GB/T 13031-1991 Marine a.c. electrical power systems with voltages in the range above 1kV upto and including 11kV

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 1984-2003 High-voltage alternating-current circuit-breakers GB/T 1984-2014 High-voltage alternating-current circuit-breakers GB/T 1984-2024 High-voltage alternating-current circuit-breakers GB/T 3804-2004 High-voltage alternating-current switches for rated voltage above 3.6 kV and less than 40.5 kV GB/T 3804-2017 High-voltage alternating current switches for rated voltage above 3.6 kV and less than 40.5 kV 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/T 4942.1-2001 Classification of degrees of protection provided by enclosures of rotating electrical machines (IP code) GB/T 4942.1-2006 Degrees of protection provided by the integral design of rotating electrical machined(IP code)—Classification GB/T 4942.2-1993 Degrees of protection provided by enclosures for low-voltage apparatus GB/T 7357-1998 Electrical installations in ships—System design—Protection GB/T 7357-2010 Electrical installations in ships—System design—Protection GB/T 13029.1-2003 Electrical installations in ships—Choice and installation of cables for low-voltage power systems GB/T 7357-2025 Electrical installations in ships—System design—Protection GB/T 13029.1-2025 Electrical installations in ships—Part 1:Choice and installation of electrical cables