1、AMSC N/A FSC 6145 INCH-POUND MIL-DTL-24640/11E 8 November 2011 SUPERSEDING MIL-DTL-24640/11D 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRIC, -20 TO +105 C, 600 VOLTS, LIGHTWEIGHT, MULTI-TRIAD, 18 AWG, TYPES 3XS AND 3XSW This specification is approved for use by all Departments and Agencie
2、s of the Department of Defense. The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-DTL-24640. Construction, Non-Watertight (3XS) and Watertight (3XSW) First - 19-strand, tin-coated copper conductor, 18 AWG. Watertight constructions shall be
3、constructed with 7 strands. Second - Component wires shall be SAE-AS81044/12, except identification shall be in accordance with the codes and methods of MIL-DTL-24640. Testing shall be in accordance with the component wire ratings and requirements listed in this specification sheet. Conformance test
4、ing shall be in accordance with SAE-AS81044 prior to cabling. Third - Three conductors, one black, 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 p
5、ercent determined in accordance with WC-27500. Sixth - Shield insulation of two polyester tapes or 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 consecutiv
6、e, starting with number 1 from center outward. Fillers may be used, as necessary, to form a round cable. Eighth - Optional binder tape. Ninth - Cross-linked polyolefin jacket (see table I for thickness). NOTE: Manufacturers identification tape or thread is required (see 3.7.3). Provided by IHSNot fo
7、r ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24640/11E 2 TABLE I. Construction details. PIN M24640/11 Type number Number of triads Jacket thickness (inch) (min.) Cable diameter (inch) Cable weight (pounds per 1000 feet) (max.) (min.) (max.) -01UN -02UN 3XS-7 3
8、XSW-7 3 3 0.044 0.044 0.601 0.600 0.647 0.645 315.0 350.0 REQUIREMENTS: Qualification required. Construction details: See table I. 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.
9、 Temperature rating 150 C (302 F) (max.) conductor temperature Voltage rating 600 volts (root mean square) at sea level Accelerated aging Non-blocked Oven temperature, 3002 C (5723.6 F) for 6 hours Water-blocked Oven temperature, 2502 C (4823.6 F) for 6 hours Blocking 1502 C (3023.6 F) Flammability
10、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 (100% test) Primary insulation Impulse test - 6.0 kV (peak) or 3 kHz spark test - 1.5kV root mean square Component wire I
11、mpulse test - 8.0 kV (peak) or 3 kHz spark test - 5.5kV root mean square Insulation resistance 5000 megohms for 1000 feet (min.) Life cycle Non-blocked Oven temperature, 2002 C (3923.6 F) for 168 hours Water-blocked Oven temperature, 2002 C (3923.6 F) for 120 hours Physical properties of primary ins
12、ulation Tensile strength 2500 lb/in2(min.) Elongation 150 percent (min.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24640/11E 3 Shrinkage Non-blocked 0.125 inch (max.) at 3002 C (5723.6 F) Water-blocked 0.125 inch (max.) at 2502 C (4823.
13、6 F) Surface resistance 500 megohms inches (min.), initial and final readings Thermal shock Oven temperature, 1502 C (3023.6 F) Maximum change in measurement 0.060 inch Wet dielectric test 2500 volts (root mean square) Wrap test Mandrel wrap test required INSPECTION: Basic Electricals: Conductor res
14、istance (ohms/1000 feet at 25 C, max.) 6.67 Voltage withstand (volts, root mean square, min.) Conductor to conductor and shield 1000 Component shield to shield 200 Insulation resistance (megohms/1000 feet, min.) Conductor to conductor 2500 Shield to shield (component shield only) 100 Shield to shiel
15、d (component shield to overall shield) Not applicable Conductor and shield continuity No failure Jacket flaws No failure Group A: Visual and dimensional No failure Capacitance Mutual capacitance (at 1 MHz, picofarads/foot (pF/ft), max.) 55 Capacitance unbalance (percent, max.) 15 Characteristic impe
16、dance (at 1 MHz, ohms) Not applicable Watertightness (type 3XSW only) No failure (see table IX of MIL-DTL-24640 for limits of water leakage) Weight No failureGroup B: Cold bending No failure Drip (type 3XSW only) No failure Cross-link proof test (percent, max.) Provided by IHSNot for ResaleNo reprod
17、uction or networking permitted without license from IHS-,-,-MIL-DTL-24640/11E 4 Jacket 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 appl
18、icable Group C: Physicals (aged), air oven Jacket Tensile strength (percent of unaged, 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
19、.) 30 Cable sealant removability (type 3XSW only) No failure Shrinkage No failure Surface transfer impedance Milliohms per meter (max.) Not applicable EMP response (dB, min.) Not applicable Group D: Flame propagation No failure Qualification Inspection: Qualification inspection shall include basic e
20、lectricals; 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 Provided by IHSNot for ResaleNo reproduction or networking permitted without l
21、icense from IHS-,-,-MIL-DTL-24640/11E 5 Immersion (jacket) Tensile strength (percent of unaged, min.) 50 Elongation (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
22、 Weathering (jacket) No failure Fungus resistance No failure Abrasion resistance No failure Gas flame (3 hour) Not applicable Component wire No failure UNIT ORDERING LENGTHS: Type and size Feet (nominal) All types 500 CHANGES FROM PREVIOUS ISSUE: Marginal notations are not used in this revision to i
23、dentify changes with respect to the previous issue due to the extent of the changes. Custodians: Preparing Activity:Army MI Navy SH Navy SH (Project 6145-2009-079) Review Activities: Army AR, 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-,-,-
