ASTM D3555-07
(Specification)Standard Specification for Track-Resistant Black Crosslinked Polyethylene Insulation for Wire and Cable, 90°C Operation
Standard Specification for Track-Resistant Black Crosslinked Polyethylene Insulation for Wire and Cable, 90°C Operation
ABSTRACT
This specification covers track-resistant black crosslinked polyethylene insulation for conducting wires and cables operating continuously at a specified conductor temperature. The insulation is suitable for use for power transmission in overhead spaced-line service that is exposed to sunlight and other atmospheric environments. The prescribed tests cannot be performed unless the insulation is formed around a conductor, but these are done solely to determine the insulation properties and not to test the conductor or completed cable. Each test sample should be subjected to an ac or dc voltage withstand test at voltages that are based on the nominal thickness of the insulation and should comply with the required values for aging, heat distortion, cold blend, U-bend discharge, track resistance, tensile strength, elongation at rupture, track resistance, and surface resistivity.
SCOPE
1.1 This specification covers a track-resistant black crosslinked polyethylene insulation, the base polymer which consists substantially of polyethylene or its copolymers. This insulation shall be carbon black pigmented.
1.2 This type of insulation is considered suitable for use on wire or cable that will be used for continuous operation at conductor temperatures up to 90 °C.
1.3 This insulation is suitable for use on wire or in cable used for power transmission in overhead spaced-line service, installed at temperatures above 25 and exposed to sunlight and other atmospheric environments between 55 and +90 °C.
1.4 In many instances, the insulation cannot be tested unless it has been formed around a conductor. Therefore, tests done on insulated wire in this standard are solely to determine the relevant property of the insulation and not to test the conductor or completed cable.
1.5 Whenever two sets of values are presented, in different units, the values in the first set are the standard, while those in parentheses are for information only.
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Standards Content (Sample)
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Designation:D3555 −07 AnAmerican National Standard
Standard Specification for
Track-Resistant Black Crosslinked Polyethylene Insulation
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for Wire and Cable, 90 °C Operation
This standard is issued under the fixed designation D3555; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2.2 ICEA Standard:
ICEAT-28-562Test Method for Measurement of Hot Creep
1.1 This specification covers a track-resistant black cross-
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of Polymeric Insulations
linked polyethylene insulation, the base polymer which con-
sists substantially of polyethylene or its copolymers. This
3. Terminology
insulation shall be carbon black pigmented.
3.1 Definitions:
1.2 This type of insulation is considered suitable for use on
3.1.1 Fordefinitionsoftermsusedinthisspecification,refer
wire or cable that will be used for continuous operation at
to Terminology D1711.
conductor temperatures up to 90 °C.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 aging, (act of), n—exposure of materials to air at a
1.3 This insulation is suitable for use on wire or in cable
used for power transmission in overhead spaced-line service, temperature of 121 °C for 168 h.
installed at temperatures above −25° and exposed to sunlight
4. Physical Properties
and other atmospheric environments between −55 and +90 °C.
4.1 When tested for physical and aging requirements, heat
1.4 Inmanyinstances,theinsulationcannotbetestedunless
distortion,coldbend,U-benddischarge,surfaceresistivity,and
ithasbeenformedaroundaconductor.Therefore,testsdoneon
track resistance in accordance with Test Methods D470, the
insulated wire in this standard are solely to determine the
track-resistant black crosslinked polyethylene insulation shall
relevantpropertyoftheinsulationandnottotesttheconductor
meet the requirements specified in Table 1.The insulation is to
or completed cable.
meet the requirements for percent hot creep and hot set
1.5 Whenever two sets of values are presented, in different
specified in Table 1. The test is to be performed in accordance
units, the values in the first set are the standard, while those in
with ICEA T-28-562. Only in case of dispute, the solvent
parentheses are for information only.
extraction (gel content and swell ratio) test in Test Methods
D2765 is to be the referee method. The extractables, after a
2. Referenced Documents
drying time of 20 h, shall be no more than 30%.
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2.1 ASTM Standards:
5. Electrical Requirements
D470Test Methods for Crosslinked Insulations and Jackets
5.1 Subject cable specimens to a 5 min ac or dc voltage
for Wire and Cable
D1711Terminology Relating to Electrical Insulation withstand test at voltages which are based on the nominal
thickness of the insulation. Conduct tests in accordance with
D2132Test Method for Dust-and-Fog Tracking and Erosion
Resistance of Electrical Insulating Materials Methods D470 using 125 V/mil (5 kV/mm) for ac tests or 375
V/mil (15 kv/mm) for dc tests.
D2765Test Methods for Determination of Gel Content and
Swell Ratio of Crosslinked Ethylene Plastics
6. Sampling
6.1 Sample the insulation in accordance with Test Methods
1 D470, D2765, and ICEA T-28-562.
This specification is under the jurisdiction of ASTM Committee D09 on
Electrical and Electronic Insulating Materials and is the direct responsibility of
7. Test Methods
SubcommitteeD09.18onSolidInsulations,Non-MetallicShieldingsandCoverings
for Electrical and Telecommunication Wires and Cables.
7.1 Test the insulation in accordance with Test Methods
Current edition approved Oct. 1, 2007. Published October 2007. Originally
D470, D2132, and D2765, modified as noted in Table 1, and
approved in 1977. Last previous edition approved in 2001 as D3555–01. DOI:
10.1520/D3555-07.
ICEA T-28-562.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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Standards volume information, refer to the standard’s Document Summary page on Available from The Insulated Cable Engineers Association, Inc. (ICEA), P.O.
the ASTM website. Box 1568, Carrollton, GA 30112, http://www.icea.net.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D3555−07
TABLE 1 Physical Requirements for Track-Resistant Black Crosslinked Polyethylene Insulation
Physical requirements (unaged):
Tensile strength, min, psi (MPa) 1800 (12.4)
Elongation at rupture, min, % 250
Physical requirements [after aging in an air oven
...
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