This standard is applicable to the bridgstock type damper, including the damper that is used at the single conductor (earth conductor) and multiple conductors. As for other types of dampers, the users may put forward corresponding requirements according to part of provisions specified in this standard.
In most cases, the test method and test parameter of damper may be negotiated by the user and seller and shall be explained in the contract.
1. Scope
2. Normative References
3. General requirements
3.1 Design
3.2 Materials and fasteners
3.3 Quality, dimensions and tolerance
3.4 Anticorrosion
3.5 The hammerhead and the head end of iron wire strand shall not be welded; the connecting types such as rivet press shall be adopted.
3.6 The marking and packing of damper shall comply with those specified in GB/T 2317.4.
4. Quality assurance
5. Test classification
5.1 Type test
5.2 Sample test
5.3 Routine test
5.4 Test items
6. Test method
6.1 Appearance test
6.2 Inspection on dimension, material and quality
6.3 Anticorrosion test
6.4 Grip strength test of wire clip on conductor
6.5 Fastening test of wire clip and bolt
6.6 Grip strength test of hammerhead on iron wire strand
6.7 Grip strength test of wire clip on iron wire strand
6.8 Coronae and radio interference test
6.9 Performance test of damper
6.10 Fatigue test
Annex A (Normative) Function Curve of Wind Input Energy
