NEMA HP 100-1991 High Temperature Instrumentation and Control Cables《高温测试设备及控制电缆》.pdf

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1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA HP 100-1991 (R2010)High Temperature Instrumentation and Control CablesNEMA Standards Publication HP 100-1991 (R1999, R2005, R2010) High Temperature Instrumentation and Control Cables Reaffirmed September 10, 2010 Published b

2、y: National Electrical Manufacturers Association 1300 North 17th Street, Suite 1752 Rosslyn, Virginia 22209 www.nema.org Copyright 2010 by the National Electrical Manufacturers Association. All rights including translation into other languages, reserved under the Universal Copyright Convention, the

3、Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American Copyright Conventions. NOTICE AND DISCLAIMERThe information in this publication was considered technically sound by the consensus of persons engaged in the development and approval of the docum

4、ent at the time it was developed. Consensus does not necessarily mean that there is unanimous agreement among every person participating in the development of this document.The National Electrical Manufacturers Association (NEMA) standards and guideline publications, of which the document contained

5、herein is one, are developed through a voluntary consensus standards development process. This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this publication. While NEMA administers the process and establishes rules to promote f

6、airness in the development of consensus, it does not write the document and it does not independently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgments contained in its standards and guideline publications.NEMA disclaims liability for any per

7、sonal 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, or reliance on this document. NEMA disclaims and makes no guaranty or warranty, express or implied

8、, 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 purposes or needs. NEMA does not undertake to guarantee the performance of any individual manufacturer or sellers pr

9、oducts or services by virtue of this standard or guide.In publishing and making this document available, NEMA is not undertaking to render professional or other services for or on behalf of any person or entity, nor is NEMA undertaking to perform any duty owed by any person or entity to someone else

10、. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances. Information and other standards on the topic covered by this publication may be a

11、vailable from other sources, which the user may wish to consult for additional views or information not covered by this publication.NEMA has no power, nor does it undertake to police or enforce compliance with the contents of this document. NEMA does not certify, test, or inspect products, designs,

12、or installations for safety or health purposes. Any certification or other statement of compliance with any health or safetyrelated information in this document shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the statement.NENA HP*LOO 91 6470247 050395

13、3 075 TABLE OF CONTENTS FOREWORD i SCOPE Section 1 REFERENCED STANDARDS AND GENERAL INFORMATION 1 Referenced Standards 1 Introduction . 3 Types . 3 Instrumentation Cables . 3 3V Control Cables 3 6ooV Control Cables 3 1OV Control Cables 3 Section 2 CONDUCTORS 5 Conductor Material . 5 Stranding . 5 Th

14、ermocouple Conductor Construction . 5 Section 3 INSULATION 7 Materials . 7 Thickness . 7 Section 4 CIRCUIT IDENTIFICATION 9 Unpaired Cables . 9 Paired Cables 9 Thermocouple or Thermocouple Extension Lead Wires 9 Section 5 ASSEMBLY . 13 Electrical Testing of Individual Conductors . 13 Color Sequence

15、of Conductors . 13 Shielding of Conductors. Component Groups or Cable Core 13 Section 6 JACKETS 15 Introduction . 15 Materiais . 15 Thickness . 15 Section 7 TEST PROCEDURES . 17 Introduction . 17 Physical Requirements . 17 Test Temperature 17 Type of Testing Machine 17 Alternative Tensile Strength T

16、est . 17 Elongation Test . 17 Alternative Elongation Test Method . 17 Aging Test 17 AirOvenTest 17 Oil Immersion Test . 17 Heat Shock Test . 18 Heat Distortion Test 18 Test Specimen 18 Test Specimen For Insulation . 18 18 Test Specimen For Jackets Less than 50 Mil Thickness 18 Test Procedure 18 Cond

17、uctor Construction for Other Than Thermocouple 5 Tensile Strength Tests 17 Test Specimen For Jackets 50 Mil or Greater in Thickness NENA HP*IOO 91 m 6470247 0503954 TOI = Tables Table 4-1 Table 5-1 Table 7-1 Table 7-2 Table 7-3 TABLE OF CONTENTS (Continued) Cold Bendl Test 18 Thickness Determination

18、 19 Flame Propagation Test . 19 ElectricdTests 19 Voltage Tests . 19 General 19 Alternating Current Voltage Test . 19 Direct-Current Voltage Test 19 Direct-Current Spark Test . 19 Impulse Dielectric Voltage Test 19 Test Requirements For Cables Without Metallic Shield . 19 Test Requirements For Cable

19、s With Metallic Shield . 20 Insulation Resistance Test . 20 Test Apparatus 20 Test Procedure 20 Dielectric Constant (SIC) Test Procedure 23 COLOR SEQUENCE FOR INSTRUMENTATION AND 10 TEST VOLTAGES. COMPLETED CABLES 14 TEST VOLTAGES. INSULATED CONDUCTORS 20 TEMPERATURE CORRECTION FACTORS FOR INSULATIO

20、N 21 STRANDING FACTOR 23 CONTROL CABLES RESISTANCE TO 15.6C (OF) NEMA HP*100 91 6470247 0503955 948 Foreword This Standards Publication for High Temperature Instrumentation and Control Cables for the Transmission and Distribution of Low Voltage Electrical Energy was developed and approved by the Hig

21、h Performance Wire and Cable Section (formerly known as the High Temperature Insulated Wire sizes 16, 14 and 12 AWG shali be 19 strands; sizes 10 and 9 AWG shall be 37 strands. NEMA Standard 6-1 2-1985 2.3 THERMOCOUPLE CONDUCTOR CONSTRUCTION Thermocouple conductors shall be solid or seven strands fo

22、r sizes 24 through 14 AWG, unless otherwise specified. NEMA Standard 6-1 2-1985 NEMA HP*:LOO 91 6470247 05039b2 OBB HP 100-1991 Page 6 NEMA HP*ir100 91 6470247 0503972 T27 HP 100-1991 Page 16 NEVA HP*LOO 71 = b470247 0503773 763 W HP 100-1991 Page 17 Section 7 TEST PROCEDURES 7.1 INTRODUCTION Each p

23、roduction lot of cable shall be tested in accord- ance with this Standards Publication and the applicable individual standard sheet. NEMA Standard 6-1 2-1 985 7.2 PHYSICAL REQUIREMENTS Physical tests (tensile strength, elongation, aging, oil immersion, heat shock, heat distortion, cold bend, and wal

24、l thickness) on the individual wires and completed cables shall be made in accordance with the following pme- dures: NEMA Standard 6-1 2-1 985 7.2.1 Test Temperature Unless otherwise used, physical tests shall be made at a room temperature not less than 16C (61 T) and not more than 28C (82.4F). The

25、test specimens shall be kept at room temperature for not less than 30 minutes prior to the tests. NEMA Standard 6-1 2-1 985 7.2.2 Type of Testing Machine be in accordance with 5.0 of ASTM D 638. 7.2.3 Tensile Strength Tests The tensile strength test shall be made on an unstretched test specimen. The

26、 specimen shall have a length of not less than 6 inches (152 mm), shall be marked with gauge marks 2 inches (50.8 mm) apart, and shall be placed in the jaws of the testing machine with a maximum distance between jaws of 4 inches (102 mm). The specimen shall be stretched at a maximum rate of 20 inche

27、s (508 mm) per minute Gaw speed) until it breaks. The test specimen shall break between the gauge marks. The tensile strength shall be calculated on the area of the unstreched specimen. NEMAStandard 6-12-1985 7.2.3.1 Alternate Tensile Strength Test Method An alternate method for the tensile strength

28、 test shall allow the use of 1 inch (25.4 mm) gauge marks. Specimen length shall be not less 4.5 inches (114.3 mm). NEMA Standard 6-1 2-1985 7.2.4 Elongation Test Elongation at rupture shall be determined simultane- ously with the test for tensile strength and on the same specimen. The elongation sh

29、all be taken as the distance between gauge marks at rupture, less 2 inches (50.8 mm), the original gauge length of the test specimen. The percentage The testing machine for tensile and elongation tests shall NEMA Standard 61 2-1 985 of elongation at rupture shall be the elongation in inches divided

30、by the original gauge length and multiplied by 100. NEMA Standard 6-1 2-1 985 7.2.4.1 Alternate Elongation Test Method An alternate method for the elongation test shall allow the use of 1 inch (25.4 mm) gauge marks. Elongation at rupture shall be taken as the distance between the gauge marks, less 1

31、 inch (25.4 mm). NEMA Standard 6-1 2-1 985 7.2.5 Aging Test Test specimens of similar size and shape shall be pre- pared from each sample: three for the determination of the initial or unaged properties, and three for each aging test required for the insulation or jacket being tested. The insulation

32、 shall be subjected to the aging condition after removing the conductor. The test specimens shall be suspended vertically in such a manner that they are not in contact with each other or with the sides of the oven. NEMAStandard 6-12-1985 7.2.6 Air Oven Test The test specimens shall be heated at the

33、required tem- perature, for the specified period, in an oven having forced circulation of fresh air. The oven temperature shall be recorded automatically on a chart and controlled at I1C (33.8.F). The aged specimens shall have a rest period of not less than 16 hours, nor more than 96 hours between t

34、he com- pletion of the aging tests and the determination of physical properties. Physical tests on both the aged and unaged specimens shall be made at approximately the same time. NEMA Standard 6-1 2-1985 7.2.7 Oil immersion Test The following test specimens shall be immersed in ASTM Oil No. 2, desc

35、ribed in Table 1 of ASTM D 471 at 121C f 1 *C (250“ f 1.8“F). a. Insulation, except for the ends, with conductor re- moved. b. Die-cut specimens of the jacket. At the end of the specified test time, the specimens shall be removed from the oil, blotted to remove excess oil and allowed to rest at room

36、 temperature for a period of 4 to 24 hours. The tensile strength and elongation of the speci- mens shall then be determined in accordance with 7.2.3 and 7.2.4 at the same time that the original properiies are determined. NEMA Standard 6-1 2-1 985 NEVA HP*LOO 91 M 6470247 0503974 BTT HP 100-1991 Page

37、 18 7.2.8 Heat Shock Test Samples of cable of less than 0.750 inch (19.05 mm) shall be tightly wound six times around a mandrel, not more than three times the diameter of the sample. Samples 0.750 inch (19.05 mm) and larger shall use a mandrel not more than eight times the OD of the sample and shall

38、 be bent 180“ around the mandrel. The samples shall be held firmly in place and subjected to a test temperature, as shown in Table 2-2 of HP 100.1 or Table 2-1 of HP 100.2, HP 100.3, and HP 100.4 for 1 hour. The samples shall then be removed from oven, allowed to cool, and the outer jackets examined

39、 without magnification for any visible cracks. All conductors shall then be dielectrically tested per 7.4.1.6 or 7.4.1.7. NEMA Standard -12-1985 7.2.9 Heat Distortion Test 7.2.9.1 Test Specimen The test specimen shall be either from the insulation of the conductor or the jacket of the cable and one

40、of the three following test methods shall be used: NEMA Standard 6-1 2-1 995 7.2.9.1.1 Test Specimen For Insulation The initial diameter of a 1-inch (25.4 mm) specimen of the insulated conductor shall be measured with a microme- ter caliper having a flat surface on both the anvil and spindle. The di

41、ameter of the uninsulated conductor shall be measured also, and the original thickness of the insula- tion, Ti , shall be calculated as follows: D-C Ti =- 2 Where: Ti = Original thickness of the insulation. D = Initial diameter of the insulated conductor. C = diameter of the uninsulated conductor. N

42、EMA Standard 6-1 2-1 995 7.2.9.1.2 Test Specimen For Jackets 50 Mil Or Greater In Thickness A sample approximately 8 inches (203 mm) long shall be prepared to have a thickness of 50 mils I 10 mils (1.27 mm f 25 mm) and smooth surfaces. From this sample, test specimens 1 inch (25.4 mm) long and 9/i 6

43、 inch f 1/16 inch (14.3 mm f 1.52 mm) wide shall be prepared. The thickness of the specimen, Ti, shall be measured with a Randall & Stickney gauge, or equivalent, having a 3-1/8 inch (79.5 mm) foot, with no loading other than the 85 grams of the gauge. NEMA Standard 6-1 2-1 985 7.2.9.1.3 Test Specim

44、en For Jackets Less Than 50 Mils Thickness For jackets of less than 50 mils thickness, the use of slab samples of the jacket material shall be permitted. Conductor Size AWG Load on Gauge, Grams 24-20 200 18 300 16 400 14-9 500 Jackets 2000 NEMAStandard 6-12-1985 1. 2. Ti Tz F C 7.2. 7.2.9.2 TEST PRO

45、CEDURE The following steps shall be completed in 3 hours. A Randall & Stickney gauge, or equivalent, with a load as indicated in following tabulation on the foot, shall be placed in an oven which is preheated to the specified temperature shown in Table 2-2 of HP 100.1 or Table 2-1 ofHP 100.2,HP100.3

46、,andHP100.4.Attheendof 1 hour, the test specimen shall be placed in the oven, and both the gauge and the test specimen shall remain in the oven for 1 hour. At the end of this 1-hour period, the specimen shall be placed directly under the foot of the gauge and allowed to remain in the oven under load

47、 for 1 hour, at the tempera- ture specified in Table 2-2 of HP 100.1 on Table 2- 1 of HP 100.2, HP 100.3, and HP 100.4. At the end of this period, the dial of the gauge shall be read for: The value of F for insulated conductors and the thickness of the insulation Tz shall be calculated as follows: F

48、-C T2 =y L For the value of T2 for jackets larger than 50 mils, and for slab samples, the distortion shall be calcu- lated as follows: Ti-T2 xlOO Distortion, percent - Ti =Original thickness of the insulation. =Thickness of the insulation after the heat distor- tion test. =Final outside diameter as

49、read from the gauge. =Diameter of the uninsulated conductor. O Cold Bend Test NEMA Standard 6-1 2-1 995 One end of a cable specimen, not less than 24 inches (609.60 mm) in length, shall be secured to a rotatable mandrel in a cold chamber and the other end to a load weight sufficient to keep the specimen taut on the mandrel. The diameter of the mandrel shail be not more than 10 times the diameter of the specimen. Provision shail be made for rotating the mandrel by means of a handle or NEMA HP*LOO 9L m 6470247 0503975 736 m control located outside the chamber. The specimen and