AS 1284.5-2000

1 - AS 1284.5-2000 ELECTRICITY METERING - GENERAL PURPOSE ELECTRONIC WATTHOUR METERS
4 - PREFACE
5 - CONTENTS
7 - INTRODUCTION
9 - 1 Scope and application
9 - 2 Normative references
12 - 3 Definitions
12 - 3.1 General definitions
12 - 3.1.1 watt-hour meter:
12 - 3.1.2 static watt-hour meter:
12 - 3.1.3 multi-rate meter:
13 - 3.1.4 meter type:
13 - 3.2 Definitions related to the functional elements
13 - 3.2.1 measuring element:
13 - 3.2.2 output devices
13 - 3.2.3 memory:
13 - 3.2.4 display:
13 - 3.2.5 register:
13 - 3.2.6 current circuit:
13 - 3.2.7 voltage circuit:
13 - 3.2.8 auxiliary circuit:
13 - 3.2.9 constant:
14 - 3.3 Definitions of mechanical elements
14 - 3.3.1 indoor meter:
14 - 3.3.2 outdoor meter:
14 - 3.3.3 base:
14 - 3.3.4 cover:
14 - 3.3.5 case:
14 - 3.3.6 accessible conductive part:
14 - 3.3.7 protective earth terminal:
14 - 3.3.8 terminal block:
14 - 3.3.9 terminal cover:
14 - 3.3.10 clearance:
14 - 3.3.11 creepage distance:
14 - 3.3.12 Australian outdoor meter:
14 - 3.4 Definitions of insulations
14 - 3.4.1 basic insulation:
14 - 3.4.2 supplementary insulation:
15 - 3.4.3 double insulation:
15 - 3.4.4 reinforced insulation:
15 - 3.4.5 insulating encased meter of protective class I:
15 - 3.4.6 insulating encased meter of protective class II:
15 - 3.5 Definitions of meter quantities
15 - 3.5.1 reference current
15 - 3.5.2 maximum current* (I max ):
15 - 3.5.3 reference voltage* (U n ):
15 - 3.5.4 reference frequency:
15 - 3.5.5 class index:
15 - 3.5.6 percentage error
16 - 3.6 Definitions of influence quantities
16 - 3.6.1 influence quantity:
16 - 3.6.2 reference conditions:
16 - 3.6.3 variation of error due to an influence quantity:
16 - 3.6.4 distortion factor:
16 - 3.6.5 electromagnetic disturbance:
16 - 3.6.6 reference temperature:
16 - 3.6.7 rated operating conditions:
16 - 3.6.8 specified measuring range:
16 - 3.6.9 specified operating range:
16 - 3.6.10 limit range of operation:
16 - 3.6.11 storage and transport conditions:
16 - 3.6.12 normal working position:
16 - 3.6.13 thermal stability:
17 - 3.7 Definition of tests
17 - 3.7.1 type test:
17 - 4 Requirements
17 - 4.1 Standard electrical values
17 - 4.1.1 Standard reference voltages
17 - 4.1.2 Standard currents
18 - 4.1.3 Standard reference frequencies
18 - 4.2 Mechanical requirements
18 - 4.2.1 General mechanical requirements
18 - 4.2.2 Case
18 - 4.2.3 Window
18 - 4.2.4 Terminals - Terminal block(s) - Protective earth terminal
22 - 4.2.5 Terminal cover(s)
22 - 4.2.6 Clearance and creepage distances
23 - 4.2.7 Insulating encased meter of protective class II
23 - 4.2.8 Resistance to heat and fire
23 - 4.2.9 Protection against penetration of dust and water
24 - 4.2.10 Protection against solar radiation
24 - 4.2.11 Display of measured values
24 - 4.2.12 Output device
24 - 4.2.13 Marking of meter
26 - 4.3 Climatic conditions
26 - 4.3.1 Temperature range
26 - 4.3.2 Relative humidity
26 - 4.4 Electrical requirements
26 - 4.4.1 Power consumption
27 - 4.4.2 Influence of supply voltage
28 - 4.4.3 Influence of short-time overcurrents
28 - 4.4.4 Influence of self-heating
29 - 4.4.5 Influence of heating
29 - 4.4.6 Insulation
30 - 4.4.7 Immunity to earth fault
30 - 4.5 Electromagnetic compatibility (EMC)
30 - 4.5.1 Immunity to electromagnetic disturbance
30 - 4.5.2 Radio interference suppression
30 - 4.6 Accuracy requirements
30 - 4.6.1 Limits of error due to variation of the current
31 - 4.6.2 Limits of error due to other influence quantities
32 - 4.6.3 Limits of error due to ambient temperature variation
33 - 4.6.4 Starting and running with no load
33 - 4.6.5 Meter constant
34 - 5 Tests and test conditions
34 - 5.1 General testing procedures
34 - 5.1.1 Test conditions
34 - 5.1.2 Type test
34 - 5.2 Tests of mechanical requirements
34 - 5.2.1 Spring hammer test
34 - 5.2.2 Shock test
34 - 5.2.3 Vibration test
35 - 5.2.4 Test of resistance to heat and fire
35 - 5.2.5 Tests of protection against penetration of dust and water
35 - 5.3 Tests of climatic influences
35 - 5.3.1 Dry heat test
36 - 5.3.2 Cold test
36 - 5.3.3 Damp heat cyclic test
36 - 5.3.4 Solar radiation test
36 - 5.4 Tests of electrical requirements
36 - 5.4.1 Test of power consumption
37 - 5.4.2 Tests of influence of supply voltage
37 - 5.4.3 Test of influence of short-time overcurrents
37 - 5.4.4 Test of influence of self-heating
38 - 5.4.5 Test of influence of heating
38 - 5.4.6 Tests of insulation properties
40 - 5.4.7 Test of immunity to earth fault
40 - 5.5 Tests for electromagnetic compatibility (EMC)
40 - 5.5.1 General test conditions
40 - 5.5.2 Test of immunity to electrostatic discharges
41 - 5.5.3 Test of immunity to electromagnetic HF fields
41 - 5.5.4 Fast transient burst test
42 - 5.5.5 Radio interference measurement
42 - 5.6 Tests of accuracy requirements
42 - 5.6.1 General test conditions
43 - 5.6.2 Test of influence quantities
44 - 5.6.3 Test of ambient temperature influence
44 - 5.6.4 Test of no-load condition
44 - 5.6.5 Test of starting condition
45 - 5.6.6 Test of meter constant
45 - 5.6.7 Interpretation of test results
46 - Annex A - Relationship between ambient air temperature and relative humidity
47 - Annex B - Test circuit diagram for d.c., even harmonics, odd harmonics and sub-harmonics
47 - B.1 Half wave rectification (d.c. and even harmonics)
49 - B.2 Phase-fired control (odd-harmonics)
51 - B.3 Burst control (sub-harmonics)
52 - Annex C - Voltage waveform for the tests of the effect of voltage dips
53 - Annex D - Electromagnet for testing the influence of externally produced magnetic fields
54 - Annex E - Test schedule
55 - Annex F - Test circuit diagram for the test of immunity to earth fault
56 - Annex G - Method for the determination of the resistance of certain components ultraviolet light
56 - G1 Scope
56 - G2 Principle
56 - G3 Test apparatus
56 - G4 Procedure
56 - G5 Report

Specifies requirements for electronic watthour meters of accuracy class 1, suitable for domestic, commercial and industrial use under Australian outdoor installation conditions. It is based on and has been reproduced from IEC 61036:1996, subject to major variations for Australian conditions. Australian variations, deletions and additions, are integrated throughout the text.

This International Standard applies only to newly manufactured static watt-hour meters of accuracy classes 1 and 2 class 1,for the measurement of alternating current electrical active energy of a frequency in the range 45 Hz to 65 Hz of 50 Hz and to their type tests only.It applies only to static watt-hour meters for indoor and outdoor Australian outdoor application consisting of a measuring element and register(s) enclosed together in a meter case. It also applies to operation indicator(s) and test output(s).It does not apply to:a) watt-hour meters where the voltage across the connection terminals exceeds 600 V (line-to-line voltage for meters for polyphase systems);b) portable meters;c) data interfaces to the register of the meter.Where the display and/or the memory(ies) is/are external or where other elements are enclosed in the meter case (such as maximum demand indicators, telemetering, time switches or remote control, etc.) this standard applies only to the metering section.This standard does not cover the acceptance tests and the conformity tests (both testing procedures are connected with legal requirements of the different countries and could only be taken care of partially). Regarding acceptance tests, a basic guideline is given in IEC 514.The reliability aspect is also not covered in this standard as there are no short-term test procedures available which would fit into type test documents to satisfactorily check this requirement.For plug-in meters, this Standard shall be read in conjunction with AS 1284.4.

First published as AS 1284.5-1992.
Second edition 2000.