ICEA S applies to materials, constructions, and testing of crosslinked polyethylene (XLPE) and ethylene propylene rubber (EPR). Find the most up-to-date version of ICEA S at Engineering ANSI / ICEA S Standard for extruded insulation power cables rated above 46 through. kV. ISO Standards. Our systems comply with the.
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A semiconducting tape may be used between the conductor and the extruded shield in which case it shall not be considered as part of the extruded shield thickness. This does not include douds, swirls or flow patterns which are normally associatedwith the extnrsion process. Size of conductors in circular mils.
Defects shall not be such that they protrude through the conductor shield. The metal shieldsheath shall be applied in such a manner that electrical continuity or contiguity will not be distorted or disrupted during normal installation bending. The temperature at which the cables are qualified shall be reported.
Desired ampacity for normal and emergency operation. Nominal phase to phase voltage. The thickness of the copper sheath shall be at least 0. Class II is for Discharge-Free designs only. At any given ss, the maximum diameter, minimum diameter, and two additional diameters which bisect the two angles formed by the maximum and minimum diameters shall be measured. Either the 15 minute, 30 minute or 60 minute ac test is required.
Only the sample with the most shrinkback of the five shall be considered using the total shrinkback of both ends.
The potential of this element is essentially the same as the conductor. A representative annular cross section containing the extruded conductor shield and insulation shield, shall be cut from the cable.
An extruded compound used for the conductor shield which has a dielectric constant typically between 8 and The cotangent of the dielectric phase angle of a dielectric material or the tangent of the dielectric loss angle.
Those with 5 and greater carbon atoms are derived from Greek numbers Penta, hexa, etc. An optical coupling agent such as mineral oil, glycerin or silicone oil shall be used 72 enhance the observation 7720 imperfections within the wafers. This solution may be reused for subsequent tests provided that it works as effectively ocea a fresh solution. The resistance of the conducting component between the electrodes shall be determined at the specified temperature.
Phase-to-ground test voltage Vented Water Tree: Table Lead Sheath Thickness 6. There shall be no water between underlying layers and the jacket in accordance with 9.
If both such second samples pass the test, the lot of cable except the length represented by the first sampleshall be considered as meeting the requirements of 1008 standard. The specimen shall be stretched at the rate of 20 inches mm per minute jaw speed until it breaks.
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Properly chosen conductive, cloth-type semiconducting bedding tapes can be used to minimize this problem. This coating may be graphite or other suitable material. The sample shall be heated by circulation of current so that the conductor is at the designated emergency operating temperature for the cable design being ixea. A shield applied over the insulation results in a symmetrically distributed radial stress, thus utilizing the insulation to its greatest efficiency Figure D2b.
The volume resistivity of the extruded insulation shield shall not exceed ohmmeter at the maximum normal operating temperature and at a temperature of OCfor cables with an emergency overload temperature rating of OC.
It may or may not be cut into shorter lengths before it is supplied to the end use customer. Plan C One test for each 50, feet 15, m of cable or at least once per cable core extruder run. The extruded material shall be either semiconducting or nonconducting for ethylene propylene rubber EPR type insulation and semiconducting only for crosslinked polyethylene XLPE type insulation.
If 10 percent or less fail, each reel shall be tested and shall be judged upon the results of such individual tests. Test 2 5 Vg Mils mm kv 0 At the end of this 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 16 to 96 hours.
Butted tapes shall not be permitted.