52
6.4.5 Marking of the measured quantity . 53
6.4.6 Symbols of principal units used for meters (see Table 8) . 53
6.4.7 Symbols for auxiliary devices . 54
6.4.8 Symbols for details of the suspension of the moving element . 54
6.4.9 Symbols for communication ports . 54
6.5 Documentation . 54
6.5.1 Installation manuals . 54
6.5.2 Instruction for use . 54
7 Metrological performance requirements and tests . 54
7.1 General test conditions . 54
7.2 Methods of accuracy verification . 56
7.3 Measurement uncertainty . 56
7.4 Meter constant . 57
7.5 Initial start-up of the meter . 57
7.6 Test of no-load condition . 58
7.7 Starting current test . 58
7.8 Repeatability test . 59
7.9 Limits of error due to variation of the current . 59
7.10 Limits of error due to influence quantities . 60
7.11 Time-keeping accuracy . 60
8 Climatic requirements . 60
8.1 General . 60
8.2 Environmental conditions . 60
8.3 Tests of the effects of the climatic environments . 60
8.3.1 General test requirements . 60
8.3.2 Acceptance criteria . 61
8.3.3 Dry heat test . 61
8.3.4 Cold test . 61
8.3.5 Damp heat cyclic test . 61
8.3.6 Protection against solar radiation . 62
– 4 – IEC 62052-11:2020 © IEC 2020
8.4 Durability .
...