ANSI ICEA T-31-610-2014 TEST METHOD FOR CONDUCTING LONGITUDINAL WATER PENETRATION RESISTANCE TESTS ON BLOCKED CONDUCTORS.pdf

1、 TEST METHOD FOR CONDUCTING LONGITUDINAL WATER PENETRATION RESISTANCE TESTS ON BLOCKED CONDUCTORS Approved by AMERICAN NATIONAL STANDARDS INSTITUTE January 28, 2014 Publication # ANSI/ICEA T-31-610-2014 2014 by INSULATED CABLE ENGINEERS ASSOCIATION, Inc. ANSI/ICEA T-31-610-2014 Approved as an Americ

2、an National Standard ANSI Approval Date: January 28, 2014 Insulated Cable Engineers Assoc., Publication # T-31-610-2014 TEST METHOD FOR CONDUCTING LONGITUDINAL WATER PENETRATION RESISTANCE TESTS ON BLOCKED CONDUCTORS Published by Insulated Cable Engineers Association, Inc. P.O. Box 1568 Carrollton,

3、Georgia 30112 Copyright 2014 by the Insulated Cable Engineers Association. All rights including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American Copyrig

4、ht Conventions. NOTICE 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 eve

5、ry person 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 toge

6、ther persons 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 soundne

7、ss of any 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, app

8、lication, or reliance on this document. ICEA disclaims and makes no guaranty or warranty, expressed or implied, as to the accuracy or completeness of any information published herein, and disclaims and makes no warranty that the information in this document will fulfill any of your particular purpos

9、es or needs. 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

10、 any person 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 ca

11、re in any 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 e

12、nforce compliance 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

13、 to ICEA and is solely the responsibility of the certifier or maker of the statement.ANSI/ICEA T-31-610-2014 Page i Copyright 2014 by the Insulated Cable Engineers Association, Incorporated. CONTENTS Page Foreword ii Section 1 GENERAL 1 1.1 SCOPE 1 1.2 GENERAL INFORMATION . 1 1.3 DEFINITIONS 1 Secti

14、on 2 TEST EQUIPMENT 2 2.1 TEST ASSEMBLY . 2 2.2 BENDING CONDITIONING . 2 Section 3 QUALIFICATION TEST PROCEDURES. 3 3.1 SAMPLES 3 3.1.1 Conductor Configuration 3 3.1.2 Insulation Type “Test Method for Conducting Longitudinal Water Penetration Resistance Tests on Longitudinal Water Blocked Cables”. I

15、CEA 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 proper product for his particular need. Existence of an ICEA publication does not in any respect preclude the man

16、ufacture 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 and use of cable made in conformity with this publication. Requests for interpretation of this publication must b

17、e submitted in writing to the Insulated Cable Engineers Association, Inc. P.O. Box 1568, Carrollton, Georgia 30112. An official written interpretation will be provided. Suggestions for improvements gained in the use of this publication will be welcomed by the Association. The members of the ICEA wor

18、king group contributing to the revision of this publication consisted of the following: W. Temple Chairman E. Bartolucci R. Bristol J. Cancelosi W. Crawford D. Elder R. Fleming F. Kuchta P-M. Leblanc D. Masakowski K. Nuckles R. Szlagyi R. Thrash E. Walcott R. Williamson ANSI/ICEA T-31-610-2014 Page

19、1 Copyright 2014 by the Insulated Cable Engineers Association, Incorporated. Section 1 GENERAL 1.1 SCOPE This test method provides for qualification and production test procedures for determining the effectiveness of water blocking components incorporated into the interstices of the stranded and ins

20、ulated conductor as an impediment to longitudinal water penetration into the conductor. Cables qualified under previous editions of T-31-610 do not need to be retested. 1.2 GENERAL INFORMATION U.S. customary units, except for temperature, are specified throughout this standard. Approximate Internati

21、onal System of Units (SI) equivalents are included for information only. 1.3 DEFINITIONS Cable Core: For nonshielded designs, the cable core is the portion of the cable which includes the conductor and the insulation, it may also include a conductor shield. For shielded cable designs, the cable core

22、 is the portion of the cable that includes the conductor, the conductor shield, the insulation and the extruded insulation shield. Extrudable Conductor Filler Compound: An extrudable compound material incorporated in a cable construction intended as an impediment to water penetration. Nominal Insula

23、tion Thickness: The insulation thickness that is used for identification purposes only. The nominal insulation thickness can be found in the applicable ICEA cable standard. Pumpable Conductor Filler Compound: A pumpable compound material incorporated in a cable construction intended as an impediment

24、 to water penetration. 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, a water swellable tape, yarn, or powder, or a combinatio

25、n thereof. Water Swellable Component: A water swellable tape, yarn, or powder, or a combination thereof incorporated in a cable construction intended as an impediment to water penetration. ANSI/ICEA T-31-610-2014 Page 2 Copyright 2014 by the Insulated Cable Engineers Association, Incorporated. Secti

26、on 2 TEST EQUIPMENT 2.1 TEST ASSEMBLY A typical setup is shown in Appendix A. A suitable means shall be provided to apply regulated water pressure to the test assembly. The pressure shall be measured with a gauge having an accuracy error of not more than 5% and a preferred range of 0 to 15 psig (0 t

27、o 103.4 kPag). 2.2 BENDING CONDITIONING Bending mandrels shall be available as necessary to perform the bending conditioning for the qualification test specimens. For cables rated 46 kV or less the bending mandrels shall be sized per Table 2-1. For cables rated above 46 kV through 345 kV bending man

28、drels sized 20(d+D) shall be utilized, where “d” is the conductor diameter and “D” is the cable core diameter. The cable manufacturer may choose to utilize smaller size mandrels. Table 2-1 BENDING MANDRELS FOR CABLES RATED 46 KV OR LESS Nominal Thickness of Conductor Insulation mils (mm) Diameter of

29、 Mandrel as a Multiple of the Measured Outside Diameter of Cable Core 0 1.000 Inches (0 25.40 mm) 1.001 - 2.000 Inches (25.42 50.80 mm) 2.001 Inches and larger (50.82 mm and larger) 169 (4.29) and less 8 10 12 170 (4.31) - 310 (7.87) 10 12 14 311 (7.89) and over - 14 16 ANSI/ICEA T-31-610-2014 Page

30、3 Copyright 2014 by the Insulated Cable Engineers Association, Incorporated. Section 3 QUALIFICATION TEST PROCEDURES 3.1 SAMPLES A qualification sample for the longitudinal water penetration resistance test shall be selected from completed single conductor cable. The sample shall be adequate in leng

31、th to complete all conditioning and testing per Section 3.2. If a jacketed cable is tested it qualifies both jacketed and unjacketed designs. 3.1.1 Conductor Configuration 3.1.1.1 Two Layer Concentric Lay Stranded Qualifying any two (2) layer stranded conductor sample shall be representative of all

32、two (2) layer and single layer stranded conductors. A separate qualification shall be conducted if a tape is used between the conductor and the extruded cable core. Figure 3-1 TWO LAYER CONCENTRIC LAY STRANDED CONDUCTOR 3.1.1.2 Three or More Layer Concentric Lay Stranded Qualifying any stranded cond

33、uctor containing three (3) or more layers of wires shall be representative of all stranded conductors including two (2) layer and single layer stranded conductors. A separate qualification shall be conducted if a tape is used between the conductor and the extruded cable core. Figure 3-2 THREE LAYER

34、CONCENTRIC LAY STRANDED CONDUCTOR 3.1.1.3 Segmental Conductors Qualifying any segmental conductor shall be representative of all segmental conductors. A separate qualification shall be conducted if a tape is used between the conductor and the extruded cable core. ANSI/ICEA T-31-610-2014 Page 4 Copyr

35、ight 2014 by the Insulated Cable Engineers Association, Incorporated. Figure 3-3 SEGMENTAL CONDUCTOR 3.1.2 Insulation Type & Rated Voltage Classification 3.1.2.1 Insulated Cable Rated 2 kV or less Each insulation type (i.e. crosslinked polyethylene, ethylene propylene rubber, polyethylene, etc.) mus

36、t be individually qualified. Qualifying a 600 volt or 2 kV rated cable shall be representative of all voltages rated up to 2 kV. 3.1.2.2 Insulated Cable Rated Above 2 kV through 46 kV Each insulation type must be individually qualified, with the exception that crosslinked polyethylene shall be repre

37、sentative of tree retardant crosslinked polyethylene and vice versa. Qualifying any 15 kV to 46 kV rated shielded cable shall be representative of all shielded cable rated 5 kV to 46 kV and all nonshielded cable rated above 2 kV through 5 kV. 3.1.2.3 Insulated Cable Rated Above 46 kV through 345 kV

38、Each insulation type must be individually qualified. Qualifying any cable rated above 46 kV shall be representative of all cable above rated 46 kV through 345 kV. 3.2 TEST PROCEDURE The outer coverings of the predetermined cable sample length shall be removed as necessary to expose the cable core (f

39、or shielded cable this is the extruded insulation shield and for nonshielded cables having inseparable layers this is the outermost layer). 3.2.1 Designs Employing Water Swellable Components (Tape, Yarn, or Powder) One individual single conductor cable core specimen derived from the cable sample sha

40、ll be tested at room temperature. The sample shall not be subjected to a preconditioning or bending procedure prior to test. 3.2.2 Designs Employing Pumpable or Extrudable Conductor Filler Compound with or without Water Swellable Components Two individual single conductor cable core specimens derive

41、d from the cable sample shall be preconditioned as follows: a. One specimen shall be heated in an air oven, or other suitable apparatus, at the rated ICEA emergency operating temperature for four (4) hours. b. One specimen shall be conditioned at -10C in a suitable cold chamber for four (4) hours. S

42、pecimens may be bent if necessary to accommodate them in the air oven or cold chamber. ANSI/ICEA T-31-610-2014 Page 5 Copyright 2014 by the Insulated Cable Engineers Association, Incorporated. The specimens shall be removed from the conditioning environment at the end of the stipulated period. Upon

43、removal, they shall be bent at the uniform rate of not less than 10 degrees per second or not more than 20 degrees per second for three (3) cycles. Each cycle shall be two (2) 180-degree bends in opposite direction around a mandrel with a diameter as specified in Section 2.2. The initial bend shall

44、be in the direction of the cables as received curvature, if any. The bending test performed in an ambient environment shall be completed within 10 minutes upon removal from the conditioning chamber. 3.2.3 Water Penetration Resistance Test The water penetration resistance test shall be performed on t

45、he center 36-inch 1.0-inch (914-mm 25.4-mm) section of the straightened cable specimen. Prior to testing each conditioned specimen shall be allowed to return to ambient temperature. The ends of each 36-inch (914-mm) specimen shall be cut square and wire brushed to remove excess debris prior to testi

46、ng. A test arrangement similar to that in Appendix A shall be assembled to one end of the test specimen. The test specimen shall be mounted in a vertical or horizontal position and pressure testing shall be conducted at room temperature. Other than the horizontal position, the test assembly shall be

47、 placed at the upper end of the specimen. The water shall be dyed to ensure that any leakage from the cable will be visible. A water pressure specified in the applicable ICEA cable standard shall be introduced within one (1) minute and held for one (1) hour. The cable design is rejected if any water

48、 leakage is detected from the open cable end during the test of either conditioned test specimen. ANSI/ICEA T-31-610-2014 Page 6 Copyright 2014 by the Insulated Cable Engineers Association, Incorporated. Section 4 PRODUCTION TEST PROCEDURES 4.1 SAMPLES A production sample for the water penetration r

49、esistance test shall be selected from insulated cable core or completed single conductor cable. 4.2 TEST PROCEDURE The outer coverings of the predetermined cable sample length shall be removed, as necessary, to expose the cable core (for shielded cable this is the extruded insulation shield and for nonshielded cables having inseparable layers this is the outermost layer). The single conductor cable core specimen derived from the cable sample shall be prepared as follows. The water penetration test shall be performed on a 36-inch 1.0