GB Standards
Chinese national standards (Guobiao) for transformers including GB 1094, equivalent to IEC 60076 with local adaptations.
GB (Guobiao) standards are China's national standards. For transformers, GB 1094 is primary, closely based on IEC 60076. Key standards: GB 1094.1-5, GB/T 6451 (distribution transformer parameters), GB/T 1094.11 (dry-type).
Differences: Chinese voltage levels (10/35/110/220/500 kV), CCC references, Chinese ambient conditions. Export equipment may need both GB and destination standards.
QDTB designs to GB for domestic and IEC or IEEE for export. Our standards comparison guide covers differences.
Related Products
Related Terms
IEC 60076
The IEC standard series defining requirements for power transformers, the global reference standard.
CCC Certification
China Compulsory Certification (3C mark) required for electrical equipment sold in the Chinese domestic market.
IEEE C57
The IEEE standard series for transformers, the primary reference for the North American market.
More Terms Starting with “G”
Generator Step-Up Transformer (GSU)
A large power transformer stepping up generator voltage (11-25 kV) to transmission levels for grid connection.
Grounding Transformer
A transformer providing a neutral point for grounding in ungrounded or delta-connected systems.
Gas-Insulated Transformer
A transformer using SF6 or alternative gases as insulation instead of oil for fire safety and compact design.
More in “Standards & Certifications”
ANSI C57
The American National Standards Institute standard series covering power transformer requirements for the North American market.
CCC Certification
China Compulsory Certification (3C mark) required for electrical equipment sold in the Chinese domestic market.
CE Certification
Conformite Europeenne marking required for electrical equipment in the European Economic Area.
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