Technical requirements for overhead line helical fittings
1 Scope
This standard specifies the product classification and technical requirements of overhead line helical fittings, and is applicable to helical suspension clamps, helical strain clamps, helical connecting strips and helical protective fittings for overhead lines.
2 Normative references
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. At the time of publication, all editions cited are valid. All standards are subject to revision, and all parties using this standard are encouraged to investigate the possibility of applying the latest editions of the following standards.
GB/T 1179-1983 Aluminium stranded conductors and aluminium conductors steel-reinforced
GB/T 2317.1-2000 Mechanical tests for electric power fittings
GB/T 2317.2-2000 Corona and RIV tests for electric power fittings
GB/T 2317.3-2000 Heat cycle tests for electric power fittings
GB/T 2317.4-2000 Acceptance inspection, marking and packing for electric power fittings
GB/T 2479-1996 Conventional abrasive - White fused alumina
GB 12527-1990 Aerial insulated cables for rated voltages up to and including 1kV
GB 14049-1993 Aerial insulated cables with rated voltages of 10kV and 35kV
JB/T 8177-1999 The hot dip galvanized coating of metallic parts for insulators general technical specification
YD/T 5004-1993 Galvanized steel strand
IEC 60888-1987 Zinc-coated steel wires for stranded conductors
IEC 61284-1997 Technical conditions and test methods for overhead line electric power fittings
3 Product classification
3.1 Support and suspension fittings (see Annex A for helical suspension clamps)
It consists of metal preformed armour rod, metal sheath and rubber pad, which is used to hang steel-cored aluminum stranded wire or optical fiber composite ground wire on straight line pole tower.
Foreword I
1 Scope
2 Normative references
3 Product classification
4 Technical requirements
5 Test methods
6 Acceptance rules
7 Marking and packaging of preformed armour rod
Annex A (Informative) Product parameters of helical suspension clamp
Annex B (Informative) Product parameters of helical strain clamp
Annex C (Informative) Product parameters of helical connecting strip
Annex D (Informative) Product parameters of protective fittings
