EN 61850-7-4:2010

SLOVENSKI STANDARD
01-september-2010
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Communication networks and systems for power utility automation - Part 7-4: Basic
communication structure - Compatible logical node classes and data object classes (IEC
61850-7-4:2010)
Kommunikationsnetze und -systeme für die Automatisierung in der elektrischen
Energieversorgung - Teil 7-4: Grundlegende Kommunikationsstruktur - Kompatible
Logikknotenund Datenklassen (IEC 61850-7-4:2010)
Réseaux et systèmes de communication pour l’automatisation des systèmes électriques
- Partie 7-4 : Structure de communication de base - Classes de noeud logique et classes
de donnée objet compatibles (CEI 61850-7-4:2010)
Ta slovenski standard je istoveten z: EN 61850-7-4:2010
ICS:
29.240.30 Krmilna oprema za Control equipment for electric
elektroenergetske sisteme power systems
33.200 Daljinsko krmiljenje, daljinske Telecontrol. Telemetering
meritve (telemetrija)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61850-7-4
NORME EUROPÉENNE
June 2010
EUROPÄISCHE NORM
ICS 33.200 Supersedes EN 61850-7-4:2003

English version
Communication networks and systems for power utility automation -
Part 7-4: Basic communication structure -
Compatible logical node classes and data object classes
(IEC 61850-7-4:2010)
Réseaux et systèmes de communication Kommunikationsnetze und -systeme
pour l’automatisation des systèmes für die Automatisierung in der elektrischen
électriques - Energieversorgung -
Partie 7-4 : Structure de communication Teil 7-4: Grundlegende
de base - Kommunikationsstruktur -
Classes de nœud logique et classes Kompatible Logikknoten-
de donnée objet compatibles und Datenklassen
(CEI 61850-7-4:2010) (IEC 61850-7-4:2010)

This European Standard was approved by CENELEC on 2010-06-01. 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, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland 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

© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61850-7-4:2010 E
Foreword
The text of document 57/1045/FDIS, future edition 2 of IEC 61850-7-4, prepared by IEC TC 57, Power
systems management and associated information exchange, was submitted to the IEC-CENELEC
parallel vote and was approved by CENELEC as EN 61850-7-4 on 2010-06-01.
This European Standard supersedes EN 61850-7-4:2003.
Future standards in this series will carry the new general title as cited above. Titles of existing standards
in this series will be updated at the time of the next edition.
The major technical changes with regard to EN 61850-7-4:2003 are as follows:
− corrections and clarifications according to information letter "IEC 61850-technical issues by the
IEC TC 57” (see document 57/963/INF, 2008-07-18);
− extensions for new logical nodes for the power quality domain;
− extensions for the model for statistical and historical statistical data;
− extensions regarding IEC 61850-90-1 (substation-substation communication);
− extensions for new logical nodes for monitoring functions according to EN 62271;
− new logical nodes from EN 61850-7-410 and EN 61850-7-420 of general interest.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2011-03-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2013-06-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61850-7-4:2010 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60870-5-101 NOTE  Harmonized as EN 60870-5-101.
IEC 60870-5-103 NOTE  Harmonized as EN 60870-5-103.
IEC 61000-4-30 NOTE  Harmonized as EN 61000-4-30.
IEC 61850-6 NOTE  Harmonized as EN 61850-6.
IEC 61850-7-410:2007 NOTE  Harmonized as EN 61850-7-410:2007 (not modified).
IEC 61850-7-420 NOTE  Harmonized as EN 61850-7-420.
IEC 61850-8 series NOTE  Harmonized in EN 61850-8 series (not modified).

- 3 - EN 61850-7-4:2010
IEC 61850-9 series NOTE  Harmonized in EN 61850-9 series (not modified).
IEC 61850-10 NOTE  Harmonized as EN 61850-10.
__________
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  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 60270 2000 High-voltage test techniques - Partial EN 60270 2001
discharge measurements
IEC 61000-4-7 2002 Electromagnetic compatibility (EMC) - EN 61000-4-7 2002
Part 4-7: Testing and measurement
techniques - General guide on harmonics and
interharmonics measurements and
instrumentation, for power supply systems
and equipment connected thereto

IEC 61000-4-15 - Electromagnetic compatibility (EMC) - EN 61000-4-15 -
Part 4-15: Testing and measurement
techniques - Flickermeter - Functional and
design specifications
IEC/TS 61850-2 - Communication networks and systems in - -
substations -
Part 2: Glossary
IEC 61850-5 - Communication networks and systems in EN 61850-5 -
substations -
Part 5: Communication requirements for
functions and device models
1) 2)
IEC 61850-7-1 200X Communication networks and systems for EN 61850-7-1 200X
power utility automation -
Part 7-1: Basic communication structure -
Principles and models
1) 2)
IEC 61850-7-2 200X Communication networks and systems for EN 61850-7-2 200X
power utility automation -
Part 7-2: Basic information and
communication structure - Abstract
communication service interface (ACSI)

1) 2)
IEC 61850-7-3 200X Communication networks and systems for EN 61850-7-3 200X
power utility automation -
Part 7-3: Basic communication structure -
Common data classes
1)
To be published.
2)
At draft stage.
- 5 - EN 61850-7-4:2010
Publication Year Title EN/HD Year

IEC 61850-9-2 - Communication networks and systems for EN 61850-9-2 -
power utility automation -
Part 9-2: Specific Communication Service
Mapping (SCSM) - Sampled values over
ISO/IEC 8802-3
IEEE C37.111 1999 IEEE Standard for Common Format for - -
Transient Data Exchange (COMTRADE) for
Power Systems
IEEE 519 1992 IEEE Recommended Practises and - -
Requirements for Harmonic Control in
Electrical Power Systems
IEEE C37.2 1996 Electrical Power System Device Function - -
Numbers and Contact Designations

IEEE 1459 2000 IEEE Trial Use Standard Definitions for the - -
Measurement of Electric Power Quantities
Under Sinusoidal, Nonsinusoidal, Balanced
or Unbalanced Conditions
IEEE 1588 - IEEE Standard for a Precision Clock - -
Synchronization Protocol for Networked
Measurement and Control Systems

IEC 61850-7-4 ®
Edition 2.0 2010-03
INTERNATIONAL
STANDARD
colour
inside
Communication networks and systems for power utility automation –
Part 7-4: Basic communication structure – Compatible logical node classes and
data object classes
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
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ICS 33.200 ISBN 2-8318-1082-0
– 2 – 61850-7-4 © IEC:2010(E)
CONTENTS
FOREWORD.8
INTRODUCTION.10
Scope.11
2 Normative references.12
3 Terms and definitions .13
4 Abbreviated terms.13
5 Logical node classes.19
5.1 Logical node groups .19
5.2 Interpretation of logical node tables .20
5.3 System logical nodes LN group: L .21
5.3.1 LN relationships.21
5.3.2 LN: Physical device information  Name: LPHD.22
5.3.3 LN: common logical node  Name: Common LN.22
5.3.4 LN: Logical node zero  Name: LLN0 .24
5.3.5 LN: Physical communication channel supervision  Name: LCCH .24
5.3.6 LN: GOOSE subscription  Name: LGOS .25
5.3.7 LN: Sampled value subscription  Name: LSVS.25
5.3.8 LN: Time management  Name: LTIM.26
5.3.9 LN: Time master supervision  Name: LTMS.26
5.3.10 LN: Service tracking  Name: LTRK .27
5.4 Logical nodes for automatic control  LN Group: A.27
5.4.1 Modelling remarks .27
5.4.2 LN: Neutral current regulator  Name: ANCR .27
5.4.3 LN: Reactive power control  Name: ARCO.29
5.4.4 LN: Resistor control  Name: ARIS .29
5.4.5 LN: Automatic tap changer controller  Name: ATCC .30
5.4.6 LN: Voltage control  Name: AVCO.31
5.5 Logical nodes for control  LN Group: C .32
5.5.1 Modelling remarks .32
5.5.2 LN: Alarm handling  Name: CALH .32
5.5.3 LN: Cooling group control  Name: CCGR.32
5.5.4 LN: Interlocking  Name: CILO.33
5.5.5 LN: Point-on-wave switching  Name: CPOW.33
5.5.6 LN: Switch controller  Name: CSWI.34
5.5.7 LN: Synchronizer controller  Name: CSYN.35
5.6 Logical nodes for functional blocks  LN group F .36
5.6.1 Modelling remarks .36
5.6.2 LN: Counter  Name: FCNT .36
5.6.3 LN: Curve shape description  Name: FCSD .37
5.6.4 LN: Generic filter  Name: FFIL .37
5.6.5 LN: Control function output limitation  Name: FLIM .38
5.6.6 LN: PID regulator  Name: FPID .38
5.6.7 LN: Ramp function  Name: FRMP.39
5.6.8 LN: Set-point control function  Name: FSPT .39
5.6.9 LN: Action at over threshold  Name: FXOT .40
5.6.10 LN: Action at under threshold  Name: FXUT .40

61850-7-4 © IEC:2010(E) – 3 –
5.7 Logical nodes for generic references  LN Group: G .41
5.7.1 Modelling remarks .41
5.7.2 LN: Generic automatic process control  Name: GAPC .41
5.7.3 LN: Generic process I/O  Name: GGIO.42
5.7.4 LN: Generic log  Name: GLOG.42
5.7.5 LN: Generic security application  Name: GSAL.43
5.8 Logical nodes for interfacing and archiving  LN Group: I.43
5.8.1 Modelling remarks .43
5.8.2 LN: Archiving  Name: IARC .43
5.8.3 LN: Human machine interface  Name: IHMI.44
5.8.4 LN: Safety alarm function  Name: ISAF .44
5.8.5 LN: Telecontrol interface  Name: ITCI .45
5.8.6 LN: Telemonitoring interface  Name: ITMI .45
5.8.7 LN: Teleprotection communication interfaces  Name: ITPC .45
5.9 Logical nodes for mechanical and non-electric primary equipment  LN group
K .46
5.9.1 Modelling remarks .46
5.9.2 LN: Fan  Name: KFAN .47
5.9.3 LN: Filter  Name: KFIL .47
5.9.4 LN: Pump  Name: KPMP.48
5.9.5 LN: Tank  Name: KTNK.48
5.9.6 LN: Valve control  Name: KVLV.49
5.10 Logical nodes for metering and measurement  LN Group: M.50
5.10.1 Modelling remarks .50
5.10.2 LN: Environmental information  Name: MENV .50
5.10.3 LN: Flicker measurement name  Name: MFLK .51
5.10.4 LN: Harmonics or interharmonics  Name: MHAI .52
5.10.5 LN: Non-phase-related harmonics or interharmonics  Name: MHAN .53
5.10.6 LN: Hydrological information  Name: MHYD .55
5.10.7 LN: DC measurement  Name: MMDC.55
5.10.8 LN: Meteorological information  Name: MMET.55
5.10.9 LN: Metering  Name: MMTN.56
5.10.10 LN: Metering  Name: MMTR.57
5.10.11 LN: Non-phase-related measurement  Name: MMXN .57
5.10.12 LN: Measurement  Name: MMXU.57
5.10.13 LN: Sequence and imbalance  Name: MSQI.59
5.10.14 LN: Metering statistics  Name: MSTA.60
5.11 Logical nodes for protection functions  LN Group: P .60
5.11.1 Modelling remarks .60
5.11.2 LN: Differential  Name: PDIF.61
5.11.3 LN: Direction comparison  Name: PDIR .62
5.11.4 LN: Distance  Name: PDIS.63
5.11.5 LN: Directional overpower  Name: PDOP .63
5.11.6 LN: Directional underpower  Name: PDUP .64
5.11.7 LN: Rate of change of frequency  Name: PFRC.64
5.11.8 LN: Harmonic restraint  Name: PHAR .65
5.11.9 LN: Ground detector  Name: PHIZ .65
5.11.10 LN: Instantaneous overcurrent  Name: PIOC.66
5.11.11 LN: Motor restart inhibition  Name: PMRI .66
5.11.12 LN: Motor starting time supervision  Name: PMSS .67

– 4 – 61850-7-4 © IEC:2010(E)
5.11.13 LN: Over power factor  Name: POPF .67
5.11.14 LN: Phase angle measuring  Name: PPAM .67
5.11.15 LN: Rotor protection  Name: PRTR .68
5.11.16 LN: Protection scheme  Name: PSCH .68
5.11.17 LN: Sensitive directional earthfault  Name: PSDE.69
5.11.18 LN: Transient earth fault  Name: PTEF .70
5.11.19 LN: Thyristor protection  Name: PTHF .70
5.11.20 LN: Time overcurrent  Name: PTOC .70
5.11.21 LN: Overfrequency  Name: PTOF .71
5.11.22 LN: Overvoltage  Name: PTOV .72
5.11.23 LN: Protection trip conditioning  Name: PTRC .72
5.11.24 LN: Thermal overload  Name: PTTR .73
5.11.25 LN: Undercurrent  Name: PTUC.73
5.11.26 LN: Underfrequency  Name: PTUF.74
5.11.27 LN: Undervoltage  Name: PTUV.74
5.11.28 LN: Underpower factor  Name: PUPF.75
5.11.29 LN: Voltage controlled time overcurrent  Name: PVOC .75
5.11.30 LN: Volts per Hz  Name: PVPH .76
5.11.31 LN: Zero speed or underspeed  Name: PZSU.77
5.12 Logical nodes for power quality events  LN Group: Q .77
5.12.1 Modelling remarks .77
5.12.2 LN: Frequency variation  Name: QFVR.77
5.12.3 LN: Current transient  Name: QITR .78
5.12.4 LN: Current unbalance variation  Name: QIUB.78
5.12.5 LN: Voltage transient  Name: QVTR .79
5.12.6 LN: Voltage unbalance variation  Name: QVUB .79
5.12.7 LN: Voltage variation  Name: QVVR .80
5.13 Logical nodes for protection related functions  LN Group: R .80
5.13.1 Modelling remarks .80
5.13.2 LN: Disturbance recorder channel analogue  Name: RADR .81
5.13.3 LN: Disturbance recorder channel binary  Name: RBDR .81
5.13.4 LN: Breaker failure  Name: RBRF .82
5.13.5 LN: Directional element  Name: RDIR .82
5.13.6 LN: Disturbance recorder function  Name: RDRE .83
5.13.7 LN: Disturbance record handling  Name: RDRS .84
5.13.8 LN: Fault locator  Name: RFLO.84
5.13.9 LN: Differential measurements Name: RMXU.84
5.13.10 LN: Power swing detection/blocking  Name: RPSB.85
5.13.11 LN: Autoreclosing  Name: RREC.86
5.13.12 LN: Synchronism-check  Name: RSYN.86
5.14 Logical nodes for supervision and monitoring  LN Group: S .87
5.14.1 Modelling remarks .87
5.14.2 LN: Monitoring and diagnostics for arcs  Name: SARC .88
5.14.3 LN: Circuit breaker supervision  Name: SCBR.88
5.14.4 LN: Insulation medium supervision (gas)  Name: SIMG .89
5.14.5 LN: Insulation medium supervision (liquid)  Name: SIML .90
5.14.6 LN: Tap changer supervision  Name: SLTC.91
5.14.7 LN: Supervision of operating mechanism  Name: SOPM .91
5.14.8 LN: Monitoring and diagnostics for partial discharges  Name: SPDC.92

61850-7-4 © IEC:2010(E) – 5 –
5.14.9 LN: Power transformer supervision  Name: SPTR .93
5.14.10 LN: Circuit switch supervision  Name: SSWI .93
5.14.11 LN: Temperature supervision  Name: STMP.94
5.14.12 LN: Vibration supervision  Name: SVBR.95
5.15 Logical nodes for instrument transformers and sensors  LN Group: T .96
5.15.1 Modelling remarks .96
5.15.2 LN: Angle  Name: TANG.96
5.15.3 LN: Axial displacement  Name: TAXD .96
5.15.4 LN: Current transformer  Name: TCTR.97
5.15.5 LN: Distance  Name: TDST.97
5.15.6 LN: Liquid flow  Name: TFLW .98
5.15.7 LN: Frequency  Name: TFRQ.98
5.15.8 LN: Generic sensor  Name: TGSN .99
5.15.9 LN: Humidity  Name: THUM.99
5.15.10 LN: Media level  Name: TLVL . 100
5.15.11 LN: Magnetic field  Name: TMGF . 100
5.15.12 LN: Movement sensor  Name: TMVM. 100
5.15.13 LN: Position indicator  Name: TPOS . 101
5.15.14 LN: Pressure sensor  Name: TPRS. 101
5.15.15 LN: Rotation transmitter  Name: TRTN. 102
5.15.16 LN: Sound pressure sensor  Name: TSND . 102
5.15.17 LN: Temperature sensor  Name: TTMP. 103
5.15.18 LN: Mechanical tension / stress  Name: TTNS . 103
5.15.19 LN: Vibration sensor  Name: TVBR . 104
5.15.20 LN: Voltage transformer  Name: TVTR. 104
5.15.21 LN: Water acidity  Name: TWPH. 105
5.16 Logical nodes for switchgear  LN Group: X.105
5.16.1 Modelling remarks .105
5.16.2 LN: Circuit breaker  Name: XCBR . 105
5.16.3 LN: Circuit switch  Name: XSWI . 106
5.17 Logical nodes for power transformers  LN Group: Y . 107
5.17.1 Modelling remarks .107
5.17.2 LN: Earth fault neutralizer (Petersen coil)  Name: YEFN . 107
5.17.3 LN: Tap changer  Name: YLTC . 107
5.17.4 LN: Power shunt  Name: YPSH . 108
5.17.5 LN: Power transformer  Name: YPTR . 108
5.18 Logical nodes for further power system equipment  LN Group: Z . 109
5.18.1 Modelling remarks .109
5.18.2 LN: Auxiliary network  Name: ZAXN . 109
5.18.3 LN: Battery  Name: ZBAT . 109
5.18.4 LN: Bushing  Name: ZBSH. 110
5.18.5 LN: Power cable  Name: ZCAB . 110
5.18.6 LN: Capacitor bank  Name: ZCAP. 111
5.18.7 LN: Converter  Name: ZCON . 111
5.18.8 LN: Generator  Name: ZGEN . 111
5.18.9 LN: Gas insulated line  Name: ZGIL .112
5.18.10 LN: Power overhead line  Name: ZLIN . 112
5.18.11 LN: Motor  Name: ZMOT. 113
5.18.12 LN: Reactor  Name: ZREA . 113

– 6 – 61850-7-4 © IEC:2010(E)
5.18.13 LN: Resistor  Name: ZRES . 114
5.18.14 LN: Rotating reactive component  Name: ZRRC. 114
5.18.15 LN: Surge arrestor  Name: ZSAR . 115
5.18.16 LN: Semi-conductor controlled rectifier  Name: ZSCR . 115
5.18.17 LN: Synchronous machine  Name: ZSMC. 115
5.18.18 LN: Thyristor controlled frequency converter  Name: ZTCF . 117
5.18.19 LN: Thyristor controlled reactive component  Name: ZTCR. 117
6 Data object name semantics . 117
Annex A (normative) Interpretation of mode and behaviour . 156
Annex B (normative) Local / Remote concept . 158
Annex C (informative) Deprecated logical node classes . 160
Annex D (informative) Relationship between this standard and IEC 61850-5 . 161
Annex E (informative) Algorithms used in logical nodes for automatic control. 162
Annex F (normative) Statistical calculation . 167
Annex G (normative) Functional relationship of data objects of autorecloser RREC. 172
Annex H (normative) SCL enumerations . 173
Bibliography . 179

Figure 1 – Overview of this standard .12
Figure 2 – LOGICAL NODE relationships.21
Figure E.1 – Example of curve based on an indexed gate position providing water flow. 162
Figure E.2 – Example of curve based on an indexed guide vane position (x axis) vs. net
head (y axis) giving an interpolated runner blade position (Z axis). 163
Figure E.3 – Example of a proportional-integral-derivate controller. 164
Figure E.4 – Example of a power stabilisation system. 165
Figure E.5 – Example of a ramp generator . 165
Figure E.6 – Example of an interface with a set-point algorithm . 166
Figure F.1 – Statistical calculation of a vector. 168
Figure F.2 – Examples of statistical calculations. 170
Figure G.1 – Diagram of autorecloser function. 172

Table 1 – List of logical node groups. 19
Table 2 – Interpretation of logical node tables. 20
Table 3 – Relation between IEC 61850-5 and IEC 61850-7-4 for automatic control LNs. 27
Table 4 – Relation between IEC 61850-5 and IEC 61850-7-4 for control LNs. 32
Table 5 – Conditional attributes in FPID. 39
Table 6 – Relation between IEC 61850-5 and IEC 61850-7-4 for metering and
measurement LNs . 50
Table 7 – Relation between IEC 61850-5 and IEC 61850-7-4 (this standard) for protection LNs 60
Table 8 – Relation between IEC 61850-5 and IEC 61850-7-4 for protection related LN . 80
Table 9 – Relation between IEC 61850-5 and IEC 61850-7-4 for supervision and
monitoring LNs.87
Table 10 – Description of data objects. 117
Table A.1 – Values of mode and behaviour. 156
Table A.2 – Definition of mode and behaviour.157

61850-7-4 © IEC:2010(E) – 7 –
Table B.1 – Relationship between Loc/Rem data objects and control authority . 159
Table D.1 – Relationship between IEC 61850-5 and this standard for some
miscellaneous LNs .161

– 8 – 61850-7-4 © IEC:2010(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
COMMUNICATION NETWORKS AND
SYSTEMS FOR POWER UTILITY AUTOMATION –

Part 7-4: Basic communication structure –
Compatible logical node classes and data object classes

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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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 61850-7-4 has been prepared by IEC technical committee 57:
Power systems management and associated information exchange.
This second edition cancels and replaces the first edition published in 2003. It constitutes a
technical revision.
Future standards in this series will carry the new general title as cited above. Titles of existing
standards in this series will be updated at the time of the next edition.
The major technical changes with regard to the previous edition are as follows:
• corrections and clarifications according to information letter "IEC 61850-technical issues by
the IEC TC 57” (see document 57/963/INF, 2008-07-18);
• extensions for new logical nodes for the power quality domain;

61850-7-4 © IEC:2010(E) – 9 –
• extensions for the model for statistical and historical statistical data;
• extensions regarding IEC 61850-90-1 (substation-substation communication);
• extensions for new logical nodes for monitoring functions according to IEC 62271;
• new logical nodes from IEC 61850-7-410 and IEC 61850-7-420 of general interest.
The text of this standard is based on the following documents:
FDIS Report on voting
57/1045/FDIS 57/1051/RVD
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The content of this part of IEC 61850 is based on existing or emerging standards and
applications. In particular the definitions are based upon:
• the specific data objects types defined in IEC 60870-5-101 and IEC 60870-5-103;
• the common class definitions from the Utility Communication Architecture 2.0: Generic
Object Models for Substation and Feeder Equipment (GOMSFE) (IEEE TR 1550);
• CIGRE Report 34-03, Communication requirements in terms of data flow within substations,
December 1996.
A list of all parts of the IEC 61850 series under the general title Communication networks and
systems in substations, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the
stability 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.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

– 10 – 61850-7-4 © IEC:2010(E)
INTRODUCTION
This part of IEC 61850 is part of a set of standards, the IEC 61850 series. IEC 61850 defines
communication networks and systems for power utility automation, and more specially the
communication architecture for subsystems such as substation automation systems. The sum
of all subsystems may result also in the description of the communication architecture for the
overall power system management. The defined architecture provided in specific parts of
IEC 61850-7-x gives both a power utility specific data model and a substation domain specific
data model with abstract definitions of data objects classes and services independently from
the specific protocol stacks, implementations, and operating systems. The mapping of these
abstract classes and services to communication stacks is outside the scope of IEC 61850-7-x
and may be found in IEC 61850-8-x and in IEC 61850-9-x.
IEC 61850-7-1 gives an overview of the basic communication architecture to be used for all
applications in the power system domain. IEC 61850-7-3 defines common attribute types and
common data classes related to all applications in the power system domain. The attributes of
the common data classes may be accessed using services defined in IEC 61850-7-2. These
common data classes are used in this part to define the compatible data object classes.
To reach interoperability, all data objects in the data model need a strong definition with regard
to syntax and semantics. The semantics of the data objects is mainly provided by names
assigned to common logical nodes defined in this part and the data objects they contain, as
defined in this basic part, and dedicated logical nodes defined in domain specific parts such as
for hydro power control systems. Interoperability is easiest if as much as possible of the data
objects are defined as mandatory. Because of different approaches and technical features,
some data objects, especially settings, were declared as optional in this edition of the standard.
There are also data objects which were declared as conditional, i.e. they will become
mandatory under some well-defined conditions. After some experience has been gained with
this standard, this decision may be reviewed in the next edition of this part.
It should be noted that data objects with full semantics are only one of the elements required to
achieve interoperability. The standardized access to the data objects is defined in compatible,
power utility and domain specific services (see IEC 61850-7-2). Since data objects and
services are hosted by devices (IED), a proper device model is also needed
...