Standard No.:	GB/T 1094.4-2005
Chinese Name:	电力变压器 第4部分：电力变压器和电抗器的雷电冲击和操作冲击试验导则
English Name:	Power transformers—Part 4:Guide to the lightning impulse and switching impulse testing—Power transformers and reactors
Professional Classification:	K41 Transformer
Professional Classification:	GB National Standard
ICS Classification:	29.180
Issued by:
Issued on:	2005-08-26
Implemented on:	2006-04-01
Status:	VALID
Replace:	GB/T7449-1987 Guide to the lightning impulse and switching impulse testing of power transformers and reactors
Language:	English
File Format:	PDF
Word Count:
Price(USD):	please email coc@codeofchina.com for quotation
Delivery:	via email in 1-3 business day

1 Scope

This Part gives guidance and explanatory comments on the existing procedures for lightning and switching impulse testing of power transformers to supplement the requirements of GB 1094.3. It is also generally applicable to the testing of reactors (see GB/T 10229), modifications to power transformer procedures being indicated where required.
This Part gives the information on waveshapes, test circuits including test connections, earthing practices, failure detection methods, test procedures, measuring techniques and interpretation of results.
Where applicable, the test techniques specified in this Part are as recommended in GB/T 16927.1 and GB/T 16927.2.

2 Normative References

The following normative documents contain provisions which, through reference in this text, constitute provisions of this Part of GB 1094. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, 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. For undated references, the latest edition of the normative documents referred to applies.
GB 1094.3 Power Transformers — Part 3: Insulation Levels, Dielectric Tests and External Clearances in Air (GB 1094.3-2003, IEC 60076-3:2000, MOD)
GB/T 10229 Reactors (GB/T 10229-1988, eqv IEC 60289:1987)
GB/T 16896.1 Digital Recorders for Measurements in High-voltage Impulse Tests C Part 1: Requirements for Digital Recorders (GB/T 16896.1-1997, eqv IEC 61083-1:1991)
GB/T 16927.1 High Voltage Test Techniques — Part 1: General Test Requirements (GB/T 16896.1-1997, eqv IEC 61083-1:1991)
GB/T 16927.2 High Voltage Test Techniques — Part 2: Measuring Systems (GB/T 16927.1-1997, eqv IEC 60060-1:1989)
IEC 61083-2 Digital Recorders for Measurements in High-voltage Impulse Tests — Part 2: Evaluation of Software Used for the Determination of the Parameters of Impulse Waveforms