This standard specifies the technical requirements, test methods and inspection rules for porcelain-jacketed and composite-jacketed DC gapless metal oxide arresters (hereinafter referred to as arresters) with a rated voltage of 4.8kV and below. This standard applies to arresters that protect traction motors and electrical equipment from overvoltage damage in DC systems of 3kV and below.
NB/T 42049-2015 Referenced Document
GB 11032-2010 Metal-oxide surge arresters without gaps for a.c. systems
GB/T 16927.1-2011 High-voltage test techniques.Part 1:General definitions and test requirements
GB/T 16927.2-2013 High-voltage test techniques.Part 2:Measuring systems
GB/T 191-2008 Packaging.Pictorial marking for handling of goods
GB/T 23752-2009 Hollow pressurized and unpressurized ceramic and glass insulators for use in electrical equipment with rated voltages greater than 1000V
GB/T 2900.12 Electrotechnical terminology.Surge arresters,low-voltage surge protective devices and components
GB/T 2900.19 Electrotechnical terminology—High-voltage test technique and insulation co-ordination*， 2022-10-14 Update
GB/T 7354 High-voltage test techniques—Partial discharge measurements*， 2018-09-17 Update
GB/T 775.1-2006 Test method for insulators.Part 1: General test methods
GB/T 775.3-2006 Test method for insulators.Part 3:Mechanical test methods
GB/T 999-2008 Voltage ratings of D.C.electric traction system