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Lauri J. Hiivala Nexans Energy
NEW ICEA STANDARDSAND AEIC SPECIFICATIONFOR MEDIUM-VOLTAGE
POWER CABLES
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Outline
• Existing NEMA/ICEA standards• Changes to ICEA standards• New ANSI/ICEA and
ANSI/NEMA/ICEA standards• AEIC specifications• Availability of standards and
specifications
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Changes to ICEA Standards
• Four major standards were based oninsulation material
• All new standards are applicationoriented
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Withdrawn Standards
• NEMA WC 7-1988/ICEA S-66-524Crosslinked Polyethylene InsulatedWire & Cable
• NEMA WC 8-1988/ICEA S-68-516Ethylene Propylene Rubber InsulatedWire & Cable
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New Standards
• Combined TR-XLPE/XLPE (ICEA S-66-524) and EPR (ICEA S-68-516)
• ANSI/ICEA S-94-649-2000 ConcentricNeutral Cables Rated 5 –46 kV
• ANSI/ICEA S-97-682-2000 UtilityShielded Cables Rated 5 – 46 kV
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Other Standards
• ANSI/NEMA WC 53/ICEA T-27-581-2000 Test Methods for ExtrudedDielectric Cables
• ANSI/NEMA WC 54/ICEA T-26-465-465-2000 Guide for Frequency ofSampling Extruded Dielectric Cables
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Significant Changes
• Added utility user requirements toICEA standards
• Previously insulation thicknesseswere minimum average andminimum point
• Deleted requirement for minimumaverage wall thickness.
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Significant Changes
• Raised the minimum point wallthickness
• Added maximum point thickness• Insulation shield stripping tension
requirement: 3 - 24 lbs for alldischarge-free cable designs
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Manufacturer’s Perspective
• ICEA diameters differ from AEIC
• ICEA minimum diameters based onminimum point thickness and lowerthan AEIC CS8 minimum diameters
• ICEA maximum diameters comparedto AEIC CS8:– most are the same– some are 5-15 mils less– a few are 5 mils
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Point ThicknessRequirements for Insulation
Wall
Old ICEA and AEIC Min Max
15 kV 158 none 198 none25 kV 234 none28 kV 252 none35 kV 311 none
New ICEA and AEIC Min Max
15 kV 165 205 210 25025 kV 245 29028 kV 265 31035 kV 330 375
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15 kV 175-mil WallOld AEIC Requirements
AEIC allowed insulation wall thickness to varybetween these limits.
158 234
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15 kV 175-mil WallOld AEIC Requirements
Although AEIC limited the variation between minand max point thickness, that could vary over awide range.
158 234
32
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15 kV 175-mil WallOld AEIC Requirements
Although AEIC limited the variation between minand max point thickness, that could vary over awide range.
158 234
32
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15 kV 175-mil WallOld AEIC Requirements
Although AEIC limited the variation between minand max point thickness, that could vary over awide range.
158 234
32
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15 kV 175-mil WallOld AEIC Requirements
158 234
32
165 205
The new ICEA/AEIC requirements limit the wall thicknesswithin a specific minimum and maximum pointthickness.
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Effect of New DimensionalChanges
• Manufacturers will supply a moreconsistent insulation wall thickness.
• New ICEA diameters will result inlower material usage.
• Consult accessory manufacturer forproper selection
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Old AEIC Specifications
• Were supplements to ICEA standards– CS5-94 (TR-XLPE/XLPE) was
supplement to NEMA WC 7-1988/ICEA S-66-524
– CS6-96 (EPR) was supplement toNEMA WC 8-1988/ICEA S-68-516
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New AEIC Specification
• CS8 combined CS5 (TR-XLPE/XLPE)and CS6 (EPR)
• Supplement to S-94-649 and S-97-682• Shielded 5 kV through 46 kV
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Sections Kept in CS8
• Only six sections from CS5 and CS6were kept in CS8
• A. Preface• G. Internal Irregularity Test (Hot Oil)• H. General
– Procedures, CTRs, TestingFrequency and Repairs
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Sections Kept in CS8
• J. Shipment and Reels• K. Guarantee• M. Qualification Tests
– Tree count• Reduced number of wafers to
count for each test• Added tree counts for 180 and
360 days
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Sections Kept in CS8
– Part of ThermomechanicalQualification Test
– Dissipation Factor Classification inthe CV Extrusion Qualification(Periodic Qualification Test)
• All other sections were either deletedor a sentence was added referring tothe ANSI/ICEA standard
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Other Changes to CS8
• Insulation Shield Field StrippabilityTest performed once per cable coreextruder run at two temperatures
• Appendixes - Same diameter tablesas previously in CS5 and CS6
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User’s Perspective
– AEIC maintained these diametersfor compatibility with cableaccessories
– Common usage of these tables bycable accessory manufacturers
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Range of 1000 kcmil 25 kVCable and Splices
1660 160
1665 120
1515 265
1645 95
1710 60
1500 1550 1600 1650 1700 1750 1800 1850
Diameter in mils
Z
Y
X
ANSI/ICEA
AEIC
20
15
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User’s Perspective
• Accessory manufacturers will havesplices that meet the ANSI/ICEAstandards
• After that, AEIC intends to droptables and use ANSI/ICEA tables
• Utilities must examine the newdiameters with respect to theirpresent accessories.
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Conclusions
• ANSI/ICEA utility cable standards arenow nationally accredited
• AEIC CS8 still supplements theANSI/ICEA utility cable standards
• ANSI/ICEA standards have provideda way to greatly simplify the AEICspecifications
• Cable engineers must ensure cablespecs are designed for accessories.
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Availability of ICEAStandards
Global Engineering Documents
15 Inverness Way EastEnglewood, CO 80112, USA
Tel:(800) 854-7179 or (303) 397-7956,Fax: (303) 397-2740
E Mail: [email protected]
Web Site: http://global.ihs.com
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Availability of AEICSpecifications
Association of Edison IlluminatingCompanies
600 North 18th StreetP.O. Box 2641
Birmingham, AL 35291-0992
Phone: 205.257.3839
http://www.aeic.org