ANSI ICEA T-32-645-2012 Test Method for Establishing Volume Resistivity Compatibility of Water Blocking Components With Extruded Semiconducting Sheild Materials.pdf

1、2017 by INSULATED CABLE ENGINEERS ASSOCIATION, Inc.ANSI/ICEA T-32-645-2012 (R2017)Test Method for Establishing Volume Resistivity Compatibility of Water Blocking Components With Extruded Semiconducting Sheild Materials.Approved as an American National Standard ANSI Approval Date: February 23, 2017 A

2、NSI/ICEA T-32-645-2012 (R-2017) Test Method For Establishing Volume Resistivity Compatibility of Water Blocking Components With Extruded Semiconducting Shield Materials Reaffirmed June 7, 2017 by INSULATED CABLE ENGINEERS ASSOCIATION, Inc. Approved February 23, 2017 by AMERICAN NATIONAL STANDARDS I

3、NSTITUTENOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons engaged in the development and approval of the document at the time it was developed. Consensus does not necessarily mean that there is unanimous agreement among every perso

4、n participating in the development of this document. The Insulated Cable Engineers Association, Inc. (ICEA) standards and guideline publications, of which the document contained herein is one, are developed through a voluntary consensus standards development process. This process brings together per

5、sons who have an interest in the topic covered by this publication. While ICEA administers the process and establishes rules to promote fairness in the development of consensus, it does not independently test, evaluate, or verify the accuracy or completeness of any information or the soundness of an

6、y judgements contained in its standards and guideline publications. ICEA disclaims liability for personal injury, property, or other damages of any nature whatsoever, whether special, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, application

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8、eds. ICEA does not undertake to guarantee the performance of any individual manufacturer or sellers products or services by virtue of this standard or guide. In publishing and making this document available, ICEA is not undertaking to render professional or other services for or on behalf of any per

9、son or entity, nor is ICEA undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judgement or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in an

10、y given circumstances. Information and other standards on the topic covered by this publication may be available from other sources, which the user may wish to consult for additional views or information not covered by this publication. ICEA has no power, nor does it undertake to police or enforce c

11、ompliance with the contents of this document. ICEA does not certify, test, or inspect products, designs, or installations for safety or health purposes. Any certification or other statement of compliance with any health or safety-related information in this document shall not be attributable to ICEA

12、 and is solely the responsibility of the certifier or maker of the statement. ANSI/ICEA T-32-645-2012 (R2017) Page i Copyright 2017 by the Insulated Cable Engineers Association, Incorporated. Contents Page FORWARD . ii Section 1 GENERAL . 1 1.1 SCOPE 1 1.2 GENERAL INFORMATION . 1 1.3 DEFINITIONS . 1

13、 Section 2 TEST SPECIMENS . 2 2.1 SPECIMEN PREPARATION 2 2.2 MEASUREMENT ELECTRODES . 2 Section 3 TEST EQUIPMENT. 3 3.1 MEASURING INSTRUMENT 3 3.2 OVEN 3 3.3 TEMPERATURE RECORDER . 3 Section 4 COMPATIBILITY EVALUATION . 4 4.1 COMPATIBILITY TEST PROCEDURE 4 4.2 PERFORMANCE EVALUATION 4 4.2.1 Volume R

14、esistivity . 4 4.2.2 Volume Resistivity Stability 4 Section 5 APPENDICIES 7 APPENDIX A SPECIMEN PREPARATION PROCEDURE FOR PUMPABLE CONDUCTOR FILLING COMPOUNDS AND WATER SWELLABLE POWDERS . 7 APPENDIX B SPECIMEN PREPARATION PROCEDURE FOR EXTRUDABLE CONDUCTOR FILLER COMPOUNDS, WATER SWELLABLE TAPES, O

15、R WATER SWELLABLE YARNS 10 APPENDIX C VOLUME RESISTIVITY . 12 ANSI/ICEA T-32-645-2012 (R2017) Page ii Copyright 2017 by the Insulated Cable Engineers Association, Incorporated. Foreword This test method for establishing volume resistivity compatibility of water blocking components with extruded semi

16、conducting shield materials, T-32-645, was developed by the Insulated Cable Engineers Association, Inc (ICEA). ICEA publications are adopted in the public interest and are designed to eliminate misunderstanding between the manufacturer and the user and to assist the user in selecting and obtaining p

17、roper product for his particular need. Existence of an ICEA publication does not in any respect preclude the manufacture or use of products not conforming to the publication. The user of this publication is cautioned to observe any health or safety regulations and rules relative to the manufacture a

18、nd use of cable made in conformity with this publication. Requests for interpretation of this publication must be submitted in writing to the Insulated Cable Engineers Association, Inc. P.O. Box 2694, Alpharetta, Georgia 30023. An official written interpretation will be provided. Suggestions for imp

19、rovements gained in the use of this publication will be welcomed by the Association. The members of the ICEA working group contributing to the revision of this publication consisted of the following: P.M. Leblanc Chairman F. Clark E. Bartolucci R. Bristol H. Soleski J. Cancelosi R. Fleming C. Lindle

20、r F. Kuchta D. Farrick R. Szilagyi R. Thrash E. Walcott R. Williamson W. Temple B. Crawford C. Spradlin K. Nuckles ANSI/ICEA T-32-645-2012 (R2017) Page 1 Copyright 2017 by the Insulated Cable Engineers Association, Incorporated. Section 1 GENERAL 1.1 SCOPE This test method provides procedures for es

21、tablishing volume resistivity compatibility of water blocking components with extruded semiconducting shields utilized in MV, HV or EHV power cables. The compatibility test is designed to verify that the electrical properties of a semiconducting material used as a conductor or insulation shield are

22、not adversely affected when exposed to a water blocking component. These water blocking components can be incorporated in a conductor, over a conductor, over an insulation shield, or around a metallic shield or concentric neutral. It describes a test method of demonstrating that the volume resistivi

23、ty and volume resistivity stability remain within their specified limits when a semiconducting material is exposed to a water blocking component at the emergency operating temperature of the cable. 1.2 GENERAL INFORMATION Units in this Standard are expressed in the English system. For information pu

24、rposes only, their approximate metric equivalents are included. 1.3 DEFINITIONS Water Blocking Component: A non-metallic material incorporated in a cable construction intended as an impediment to water penetration. A water blocking component can be a pumpable or extrudable conductor filler compound,

25、 a water swellable tape, yarn, or powder, or a combination thereof. ANSI/ICEA T-32-645-2012 (R2017) Page 2 Copyright 2017 by the Insulated Cable Engineers Association, Incorporated. Section 2 TEST SPECIMENS 2.1 SPECIMEN PREPARATION The combination of water blocking component and semiconducting shiel

26、d material are to be prepared as per the appropriate Specimen Preparation Procedure provided in Appendices A and B. Appendix A: pumpable conductor filler compounds with conductor shield materials; water swellable powders with conductor and insulation shield materials; Appendix B: extrudable conducto

27、r filler compounds with conductor shield materials; water swellable tapes with conductor and insulation shield materials; and water swellable yarns with conductor and insulation shield materials. Alternate methods of specimen preparation may be permitted provided the final test specimens fully compl

28、y with paragraph 2.2 and that Appendices A and B, as applicable, would serve as a referee method. 2.2 MEASUREMENT ELECTRODES Two silver-painted electrodes shall be applied to each side of the semiconducting shield material specimen. The two potential electrodes (inner) shall be at least 2 inches (50

29、.8 mm) apart and shall be 0.125 inch (3.18 mm) minimum width. A current electrode shall be placed at least 1 inch (25.4 mm) beyond each potential electrode. When a high degree of accuracy is not required, this test may be made with only two electrodes spaced at least 2 inches (50.8 mm) apart. After

30、the paint has been allowed to dry for at least one hour at room temperature, copper wires are applied around each silver paint band and twisted to form a tail. Silver paint may be applied to the copper wire to help ensure intimate contact with the electrodes. These copper wires shall be extended to

31、allow resistance measurements of the specimens while at the emergency operating test temperature in an oven. The final test specimens shall be as shown in Figures 1 or 2 based upon the number of electrodes used. ANSI/ICEA T-32-645-2012 (R2017) Page 3 Copyright 2017 by the Insulated Cable Engineers A

32、ssociation, Incorporated. Section 3 TEST EQUIPMENT 3.1 MEASURING INSTRUMENT A suitable instrument (e.g., Wheatstone Kelvin Bridge or Ohmmeter) or instruments (e.g., voltmeter and ammeter) shall be utilized for determining resistance and provide a source of 60 Hz ac or dc voltage. The energy released

33、 in the conducting component shall not exceed 100 milliwatts. 3.2 OVEN A convection type, forced draft, circulating air oven, shall be utilized capable of maintaining any constant ( 3C) temperature up to 140C, e.g., Hot Pack Model 120414, Blue M Model OV-490, Precision Type A. 3.3 TEMPERATURE RECORD

34、ER A suitable recorder shall be utilized for measuring oven temperature continuously. ANSI/ICEA T-32-645-2012 (R2017) Page 4 Copyright 2017 by the Insulated Cable Engineers Association, Incorporated. Section 4 COMPATIBILITY EVALUATION 4.1 COMPATIBILITY TEST PROCEDURE Five specimens shall be subjecte

35、d to the stability of volume resistivity test per ICEA Publication T-25-425, “Guide for Establishing Stability of Volume Resistivity for Conducting Polymeric Components of Power Cables.” When testing water blocking components prepared in accordance with Appendix B (extrudable strand filling compound

36、s, water swellable tapes, or water swellable yarns), in order to maintain good contact with the semiconducting shield material during oven aging, a nominal 1400 gram metal plate may be placed on top of each set of five specimens. Polyester sheets shall be used to isolate the specimens electrically f

37、rom the plate and facilitate resistance measurements. At the conclusion of the stability test, all five specimens are removed from the oven and allowed to cool at room temperature. An attempt to remove as much as possible of the water blocking component shall be made without any damage to the semico

38、nducting shield material specimens. For the four-electrode method, connect the two outer electrodes (current) in series with the current source and an ammeter, or the current leads of a bridge. Connect the two inner electrodes (potential) to potentiometer leads of a bridge, or to a voltmeter. A dc o

39、r 60 Hz ac source can be used. For the two-electrode method, connect the electrodes to an ohmmeter. The resistance of the conducting component between the electrodes shall be measured and the volume resistivity is computed as defined in Appendix C, and recorded. 4.2 PERFORMANCE EVALUATION The combin

40、ation of the water blocking component and the semiconducting shield material is found compatible upon satisfying the requirements of 4.2.1 and 4.2.2. 4.2.1 Volume Resistivity The volume resistivity of each specimen shall not exceed the maximum value allowed by the applicable ICEA Standard for the co

41、nductor shield or insulation shield material. 4.2.2 Volume Resistivity Stability Stability of volume resistivity of each specimen shall be demonstrated as defined and computed per ICEA Publication T-25-425. ANSI/ICEA T-32-645-2012 (R2017) Page 5 Copyright 2017 by the Insulated Cable Engineers Associ

42、ation, Incorporated. or single layer, as applicable COMPONENT T1 = Water Blocking Component to be minimum 0.010“ thick T1 T3 = Band of Silver Conductive Paint to be 0.125“ wide T2 = Semiconducting shield material to be 0.050“ thick T3 T2 FIGURE 1 1.5” WATER BLOCKING TWISTED WIRE LEADS ELECTRODES 5“

43、2“ 0.25“ SHIELD MATERIAL SEMICONDUCTING TWO ELECTRODE METHOD TYPICAL TEST SPECIMEN PREPARATION Where: ANSI/ICEA T-32-645-2012 (R2017) Page 6 Copyright 2017 by the Insulated Cable Engineers Association, Incorporated. 1“ or single layer, as applicable COMPONENT T1 = Water Blocking Component to be mini

44、mum 0.010“ thick T1 T3 = Band of Silver Conductive Paint to be 0.125“ wide T2 = Semiconducting shield material to be 0.050“ thick T3 T2 FIGURE 2 1.5“ WATER BLOCKING TWISTED WIRE LEADS ELECTRODES 5“ 2“ 0.25“ SHIELD MATERIAL SEMICONDUCTING FOUR ELECTRODE METHOD (OPTIONAL) TYPICAL TEST SPECIMEN PREPARA

45、TION Where: ANSI/ICEA T-32-645-2012 (R2017) Page 7 Copyright 2017 by the Insulated Cable Engineers Association, Incorporated. Section 5 APPENDICIES APPENDIX A SPECIMEN PREPARATION PROCEDURE FOR PUMPABLE CONDUCTOR FILLING COMPOUNDS AND WATER SWELLABLE POWDERS (NORMATIVE) 1. Mold a 4-inch (10.16 cm) b

46、y 5-inch (12.70 cm) nominal 50-mil (1.27 mm) thick slab from the semiconducting shield material. Thickness tolerance 5 mils (0.13 mm). 2. Prepare a template to the same external dimensions of the molded plaque and with a thickness of minimum 10-mils (0.25 mm). A window shall be cut out from the cent

47、er of the template with internal dimensions of 2.5-inches (6.35 cm) wide by 1.5-inches (3.81 cm) long. 3. The template is to be placed centered over the molded plaque as shown in Figure A-1 and tightly secured. 4. Obtain a sufficient quantity of conductor filling compound or water swellable powder a

48、nd place it into the window on the template as shown in Figure A-2. The quantity must be sufficient to completely fill the window after pressing as shown in Figure A-3. Water swellable powder may be wetted to assist in adhesion to the plaque of semiconducting shield material. 5. Position a sheet of

49、5-mil (0.13 mm) thick polyester film 4-inch (10.16 cm) by 6-inch (15.24 cm) over the template. 6. Position the slab between 5-mil (0.13 mm) thick polyester film separator sheets, approximately 8-inch (20.32 cm) by 8-inch (20.32 cm). These sheets will prevent excess water blocking component from contaminating the press platens. 7. Place two steel shims of suitable thickness on the lower plate as shown in Figure A-3 so that the final thickness of the water blocking component, measured after the specimen is removed from