ASTM F496-2014 Standard Specification for In-Service Care of Insulating Gloves and Sleeves《使用绝缘手套和套袖时保养的标准规范》.pdf

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1、Designation: F496 08F496 14Standard Specification forIn-Service Care of Insulating Gloves and Sleeves1This standard is issued under the fixed designation F496; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last revisi

2、on.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the in-service care, inspection, testing, and use voltage of insulating gloves and sleeves forprotection fr

3、om electrical shock.1.2 The values stated in SI units are to be regarded as the standard. See IEEE/ASTM SI-10.1.3 The following safety hazards caveat pertains only to the test method portion, Sections 6 and 7, of this specification.Thisstandard does not purport to address all of the safety concerns,

4、 if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations priorto use.For a specific warning statement, see 7.2.2. Referenced Documents2.1 ASTM Standards:2D120

5、Specification for Rubber Insulating GlovesD1051 Specification for Rubber Insulating SleevesD2865 Practice for Calibration of Standards and Equipment for Electrical Insulating Materials TestingF696 Specification for Leather Protectors for Rubber Insulating Gloves and MittensF819 Terminology Relating

6、to Electrical Protective Equipment for WorkersF1236 Guide for Visual Inspection of Electrical Protective Rubber Products2.2 ANSI Standards:C 39.5 Safety Requirements for Electrical and Electronic Measuring and Controlling Instrumentation 3IEEE/ASTM SI-10 Standard for Use of the International System

7、of Units (SI): The Modern Metric System23. Significance and Use3.1 Compliance with this specification should continue to provide personnel with insulating gloves and sleeves of known andacceptable quality after initial acceptance in accordance with Specifications D120 and D1051. The specifications h

8、erein are to beconsidered as minimum requirements.3.2 A margin of safety shall be provided between the maximum use voltage and the voltage at which the gloves and sleevesare retested. The relationship between retest voltage and maximum use voltage at which the gloves and sleeves shall be used isshow

9、n in Table 1.3.2.1 When work is not being performed on energized conductors or equipment, or both, any contact with energized conductorsor equipment, or both, would be limited to the phase-to-ground potential. If gloves are the only protection used in such operations,the phase-to-ground voltage to w

10、hich the gloves may be exposed shall be limited to the maximum use voltage of that class gloveas listed in Table 1.3.3 The user of these types of protective equipment shall be knowledgeable of and instructed in the correct and safe inspectionand use of such equipment.1 This specification is under th

11、e jurisdiction of ASTM Committee F18 on Electrical Protective Equipment for Workers and is the direct responsibility of SubcommitteeF18.15 on Worker Personal Equipment.Current edition approved Oct. 1, 2008April 1, 2014. Published November 2008April 2014. Originally approved in 1977. Last previous ed

12、ition approved in 20062008 asF496 06.F496 08. DOI: 10.1520/F0496-08.10.1520/F0496-14.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary p

13、age on the ASTM website.3 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to

14、the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright

15、 ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14. Terminology4.1 Definitions:4.1.1 ozonea very active form of oxygen that may be produced by corona, arcing, or ultraviolet rays.4.1.2 For definitions of other terms, refer to Terminology F819.5

16、. Classification5.1 Gloves and sleeves covered under this specification are designated as Type I or Type II; Class 00, Class 0, Class 1, Class2, Class 3, or Class 4.5.1.1 Type I, nonresistant to ozone, made from a high-grade cis-1,4-polyisoprene rubber compound of natural or syntheticorigin, properl

17、y vulcanized.5.1.2 Type II, ozone resistant, made of any elastomer or combination of elastomeric compounds.5.1.3 The electrical properties correspond to those shown in Table 1. The class designations are those specified in SpecificationsD120 and D1051.6. Inspection and Testing at an Electrical Testi

18、ng Facility6.1 The recommended sequence of inspection and testing of gloves and sleeves at an electrical testing facility is:6.1.1 Check-in, washing, and preliminary inspection,6.1.2 Repair,6.1.3 Electrical test,6.1.4 Drying,6.1.5 Final inspection,6.1.6 Record-keeping and marking, and6.1.7 Powdering

19、, pairing, and packing for storage or shipment.6.2 When gloves and sleeves are received at an electrical test facility, they should be checked in as soon as practicable toeliminate any folds, creases, and improper storage.6.3 The gloves and sleeves shall be washed with a mild soap or mild detergent

20、and water.After washing, the gloves and sleevesshall be thoroughly rinsed with water to remove all soap or detergent and dried. Mild household type chloride bleach may be usedfor disinfectant purposes. Soaps, detergents, and bleaches shall not be used at strengths that would attack or harm the rubbe

21、rsurface.NOTE 1The cleaning agent shall not degrade the insulating qualities of the gloves and sleeves.NOTE 2A commercial tumble-type washing machine may be used, but caution must be observed to eliminate any interior surfaces or edges that willcut, abrade, puncture, or pinch the gloves and sleeves.

22、NOTE 3Gloves and sleeves may be suspended to allow drainage and air circulation or dried in a commercial tumble-type automatic dryer. In anautomatic dryer, caution must be observed to eliminate any ozone or ultraviolet lamps and interior surfaces that will cut, abrade, puncture, or pinch thegloves a

23、nd sleeves.6.4 Prior to the electrical test, gloves and sleeves should be given a preliminary inspection for punctures, tears, cuts, bruises,ozone cutting or checking, or any other obvious conditions that would adversely affect performance. (See Guide F1236). If anyof these conditions are found, the

24、 glove or sleeves shall be rejected, or repaired in accordance with Section 10. Minor surfacecorona cutting or ozone checking in the gauntlet area, (See Fig. 1), above the water line, need not be cause for rejection.6.5 The gloves and sleeves shall be tested in accordance with Section 7.6.6 The glov

25、es and sleeves shall not be air-dried with an air temperature in excess of 65 C (150 F).6.7 The gloves and sleeves shall be given a detailed inspection over their entire surface for physical defects and ozone damage.(See Guide F1236). They may be turned inside out for inside inspection, but only for

26、 the duration of the inspection. They may beTABLE 1 Voltage RequirementsClass Designationof Glove or SleeveMaximum ACUseVoltage rms, VAC RetestVoltagerms, VMaximumDC UseVoltageavg, VDC RetestVoltageavg, V00 500 2 500 750 10 0000 1 000 5 000 1 500 20 0001 7 500 10 000 11 250 40 0002 17 000 20 000 25

27、500 50 0003 26 500 30 000 39 750 60 0004 36 000 40 000 54 000 70 000F496 142inflated with air to enhance the identification of small defects, but caution shall be exercised to avoid over-inflation (see Note 1110).This detailed inspection may be performed prior to the electrical tests, where it can b

28、e demonstrated that the electrical testingprocess does not cause ozone damage.6.8 The inside surface of gloves may be dusted with a powder. Gloves and sleeves should be sorted by pairs and packed inaccordance with Section 8 for field care, inspection, and storage.7. Electrical Tests7.1 Electrically

29、retest gloves or sleeves issued for service. Base the interval between date of issue and retests on work practicesand test experience. It shall not exceed 6 months for gloves and twelve months for sleeves. Gloves or sleeves that have beenelectrically tested but not issued for service shall not be pl

30、aced into service unless they have been electrically tested within theprevious twelve months.7.1.1 Each glove or sleeve shall withstand the 50Hz or 60Hz ac retest voltage (rms value) or the dc retest voltage (averagevalue) specified in Table 1. The test voltage shall be applied continuously for not

31、less than 1 min and not more than 3 min.7.1.2 The insulating gloves tested by the ac method shall also meet the requirements of Table 2.7.2 WarningThe test apparatus should be designed to afford the operator full protection in the performance of his duties.Reliable means of de-energizing and groundi

32、ng the high-voltage circuit should be provided. It is particularly important toincorporate positive means of grounding the high-voltage section of dc test apparatus due to the likely presence of high-voltagecapacitance charges at the conclusion of the test. See ANSI C39.5.7.2.1 The equipment shall b

33、e inspected at least annually to ensure that the general condition of the equipment is acceptable andto verify the characteristics and accuracy of the test voltages.7.2.2 To eliminate damaging ozone and possible flashover along the glove cuff or sleeve openings, there should be a sufficientflow of a

34、ir into and around the glove or sleeve and an exhaust system to adequately remove ozone from the test machine. Consistentozone cutting and checking during the test procedure should be cause to ascertain the adequacy of the exhaust system.7.3 Industries, such as telecommunications, that utilize insul

35、ating gloves as precautionary protection against unintentionalcontact with energized conductors, may increase the maximum interval between issue and retest to nine months.7.4 Both ac and dc voltage retest methods are included and either method may be selected for electrical testing.7.5 Glove Tests:7

36、.5.1 Perform all electrical tests on clean gloves and at normal room temperatures. Fill the gloves, right side out, withconductive, clean water and immerse to a depth in compliance with Table 3 for the retest voltage to be used. The water level duringthe test shall be the same inside and outside the

37、 gloves. Connect the water inside the glove, which forms one test electrode, andthe water in the tank outside the glove, which forms the other electrode, to the opposite terminals of the high-voltage source. Thewater should be free of air bubbles and air pockets inside or outside the glove and the e

38、xposed portion of the glove above the waterline shall be dry.FIG. 1 Rubber GloveGauntlet Area (All Classes)TABLE 2 AC Proof-Test Current, max, mAClassDesignationof GloveRetestVoltage,maxGlove,280 mm(11 in.)Glove,360 mm(14 in.)Glove,410 mm(16 in.)Glove,460 mm(18 in.)50Hz 60Hz 50Hz 60Hz 50Hz 60Hz 50Hz

39、 60Hz00 2 500 6.7 8 10 12 A A A A0 5 000 6.7 8 10 12 11.7 14 13.3 161 10 000 11.7 14 13.3 16 15 182 20 000 13.3 16 15 18 16.7 203 30 000 15 18 16.7 20 18.3 224 40 000 18.3 22 20 24A Not applicable.F496 1437.5.2 Insulating gloves being retested by the ac method shall meet the requirements of Table 2.

40、 If the proof test current is inexcess of these limits, the glove shall be rejected.NOTE 4For further details on recommended equipment and procedures, refer to Specification D120.7.6 Sleeve Tests Perform all electrical tests on clean sleeves right side out and at normal room temperature. Seven metho

41、dsof mounting sleeves are described in the following sections, with test limitations on some of the methods. Both ac and dc proof-testprocedures are included in this section. In each of the six test methods, the inner and outer electrodes shall be connected to theopposite terminals of the high-volta

42、ge source. Electrode to electrode clearances shall be as specified in Table 3.7.6.1 Electrodes:7.6.1.1 Water Electrodes, Inverted MountingIn this method, invert the small end of the sleeve and pull through to the largeend to form an annular trough as shown in cross section in Fig. 2. (see Note 5). I

43、mmerse the sleeve in water and fill the troughwith water until the levels both inside and outside the trough are the same. Particular care should be taken to avoid any sharp foldsin the sleeves as they may cause premature dielectric breakdown at these points.NOTE 5Use of this method may result in ex

44、cessive breakdown failures when tested above 10 000 V ac or 50 000 V dc if the test apparatus doesnot conform with 7.2.2.7.6.1.2 Water Electrodes, Sling MountingIn this method, place a non-insulating pipe or rod at least 51 mm (2 in.) in diameterat about the midpoint between the cuff and underarm ed

45、ge. The pipe or rod should be of sufficient weight to hold the sleeve downto prevent creasing and its length should be no less than the width of the sleeve. Immerse the sleeve in water with the rod in placeand fill with water until the water levels are the same both inside and outside the sleeve, an

46、d the cuff and underarm edges areequidistant above the water line as shown in the cross section in Fig. 3 (see Note 5). Particular care should be taken to avoid anysharp folds in the sleeves as they may cause premature dielectric breakdown at these points.7.6.1.3 Water Electrodes, Hammock MountingTh

47、e sleeve shall be hung in the test machine so that the top of the shoulder area,the top of the underarm, and the cuff edge are all in a horizontal plane, parallel to the surface of the water in the test tank (see Fig.4). The test equipment holding or supporting the sleeve under test should be of suc

48、h design that there is minimal stress createdin the sleeve material. Place a rod or pipe across the top surface of the sleeve at approximately the midpoint between the cuff andunderarm edge. The pipe or rod shall be noninsulating, at least 51 mm (2 in.) in diameter, and of sufficient weight to hold

49、the sleevedown to prevent creasing. The length of the pipe or rod shall be no less than the width of the sleeve. Fill the sleeve with waterTABLE 3 Flashover Clearances Between ElectrodesAClass Designation,Glove or SleeveAC Retest DC Retestin. mm in. mm00 3 76 3 760 3 76 3 761 3 76 4 1022 5 127 6 1523 7 178 8 2034 10 254 12 305A Flashover clearances are stated in terms of the shortest electrical air pathbetween electrodes around the edge of the item being tested. In those caseswhere atmospheric conditions make the specified clearances imprac