EN 50463-2:2012

SLOVENSKI STANDARD
01-marec-2013
1DGRPHãþD
SIST EN 50463:2008
Železniške naprave - Merjenje energije na vlaku - 2. del: Merjenje energije
Railway applications - Energy measurement on board trains - Part 2: Energy measuring
Bahnanwendungen - Energiemessung auf Bahnfahrzeugen - Teil 2: Energiemessung
Applications ferroviaires - Mesure d'énergie à bord des trains - Partie 2 : Mesure
d'énergie
Ta slovenski standard je istoveten z: EN 50463-2:2012
ICS:
45.060.10 9OHþQDYR]LOD Tractive stock
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50463-2
NORME EUROPÉENNE
December 2012
EUROPÄISCHE NORM
ICS 45.060.10 Supersedes EN 50463:2007 (partially)

English version
Railway applications -
Energy measurement on board trains -
Part 2: Energy measuring
Applications ferroviaires -  Bahnanwendungen -
Mesure d'énergie à bord des trains - Energiemessung auf Bahnfahrzeugen -
Partie 2 : Mesure d'énergie Teil 2: Energiemessung

This European Standard was approved by CENELEC on 2012-10-15. 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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same status as the official versions.

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

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

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50463-2:2012 E
Contents
Foreword .5
Introduction .6
1 Scope . 8
2 Normative references . 9
3 Terms, definitions, abbreviations and symbols .10
3.1 Terms and definitions . 10
3.2 Abbreviations . 13
3.3 Symbols . 14
4 Requirements .14
4.1 General . 14
4.2 Energy Measurement Function (EMF) . 15
4.3 Sensors . 19
4.4 Energy Calculation Function (ECF) . 31
5 Conformity assessment .42
5.1 General . 42
5.2 Testing framework . 43
5.3 Design review . 44
5.4 Type testing . 45
5.5 Routine test . 68
Annex A (normative) Test with magnetic induction of external origin .71
Annex B (normative) EMF Configurations .73
B.1 Background . 73
B.2 General . 73
B.3 EMF with several CMF’s in parallel . 73
B.4 EMF with several VMF’s connected to one ECF . 74
B.5 EMF with several pairs of VMF and CMF . 75
B.6 Several EMF’s in parallel . 75
B.7 One VMF or CMF connected to several ECFs . 76
B.8 EMF without VMF . 76
Annex C (informative) Expressing EMF accuracy .77
C.1 Summary . 77
C.2 Error limits or uncertainty . 77
C.3 Presentation of error limits . 78
C.4 Uncertainty calculations . 79
Annex D (informative) Re-verification and defining of its regime recommendations .84
D.1 Re-verification . 84
D.2 Defining re-verification regime recommendations . 85

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Annex E (informative) Durability test .87
E.1 Durability test . 87
Annex ZZ (informative) Coverage of Essential Requirements of EU Directives .91
Bibliography . 92

Figures
Figure 1 – EMS functional structure and dataflow diagram .7
Figure 2 – EMF functional block diagram .8
Figure 3 – Example of energy index value . 11
Figure 4 – Example of maximum percentage error for a VMF of class 0,5 R and a VMF of class
1,0 R with input signal in the range U ≤ U ≤ U . 24
min1 max2
Figure 5 – Example of maximum percentage error for a CMF class 1,0 R a.c. with input signals
in the range 10 % I ≤ I ≤ 120 % I , 5 % I ≤ I < 10 % I and 1 % I ≤ I < 5 % I . 29
n n n n n n
Figure 6 – Primary current and voltage ranges . 36
Figure 7 – Example of maximum percentage error for an ECF of class 0,5 R and an ECF of
class 1,0 R with input signals in Area 1 and Area 2 . 38
Figure 8 – Test point matrix for ECF accuracy tests (type test) . 59
Figure 9 – Test point matrix for tests of ambient temperature variation and influence quantities . 60
Figure 10 – Test circuit diagram for determining the influence on accuracy of odd harmonics or
sub-harmonics in the current circuit . 63
Figure 11 – Phase-fired waveform (shown for 50 Hz) . 63
Figure 12 – Analysis of harmonic content of phase-fired waveform (shown for 50 Hz) . 64
Figure 13 – Burst fire waveform (shown for 50 Hz) . 64
Figure 14 – Analysis of harmonics (shown for 50 Hz) . 65
Figure 15 – Test point matrix for ECF Accuracy Tests (type test) . 70
Figure A.1 – Test configuration for test method 1 . 71
Figure A.2 – Test configuration for test method 2 . 72
Figure B.1 – EMF with several CMF’s in parallel . 73
Figure B.2 – EMF with several VMF’s connected to one ECF . 74
Figure B.3 – EMF with several pairs of VMF and CMF . 75
Figure B.4 – EMF with several ECF’s . 75
Figure B.5 – One VMF connected to two ECF’s . 76
Figure B.6 – EMF without VMF . 76
Tables
Table 1 – Nominal traction supply system voltages . 16
Table 2 – Reference conditions . 17
Table 3 – EMF percentage error limits . 18
Table 4 – Percentage error limits - voltage sensor . 23
Table 5 – Maximum percentage error for a VMF including ambient temperature variation . 23
Table 6 – Temperature coefficient for VMF . 24
Table 7 – Influence quantities for voltage sensors . 25
Table 8 – Percentage error limits – a.c. current sensor . 28

Table 9 – Percentage error limits – d.c. current sensor . 28
Table 10 – Maximum percentage error for a CMF including ambient temperature variation . 29
Table 11 – Temperature coefficient for CMF . 30
Table 12 – Percentage error limits with harmonics – a.c. current sensor . 30
Table 13 – Influence quantities for current sensors . 31
Table 14 – Variations due to short-time overcurrents . 35
Table 15 – Variations due to self-heating . 35
Table 16 – ECF percentage error limits for active energy . 36
Table 17 – Maximum percentage error for an ECF including ambient temperature variation . 37
Table 18 – Temperature coefficient for the ECF . 38
Table 19 – Influence quantities for the ECF . 39
Table 20 – Test current for harmonics . 52

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Foreword
This document (EN 50463-2:2012) has been prepared by CLC/TC9X "Electrical and electronic
applications for railways".
The following dates are proposed:
(dop) 2013-10-15
• latest date by which this document has to be
implemented at national level by publication of
an identical national standard or by
endorsement
(dow) 2015-10-15
• latest date by which the national standards
conflicting with this document have to
be withdrawn
This document (EN 50463-2:2012), together with parts 1, 3, 4 and 5, supersedes EN 50463:2007.
EN 50463-1:2012 includes the following significant technical changes with respect to EN 50463:2007:
 the series is based on and supersedes EN 50463:2007;
 the scope is extended, new requirements are introduced and conformity assessment
arrangements are added.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive 2008/57/EC amended by Commission Directive 2011/18/EU, see
informative Annex ZZ, which is an integral part of this document.
This document is Part 2 of the EN 50463 series which consists of the following parts, under the
common title Railway applications - Energy measurement on board trains:
Part 1, General;
Part 2, Energy measuring;
Part 3, Data handling;
Part 4, Communication;
Part 5, Conformity assessment.
EN 50463-2 follows the functional guidelines description in Annex A “Principles of conformity
assessment” of EN ISO/IEC 17000 tailored to the Energy Measurement System (EMS).
The requirements for Energy Measurement Systems in the relevant Technical Specifications for
Interoperability are supported by this series of European Standards.

Introduction
The Energy Measurement System provides measurement and data suitable for billing and may also
be used for energy management, e.g. energy saving.
This series of European Standards uses the functional approach to describe the Energy Measurement
System. These functions are implemented in one or more physical devices. The user of this series of
standards is free to choose the physical implementation arrangements.
Structure and main contents of the EN 50463 series
This series of European Standards is divided into five parts. The titles and brief descriptions of each
part are given below:
EN 50463-1 – General
The scope of EN 50463-1 is the Energy Measurement System (EMS).
EN 50463-1 provides system level requirements for the complete EMS and common requirements for
all devices implementing one or more functions of the EMS.
EN 50463-2 – Energy measuring
The scope of EN 50463-2 is the Energy Measurement Function (EMF).
The EMF provides measurement of the consumed and regenerated active energy of a traction unit. If
the traction unit is designed for use on a.c. traction supply systems the EMF also provides
measurement of reactive energy. The EMF provides the measured quantities via an interface to the
Data Handling System.
The EMF consists of the three functions: Voltage Measurement Function, Current Measurement
Function and Energy Calculation Function. For each of these functions, accuracy classes are specified
and associated reference conditions are defined. This part also defines all specific requirements for all
functions of the EMF.
The Voltage Measurement Function measures the voltage of the Contact Line system and the Current
Measurement Function measures the current taken from and returned to the Contact Line system.
These functions provide signal inputs to the Energy Calculation Function.
The Energy Calculation Function inputs the signals from the Current and Voltage Measurement
Functions and calculates a set of values representing the consumed and regenerated energies. These
values are transferred to the Data Handling System and are used in the creation of Compiled Energy
Billing Data.
The standard has been developed taking into account that in some applications the EMF may be
subjected to legal metrological control. All relevant metrological aspects are covered in this part of
EN 50463.
EN 50463-2 also defines the conformity assessment of the EMF.
EN 50463-3 – Data handling
The scope of EN 50463-3 is the Data Handling System (DHS).
The on board DHS receives, produces and stores data, ready for transmission to any authorised
receiver of data on board or on ground. The main goal of the DHS is to produce Compiled Energy
Billing Data and transfer it to an on ground Data Collection Service (DCS). The DHS can support other
functionality on board or on ground with data, as long as this does not conflict with the main goal.

- 7 - EN 50463-2:2012
EN 50463-3 also defines the conformity assessment of the DHS.
EN 50463-4 – Communication
The scope of EN 50463-4 is the communication services.
Part 4 of EN 50463 gives requirements and guidance regarding the data communication between the
functions implemented within EMS as well as between such functions and other on board units where
data are exchanged using a communications protocol stack over a dedicated physical interface or a
shared network.
It includes the on board to ground communication service and covers the requirements necessary to
support data transfer between DHS and DCS.
EN 50463-4 also defines the conformity assessment of the communications services.
EN 50463-5 – Conformity assessment
The scope of EN 50463-5 is the conformity assessment procedures for the EMS.
EN 50463-5 also covers re-verification procedures and conformity assessment in the event of the
replacement of a device of the EMS.
EMS functional structure and dataflow
Figure 1 illustrates the functional structure of the EMS, the main sub-functions and the structure of the
dataflow and is informative only. Only the main interfaces required by this standard are displayed by
arrows.
Because the communication function is distributed throughout the EMS, it has been omitted for clarity.
Not all interfaces are shown.
Time Reference Source
Location Reference Source
Current Measurement Function
Voltage Measurement Function
Data
Energy Calculation Function Data Handling System
Collection
Service
Energy Measurement Function Data Handling System (DCS)
(EMF) (DHS)
EN 50463-2 (Energy Measuring) EN 50463-3 (Data Handling)
Energy Measurement System (EMS)
EN 50463-1 (General), EN 50463-4 (Communication), EN 50463-5 (Conformity Assessment)

On board (Traction Unit)
On ground
Figure 1 – EMS functional structure and dataflow diagram

1 Scope
This European Standard covers the requirements applicable to the Energy Measurement Function
(EMF) of an Energy Measurement System (EMS) for use on board traction units for measurement of
energy supplied directly from/to the Contact Line system.
This European Standard also gives requirements for the Current Measurement Function (e.g. current
sensor), the Voltage Measurement Function (e.g. voltage sensor) and the Energy Calculation Function
(e.g. energy meter).
The Conformity Assessment arrangements for the Voltage Measurement Function, Current
Measurement Function, the Energy Calculation Function and a complete Energy Measurement
Function are also specified in this document.
The standard has been developed taking into account that in some applications the EMF may be
subjected to legal metrological control. All relevant metrological aspects are covered in this part.
Figure 2 shows the flow between the functional blocks of the EMF. Only connections between the
functional blocks required by this standard are displayed.

Figure 2 – EMF functional block diagram

- 9 - EN 50463-2:2012
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
CEN/TS 45545-2:2009, Railway applications — Fire protection on railway vehicles — Part 2:
Requirements for fire behaviour of materials and components
CLC/TS 45545-5:2009, Railway applications — Fire protection on railway vehicles — Part 5: Fire
safety requirements for electrical equipment including that of trolley buses, track guided buses and
magnetic levitation vehicles
EN 50121-1:2006, Railway applications — Electromagnetic compatibility — Part 1: General
EN 50121-3-2:2006, Railway applications — Electromagnetic compatibility — Part 3-2: Rolling stock
— Apparatus
EN 50123-1:2003, Railway applications — Fixed installations — D.C. switchgear — Part 1: General
EN 50124-1:2001, Railway applications — Insulation coordination — Part 1: Basic requirements —
Clearances and creepage distances for all electrical and electronic equipment
EN 50125-1, Railway applications — Environmental conditions for equipment — Part 1: Equipment on
board rolling stock
EN 50155:2007, Railway applications — Electronic equipment used on rolling stock
EN 50163:2004, Railway applications — Supply voltages of traction systems
EN 50388:2005, Railway applications — Power supply and rolling stock — Technical criteria for the
coordination between power supply (substation) and rolling stock to achieve interoperability
EN 50463-1:2012, Railway applications — Energy measurement on board trains — Part 1: General
EN 50463-3:2012, Railway applications — Energy measurement on board trains — Part 3: Data
handling
EN 50463-4:2012, Railway applications — Energy measurement on board trains — Part 4:
Communication
EN 50463-5:2012, Railway applications — Energy measurement on board trains —Part 5: Conformity
assessment
EN 60044 (all parts), Instrument transformers (IEC 60044, all parts)
EN 60068-2-1:2007, Environmental testing — Part 2-1: Tests — Test A: Cold (IEC 60068-2-1:2007)
EN 60068-2-2:2008, Environmental testing — Part 2-2: Tests — Test B: Dry heat
(IEC 60068-2-2:2007)
EN 60068-2-30:2005, Environmental testing — Part 2-30: Tests — Test Test Db: Damp heat, cyclic
(12 h + 12 h cycle) (IEC 60068-2-30:2005)
EN 60077-4:2003, Railway applications — Electric equipment for rolling stock — Part 4:
Electrotechnical components — Rules for AC circuit-breakers (IEC 60077-4:2003)
EN 60085:2008, Electrical insulation — Thermal evaluation and designation (IEC 60085:2007)

EN 60529:1991+A1:2000, Degrees of protection provided by enclosures (IP Code)
(IEC 60529:1989+A1:1999)
EN 61000-4-2:2009, Electromagnetic compatibility (EMC) — Part 4-2: Testing and measurement
techniques — Electrostatic discharge immunity test (IEC 61000-4-2:2008)
EN 61000-4-3:2006+A1:2008, Electromagnetic compatibility (EMC) — Part 4-3: Testing and
measurement techniques — Radiated, radio-frequency, electromagnetic field immunity test
(IEC 61000-4-3:2006+A1:2007)
EN 61000-4-4:2004, Electromagnetic compatibility (EMC) — Part 4-4: Testing and measurement
techniques — Electrical fast transient/burst immunity test (IEC 61000-4-4:2004)
EN 61000-4-5:2006, Electromagnetic compatibility (EMC) — Part 4-5: Testing and measurement
techniques — Surge immunity test (IEC 61000-4-5:2005)
EN 61000-4-6:2009, Electromagnetic compatibility (EMC) — Part 4-6: Testing and measurement
techniques — Immunity to conducted disturbances, induced by radio-frequency fields
(IEC 61000-4-6:2008)
EN 61373:2010, Railway applications — Rolling stock equipment — Shock and vibration tests
(IEC 61373:2010)
IEC 60028:1925, International standard of resistance for copper
IEC 60121:1960, Recommendation for commercial annealed aluminium electrical conductor wire
3 Terms, definitions, abbreviations and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 50463-1:2012 and the
following apply.
NOTE When possible, the following definitions have been taken from the relevant chapters of the International Electrotechnical
Vocabulary (IEV), IEC 60050-311, IEC 60050-312, IEC 60050-313, IEC 60050-314, IEC 60050-321 and IEC 60050-811. In
such cases, the appropriate IEV reference is given. Certain new definitions or modifications of IEV definitions have been added
in this standard in order to facilitate understanding. Expression of the performance of electrical and electronic measuring
equipment has been taken from EN 60359.
3.1.1
accuracy class
designation that identifies a set of error limits for measured quantities under reference conditions and
the additional percentage errors due to influence quantities
Note 1 to entry: An individual accuracy class is associated with each metrological function of the EMF
Note 2 to entry: The suffix “R” is used to differentiate classes according to this standard from other technical standards.
3.1.2
consumed active energy
active energy taken from the Contact Line by the traction unit on which the EMF is installed
3.1.3
consumed reactive energy
reactive energy taken from the Contact Line by the traction unit on which the EMF is installed
3.1.4
electronic sensor
device in which electronic circuits are used to process a measured signal

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Note 1 to entry: Electronic circuits for processing the measurement signal include items such as analogue to digital
converters, signal amplifiers etc.
3.1.5
energy delta value
energy consumed and/or regenerated during a time period
Note 1 to entry: See Figure 3 for example.
3.1.6
energy index value
total accumulated energy consumption and/or energy regeneration at the end of a time period
Note 1 to entry: See Figure 3 for example.
2350 2360 2372 2379 2393 2404
energy index value:
10 12 7 14 11
energy delta value:
kWh
Timeline:
10:35 10:40 10:45 10:50 10:55 11:00

Figure 3 – Example of energy index value

3.1.7
flag
code indicating information relevant to the functioning of the EMS
Note 1 to entry: Examples include data quality, operational status, etc.
3.1.8
index value overrun
return to zero of the index value after reaching the maximum value allowed by the register
3.1.9
influence quantity
external condition which affects metrological performance
3.1.10
k-factor
multiplicand necessary to convert a secondary value into a primary value
Note 1 to entry: Each Voltage Measurement Function and/or Current Measurement Function can have a specific k-factor. If
the k-factor is applied to Energy Data, this factor is the product of the k-factors of the Voltage Measurement Function and/or
Current Measurement Function used.
3.1.11
percentage error
value given by the following formula:
measured quantity− true quantity
Percentage error= ×100
true quantity
Note 1 to entry: Since the true quantity cannot be determined, it is approximated by a quantity with a stated uncertainty that
can be traced to standards agreed upon between supplier and purchaser or to national standards.

3.1.12
phase influence function
function of the real or apparent phase angle between a measured voltage and a measured current
Note 1 to entry: Phase influence function expressed as a Power Factor refers to measurements of real and apparent
powers and energies, while sin φ refers to reactive powers and energies.
Note 2 to entry: For d.c. measurements the requirements for a phase influence function of 1 need to be used.
3.1.13
Power Factor
PF
ratio of the absolute value of the active power P to the apparent power S
[SOURCE: IEV 131-11-46, modified]
3.1.14
primary value
value referred to the measuring inputs of an EMF
3.1.15
rated continuous thermal current
I
CMF,cth
value of current which can be permitted to flow continuously into the primary input of a current sensor
3.1.16
rated dynamic current
I
CMF,dyn
peak value of the primary current which a current sensor will withstand without being damaged
3.1.17
rated primary current of the EMF
I
n,EMF
value of current which is used to define the relevant performance of the EMF
Note 1 to entry: The term current refers to r.m.s. value for a.c. unless otherwise specified.
3.1.18
rated primary voltage of the EMF
U
n,EMF
value of voltage which is used to define the relevant performance of the EMF
Note 1 to entry: The term voltage refers to r.m.s. value for a.c. unless otherwise specified.
3.1.19
rated short-time thermal current
I
CMF,th
value of the primary current which a current sensor will withstand for a specified time period without
being damaged
3.1.20
rated traction unit current
maximum current that the traction unit is designed to draw from the Contact Line when operating
under normal conditions and with a voltage in the range from U to U according to EN 50163
min1 max2
3.1.21
reference conditions
set of influence quantities, with reference values and tolerances, with respect to which the error limits
are specified for an input quantity range

- 13 - EN 50463-2:2012
[SOURCE: IEV 311-06-02, modified]
3.1.22
regenerated active energy
active energy fed back into the Contact Line by the traction unit on which the EMF is installed
3.1.23
regenerated reactive energy
reactive energy fed back into the Contact Line by the traction unit on which the EMF is installed
3.1.24
register
electronic device which stores the information representing the measured energy and associated flags
Note 1 to entry: Registers can also be accessed and displayed locally via a service tool and if available via a local display.
[SOURCE: IEV 314-07-09, modified]
3.1.25
response time
t
S,r
duration between the instant of a step change in the measured quantity and the instant when the
output signal reaches 90 % of the intended value
[SOURCE: IEV 394-39-09, modified]
3.1.26
secondary value
value of current, voltage, power or energy which needs to be multiplied by a k-factor to become a
primary value
3.1.27
sensor
device performing the VMF or CMF
Note 1 to entry: Sensor is used as a general term and encompasses a wide variety of technology / devices for
measurement purposes e.g. inductive transformers, hall-effect devices, capacitive and resistive dividers, resistive shunts etc.
Note 2 to entry: One sensor may perform multiple functions.
3.1.28
temperature coefficient
ratio between the temperature change and the resulting change in measurement error
3.1.29
time period
period of time for which energy data is produced
3.1.30
Time Reference Period
TRP
period of time for which CEBD is produced
3.2 Abbreviations
For the purposes of this document, the following abbreviations apply.
All the abbreviations are listed in alphabetical order.
CEBD Compiled Energy Billing Data

CMF Current Measurement Function
DHS Data Handling System
ECF Energy Calculation Function
EMF Energy Measurement Function
EMS Energy Measurement System
EUT Equipment under test
PF Power Factor
RAMS Reliability, Availability, Maintenance and Safety
TRP Time Reference Period
VMF Voltage Measurement Function

3.3 Symbols
For the purposes of this document, the following symbols apply.
f maximum frequency without aliasing
a
f rated frequency
n
I rated continuous thermal current
cth
CMF,
I rated dynamic current
CMF,dyn
I rated short-time thermal current
CMF,th
I rated primary current of the CMF
n,CMF
I rated primary current of the ECF
n,ECF
I rated primary current of the EMF
n,EMF
t response time
s,r
U highest permanent voltage according to EN 50163
max1
U highest non permanent voltage according to EN 50163
max2
U highest long term overvoltage according to EN 50163
max3
U lowest permanent voltage according to EN 50163
min1
U lowest non permanent voltage according to EN 50163
min2
U rated primary voltage of the EMF
n,EMF
U rated primary voltage of the VMF
n,VMF
ε maximum percentage (ratio) error allowed in accordance with the selected accuracy class
CMF
for the CMF
ε maximum percentage error allowed in accordance with the selected accuracy class for
ECF
the ECF
ε calculated maximum percentage error of the EMF
EMF
ε maximum percentage (ratio) error allowed in accordance with the selected accuracy class
VMF
for the VMF
4 Requirements
4.1 General
The requirements in EN 50463-1:2012, Clause 4, apply to any device containing one or more
functions of the Energy Measurement Function (EMF), where applicable. EN 50463-2 defines
additional requirements for a complete EMF and to any device comprising one or more functions of
the EMF.
- 15 - EN 50463-2:2012
4.2 Energy Measurement Function (EMF)
4.2.1 General
The Energy Measurement Function (EMF) is made up of the following functions, which can be
contained in one or more devices:
• Voltage Measurement Function (VMF);
• Current Measurement Function (CMF);
• Energy Calculation Function (ECF).
NOTE 1 In this document, the voltage sensor and current sensor are used as terms for the device implementing measurement
functions. It is possible that one or more devices may be used to fulfil the role of one function. It is also possible that different
functions are combined in one device.
NOTE 2 Multiple CMFs and VMFs can be used with a single ECF (see Annex B).
The purpose of the EMF is to measure the voltage and current, calculate the energy and produce
energy data.
The EMF provides energy data through an interface to the Data Handling System (DHS).
4.2.1.1 General requirements
If functions are grouped together in a single device, such grouping shall not degrade the performance
(including accuracy) of the system.
4.2.1.2 Marking of the EMF
Devices containing the EMF will have the marking as specified in EN 50463-1:2012, 4.3.1.1. In
addition, all devices that include functions which are subject to legal metrological control shall include
a metrological mark.
If different functions are included in one device marking need not to be duplicated.
4.2.1.3 Essential information
For all devices containing the EMF the essential information as specified in EN 50463-1:2012, 4.3.1.2
shall be available in a format (e.g. hardcopy or electronic) agreed between supplier and purchaser.
The k-factor of the EMF shall also be stated.
NOTE Further requirement regarding the additional information requirement for sensors and the ECF can be found in 4.3.2.3
and 4.4.2.5 of this standard.
4.2.2 Electrical requirements
4.2.2.1 Rated voltages
The characteristics of the voltage systems to which the EMF can be connected are specified in
EN 50163.
The rated primary voltage of the EMF (U ) shall be equal to the nominal voltage of the traction
n,EMF
supply system as detailed in EN 50163 and listed in Table 1.

Table 1 – Nominal traction supply system voltages
Nominal voltages
U System
n
V
25 000 50 Hz a.c.
15 000 16,7 Hz a.c.
3 000 d.c.
1 500 d.c.
750 d.c.
600 d.c.
If the EMF is designed to be used on more than one traction supply system it shall have a rated
primary voltage assigned for each traction supply system.
4.2.2.2 Rated current
The standard values of rated primary current of the EMF (I ) are:
n,EMF
10 A – 12,5 A – 15 A – 20 A – 25 A – 30 A – 40 A – 50 A – 60 A – 75 A , and their decimal multiples.
NOTE For example, decimal multiples of 10 A are 100 A, 1 000 A, 10 000 A.
The rated primary current (I ) of the EMF shall be between 80 % and 120 % of the rated traction
n,EMF
unit current.
If an EMF is designed to be used on more than one traction supply system it may have more than one
value of rated primary current assigned.
4.2.2.3 Rated frequency (f )
n
The rated frequency of the EMF shall be equal to the frequency of the traction supply system for which
it is designed to operate, selected from Table 1.
If an EMF is designed to be used on more than one traction supply system it may have more than one
value of rated frequency.
4.2.3 Accuracy requirements
4.2.3.1 General
The accuracy of the EMF is determined by the accuracy of the functions included within the EMF.
For any device which includes one or more functions of the EMF, any interface constraint (e.g. cable
type, maximum / minimum burden etc.), which is necessary to ensure accuracy is assured, shall be
clearly stated.
The following sub-clauses detail the requirements and procedure for determination of the accuracy of
the complete EMF.
4.2.3.2 Limits of error for the EMF
The percentage error for the complete EMF shall be determined in accordance with the following
formula:
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2 2 2
ε = (ε ) +(ε ) +(ε )
EMF VMF CMF ECF
where
is the calculated maximum percentage error of the EMF;
ε
EMF
is the maximum percentage (ratio) error allowed in accordance with the selected
ε
VMF
accuracy class for the VMF under the reference conditions;
is the maximum percentage (ratio) error allowed in accordance with the selected
ε
CMF
accuracy class for the CMF under the reference conditions;
is the maximum percentage error allowed in accordance with the selected
ε
ECF
accuracy class for the ECF under the reference conditions.

NOTE Informative Annex C provides further explanation about the method above.
For EMFs with more than one VMF, CMF or ECF, the formula above shall be used, but with errors for
the squared terms being determined in accordance with appropriate rules in Annex B.
4.2.3.3 Reference conditions
The following table details the reference conditions to be used for any part of the EMF and the
complete EMF.
Table 2 – Reference conditions
Influence quantity Reference value Permissible tolerances
a
Ambient temperature ± 2 °C
23 °C
Frequency Rated frequency ± 0,3 %
Wave-form  a.c. Sinusoidal voltages Distortion factor less than:
and currents
2 %
Wave-form  d.c. Pure d.c. voltages and currents Ripple less than 1 %
Auxiliary supply voltage Rated auxiliary supply voltage ± 5 %
Continuous magnetic induction Equal to Zero Induction value shall be less than
of external origin 0,05 mT
Electromagnetic RF fields, Equal to Zero < 1 V/m
30 kHz to 2 GHz
Conducted disturbances, Equal to zero -
induced by radio frequency
fields, 150 kHz to 80 MHz
Magnetic induction of external Magnetic induction equal Induction value shall be less than
origin at the reference to zero 0,05 mT
frequency
a
If the tests have to be made at a temperature other than the reference temperature, including permissible tolerances,
the results shall be corrected by applying the appropriate temperature coefficient of the equipment under test.

4.2.3.4 Limits of error due to variations in input quantities
When all functions of the EMF pass the accuracy tests as detailed in Clause 5, and the input
quantities and Power Factor are within the range given in Table 3, the percentage error when
calculated in accordance with 4.2.3.2 shall not exceed the limits given in Table 3. These limits shall
apply to the measurement of energy in each direction.
Table 3 – EMF percentage error limits
Input quantity range
Value of Value of
System PF = Power Percentage Percentage
a b
current voltage c
Factor or sin φ error limit, error limit,
type
active reactive energy
energy
a.c. 10 % I ≤ I ≤ U ≤ U ≤ U 0,85 ≤ PF 1,5
n min1 max2
120 % I or
n
sin φ = 1
3,0
Inductive
10 % I ≤ I ≤ U ≤ U ≤ U
d.c. 2,0 N/A
n min1 max2
N/A
120 % I
n
a
I is the rated primary current of the EMF.
n
b
The values of U and U are as specified in EN 50163:2004, Table 1.
min1 max2
c
The Power Factor is taken from EN 50388:2005, Table 1. The reactive energy cannot be measured accurately
for Power Factor near 1. Therefore the reactive energy is tested at sin φ = 1.

The accuracy classes of the VMF, CMF and ECF (which together form an EMF) shall be selected to
ensure that the EMF accuracy requirements detailed above are achieved.
4.2.3.5 Starting conditions
The EMF shall measure energy if the primary current is equal to or greater than 0,4 % I , and the
n
voltage is at U or above.
min2
If the primary current is zero, no energy shall be added to the energy registers.
4.2.4 Traction supply system change
When there is a changeover between traction supply systems the EMF shall ensure that all
consumption is measured.
4.2.5 Re-verification
The supplier shall provide recommendations to the purchaser regarding any re-verification activities
(testing and surveillance) that are considered necessary to ensure that the metrological performance
of the functions making up the EMF can be expected to remain within the specified accuracies during
the intended design life of the device containing these functions.
The recommendations shall be accompanied by supporting evidence based on technical justification
to explain why the ongoing metrological performance can be expected to remain within the accuracy
limits for the duration of the design life. The supporting evidence shall also indicate which aspects of
the devices (making up the EMF) are relevant to ensure the ongoing metrological performance

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perspective. The supplier shall clearly identify all aspects which require planned intervention (i.e. re-
verification testing a
...