1、AMSC N/A FSC 6145 INCH-POUND MIL-DTL-24640/18E 8 November 2011 SUPERSEDING MIL-DTL-24640/18D 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRIC, -20 TO +105 C, 600 VOLTS, LIGHTWEIGHT, MULTI-TRIAD, 18 AWG, TYPE 3XSW (INCLUDING VARIATION TYPE 3XSOW) This specification is approved for use by all
2、 Departments and Agencies of the Department of Defense. The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-DTL-24640. Construction (Watertight) First - Tin-coated copper conductor in accordance with table I. Second - Insulation material and
3、basic construction requirements shall be in accordance with SAE-AS81044/12 and tested in accordance with the component wire ratings and requirements listed on this specification sheet. Conformance testing shall be in accordance with SAE-AS81044 prior to cabling. Third - Three conductors, one black,
4、one white, and one red, twisted together. The pitch shall be 2 inch. Fourth - Optional binder tape. Fifth - Braided shield of 38 AWG tin-coated copper strands. Braid coverage shall be no less than 90 percent determined in accordance with WC 27500. Sixth - Shield insulation of two polyester tapes or
5、polyester tape and extruded jacket. Identification codes applied using Method 2. Seventh - The required number of shielded, twisted triads shall be cabled together. Cabling sequence shall be consecutive, starting with number 1 from center outward. Fillers may be used, as necessary, to form a round c
6、able. Eighth - Optional binder tape. Construction Variant for Type 3XSW Ninth - Cross-linked polyolefin jacket (see table II for thickness). NOTE: Manufacturers identification tape or thread is required (see 3.7.3). Construction Variant for Type 3XSOW Ninth - Braided shield, tin-coated copper strand
7、s. Braid must be constructed to meet surface transfer impedance requirements as listed herein. Tenth - Optional binder tape. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24640/18E 2 Eleventh - Cross-linked polyolefin jacket (see table III
8、for thickness). NOTE: Manufacturers identification tape or thread is required (see 3.7.3). TABLE I. Component wire details. Watertight conductor Finished wire Wire size (AWG) Stranding (no. x AWG) Test load life cycle accelerated aging tests (lbs 3%) Low temp. at -40 C Mandrel diameter (inches) Test
9、 load (lbs) 18 7 x 26 0.250 1.0 1.0 TABLE II. Construction details. PIN M24640/18 Type number Number of triads Jacket thickness (inch) (min.) Cable diameter (inch) Cable weight (pounds per 1000 feet) (max.) (min.) (max.) -01UN -02UN -03UN -04UN 3XSW-3 3XSW-7 3XSW-10 3XSW-14 3 7 10 14 0.041 0.044 0.0
10、47 0.047 0.472 0.620 0.803 0.873 0.508 0.668 0.865 0.941 205.0 390.0 625.0 775.0 TABLE III. Construction details - overall shield. PIN M24640/18 Type number Number of triads Jacket thickness (inch) (min.) Cable diameter (inch) Cable weight (pounds per 1000 feet) (max.) (min.) (max.) -01UO -02UO -03U
11、O -04UO -05UO -06UO 3XSOW-3 3XSOW-7 3XSOW-10 3XSOW-14 3XSOW-19 3XSOW-24 3 7 10 14 19 24 0.044 0.044 0.047 0.047 0.050 0.057 0.519 0.659 0.835 0.898 1.010 1.200 0.559 0.711 0.901 0.968 1.090 1.300 271.0 475.0 730.0 880.0 1150.0 1607.0 REQUIREMENTS: Qualification required. Construction details: See ta
12、bles I, II, and III. Component wire: The component wire shall be in accordance with SAE-AS81044 and shall be tested in accordance with the following wire ratings and additional requirements. Temperature rating 135 C (275 F) (max.) conductor temperature Voltage rating 600 volts (root mean square) at
13、sea level Accelerated aging Oven temperature, 2502 C (4823.6 F) for 6 hours Low temp. cold bend -40 C (-40 F) for 4 hours Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24640/18E 3 Blocking 1502 C (3023.6 F) Color In accordance with MIL-STD-
14、104, Class 1 Flammability 30 seconds (max.) 3.0 inches (max.) No flaming of tissue paper Humidity resistance 5000 megohms for 1000 feet (min.) insulation resistance after humidity exposure Dielectric test Primary insulation 6.0 kilovolts (peak), 100 percent impulse test (when tested in lieu of spark
15、 test) Finished wire 8.0 kilovolts (peak), or 3 kHz spark test 5.5 kV, 100 percent test Insulation resistance 5000 megohms for 1000 feet (min.) Life cycle Oven temperature, 2002 C (3923.6 F) for 120 hours Physical properties of primary insulation Tensile strength 2500 lb/in2(min.) Elongation 150 per
16、cent (min.) Shrinkage 0.125 inch (max.) at 2502 C (4822 F) Spark test primary insulation 1500 volts (root mean square), 3 kHz, 100 percent test Surface resistance 500 megohms inches (min.), initial and final readings Thermal shock Oven temperature, 1502 C (3023.6 F) Maximum change in measurement 0.0
17、60 inch Wet dielectric test 2500 volts (root mean square) Wrap test Mandrel wrap test required EXAMINATION AND TESTS: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 7.11 Voltage withstand (volts, root mean square, min.) Conductor to conductor and shield 1000 Component shield
18、to component shield 200 Component shield to overall shield (3XSOW only) 500 Insulation resistance (megohms/1000 feet, min.) Conductor to conductor and shield 2500 Shield to shield (component shield only) 100 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IH
19、S-,-,-MIL-DTL-24640/18E 4 Shield to shield 100 (component shield to overall shield, Type 3XSOW only) Conductor and shield continuity No failure Jacket flaws (Type 3XSOW only) No failure Group A: Visual and dimensional No failure Capacitance Mutual capacitance (at 1 MHz, picofarads/foot (pF/ft), max.
20、) 65 Capacitance unbalance (percent, max.) 15 Characteristic impedance (at 1 MHz, ohms) Not applicable Watertightness No failure (see table IX of MIL-DTL-24640 for limits of water leakage) Weight No failureGroup B: Cold bending No failure Drip No failure Cross-link proof test (percent, max.) Jacket
21、50 Tear (lb/in thickness, min.) 35 Physicals (unaged) Jacket Tensile strength (lb/in2, min.) 1300 Elongation (percent, min.) 160 Attenuation (at 3 MHz, dB/100 feet, max.) Not applicable Gas flame (1 hour) Not applicable Group C: Physicals (aged), air oven Jacket Tensile strength (percent of unaged,
22、min.) 60 Elongation (percent of unaged, min.) 60 Permanence of printing (conductor insulation, cycles, min.) Not applicable Permanence of printing (jacket, cycles, min.) 125 Heat distortion (percent of unaged, max.) 30 Cable sealant removability No failure Provided by IHSNot for ResaleNo reproductio
23、n or networking permitted without license from IHS-,-,-MIL-DTL-24640/18E 5 Shrinkage No failure Surface transfer impedance (Type 3XSOW only) Milliohms per meter (max.) 700 EMP response (dB, min.) 60 Group D: Flame propagation No failure Qualification Inspection: Qualification inspection shall includ
24、e basic electricals; groups A, B, C, and D; plus the following: Aging and compatibility (cable) No failure Acid gas equivalent (percent, max.) Jacket 2 Fillers 2 Insulation 18 Halogen content (percent, max.) Jacket 0.2 Fillers 0.2 Immersion (jacket) Tensile strength (percent of unaged, min.) 50 Elon
25、gation (percent of unaged min.) 50 Smoke index (max.) Jacket 25 Fillers 45Insulation 10Toxicity index (max.) Jacket 5 Fillers 5 Insulation 1.5 Durometer (jacket) - Type A (hardness, min.) 80 Weathering (jacket) No failure Fungus resistance No failure Abrasion resistance No failure Gas flame (3 hour)
26、 Not applicable Component wire No failure Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24640/18E 6 UNIT ORDERING LENGTHS: Type and size Feet (nominal) 3XSW-3, 3XSW-7, 3XSW-10, 3XSW-14, 3XSOW-3, 3XSOW-7, 3XSOW-10, 3XSOW-14, 3XSOW-19, 3XSOW-
27、24 3 - 10 500 14 - 24 250 CHANGES FROM PREVIOUS ISSUE: Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes. Custodians: Preparing Activity:Army MI Navy SH Navy SH (Project 6145-2009-086) Review Activities: Army AR,
28、AV, CR, CR4 Navy CG, EC DLA CC NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
