1、Designation:F297315Standard Specification forInsulating Lifting Links for Load Lifting Equipment WorkingNear Energized Power Lines1This standard is issued under the fixed designation F2973;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revis
2、ion,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers insulating lifting links used forprotection of workers positioning a load from ac
3、cidentalcontact of the load lifting equipment with live electricalconductors,apparatus,and circuits.1.2 This specification includes design,material,and testingrequirements for the manufacturer and in-service inspection,testing and care requirements for the user or the agent of theuser.1.3 Insulating
4、 links whose primary application does notpertain to power line electrical safety are not within the scopeof this specification.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 This standard does not purport to address all
5、of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E4 Practices for Force Ver
6、ification of Testing MachinesF819 Terminology Relating to Electrical Protective Equip-ment for Workers2.2 IEEE Standard:3IEEE 4 Standard Techniques for High-Voltage Testing2.3 ISO Standard:4ISO 75001 Metallic materials-Verification of static uni-axial testing machines-Part 1:Tensile testing machines
7、-Corrigendum3.Terminology3.1 DefinitionsTerminology used in this specification is inaccordance with Terminology F819.3.2 Definitions of Terms Specific to This Standard:3.2.1 design verification test,ntest made on a sampletreated as representative of an industrial product.3.2.2 electrical test,na tes
8、t ensuring that a product meetsthe minimum electrical requirements of the standard.3.2.3 flashover,na disruptive discharge over the surface ofthe insulating link.3.2.4 mechanical test,na test confirming that a productmeets the minimum mechanical requirements of a standard.3.2.5 proof load,nspecific
9、mechanical load applied in theperformance of the proof load test.3.2.6 proof test,nmechanical and electrical tests per-formed by the manufacturer on all production units.3.2.7 puncture,ndisruptive discharge through an insula-tor.3.2.8 qualified personnel,npersonnel who,by possessionof a recognized d
10、egree,certificate,professional standing,orskill,and who,by knowledge,training,and experience,havedemonstrated the ability to deal with problems relating to thesubject matter,the work,or the project.3.2.9 rated load,nthe maximum working load.3.2.10 visual inspection,nvisual check made to detectdefect
11、s that impede the performance of a product(s).4.Materials and Manufacture4.1 The mechanical design factor shall not be less than 5.0times its rated load for ratings up to 100 tons and 4.0 timesrated load for ratings 100 tons and up.1This specification is under the jurisdiction of ASTM Committee F18
12、onElectrical Protective Equipment for Workers and is the direct responsibility ofSubcommittee F18.55 on Inspection and Non-Destructive Test Methods for AerialDevices.Current edition approved Oct.1,2015.Published November 2015.Originallyapproved in 2014.Last previous edition approved in 2014 as F2973
13、-14.DOI:10.1520/F2973-152For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Institute of Electrical an
14、d Electronics Engineers,Inc.(IEEE),445 Hoes Ln.,Piscataway,NJ 08854,http:/www.ieee.org.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-29
15、59.United States1 4.2 The electrical design factor of the link shall not be lessthan 2 times it rated use voltage.4.3 The insulation system shall not absorb water and shallhave a water repellent surface.4.4 Weather shields shall be made of impact resistantnonconductive material.4.5 UV resistant poly
16、mers should be employed by themanufacturer if,without them,electrical performance may beaffected.4.6 Steel used shall meet ASTM or AISI standards.5.Workmanship and Finish5.1 The insulating surface of the links shall be free ofcracks,nicks,gouges,damage to the insulating surface thatwould affect its insulating properties in both dry and wetconditions.5.2 MarkingsEachlinkshouldbearpermanent,accessible,and readily visible markings that include,at aminimum,the manufacturers mark,ASTM XXX,unit serial
