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.
Ethylene propylene rubber insulation is suitable for wet or dry locations at voltages above 46 up to and including kV between phases. Cracking of LDPE jackets has also been observed.
It is relied upon to electrically insulate the conductor from other conductors or conducting parts or from ground. If water is present, or there is an indication that it was in contact with water, effective steps shall 7720 taken to assure that the water is removed or that the length of cable containing water under the jacket is discarded.
Your consent to our cookies if you continue to use this website. It shall also yield a temperature gradient across the cable that is within five degrees of the temperature gradient, which would be obtained by placing the cable in a plastic pipe.
Nominal phase-to-gmund operating voltage V,: The highest conductor temperature permissible for any part of the cable during emergency overload of specified time, magnitude, and frequency of application.
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Ethylene propylene rubber insulation has two classifications. Either the 15 minute, 30 minute or 60 minute ac test is required. The corrugation shall be at right angles to the axis of the cable, shall coincide exactly at the overlap, and shall be in contact with the underlying semiconducting layer. The interface between the extruded insulation shield and the insulation shall be cylindrical and free from protrusions and irregularities that extend more than 5 mils 0.
While these cables are applicable to installations which are on grounded systems, they may iceea be used on other cable systems, provided the above dearing requirements are met in completely de-energizing the faulted section.
An official written interpretation will be provided. 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. Tests defined in Part 1O of this standard with specific test frequency. For the shipping length to pass, both samples shall meet the requirements of this section. All ac voltages are rms values. The sample shall be kept clean and shall be handled carefully to prevent surface damage and contamination.
The material qualification is valid until the compound is changed. Nominal phase to phase operating voltage. The length of lay of the flat strap shield shall be not less than six times nor greater than ten times the calcuiated minimum diameter over the flat strap shield. 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 this standard. Part 1O covers qualification test procedures.
Failure of either of the additional specimens shall indicate failure of the sample to conform to this standard. The minimum thickness of the corrugated tape shield before corrugation shall be 0.
Consult cable manufacturer for further information. For information only, their approximate metric equivalents are included. The tensile strength and elongation of the specimens shall then be determined in accordance with 9. ICEA standards are adopted in the public interest and are designed to eliminate misunderstandings between the manufacturer and the purchaser and to assist the purchaser in selecting and obtaining the proper product for his particular need.
If either of the second samples fails to pass the test, the lot of cable shall be considered as not meeting the requirements of this standard. The separator tape, if present, shall not be included as part of,the jacket thickness. A slit made with a razor blade, approximately 0.
The maximumcontinuous or repetitious apparent charge transfer, measured in picocoulombs, occumng at the test voltage. Ac test levels for the appropriate rated voltage are to be used as the basis for ac testing should insulation stresses other than those in Table be utilized. The temperature at which the cables are qualified shall be reported.
Specimen length, gauge mark distance, elongation measurement system, and jaw speed shall be reported with results. A smooth sheath shall be constructed by using a flat metal tape that is longitudinally folded around the cable core and seam welded or by applying over the cable core a seamless sheath or tube.
Alternately, the cable may be wrapped with insulating material provided that the cable is formed into a loop with a “U” bend as described above. A continuous length of cable collected on a reel at the end of an extrusion line. At the end of this period, the specimens shall be removed, allowed to cool to room temperature, and inspected for cracking.
If in conduit, describe size id and od type of conduit metallic or nonmetallicnumber of occupied and unoccupied conduits, whether endosed or exposed, spacing between conduits and burial depth of conduits.