1、AMSC N/A FSC 6145 INCH-POUND MIL-DTL-24640/22E 8 November 2011 SUPERSEDING MIL-DTL-24640/22D 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRIC, -20 TO +105 C, 600 VOLTS, LIGHTWEIGHT, SEVEN-CONDUCTOR, LOW POWER, TYPE 7XW This specification is approved for use by all Departments and Agencies o
2、f the Department of Defense. The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-DTL-24640. Construction (Watertight with Circuit Integrity) First - Copper conductor, coated or uncoated in accordance with ASTM B8, 7 strands in accordance with
3、 table I for the applicable type. Second - Mica glass tape insulation 0.00290.0002 inch (50 percent overlap maximum and minimum overlap of 45 percent). Conformance testing shall be in accordance with MIL-DTL-81381 prior to cabling. Third - Opaque-pigmented polyimide tape 0.001 inch (50 percent overl
4、ap minimum). Fourth - Opaque-pigmented polyimide tape 0.001 inch with 0.0001 inch Fluorinated Ethylene Propylene (FEP) (50 percent overlap minimum). Fifth - Modified aromatic polyimide resin coating 0.0005 inch minimum (0.001 inch nominal). Identification codes applied using Method 1 or 3. Sixth - S
5、even component wires shall be cabled together. Cabling shall be in sequence starting with number 1 from center outward. Fillers may be used, as necessary, to form a round cable. Seventh - Optional binder tape. Eighth - Cross-linked polyolefin jacket (see table I for thickness). NOTE: Manufacturers i
6、dentification tape or thread is required (see 3.7.3). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24640/22E 2 TABLE I. Construction details. PIN M24640/22 Type number AWG size Component wire diameter (inch) Jacket thickness (inch) (min.)
7、Cable diameter (inch) Cable weight (pounds per 1000 feet) (max.) Conductor resistance per 1000 feet (ohms) (min.) (max.) (min.) (max.) -01UN -02UN 7XW-3 7XW-4 16 14 0.075 0.091 0.081 0.097 0.038 0.041 0.315 0.374 0.339 0.404 110.0 162.0 4.35 2.88 REQUIREMENTS: Qualification required. Construction de
8、tails: See table I. Component wire: For polyimide tape constructions, the following additional tests shall be applicable in accordance with MIL-DTL-81381. Temperature rating 150 C (302 F) (max.) conductor temperature Voltage rating 600 volts (root mean square) at sea level Blocking Oven temperature,
9、 1502 C (3923.6 F) no sticking of conductors Flammability 3 seconds (max.) after flame 3.0 inches (max.) flame travel No flaming of tissue paper Humidity resistance 5 megohms for 1000 feet (min.) insulation resistance after humidity exposure Impulse dielectric test 8.0 kV, 100 percent impulse test I
10、nsulation resistance 2500 megohms for 1000 feet (min.) Polyimide cure test No cracking Shrinkage 0.062 inch (max.) at 180 C Surface resistance 5 megohms inches (min.), initial and final readings Thermal shock Oven temperature, 1502 C (3023.6 F) Maximum change in measurement 0.031 inch Wet dielectric
11、 test 2500 volts (root mean square) INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) See table I Voltage withstand (volts, root mean square, min.) Conductor to conductor 2000 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I
12、HS-,-,-MIL-DTL-24640/22E 3 Conductor to shield Not applicable Shield to shield Not applicable Insulation resistance (megohms/1000 feet, min.) 2500 Conductor and shield continuity No failure Jacket flaws No failure Group A: Visual and dimensional No failure Capacitance Mutual capacitance (at 1 MHz, p
13、icofarads/foot (pF/ft), max.) Not applicable Capacitance unbalance (percent, max.) Not applicable 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 f
14、ailure Cross-link proof test (percent, max.) 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) No failure Group C: Physicals (aged), air o
15、ven Jacket Tensile strength (percent of unaged, min.) 60 Elongation (percent of unaged, min.) 60 Permanence of printing 25 (conductor insulation, cycles, Method 1 only, min.) Permanence of printing (jacket, cycles, min.) 125 Provided by IHSNot for ResaleNo reproduction or networking permitted withou
16、t license from IHS-,-,-MIL-DTL-24640/22E 4 Heat distortion (percent of unaged, max.) 30 Cable sealant removability No failure Shrinkage No failureSurface transfer impedance Milliohms per meter (max.) Not applicable EMP response (dB, min.) Not applicable Group D: Flame propagation No failure Qualific
17、ation Inspection: Qualification inspection shall include 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 (jac
18、ket) 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 Weathering (jacket) No failure Fungus resistance No f
19、ailure Abrasion resistance No failure Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24640/22E 5 Gas flame (3 hour) No failure Component wire No failure UNIT ORDERING LENGTHS: Type and size Feet (nominal) 7XW-3, 7XW-4 500 CHANGES FROM PREVIO
20、US 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 6145-2009-097) Review Activities: Army AR, AV, CR, CR4 Navy CG, EC DLA CC NOTE: The acti
21、vities 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-,-,-
