Connection fittings are used for connecting two wires and can meet the mechanical and electrical performance requirements of the wires. This standard specifies the requirements for the design, manufacturing, testing, acceptance, marking, and packaging of connection fittings for overhead lines. This standard is applicable to the connection fittings for overhead line conductors and ground wires with a rated voltage of 10kV and above. The connection fittings used for lines below 10kV can refer to this standard. Hardware used in severely corrosive and polluted environments, high altitude areas, and cold areas should also meet the provisions of other relevant standards. 2 Normative References: The clauses in the following documents become clauses of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. However, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this standard. GB/T 12 Half Round Head Square Neck Bolt GB/T41 Hexagon Nut Grade C (GB/T 41-2000, ISO 4034:1999, EQV) GB/T 93 Standard Spring Washers (GB/T 93-1987, DIN 137, EQV) GB/T 95 Plain Washers Grade C (GB/T 95-2002, ISO 7091:2000, EQV) GB/T 197 General Thread Tolerances (GB/T 197-2003, ISO 965-1:1998, MOD) GB/T 699 High Quality Carbon Structural Steel GB/T 700 Carbon Structural Steel (GB/T 700-2006, ISO 630:1995, NEQ) GB/T 1173 Cast Aluminum Alloy (GB/T 1173-1995, ASTM B26:1992, NEQ) GB/T 1972 Butterfly springs GB/T 2314 General technical conditions for power fittings (GB/T2314-2008, IEC 61284:1997, MOD) GB/T 2317.1 Test methods for power fittings Part 1; Mechanical testing (GB/T 2317.1-2008, IEC 61284:1997, MOD) GB/T 2317.2 Test methods for power fittings Part 2: Corona and radio interference tests (GBT 2317.2-2008, IEC61284:1997, MOD) GBT 2317.3 Test methods for power fittings Part 3: Thermal cycling test (GB/T 2317.3-2008, IEC 61284:1997, MOD) GB/T 2317.4 Test methods for power fittings Part 4: Acceptance rules GB/T 3190 Chemical composition of wrought aluminum and aluminum alloys [GB/T 3190-2008, ISO 209:2007] (E) GB/T 4437.1 Aluminum and Aluminum Alloy Hot Extruded Pipe Part 1: Seamless Round Pipe GB/T 5781 Hexagon Head Bolt Full Thread Grade C (GB/T 5781-2000, ISO 4018:1999, BQV)
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