MT/T 499-1995 Open-pit mine 35 kV and 66 kV mobile substation

GB 311.5 GB 763 GB 2706 JB 8 GB/T 191-2000 Packaging—Pictorial marking for handling of goods GB/T 191-2008 Packaging—Pictorial marking for handling of goods GB 311.1-1997 Insulation co-ordination for high voltage transmission and distribution equipment GB/T 311.1-2012 Insulation co-ordination—Part 1:Definitions,principles and rules 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 311.2-2013 Insulation co-ordination—Part 2:Application guide GB/T 311.3-2007 Insulation co-ordination—Part 3:Procedures for high-voltage direct current(HVDC) converter stations GB/T 311.3-2017 Insulation co-ordination—Part 3:Procedures for high-voltage direct current(HVDC) converter stations GB/T 311.4-2010 Insulation co-ordination—Part 4:Computational guide to insulation co-ordination and modeling of electrical networks GB/T 311.6-2005 Voltage measurement by means of standard air gaps GB/T 762-2002 Standard current ratings GB/T 2423.4-1993 Basic environmental testing procedures for electric and electronic products—Test Db:Damp heat, cyclic GB/T 2423.4-2008 Environmental testing for electric and electronic products—Part 2:Test method—Test Db:Damp heat,cyclic(12 h+12 h cycle) GB 3906-1991 A.C. metal-enclosed switchgear for rated voltages of 3～35kV 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 3906-2020 Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6 kV and up to and including 40.5 kV GB 4208-1993 Degrees of protection provided by enclosure (IP code) GB/T 4208-2008 Degrees of protection provided by enclosure(IP code) GB/T 4208-2017 Degrees of protection provided by enclosure(IP code) GB/T 5582-1993 External insulation pollution classes of high-voltage electric power equipments GB/T 9089.2-1988 Electrical installations for outdoor sites under heavy conditions General protection requirements GB/T 9089.2-2008 Electrical installations for outdoor sites under heavy conditions—Part 2:General protection requirements GB/T 9089.2-2023 Electrical installations for outdoor sites under heavy conditions—Part 2:General protection requirements GB/T 9089.3-1991 Electrical installations for outdoor sites under heavy conditions—General requirements for equipment and ancillaries GB/T 9089.3-2008 Electrical installations for outdoor sites under heavy conditions—Part 3:General requirements for equipment and ancillaries GB/T 9089.3-2023 Electrical installations for outdoor sites under heavy conditions—Part 3:General requirements for equipment and ancillaries GB/T 14048.1-2000 Low-voltage switchgear and controlgear—General rules GB 14048.1-2006 Low-voltage switchgear and controlgear—Part 1:General rules GB/T 14048.1-2012 Low-voltage switchgear and controlgear—Part 1:General rules GB/T 14048.1-2023 Low-voltage switchgear and controlgear—Part 1:General rules GB/T 3309-1989 Mechanical test at ambient temperature for high-voltage switchgear GB/T 191-2025 Graphical symbols marking for handling and storage of packages