GB/T 20838-2007Specification and technical requirements of oil-immersed convertor transformers for HVDC applications (English PDF)

1 Scope

This standard specifies the performance parameters, technical requirements, test items, marking, packing, transport and storage of ±500 kV or below oil-immersed convertor transformers for DC applications (hereinafter referred to as transformers) and performance parameters examples for some specific products are provided in Appendix A.

This standard is applicable to ±500 kV or below single-phase oil-immersed convertor transformers for DC applications.

2 Normative References

The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments (excluding any correction of) to, 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 editions of these documents are applicable. For undated references, the latest editions of the normative documents referred to apply.

GB 1094.1 "Power Transformers--Part 1: General" (GB 1094.1-1996, eqv IEC 60076-1: 1993)

GB 1094.2 "Power Transformers--Part 2: Temperature Rise" (GB 1094.2-1996, eqv IEC 60076-2: 1993)

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 1094.5 "Power Transformers--Part 5: Ability to Withstand Short Circuit" (GB 1094.5-2003, IEC 60076-5: 2000, MOD)

GB/T 18494.2-2007 "Convertor Transformers--Part 2: Transformers for HVDC Applications" (IEC 61378-2: 2001, MOD)

IEC 60296: 2003 "Fluids for electrotechnical Applications--Unused Mineral Insulating Oils for Transformers and Switchgear" […]