I.S. EN 62055-31:2006

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
   3.1 General payment metering definitions
   3.2 Definitions of tokens
   3.3 Definitions of token carriers
   3.4 Definitions relating to tokens and
        token carriers
   3.5 Definitions related to load switching
   3.6 Definitions related to timekeeping and
        tariff control
4 Standard electrical values
5 Mechanical requirements
   5.1 General
   5.2 General mechanical requirements
   5.3 Case
   5.4 Window
   5.5 Terminals
   5.6 Terminal covers
   5.7 Creepage and clearance distances
   5.8 Insulating-encased meter of protective
        class II
   5.9 Resistance to heat and fire
   5.10 Protection against penetration of
        dust and water
   5.11 Display and indicators
   5.12 Output device
   5.13 Marking of meter
   5.14 Token carrier interface
6 Climatic requirements
   6.1 General
   6.2 Temperature range
7 Electrical requirements
   7.1 General
   7.2 Influence of supply voltage
   7.3 Power consumption
   7.4 Influence of short-time overcurrents
   7.5 Influence of heating
   7.6 Influence of self-heating
   7.7 Insulation
   7.8 Electromagnetic compatibility (EMC)
   7.9 Load switching
   7.10 Auxiliary output switches
   7.11 Token carrier acceptor interface test
8 Metering accuracy requirements
9 Functional requirements
   9.1 General
   9.2 Robustness of meter accounting process
10 Type test
Annex A (informative) Functional performance
   A.1 Basic functionalities - prepayment mode
   A.2 Additional functionalities
   A.3 System compliance requirements
Annex B (informative) Reference model for a
                       payment meter
   B.1 General
   B.2 Generalised payment meter instance
   B.3 Functions in a single-part payment meter
Annex C (normative) Performance requirements for
                      payment meters with load
                      switching utilisation categories
                      UC2, UC3 and UC4
   C.1 Load switching capabilities
   C.2 Normal operation
   C.3 Electrical endurance
   C.4 Line to load voltage surge withstand
   C.5 Fault current making capacity
   C.6 Short-circuit current carrying capacity
   C.7 Minimum switched current
   C.8 Dielectric strength
   C.9 Sequence of tests
Annex D (normative) Requirements of timekeeping
   D.1 General
   D.2 Synchronous clocks
   D.3 Crystal-controlled clocks
   D.4 Tests of timekeeping accuracy
   D.5 Effects of disturbances on timekeeping
Annex ZA (normative) Normative references to international
                      publications with their corresponding
                      European publications

Applies to newly manufactured, static watt-hour payment meters of accuracy classes 1 and 2 for direct connection, for the measurement of alternating current electrical energy consumption of a frequency in the range 45 Hz to 65 Hz that include a load switch for the purpose of interruption or restoration of the electricity supply to the load in accordance with the current value of the available credit maintained in the payment meter.