JJF 1701.4-2019 Program of Pattern Evaluation of Instrument Transformers—Part 4:Current Transformers

JJF 1701.3-2019 Program of Pattern Evaluation of Instrument Transformers—Part 3:Inductive Voltage Transformers JJF 1701.5-2019 Program of Pattern Evaluation of Instrument Transformers—Part 5:Capacitor Voltage Transformers JJF 1701.6-2019 Program of Pattern Evaluation of Instrument Transformers—Part 6:Three-phase Combined Instrument Transformers

GB/T 20840.1-2010 Instrument transformers—Part 1:General requirements GB/T 20840.2-2014 Instrument transformers—Part 2:Additional requirements for current transformers IEC 60376 JJG 313-2010 Instrument Current Transformers GB 156-2003 Standard voltages GB/T 156-2007 Standard voltages GB/T 156-2017 Standard voltages 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 2423.23-1995 Environmental testing for electric and electronic products Test Q:Sealing GB/T 2423.23-2013 Environmental testing—Part 2:Test methods—Test Q:Sealing GB/T 3954-2001 Aluminium rod for electrical purpose GB/T 3954-2008 Aluminium and aluminium alloys rod for electrical purpose GB/T 3954-2014 Aluminium and aluminium alloys rod for electrical purpose GB/T 3954-2022 Aluminium and aluminium alloys rod for electrical purpose 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 4756-1998 Petroleum liquids—Manual sampling GB/T 4756-2015 Method for manual sampling of petroleum liquids GB 5585.1-1985 Copper or aluminium and its alloy bus bars for electrical purposes—Part 1:General GB/T 5585.1-2005 Copper or aluminium and its alloy bus bars for electrical purposes—Part 1:Copper and copper alloy bus bars GB/T 5585.1-2018 Copper or aluminium and its alloy bus bars for electrical purposes—Part 1:Copper and copper alloy bus bars GB/T 5832.2-1986 Determination of trace water in the gases—Dew point method GB/T 5832.2-2008 Determination of moisture in gases—Part 2:Dew point method GB/T 5832.2-2016 Gas analysis—Determination of moisture—Part 2:Dew point method GB/T 7354-2003 Partial discharge measurements GB/T 7354-2018 High-voltage test techniques—Partial discharge measurements GB 7674-1997 Gas-insulated metal-enclosed switchgear for rated voltages of 72.5 kV and above GB/T 7674-2008 Gas-insulated metal-enclosed switchgear for rated voltages of 72.5 kV and above GB/T 7674-2020 Gas-insulated metal-enclosed switchgear for rated voltages of 72.5 kV and above GB/T 8905-1996 The guide for processing and measuring SF6 gas in power apparatus GB/T 8905-2012 The guide for management and measuring SF6 gas in electrical equipment GB/T 11604-2015 Testing procedure of radio interference generated by high voltage equipment GB/T 16927.1-1997 High-voltage test techniques Part 1:General test requirements GB/T 16927.1-2011 High-voltage test techniques—Part 1:General definitions and test requirements GB/T 16927.2-1997 High-voltage test techniques Part 2:Measuring systems GB/T 16927.2-2013 High-voltage test techniques—Part 2:Measuring systems GB/T 20138-2006 Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts(IK code) GB/T 20138-2023 Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts(IK code) DL/T 506-2018 The method for measuring humidity of insulating gas in SF6 electrical equipment DL/T 506-2007 The method for measuring humidity of the insulating gas in SF6 electrical equipment JJG 313-1994 Verification Regulation of Current Transformers of Measuring Service GB/Z 156-2025 Good practice for dynamic light scattering(DLS) measurements