GB/T 30425-2025 Water cooling equipment for converter valves for high voltage direct current(HVDC) ower transmission

GB/T 30425-2013 Water cooling equipment for converter valves for high voltage direct current (HVDC)power transmission

GB/T 3767-1996 Acoustics—Determination of sound power levels of noise sources using sound pressure—Engineering method in an essentially free field over a reflecting plane GB/T 3767-2016 Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Engineering methods for an essentially free field over a reflecting plane GB/T 3859.1-1993 Semiconductor convertors—Specification of basic requirements GB/T 3859.1-2013 Semiconductor converters—General requirements and line commutated converters—Part 1-1:Specification of basic requirements GB/T 4025-2003 Basic and safety principles for man-machine interface, marking and identification Coding principles for indication devices and actuators GB/T 4025-2010 Basic and safety principles for man-machine interface,marking and identification—Coding principles for indicators and actuators GB/T 7190.3-2019 Mechanical draft cooling towers—Part 3:Closed circuit cooling towers GB/T 7251.1-2023 Low-voltage switchgear and controlgear assemblies—Part 1:General rules GB/T 13384-1992 General specifications for packagings of mechanical and electrical products GB/T 13384-2008 General specifications for packing of mechanical and electrical product GB/T 14296-2008 Air cooling and air heating coils GB/T 17799.2-2003 Electromagnetic compatibility—Generic standards—Immunity for industrial environments GB/T 17799.2-2023 Electromagnetic compatibility—Generic standards—Part 2: Immunity standard for industrial environments GB 17799.4-2022 Electromagnetic compatibility (EMC)—Generic standards—Part 4:Emission for industrial environments GB/T 29531-2013 Methods of measuring and evaluating vibration of pumps NB/T 47007-2018 Air-cooled heat exchanger NB/T 47007-2010 Air-cooled heat exchangers NB/T 47013.2-2015 Non-destructive testing of pressure equipment - Part 2: Radiographic testing GB 50235-2010 Code for construction and acceptance of industrial metallic piping