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1、BRITISH STANDARD BS 697:1986 Specification for Rubber gloves for electrical purposes UDC 614.896.2:614.825 + 685.45 Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 04:16:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 697:1986 This British Standard, having been prepared under the direction o
2、f the Personal Safety Equipment Standards Committee, was published under the authority of the Board of BSI and comes into effect on 30 April 1986 BSI 02-1999 First published August 1936 First revision January 1940 Second revision August 1953 Third revision March 1960 Fourth revision April 1977 Fifth
3、 revision April 1986 The following BSI references relate to the work on this standard: Committee reference PSM/37 Draft for comment 84/35749 DC ISBN 0 580 14833 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Personal Safety Equipment
4、Standards Committee PSM/- to Technical Committee PSM/37, upon which the following bodies were represented: British Leather Manufacturers Research Association British Railways Board British Rubber Manufacturers Association British Steel Corporation Chemical Industries Association Electricity Supply I
5、ndustry in England and Wales Ergonomics Society Health and Safety Executive Home Office Industrial Safety (Protective Equipment) Manufacturers Association London Regional Transport Ministry of Agriculture, Fisheries and Food Ministry of Defence National Association of Glove Manufacturers Pressed Fel
6、t Manufacturers Association Rubber and Plastics Research Association of Great Britain Trades Union Congress Welding Institute The following body was also represented in the drafting of the standard, through subcommittees and panels: British Telecommunications plc Amendments issued since publication
7、Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 04:16:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 697:1986 BSI 02-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Requirements for all gloves1 3Requirements for gloves for use at potenti
8、als of up to 650 V1 4Requirements for gloves for use at potentials between 650 V and 4 000 V2 5Instructions2 6Marking2 Appendix A Measurement of thickness4 Appendix B Electrical resistance test4 Appendix C Guidance concerning the maintenance, inspection, re-testing and use of rubber gloves after pur
9、chase5 Appendix D Typical dimensions1 Figure 1 Outline of a typical standard glove (internal dimensions)6 Table 1 Maximum leakage currents and glove lengths1 Table 2 Thickness of gloves2 Table 3 Test potentials and leakage currents3 Table 4 Colour codes3 Table 5 Typical internal dimensions6 Publicat
10、ions referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 04:16:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 697:1986 ii BSI 02-1999 Foreword This British Standard has been prepared under the direction of the Personal Safety Equipment Standards Committee. It is a r
11、evision of BS 697:1977, which is withdrawn. It was first published in 1936 and was revised in 1940, 1953, 1960 and 1977. At the time of publication of this British Standard, no corresponding international standard exists. An international standard that will specify gloves and mitts of insulating mat
12、erial for electrical purposes is in the course of preparation within IEC/TC 78, Tools for live working, of the International Electrotechnical Commission. This revision recognizes the need, in certain circumstances, for gloves that are to be used at potentials of up to 650 V to have a high degree of
13、flexibility. The revision takes account of this need in specifying a maximum thickness for the material of such gloves, the minimum thickness being controlled by the ability of the glove to meet the electrical resistance tests. Since 650 V gloves complying with this revised standard are likely to be
14、 thinner than those made to the previous edition, special attention is drawn to the guidance on re-testing and on examination before use given in Appendix C. The three classes of gloves rated at 1 000 V, 3 300 V and 4 000 V are retained, with only minor amendments made to the electrical test require
15、ments. It should be noted that where the Electricity (Factories Act) Special Regulations 1908 and 1944 apply, work on live high-voltage equipment (above 650 V) is prohibited. It is thus the practice for such classes of gloves to be used as an additional safety measure to supplement other primary saf
16、ety precautions used on high-voltage systems, or for use in an emergency e.g. for the purpose of saving life or averting disaster. This revision introduces requirements that take into account the relationship between the length of a glove and its electrical resistance. The double electrical test is
17、retained in this revision to provide an additional safeguard to the user. This was found to be necessary after investigations had been carried out into the effects of storage in humid conditions. Special attention is drawn to Appendix C which gives guidance concerning the maintenance, inspection, re
18、-testing and use of rubber gloves after purchase. This British Standard does not imply that rubber gloves afford the only means of protection for those working on electrical circuits. Every other practicable precaution should be taken against the risk of shock and, whenever possible, the circuit sho
19、uld be isolated. Attention is drawn to the Electricity (Factories Act) Special Regulations referred to above. NOTEThe Health or b) not less than the values specified in 2.3. 2.7 Length The minimum internal length from the tip of the second finger to the edge of the cuff, denoted as dimension J in Fi
20、gure 1, shall be 265 mm for the wrist type and 355 mm for the gauntlet type. NOTEIt is not practicable to specify other dimensions but typical values are given in Appendix D. 3 Requirements for gloves for use at potentials of up to 650 V 3.1 Thickness When the thickness of each glove is measured in
21、accordance with Appendix A, none of the individual measurements taken shall be greater than 1.25 mm. NOTEThe minimum thickness is not specified and is determined only by the requirements of 3.2. 3.2 Electrical resistance 3.2.1 Not less than 24 h after vulcanization, each glove shall be prepared and
22、tested in accordance with Appendix B. The test potential shall be 5 000 V (r.m.s.). Each glove shall withstand the test potential for 1 min without breakdown, and the leakage current shall not exceed the values given in Table 1. Table 1 Maximum leakage currents and glove lengths a)650 V b) 1 000 V c
23、) 3 300 V d) 4 000 V LengthMaximum leakage current mmmA (r.m.s.) up to 3004 above 300 to 3506 above 350 to 4308 above 43010 Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 04:16:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 697:1986 2 BSI 02-1999 3.2.2 On satisfactory completion of the tes
24、t specified in 3.2.1, the gloves shall be removed from the bath and conditioned, fingers-up, for 24 2 h in still air at a temperature of 23 2 C and a relative humidity of not less than 50 %. 3.2.3 Each conditioned glove shall be tested again in accordance with Appendix B at a potential of 5 000 V (r
25、.m.s.) and shall withstand the potential for 1 min without breakdown. The leakage current for each glove shall not exceed the values given in Table 1. 4 Requirements for gloves for use at potentials between 650 V and 4 000 V 4.1 Thickness Neither the average thickness nor the thickness at any one of
26、 the points of measurement on the glove, as determined in each case in accordance with Appendix A, shall be less than the appropriate minimum values shown in Table 2. For gloves of rated voltage 1 000 V, none of the individual measurements of thickness taken in accordance with Appendix A shall be gr
27、eater than 3.0 mm. Table 2 Thickness of gloves 4.2 Electrical resistance 4.2.1 Not less than 24 h after vulcanization each glove shall be prepared and tested as described in Appendix B. The potential shall be the appropriate test potential shown in Table 3. Each glove shall withstand the potential f
28、or 1 min without breakdown and the leakage current for each glove shall not exceed the appropriate value shown in Table 3. 4.2.2 On satisfactory completion of the test specified in 4.2.1, the gloves shall be stored, fingers-up, for 24 2 h in still air at a temperature of 23 2 C and a relative humidi
29、ty of not less than 50 % r.h. 4.2.3 Each conditioned glove shall be tested again in accordance with Appendix B at the appropriate test potential shown in Table 3 and shall withstand the potential for 1 min without breakdown, and the leakage current for each glove shall not exceed the appropriate val
30、ue shown in Table 3. 5 Instructions Instructions shall accompany each pair of gloves and shall include the following information: a) recommendations for storage and cleaning (including maximum washing and drying temperatures); b) appropriate details of inspection and re-testing procedures; c) a stat
31、ement drawing the attention of purchasers and users to the guidance given in Appendix C of BS 697:1986. 6 Marking 6.1 Each glove shall be marked with the following: a) the number and date of this British Standard, i.e. BS 697:19861); b) the name, trade mark or other means of identification of the ma
32、nufacturer; c) the month and year of manufacture; d) the rated potential followed by the word “working” in brackets; e) the size. The marking shall be durable and shall not impair the properties and characteristics of the glove. 6.2 It gloves are colour coded to indicate the rated potential, the col
33、ours used shall be in accordance with Table 4. 6.3 Where punched holes on a preprinted grid are used to impart information, all holes shall be confined to within 20 mm of the edge of the cuff. Rated potential of glove Minimum average thickness Minimum thickness at any one point of measurement V (r.m
34、.s.)mmmm 1 0001.250.65 3 3001.750.90 4 0002.001.00 1) Marking BS 697:1986 on or in relation to a product is a claim by the manufacturer that the product has been manufactured to the requirements of the standard. The accuracy of such a claim is therefore solely the manufacturers responsibility. Enqui
35、ries as to the availability of third party certification should be addressed to the appropriate certification body. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 04:16:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 697:1986 BSI 02-19993 Table 3 Test potentials and leakage currents Table 4
36、 Colour codes Rated potential of glove Test potentialMaximum leakage current Length up to 350 mmLength above 350 mm to 430 mm Length above 430 mm V (r.m.s.)V (r.m.s.)mA (r.m.s.)mA (r.m.s.)mA (r.m.s.) 1 00010 0006810 3 30015 00091113 4 00020 000121416 Rated potentialColour V (r.m.s.) 650White 1 000Re
37、d 3 300Green 4 000Blue Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 04:16:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 697:1986 4 BSI 02-1999 Appendix A Measurement of thickness A.1 Apparatus A.1.1 Micrometer dial gauge, the plunger and anvil of which are right cylinders each having a
38、diameter of 2.50 0.05 mm and are of sufficient length to avoid errors caused by fouling of parts of the gloves on the instrument. The gauge shall have a scale graduated in unit divisions of 0.01 mm and comply, where relevant, with the requirements of BS 907, particularly with respect to the accuracy
39、 of calibration. The dial gauge shall operate under a force of 235 30 mN. A.2 Procedure Measure the thickness of each glove at not less than four points on the back and four points on the palm of each glove. A.3 Report The results of each measurement shall be reported. When checking compliance with
40、the requirements of 4.1, the average of these measurements shall also be reported as the “average thickness”. Appendix B Electrical resistance test B.1 Apparatus B.1.1 Variable sinusoidal low-voltage source with a frequency of approximately 50 Hz and having approximately a sine wave form. B.1.2 Step
41、-up transformer with one end of the secondary winding earthed. The ratio of the peak potential to the r.m.s. potential of the secondary winding shall be within the limits of 2 5 %, i.e. 1.34 to 1.48, under the test conditions. The rating of the equipment shall be such as to meet the requirements of
42、the procedure of B.2. NOTETo prevent damage to equipment and for safety reasons, the voltage source should be equipped: a) with a device to disconnect the power supply rapidly if a glove breaks down, which may consist of a current-sensitive element in the high-voltage supply to the electrodes; and b
43、) a resistor in series with the electrodes to restrict damage by current or voltage surges in the event of breakdown. B.1.3 Suitable control gear and a means of varying the input voltage (see BS 2918). B.1.4 Voltmeter and associated equipment, arranged to measure the r.m.s. test voltage across the g
44、love. The overall error of the voltage-measuring circuit shall not exceed 5 % of the measured value. If a peak-reading voltmeter is used, the figure obtained by dividing the reading by 2 shall be taken to be the r.m.s. potential. NOTELimits to the ratio of peak potential to the r.m.s. potential are
45、specified in B.1.2. The voltmeter shall be connected across the glove either directly, or via a potential divider, or via a potential transformer, or via a potential winding on the step-up transformer (B.1.2). NOTEIt is preferable that one of the first three of these four alternatives be adopted. If
46、 the connection is made via a potential winding on the step-up transformer, the accuracy of indication of the voltage applied to the electrodes shall be unaffected by the loading of the step-up transformer and the series resistor. B.1.5 Current-measuring equipment, for example, a milliammeter. B.1.6
47、 Bath in which the gloves may be immersed in water. B.1.7 Insulating clips or other suitable means for suspending the gloves. B.2 Procedure Clean the cuff with ethanol (industrial alcohol) to prevent flashover caused by water seeping along chalked surfaces. Immerse the glove, suspended by insulating
48、 clips or other suitable means, fingers downwards, in tap water at 23 2 C to a level of 40 mm from the edge of the cuff. Fill the glove with tap water to the same level. After 1 h connect the inner electrode (the water inside the glove) to the high-voltage supply and earth the external electrode (th
49、e water outside the glove). Insert the current-measuring equipment (B.1.5) in series with the glove. Raise the potential applied across the electrodes from zero to the test potential specified in 3.2.1 or Table 3, as appropriate; raise it as rapidly as is consistent with the value being observed on the voltmeter, but not less than 1 kV/s. Maintain the full test potential for 1 min and measure the leakage current (including the capacitive component) during the last 15 s. Then diminish the potential rapidly to zero. NOTE 1Gloves that me