SIST EN 62055-31:2007

SLOVENSKI STANDARD
01-marec-2007
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Electricity metering - Payment systems -- Part 31: Particular requirements - Static
payment meters for active energy (classes 1 and 2)
Messung der elektrischen Energie - Zhlersysteme mit Inkassofunktion -- Teil 31:
Besondere Anforderungen - Elektronische Inkasso-Wirkverbrauchszhler (Klassen 1 und
2)
Equipements de comptage de l'lectricit - Systmes paiement -- Partie 31: Prescriptions
particulires - Compteurs statiques paiement d'nergie active (classes 1 et 2)
Ta slovenski standard je istoveten z: EN 62055-31:2005
ICS:
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 62055-31
NORME EUROPÉENNE
EUROPÄISCHE NORM December 2005
ICS 91.140.50
English version
Electricity metering –
Payment systems
Part 31: Particular requirements –
Static payment meters for active energy (classes 1 and 2)
(IEC 62055-31:2005)
Equipements de comptage de l'électricité - Messung der elektrischen Energie -
Systèmes à paiement Zählersysteme mit Inkassofunktion
Partie 31: Prescriptions particulières - Teil 31: Besondere Anforderungen -
Compteurs statiques à paiement d'énergie Elektronische Inkasso-
active (classes 1 et 2) Wirkverbrauchszähler (Klassen 1 und 2)
(CEI 62055-31:2005) (IEC 62055-31:2005)

This European Standard was approved by CENELEC on 2005-11-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 62055-31:2005 E
Foreword
The text of document 13/1344/FDIS, future edition 1 of IEC 62055-31, prepared by IEC TC 13,
Equipment for electrical energy measurement and load control, was submitted to the IEC-CENELEC
parallel vote and was approved by CENELEC as EN 62055-31 on 2005-11-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2006-08-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-11-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62055-31:2005 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 62055-31:2005
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60050-300 2001 International Electrotechnical Vocabulary - -
- Electrical and electronic measurements
and measuring instruments
Part 311: General terms relating to
measurements
Part 312: General terms relating to
electrical measurements
Part 313: Types of electrical measuring
instruments
Part 314: Specific terms according to the
type of instrument
IEC 61000-4-5 1995 Electromagnetic compatibility (EMC) EN 61000-4-5 1995
Part 4-5: Testing and measurement
techniques - Surge immunity test

IEC 61008-1 1996 Residual current operated circuit-
+ A1 (mod) 2002 breakers without integral overcurrent EN 61008-1 2004
protection for household and similar uses
(RCCB's)
Part 1: General rules
IEC 61358 1996 Acceptance inspection for direct EN 61358 1996
connected alternating current static watt-
hour meters for active energy (classes 1
and 2)
IEC/TR 62051 1999 Electricity metering - Glossary of terms - -

IEC 62052-11 2003 Electricity metering equipment (AC) - EN 62052-11 2003
General requirements, tests and test
conditions
Part 11: Metering equipment
IEC 62053-21 2003 Electricity metering equipment (a.c.) - EN 62053-21 2003
Particular requirements
Part 21: Static meters for active energy
(classes 1 and 2)
IEC 62054-21 2004 Electricity metering (a.c.) - Tariff and load EN 62054-21 2004
control
Part 21: Particular requirements for time
switches
Publication Year Title EN/HD Year
IEC 62055-21 2005 Electricity metering - Payment systems - -
Part 21: Framework for standardization

INTERNATIONAL IEC
STANDARD 62055-31
First edition
2005-09
Electricity metering – Payment systems –
Part 31:
Particular requirements –
Static payment meters for active energy
(classes 1 and 2)
 IEC 2005  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
PRICE CODE
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МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 62055-31  IEC:2005(E)
CONTENTS
FOREWORD.4
INTRODUCTION.6

1 Scope.7
2 Normative references .8
3 Terms and definitions .8
3.1 General payment metering definitions .8
3.2 Definitions of tokens.10
3.3 Definitions of token carriers.11
3.4 Definitions relating to tokens and token carriers .13
3.5 Definitions related to load switching .14
3.6 Definitions related to timekeeping and tariff control .15
4 Standard electrical values .16
5 Mechanical requirements.16
5.1 General .16
5.2 General mechanical requirements .16
5.3 Case .16
5.4 Window .16
5.5 Terminals .17
5.6 Terminal covers.17
5.7 Creepage and clearance distances.17
5.8 Insulating-encased meter of protective class II .17
5.9 Resistance to heat and fire.17
5.10 Protection against penetration of dust and water .17
5.11 Display and indicators .17
5.12 Output device.19
5.13 Marking of meter .19
5.14 Token carrier interface .19
6 Climatic requirements.19
6.1 General .19
6.2 Temperature range.20
7 Electrical requirements .21
7.1 General .21
7.2 Influence of supply voltage .22
7.3 Power consumption .24
7.4 Influence of short-time overcurrents .24
7.5 Influence of heating.25
7.6 Influence of self-heating .25
7.7 Insulation .25
7.8 Electromagnetic compatibility (EMC) .25
7.9 Load switching .27
7.10 Auxiliary output switches .29
7.11 Token carrier acceptor interface test .29
8 Metering accuracy requirements.29

62055-31  IEC:2005(E) – 3 –
9 Functional requirements .29
9.1 General .29
9.2 Robustness of meter accounting process .30
10 Type test .31

Annex A (informative) Functional performance.32
A.1 Basic functionalities – prepayment mode .32
A.2 Additional functionalities .39
A.3 System compliance requirements .41

Annex B (informative) Reference model for a payment meter.42
B.1 General .42
B.2 Generalised payment meter instance .43
B.3 Functions in a single-part payment meter .45

Annex C (normative) Performance requirements for payment meters with load
switching utilisation categories UC2, UC3 and UC4 .49
C.1 Load switching capabilities .49
C.2 Normal operation.49
C.3 Electrical endurance.50
C.4 Line to load voltage surge withstand .51
C.5 Fault current making capacity .52
C.6 Short-circuit current carrying capacity.53
C.7 Minimum switched current .55
C.8 Dielectric strength.55
C.9 Sequence of tests.56

Annex D (normative) Requirements of timekeeping.57
D.1 General .57
D.2 Synchronous clocks.58
D.3 Crystal-controlled clocks.58
D.4 Tests of timekeeping accuracy.59
D.5 Effects of disturbances on timekeeping.60

Table C.1 – Summary of test currents for UC2, UC3 and UC4.49
Table C.2 – Test sequence and sample plan.56

– 4 – 62055-31  IEC:2005(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICITY METERING – PAYMENT SYSTEMS –

Part 31: Particular requirements –
Static payment meters for active energy
(classes 1 and 2)
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62055-31 has been prepared by IEC technical committee 13:
Equipment for electrical energy measurement and load control.
The text of this standard is based on the following documents:
FDIS Report on voting
13/1344/FDIS 13/1355/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

62055-31  IEC:2005(E) – 5 –
IEC 62055 consists of the following parts, under the general title Electricity metering –
Payment systems:
Part 21: Framework for standardization
Part 31: Static payment meters for active energy (Classes 1 and 2)
Part 41: Standard Transfer Specification – Application layer protocol for one-way token
carrier systems
Part 51: Standard Transfer Specification – Physical layer protocol for one-way numeric and
magnetic card token carriers
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

—————————
Under consideration.
– 6 – 62055-31  IEC:2005(E)
INTRODUCTION
Payment meters are used in situations where the supply of electrical energy to the load may
be interrupted or its restoration enabled under the control of the payment meter in relation to
a payment tariff agreed between the customer and the supplier. The payment meter is part of
a system that uses token carriers to pass payment information as tokens between a vending
network and the payment meters that include the meter accounting process.
The functions of a payment meter are to measure electrical energy consumed and to
decrement the available credit value in accordance with the metered consumption, and
possibly in accordance with the passing of time. This available credit value is incremented as
the result of payments made to the electricity supplier, and the meter accounting process
continuously calculates the balance of available credit held by the customer. When the
available credit value has been decremented to a predetermined value that is related to the
payment mode in use, a switch is used to interrupt the supply to the customer’s load.
However, additional features may be present in the payment meter, which prevent or delay
the opening of the switch, or limit further consumption to a low load level. Such “social”
features may include the provision of an emergency credit facility, the possibility of operation
in a fixed-payment mode, and the inhibiting of interruptions for certain periods of time.
In return for the payment (usually in cash) and depending on the particular type of system, the
customer may be issued with a single-use token on a disposable token carrier for the
equivalent value, or a reusable token carrier may be credited with that value, or the token may
be transmitted directly to the meter via a communications network (a so-called virtual token
carrier). “One-way” and “two-way” data transfer systems may be used, and the token carriers
may be: physical devices such as smart cards, or other electronic devices, or magnetic cards;
virtual token carriers where the token information is transferred by a remote communications
system; or numeric token carriers where sequences of digits are issued on a paper receipt
and entered via a keypad on the meter.
IEC 62051 provides some details of payment metering terminology in Clause 17.

62055-31  IEC:2005(E) – 7 –
ELECTRICITY METERING – PAYMENT SYSTEMS –

Part 31: Particular requirements –
Static payment meters for active energy (classes 1 and 2)

1 Scope
This part of IEC 62055 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. It
does not apply to static watt-hour payment meters where the voltage across the connection
terminals exceeds 600 V (line-to-line voltage for meters for polyphase systems).
It applies to payment meters for indoor application only, where the payment meter shall be
mounted as for normal service (i.e. together with a specified matching socket where
applicable).
Payment meters are implementations where all the main functional elements are incorporated
in a single enclosure, together with any specified matching socket. There are also multi-part
installations where the various main functional elements, such as the measuring element, the
user interface unit, token carrier interface, and the load switch are implemented in more than
one enclosure, involving additional interfaces. This part of IEC 62055 does not apply to multi-
part payment metering installations.
Functional requirements that apply to payment meters are also defined in this part of
IEC 62055, and include informative basic functional requirements and tests for the
prepayment mode of operation in Annex A. Allowances are made for the relatively wide range
of features, options, alternatives, and implementations that may be found in practice. The
diverse nature and functionality of payment meters prevent the comprehensive specification
of detailed test methods for all of these requirements. However, in this case, the requirements
are stated in such a way that tests can then be formulated to respect and validate the specific
functionality of the payment meter being tested.
This part of IEC 62055 does not cover specific functionality or performance requirements for
safety, circuit protection, isolation or similar purposes that may be specified through reference
to other specifications or standards.
This part of IEC 62055 does not cover software requirements. Software requirements for
basic energy meter metrology are under consideration for the IEC 62059 series of standards,
and in other organisations.
This part of IEC 62055 covers type-testing requirements only. For acceptance testing, the
concepts given in IEC 61358 may be used as a basic guideline.
Dependability aspects are addressed in the IEC 62059 series of standards.
This part of IEC 62055 does not cover conformity tests and system compliance tests that may
be required in connection with legal or other requirements of some markets.

– 8 – 62055-31  IEC:2005(E)
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 62051:1999, Electricity metering – Glossary of terms.
IEC 61358:1996, Acceptance inspection for direct-connected alternating current static watt-
hour meters for active energy (classes 1 and 2)
IEC 62052-11:2003, Electricity metering equipment (AC) – General requirements, tests and
test conditions – Part 11: Metering equipment
IEC 62053-21:2003, Electricity metering equipment (AC) – Particular requirements – Part 21:
Static meters for active energy (classes 1 and 2)
IEC 60050-300:2001, International Electrotechnical Vocabulary – Electrical and electronic
measurements and measuring instruments – Part 311: General terms relating to
measurements – Part 312: General terms relating to electrical measurements – Part 313:
Types of electrical measuring instruments – Part 314: Specific terms according to the type of
instrument
IEC 61000-4-5:1995, Electromagnetic compatibility (EMC) – Part 4-5: Testing and
measurement techniques – Surge immunity test
IEC 61008-1:1996, Residual current operated circuit-breakers without integral overcurrent
protection for household and similar uses (RCCBs) – Part 1: General rules
Amendment 1 (2002)
IEC 62055-21:2005, Electricity metering – Payment systems – Part 21: Framework for
standardisation
IEC 62054-21:2004, Electricity metering (a.c.) – Tariff and load control – Part 21: Particular
requirements for time switches
3 Terms and definitions
For the purposes of this part of IEC 62055, the terms and definitions given in IEC 60050-300,
IEC 62051, IEC 62052-11, and IEC 62055-21, as well as the following, apply.
Where there is a difference between definitions in IEC 62055-31 and those contained in other
referenced IEC standards, then those defined in IEC 62055-31 shall take precedence.
NOTE Some of these definitions cancel and replace those for the same term in IEC 62051, including some terms
in Clause 17 of that standard.
3.1 General payment metering definitions
3.1.1
a.c. withstand voltage
r.m.s. value of sinusoidal power frequency voltage that the equipment can withstand during
tests made under specified conditions and for a specified time
[IEC 60050:1987 604-03-40, modified]

62055-31  IEC:2005(E) – 9 –
3.1.2
available credit value
value of available credit (in monetary or energy units) usable for further consumption that is
either stored in the payment meter or calculated by it whenever required
3.1.3
fault current
current flowing at a given point of a network resulting from a fault at another point of this
network
[IEC 60050:1986 603-02-25]
3.1.4
load interface
terminal(s) where the customer’s load circuit is connected to the payment meter, or to a
specified matching socket, where applicable
3.1.5
multi-part installation
payment metering installation where the functional elements comprising the measuring
element(s); register(s), storage, and control; meter accounting process; user interface
including any physical token carrier interface; any virtual token carrier interface; load
switch(es); auxiliaries; plus supply interface and load interface are not arranged in the form of
a payment meter, but instead are partitioned into two or more units that require appropriate
mounting, connection, and commissioning
[IEC 62051, 17.45, modified]
3.1.6
payment meter
electricity meter with additional functionality that can be operated and controlled to allow the
flow of energy according to agreed payment modes
NOTE It includes the following functional elements: measuring element(s); register(s), storage, and control; meter
accounting process and any time-based functions; user interface including any physical token carrier interface; any
virtual token carrier interface; load switch(es); auxiliaries; plus supply interface and load interface. A payment
meter takes the form of a single unit, or a main unit that also employs a single specified matching socket for the
supply interface and load interface. In either case. some payment meter implementations may allow for some or all
of any time-based functions to be provided by an external unit connected to the payment meter, such as a time
switch, a ripple control receiver, or a radio receiver.
[IEC 62051, 17.47, modified]
NOTE Refer to Figure B.1 for the generalised block diagram of a payment meter instance.
3.1.7
payment metering installation
set of payment metering equipment installed and ready for use at a customer’s premises. This
includes mounting the equipment as appropriate, and where a multi-part installation is
involved, the connection of each unit of equipment as appropriate. It also includes the
connection of the supply network to the supply interface, the connection of the customer’s
load circuit to the load interface, and the commissioning of the equipment into an operational
state as a payment metering installation
3.1.8
prepayment mode
payment mode in which automatic interruption occurs when available credit is exhausted

– 10 – 62055-31  IEC:2005(E)
3.1.9
specified matching socket
in relation to a payment meter arranged as a plug-in unit, a specified matching socket
comprises a base with jaws to accept and connect to the plug-in unit, terminals for connection
of the supply network and the consumer load circuit, and appropriate secure fixing and
sealing arrangements. The payment meter is capable of meeting the relevant type-testing
requirements when it is properly installed in any specified matching socket
3.1.10
supply interface
terminal(s) where the supply network is connected to a payment meter, or to a specified
matching socket, where applicable
3.1.11
time-based credit
payment meter accounting functions that deal with the calculation and transacting of a (social)
grant of credit that is released on a scheduled time basis
NOTE See IEC 62055-21:2005, 13.8.3.
3.1.12
user interface
that part of a payment meter or payment metering installation that allows the customer to
monitor and operate the installation. It may also facilitate meter reading and inspection, and
metering services activities. Where physical token carriers are employed, it includes a token
carrier interface
3.2 Definitions of tokens
3.2.1
token
information content including an instruction issued on a token
carrier by a vending or management system that is capable of subsequent transfer to and
acceptance by a specific payment meter, or one of a group of meters, with appropriate
security
[IEC 62051, 17.66, modified]
NOTE In a more general sense, the token refers to the instruction and information being transferred, while the
token carrier refers to the physical device being used to carry the instruction and information, or to the
communications medium in the case of a virtual token carrier.
subset of data elements, containing an instruction and
information, that is present in the APDU of the application layer of the POS to Token Carrier
Interface, and which is also transferred to the payment meter by means of a token carrier
3.2.2
credit token
value token
token that represents an amount of credit in monetary or energy value for transfer from the
vending point to the payment meter
3.2.3
duplicate token
token that contains the same information as a token that has already been issued, and hence
may also be a valid token
NOTE 1 This is not the same as a replacement token (refer also to 3.4.9).
NOTE 2 A duplicate token is a reissue of the same token that was previously issued and is identical to it in all
aspects; whereas a replacement token is a newly generated token in place of a previously generated token and
may not be identical to it in all aspects.

62055-31  IEC:2005(E) – 11 –
3.2.4
multiple-use token
token (such as a test token) that can be used for more than one successful session in a
payment meter or possibly with each in a group of meters. These are typically used for meter
reading or service purposes on repeated occasions
3.2.5
no-value token
token that does not result in a financial advantage or disadvantage to the consumer, which
may contain meter configuration data, or instructions to perform certain tests, or to display
certain values on the user interface, or to retrieve certain data from the meter and return it on
a token carrier
NOTE This is as opposed to value token.
3.2.6
replacement token
see 3.4.9
NOTE This is not the same as a duplicate token (see 3.2.3).
3.2.7
single-use token
token (such as a credit token) that can only be used for one successful session in a payment
meter
3.2.8
valid token
in relation to a specific payment meter (or group of payment meters), a token that is capable
of being processed successfully by the meter(s)
3.2.9
value token
see credit token (3.2.2)
3.3 Definitions of token carriers
3.3.1
token carrier
devices or media used to transport and present token
information to payment meters, such as printed paper, magnetic card, electronic memory
card/key, microprocessor card, or data communications networks. The token carrier may also
carry ancillary control or monitoring information to or from the payment meter, depending
upon system type and requirements
medium that is used in the physical layer of the POS to Token
Carrier Interface, onto which the token is modulated or encoded, and which serves to carry
the token from the point where it is generated to the remote payment meter, where it is
received
3.3.2
blank token carrier
physical token carrier that has not been processed at the vending point or elsewhere and
hence contains no specific data

– 12 – 62055-31  IEC:2005(E)
3.3.3
disposable token carrier
token carrier that is not capable of further use once it has been accepted or used, such as a
paper-based magnetic card
3.3.4
machine-readable token carrier
physical or virtual token carrier carrying token information that is capable of being read and
processed automatically on presentation to an appropriate payment meter, without further
manual operation
EXAMPLE A token employing a magnetic card as the token carrier.
3.3.5
memory token carrier
physical token carrier containing a non-volatile memory device, in which the token is
electronically encoded and stored while it is being transported
3.3.6
microprocessor token carrier
physical token carrier containing a microprocessor device with non-volatile memory, in which
the token is electronically encoded and stored while it is being transported. In addition to the
token information, the microprocessor token carrier may also contain an application
programme and associated data
3.3.7
numeric token carrier
token transfer method where the token information can be represented in a secure manner by
a visible and human readable sequence of numeric digits (typically 20 digits printed on a
receipt)
NOTE They may be entered into a payment meter via a keypad interface for evaluation and action.
3.3.8
one-way token carrier
physical or virtual token carrier which is used for the transfer of credit and possibly tariff and
configuration data in a single direction from the vending point or the management system to
the payment meter
3.3.9
physical token carrier
token carrier that requires a human to transport it at least part of the way between the point
where the token is loaded onto the token carrier and the point where it is retrieved from the
token carrier by the payment meter
NOTE Examples of physical token carriers are: printed numbers; magnetic cards; printed bar codes; electronic
storage in memory devices such as smart cards or memory keys; and audio messages dictated by interactive voice
response equipment.
3.3.10
rechargeable token carrier
refer to 3.3.11 reusable token carrier
3.3.11
reusable token carrier
rechargeable token carrier
physical token carrier that can be used for multiple sessions for transportation of tokens

62055-31  IEC:2005(E) – 13 –
3.3.12
two-way token carrier
physical or virtual token carrier which is used for the transfer of credit and/or tariff and
configuration data from the vending point or management system to the payment meter and
response data from the payment meter back to the vending point or management system for
further processing, where response data may possibly return on a subsequent vending
transaction
NOTE Response data may contain consumption information, tamper information, accountancy information and
token status with or without time and date stamps.
3.3.13
virtual token carrier
token carrier that does not require a human to transport it between the point where the token
is loaded onto the token carrier and the point where it is retrieved from the token carrier by
the payment meter
NOTE Examples of virtual token carriers are: modems on PLC, PSTN, GSM, GPRS and Radio; LAN; WAN and
direct local connection.
3.4 Definitions relating to tokens and token carriers
3.4.1
physical token carrier interface
complete interface protocol stack that includes any token carrier acceptor or keypad for a
physical token carrier, the physical layer protocol and application layer protocol, plus any
intermediate protocol layers
3.4.2
token acceptance
recognition of the successful completion of the processing of any token that was presented to
the payment meter
NOTE Typically, this might involve the addition of token credit to the meter’s accounting register, cancellation of
the token information from the token carrier so as to prevent subsequent acceptance by any meter, and a visible
indication to the user on the user interface. Similarly, this may also be applicable to any tariff or configuration data
included on the token carrier.
3.4.3
token cancellation
1) process of erasing or invalidating information contained in a valid token upon its
acceptance by a payment meter, to prevent its reuse;
2) process of erasing or invalidating information contained in a token after it has been
created, but before it is presented to a payment meter. This typically happens when the
vending operator makes a mistake or if a technical problem occurs during the vending
process
3.4.4
token carrier acceptor
physical part of a physical token carrier interface, which mechanically accepts and holds the
token carrier in the correct position for the token transfer process to take place between the
token carrier and the payment meter. Examples are: smart card acceptor; magnetic card
acceptor; memory key acceptor
3.4.5
token carrier charging
loading of a token and tariff or configuration data onto a token carrier at a vending point or a
management system
– 14 – 62055-31  IEC:2005(E)
3.4.6
token carrier interface
token carrier interface permits the manual or automatic entry of tokens into a payment meter
NOTE 1 For example, it may be a keypad for numeric tokens, or a physical token carrier acceptor, or a
communications connection to a local or remote machine for a virtual token carrier interface.
NOTE 2 The token carrier interface may also be used to pass additional information to or from the payment meter,
such as for the purposes of payment system management.
3.4.7
token credit
value of credit or energy to be transferred from the vending point to the payment meter in the
form of a token on a token carrier
3.4.8
token rejection
this occurs when a token has been presented to but has not been accepted by a payment
meter, and has not been erased or invalidated. In the case of a valid token not being
accepted, the token may be presented and accepted at a later time when conditions allow
3.4.9
token replacement
token that replaces a previously issued token in value. Physical token carriers may require a
blank token carrier to be configured for the customer’s meter
NOTE A replacement token is a newly generated token in place of a previously generated token and may not be
identical to it in all aspects; whereas a duplicate token is a reissue of the same token that was previously issued
and is identical to it in all aspects.
3.4.10
virtual token carrier interface
complete interface protocol stack that includes the physical layer protocol and application
layer protocol, plus any intermediate protocol layers
3.5 Definitions related to load switching
3.5.1
minimum switched current
smallest current that the payment meter is able to make, carry and break at the rated breaking
voltage and under prescribed conditions
3.5.2
prospective current
specified root-mean-square or peak value of current that would flow in a circuit if the unit
under test were to be replaced with a conductor having negligible impedance
3.5.3
rated breaking current
I
c
root-mean-square value of the current that the payment meter is able to make, carry
continuously and break at the rated breaking voltage and under prescribed conditions
3.5.4
rated breaking voltage
U
c
root-mean-square value of the supply voltage, as measured on the output terminals of the
payment meter connected to the load circuit, at which the payment meter is able to break the
rated breaking current
62055-31  IEC:2005(E) – 15 –
3.5.5
trip-free design
design which ensures that the moving contacts of the load switch return to and remain in the
open position when the automatic o
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