MT/T 412-1995

GB 998 GB 1497 GB/T 1411-2002 Dry,solid insulating materials—Resistance test to high-voltage,low-current arc discharges GB/T 1804-2000 General tolerances for linear and angular dimensions without individual tolerance indications 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 3836.2-2000 Electrical apparatus for explosive gas atmospheres—Part 2:Flameproof enclosure “d” GB 3836.2-2010 Explosive atmospheres—Part 2:Equipment protection by flameproof enclosures "d" GB/T 3836.2-2021 Explosive atmospheres—Part 2:Equipment protection by flameproof enclosures “d” GB 3836.3-2000 Electrical apparatus for explosive gas atmospheres—Part 3:Increased safety “e” GB 3836.3-2010 Explosive atmospheres—Part 3:Equipment protection by increased safety "e" GB/T 3836.3-2021 Explosive atmospheres—Part 3:Equipment protection by increased safety “e” GB/T 4207-2003 Method for determining the comparative and the proof tracking indices of solid insulating materials under moist conditions GB/T 4207-2012 Method for the determination of the proof and the comparative tracking indices of solid insulating materials GB/T 4207-2022 Method for the determination of the proof and the comparative tracking indices of solid insulating materials JB/T 834-1999 Tropical low-pressure electrical equipment technical requirements JB/T 4159-2013 General Technical Requirements for Tropical Electrical Products JB/T 4159-1999 Tropical Electrical Products General Technical Requirements