GB/T 18656-2002 in English

《GB/T 18656-2002工业系统、装置与设备以及工业产品 系统内端子的标识》由TC27（全国电气信息结构、文件编制和图形符号标准化技术委员会）归口，主管部门为国家标准化管理委员会。
本标准提供了系统内项目（物体）端子代号的编制规则。本标准所制定的原则主要供电工及相关领域使用，但它们又具有通用性，适用于一切技术领域。它们可用于各个不同应用技术的系统，或兼有几种应用技术的系统。

1 Scope

This standard provides rules for the designation of terminals of objects within a system.

The principles laid down are primarily intended for use in the electrotechnical and related areas, but are general and applicable to all technical areas. They can be used for systems based on different technologies or for systems combining several technologies.

2 Normative References

The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below.

GB/T 4026-1992 Dentification of Electric Equipment Terminals and of Terminations of Certain Designated Conductors, Including General Rules for an Alphanumeric System (eqv IEC 60445:1988)
GB/T 6988.1-1997 Preparation of Documents Used in Electrotechnology — Part 1: General Requirements (idt IEC 61082-1:1991)
GB/T 6988.2-1997 Preparation of Documents Used in Electrotechnology — Part 2: Function-oriented Diagrams (idt IEC 61082-2:1993)
GB/T 6988.3-1997 Preparation of Documents Used in Electrotechnology — Part 3: Connection Diagrams, Tables and Lists (idt IEC 61082-3:1993)
GB/T 13534-1992 Codes for Designation of Colours for Electricity (eqv IEC 60757:1983)
IEC 61346-1:1996 Industrial Systems, Installations and Equipment and Industrial Products — Structuring Principles and Reference Designations — Part 1: Basic Rules

3 Definitions

For the purposes of this standard, the following definitions apply:

3.1 object
entity treated in the process of design, engineering, realization, operation, maintenance and demolition
Notes:
1 The entity may refer to an abstract or physical object or to a set of information associated with it.
2 Depending on purpose an object may be viewed in different ways, called aspects.

Foreword II
1 Scope
2 Normative References
3 Definitions
4 Identification of Terminals
Annex A (Informative) Classification of Terminals
Annex B (Informative) Examples
Annex C (Informative) Bibliography