Standard No.:	JB/T 8972-2011
English Name:	Specification of series YA， YA-W and YA-WF1 increased-safety three-phase asynchronous motor（frame size 315 to 450）
Chinese Name:	YA、YA-W、YA-WF1系列增安型三相异步电动机（机座号315～450）技术条件
Chinese Classification:	K25    Explosion-proof electric machine
Professional Classification:	JB    Professional Standard - Machinery
ICS Classification:	29.260.20 29.260.20    Electrical apparatus for explosive atmospheres 29.260.20
Issued by:	MIIT
Issued on:	2011-12-20
Implemented on:	2012-4-1
Status:	valid
Superseding:	JB/T 8972-1999
Language:	English
File Format:	PDF
Word Count:	6000 words
Price(USD):	150.0
Delivery:	via email in 1 business day

1 Scope This standard specifies types, basic parameters and dimensions, technical requirements, test methods and inspection rules and requirements for marking, packaging and warranty period of series YA, YA-W and YA-WF1 increased-safety three-phase asynchronous motor. This standard is applicable to series YA, YA-W and YA-WF1 increased-safety three-phase asynchronous motor (hereinafter referred to as motor) and used by motors derived from this series for reference.

Contents Foreword I 1 Scope 2 Normative References 3 Types, Basic Parameters and Dimensions 4 Technical Requirements 5 Test Methods 6 Inspection Rules 7 Marking, Packaging and Warranty Period Appendix A (Normative) Calculation of tE of Increased-safety Three-phase Asynchronous Motor