Standard No.:	JB/T 7608-2006
English Name:	Methods and limits for testing the dissipation factor tan δon winding of high voltage AC machine
Chinese Name:	测量高压交流电机线圈介质损耗角正切试验方法及限值
Chinese Classification:	J20    Hydraulic and pneumatic device
Professional Classification:	JB    Professional Standard - Machinery
ICS Classification:	29.160.01 29.160.01    Rotating machinery in general 29.160.01
Source Content Issued by:	NDRC
Issued on:	2006-09-14
Implemented on:	2007-3-1
Status:	valid
Superseded by:	JB/T 7608-2025 Test method and limits of dielectric dissipation factor of coil for HV and AC electric machine
Superseding:	JB/T 7608-1994
Target Language:	English
File Format:	PDF
Word Count:	2000 words
Translation Price(USD):	40.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the test method and limited value of the loss factor of single stator coil (bar) for the rotating motor. This standard is applicable to Grade B and F insulation loss measuring test for the stator coil (bar) of the synchronous generator, synchronous compensator and AC electric motor with rated voltage of 6kV or above. This standard is not applicable to the unsolidified coil (bar). 2 Normative References The following standard contains provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrigenda), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document applies.

Foreword I 1 Scope 1 2 Normative References 1 3 Test 1 4 Limited Value of Loss Factor (tanδ) and Its Increment (Δtanδ) 5 Appendix A (Normative) Measuring Electrode and Shielding Electrode 6 Appendix B (Normative) Hot State Loss Factor Measuring Test 7