ICEA S 108 720 PDF

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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The cable shall be cut using a fine tooth saw at the 1. The electrical stress at the conductor shall not exceed the values given in Table or the stress qualified by the manufacturer whichever is lower. Desired ampacity for normal and emergency operation.

ICEA S – PDF Free Download

I Iceaa Conductors 1. The values may be obtained from a table giving the areas of segments of a unit cirde for the ratio of the height of the segment to the diameter of the circle. The portion of the cable that is to be used for terminations need not be bent. During installation, the conductor typically iS a mechanical load-bearing component of a cable.

Test samples shall be conditioned at the test temperature for 1 hour prior to performing the tensile pull. A dc or 60 Hz ac source can be used. The purpose of an insulation shield is to confine the electric field within the insulation and to symmetncaliy distribute voltage stresses in the cable insulation. Requirements of a icfa ASTM standard shall be determined in accordance with the procedure or method designated in the referenced ASTM standard unless othewke specified in this standard.

The diredion of lay may be right-hand or left-hand. Maximum phase to phase operating voltage.

Connect the two inner electrodes potential to potentiometer leads of a bridge or to a voltmeter. The conductor shall 1008 protrude beyond the insulation total of both ends by more than the amounts shown in Table If a jacket specimen passes the minimum requirement with irregularities, then their removal is not required.

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ICEA S-108-720

A completed length of cable which has passed all test requirements. 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 conductor shield shall be easily removable from the conductor and the outer surface of the extmded shield shall be firmly bonded to the overlying insulation. Nominal phase-to-phase operating voltage Rated Voltage. This problem is primarily the result of thermal expansion of the cable core which can be very significant at conductor temperatures as high as “C.

The resuiting wafer shall be at least 25 mils 0. They can also wrinkle and crack. The metallic shield can consist of wires, flat straps, tape, foils or a sheath. This test is conducted to verify that the cable has not failed on the last impulse.

It is recornmended that the minimum size conductor be in accordance with Table The minimum wire size shall be 18 AWG. Other alloy lead sheaths may be furnished if the composition is mutually agreed upon by the purchaser and the manufacturer. ASTM B for compact round stranded aluminum conductors using single input wire constructions. This procedure shall be repeated after placing new granules in the cap.

For other voltage ratings and conductor sizes, specific agreement between purchaser and manufacturer in the selection of insulation thickness for each application is required.

Table Extruded Conductor Shield Thickness 3. Polymers can be manufactured in various ways, as can any copolymer of ethylene and an alkene. Crosslinked polyethylene XLPE with no mineral fillers – Ethylene propylene rubber EPR Crosslinked polyethylene is suitable for dry locations and wet locations w-rth radial water bamer at voltages above 46 up to and including kV between phases.

Ambient air temperature andor ambient ground temperature at burial depth. Specimens shall be placed in the jaws of the testing machine with a maximum distance between jaws of 4 inches The highest conductor temperature permissible for any part of the cable during a circuit fault of specified time and magnitude.

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The two potential electrodes inner shall be at least 2 inches 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 tested.

The height of the segment is the wall of insulation on the side from which the slice is taken. A representative annular cross section containing the extruded conductor shield and insulation shield, shall be cut from the cable. The initially applied ac test voltage shall be not greater than the icae ac voltage of the cable under test.

Alternately, iceea cable may be wrapped with insulating material provided that the cable is formed into a loop with a “U” bend as described above. If thermal insulation is used, the “U” bend must be supported during this test. The cutting blade shall be sharp and shall produce wafers with uniform thickness and with very smooth surfaces.

A volume resistivity of A localized area in crosslinked polyethylene insulation which is dissimilar in color ranging from bright yellow to dark red from the surrounding insulation, which passes light and is not always readily removable from the insulation matrix.

The minimum thickness of flat straps iceq be 0. Joints in the tape shall be made electrically continuous by welding, soldering, or brazing. A localized area in crosslinked polyethylene insulation dissimilar to the surrounding insulation which passes light and is not readily removable from the insulation matrix.

Either the 15 minute or the 30 minute ac test is required. Tests defined in Part 1O of this standard with specific test frequency.

Cables without insulation shields have electric fields that extend partially within the insulation and whatever exists between the insulation and ground.