Standard No.:	GB 1971-2006
English Name:	Rotating Electrical Machines - Terminal Markings and Direction of Rotation
Chinese Name:	旋转电机 线端标志与旋转方向
Chinese Classification:	K20    Electric rotating machinery in general
Professional Classification:	GB    National Standard
ICS Classification:	29.160.01 29.160.01    Rotating machinery in general 29.160.01
Issued by:	AQSIQ; SAC
Issued on:	2006-04-30
Implemented on:	2007-1-1
Status:	superseded
Superseded by:	GB/T 1971-2021 Rotating electrical machines—Terminal markings and direction of rotation
Superseded on:	2022-5-1
Superseding:	GB 1971-1980 Terminal markings and direction of rotation of rotating electrical machines
Language:	English
File Format:	PDF
Word Count:	5500 words
Price(USD):	80.0
Delivery:	via email in 1 business day

This standard is applicable to a.c. and d.c. machines and specifies: a) Rules for the identification of winding connection points; b) Marking of winding terminals; c) Direction of rotation; d) Relationship between terminal markings and direction of rotation; e) Terminal marking of auxiliary devices; f) Connection diagrams of machines for common applications. Turbine-type synchronous machines are excluded from this standard.

Foreword I 1 Scope 2 Normative References 3 Terms and Definitions 4 Symbols 4.1 General 4.2 DC and single-phase commutator machines 4.3 AC machines without commutator 4.4 Auxiliary devices 5 Direction of Rotation 6 Rules for Terminal Markings 6.1 General 6.2 Suffixes 6.3 Prefixes 6.4 Winding identification for categories of machines 6.5 Synchronous machines 6.6 DC machines 6.7 Relation between terminal markings and direction of rotation 6.8 Terminal marking figures 7 Auxiliary Terminal Marking Rules 7.1 General 7.2 Marking Annex A (Normative) Connection Diagrams for Common Applications A.1 General A.2 Three-phase machines A.2.1 Single-speed stator windings A.2.2 Multi-speed stator windings A.3 Single-phase asynchronous machines A.4 DC machines