NEMA HP 100 SET-1991 High Temperature Instrumentation and Control Cables.pdf

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1、 NEMA HP 100 HIGH TEMPERATURE INSTRUMENTATION AND CONTROL CABLES NEMA Standards Publication HP 100-1991 (R1999, R2005, R2010) High Temperature Instrumentation and Control Cables Reaffirmed September 10, 2010 Published by: National Electrical Manufacturers Association 1300 North 17th Street, Suite 17

2、52 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 Berne Convention for the Protection of Literary and Artistic Works, and the Inter

3、national 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 document at the time it was developed. Consensus does not necessarily mean that there

4、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 herein is one, are developed through a voluntary consensus standards development

5、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 fairness in the development of consensus, it does not write the document and it do

6、es 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 personal injury, property, or other damages of any nature whatsoever, whether specia

7、l, 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, as to the accuracy or completeness of any information published herein, and dis

8、claims 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 products or services by virtue of this standard or guide.In publishing and making t

9、his 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. Anyone using this document should rely on his or her own independent judgment o

10、r, 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 available from other sources, which the user may wish to consult for additional vi

11、ews 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, or installations for safety or health purposes. Any certification or other statem

12、ent 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 0503953 075 TABLE OF CONTENTS FOREWORD i SCOPE Section 1 REFERENCED STANDARDS AND GENER

13、AL 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 Thermocouple Conductor Construction . 5 Section 3 INSULATION 7 Materials . 7 Thickn

14、ess . 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 of Conductors . 13 Shielding of Conductors. Component Groups or Cable Core 13 Sec

15、tion 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 Test . 17 Elongation Test . 17 Alternative Elongation Test Method . 17 Aging Test

16、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 Conductor Construction for Other Than Thermocouple 5 Tensile Strength Tests 17 Test S

17、pecimen 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 19 Flame Propagation Test . 19 ElectricdTests 19 Voltage Tests . 19 General 19 A

18、lternating 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 Cables With Metallic Shield . 20 Insulation Resistance Test . 20 Test Apparatus 20 Tes

19、t 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 INSULATION 21 STRANDING FACTOR 23 CONTROL CABLES RESISTANCE TO 15.6C (OF) NEMA HP*100 91 6

20、470247 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 High Performance Wire and Cable Section (formerly known as the High Temperature Insu

21、lated 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 for sizes 24 through 14 AWG, unless otherwise specified. NEMA Standard 6-1 2-1985 N

22、EMA 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 production lot of cable shall be tested in accord- ance with this Standards Public

23、ation 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 wall thickness) on the individual wires and completed cables shall be made in accord

24、ance 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 test specimens shall be kept at room temperature for not less than 30 minutes pri

25、or 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 specimen shall have a length of not less than 6 inches (152 mm), shall be marked

26、 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 inches (508 mm) per minute Gaw speed) until it breaks. The test specimen shall break b

27、etween 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 test shall allow the use of 1 inch (25.4 mm) gauge marks. Specimen length shall

28、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 shall be taken as the distance between gauge marks at rupture, less 2 inches (50.8

29、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 by the original gauge length and multiplied by 100. NEMA Standard 6-1 2-1 985 7.2

30、.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 inch (25.4 mm). NEMA Standard 6-1 2-1 985 7.2.5 Aging Test Test specimens of sim

31、ilar 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 shall be subjected to the aging condition after removing the conductor. The test

32、 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 required tem- perature, for the specified period, in an oven having forced circul

33、ation 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 the com- pletion of the aging tests and the determination of physical properties.

34、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, described in Table 1 of ASTM D 471 at 121C f 1 *C (250“ f 1.8“F). a. Insulation, exce

35、pt 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 temperature for a period of 4 to 24 hours. The tensile strength and elongation o

36、f 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 18 7.2.8 Heat Shock Test Samples of cable of less than 0.750 inch (19.05 mm) sha

37、ll 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 be bent 180“ around the mandrel. The samples shall be held firmly in place and s

38、ubjected 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 without magnification for any visible cracks. All conductors shall then be diele

39、ctrically 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 of the three following test methods shall be used: NEMA Standard 6-1 2-1 995 7.2.

40、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 diameter of the uninsulated conductor shall be measured also, and the original thic

41、kness 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. NEMA Standard 6-1 2-1 995 7.2.9.1.2 Test Specimen For Jackets 50 Mil Or Greater In

42、 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 inch f 1/16 inch (14.3 mm f 1.52 mm) wide shall be prepared. The thickness of th

43、e 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 Specimen For Jackets Less Than 50 Mils Thickness For jackets of less than 50 mils thick

44、ness, 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 PROCEDURE The following steps shall be completed in 3 hours. A Randall & Stickney ga

45、uge, 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,andHP100.4.Attheendof 1 hour, the test specimen shall be placed in the oven, and

46、 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 for 1 hour, at the tempera- ture specified in Table 2-2 of HP 100.1 on Table 2-

47、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-C T2 =y L For the value of T2 for jackets larger than 50 mils, and for slab samp

48、les, 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 read from the gauge. =Diameter of the uninsulated conductor. O Cold Bend Test NEM

49、A 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 the mandrel shall be conditioned for 4 hours at the temperature specified in the