GB/T 28428-2012 27.5 kV and 2×27.5 kV AC metal-enclosed switchgear and controlgear for electrification railway

GB/T 311.2-2002 Insulation co-ordination—Part 2:Application guide for insulation co-ordination for high voltage transmission and distribution equipment GB/T 1408.1-2006 Electrical strength of insulating materials—Test methods—Part 1:Tests at power frequencies GB 1985-2004 High-voltage alternating-current disconnectors and earthing switches GB/T 2900.1-2008 Electrotechnical terminology—Fundamental terms GB/T 2900.20-1994 Electrotechnical terminology—High-voltage switchgear GB/T 3906-2006 Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6 kV and up to and including 40.5 kV GB/T 4208-2008 Degrees of protection provided by enclosure(IP code) GB/T 4728.1-2005 Graphical symbols for electrical diagrams—Part 1:General information GB/T 11021-2007 Electrical insulation—Thermal classification GB/T 11022-2011 Common specifications for high-voltage switchgear and controlgear standards GB/T 12022-2006 Sulphur hexafluoride for industrial use GB/T 16927.1-2011 High-voltage test techniques—Part 1:General definitions and test requirements GB/T 16935.1-2008 Insulation coordination for equipment within low-voltage systems—Part 1:Principles,requirements and tests GB/T 17627.1-1998 High-voltage test techniques for low-voltage equipment—Part 1:Definitions,test and procedure requirements IEC 60073:2002 IEC 62271-1:2007