Draft61850-7-3©1EC:2002 -5-57WG10-12(61850-7-3)R7.10/DraftFD1S INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMUNICATION NETWORKS AND SYSTEMS IN SUBSTATIONS Part 7-3:Basic communication structure for substations and feeder equipment-Common data classes FOREWORD 1)The IEC (International Electrotechnical Commission)is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees).The object of the 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,the IEC publishes International Standards.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.The 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 the 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 National Committees. 3)The documents produced have the form of recommendations for international use and are published in the form of standards,technical reports or guides and they are accepted by the National Committees in that sense. 4)In order to promote international unification,IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards.Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. 5)The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards. 6)Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights.The IEC shall not be held responsible for identifying any or all such patent rights. Recipients of this document are invited to submit,with their comments,notification of any relevant patent rights of which they are aware and to provide supporting documentation. This FDIS of the International Standard IEC 61850-7-3 has been prepared by the working groups 10,11 and 12 of IEC technical committee 57. This document is part of the standard series IEC 61850,a set of specifications for communication networks and systems in substations.At time of publication of this part,the following parts where intended to be part of IEC 61850: IEC 61850-1:Communication networks and systems in substations -Part 1:Introduction and overview 1EC61850-2: Communication networks and systems in substations-Part 2:Glossary IEC 61850-3:Communication networks and systems in substations -Part 3:General requirements 1EC61850-4: Communication networks and systems in substations-Part 4:System and project management /EC61850-5: Communication networks and systems in substations Part 5: Communication requirements for functions and device models 1EC61850-6: Communication networks and systems in substations -Part 6:Substation automation system configuration languageDraft 61850-7-3  IEC:2002 – 5 – 57/WG10-12(61850-7-3)R7.10/DraftFDIS INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________ COMMUNICATION NETWORKS AND SYSTEMS IN SUBSTATIONS Part 7-3: Basic communication structure for substations and feeder equipment – Common data classes FOREWORD 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees. 3) The documents produced have the form of recommendations for international use and are published in the form of standards, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards. 6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights. Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to provide supporting documentation. This FDIS of the International Standard IEC 61850-7-3 has been prepared by the working groups 10, 11 and 12 of IEC technical committee 57. This document is part of the standard series IEC 61850, a set of specifications for communication networks and systems in substations. At time of publication of this part, the following parts where intended to be part of IEC 61850: IEC 61850-1: Communication networks and systems in substations – Part 1: Introduction and overview IEC 61850-2: Communication networks and systems in substations – Part 2: Glossary IEC 61850-3: Communication networks and systems in substations – Part 3: General requirements IEC 61850-4: Communication networks and systems in substations – Part 4: System and project management IEC 61850-5: Communication networks and systems in substations – Part 5: Communication requirements for functions and device models IEC 61850-6: Communication networks and systems in substations – Part 6: Substation automation system configuration language