1、Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data that may improve this document should be sent to DAMI_STANDARDIZATIONconus.army.mil or U.S. Army RDECOM, Tank Automotive Research, Development and Engineering Center, ATTN: RDTA-EN/STND/TRANS MS #268, 6501
2、E. 11 Mile Road, Warren, MI 48397-5000. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.daps.dla.mil/online/. AMC N/A FSC 5930 INCH-POUND A-A-52482B April 14, 2010 SUPERSEDING A-A-52482A July 5, 1
3、995 COMMERCIAL ITEM DESCRIPTION SWITCH, ROTARY: STOPLIGHT, VEHICULAR, MECHANICALLY ACTUATED, 28 VOLT DC The General Services Administration has authorized the use of this commercial item description (CID) as a replacement for MS75064C(AT) for all federal agencies. 1. SCOPE. This CID covers a 28 volt
4、 (V) direct current (dc) single-pole, single-throw waterproof rotary switch intended for use with a stoplight in tactical vehicles operating on a nominal 24 Vdc electrical system. 2. SALIENT CHARACTERISTICS 2.1 Materials. Unless otherwise specified herein, materials used shall be in accordance with
5、the manufacturers drawings/specifications. The use of recovered material made in compliance with the regulatory requirements is acceptable providing that all requirements of this CID are met (see note d). 2.1.1 Dissimilar metals. Except where necessary to couple an electrical circuit, contact betwee
6、n dissimilar metals which would encourage galvanic action shall be avoided. 2.1.2 Plastic. The switch shall show no deteriorating effect during shipping, storage and usage, such as, cracking, chipping, or blistering. 2.1.3 Locking devices. Lockwashers, self-locking nuts, or other approved locking de
7、vices shall be incorporated where required to prevent loosening of components. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52482B 2 2.2 Design and configuration. Unless otherwise specified in figure 1, the design and configuration of the swit
8、ch shall be in accordance with the manufacturers drawings. Notes: 1. Dimensions are in inches, unless otherwise specified, tolerances are 1/32 on fractions, .005 on decimals, 2 on angles. Figure 1. Design and configuration. 2.3 Performance. The switch shall perform as specified here-in when energize
9、d at a rated load of 28 Vdc. 2.3.1 Voltage drop. The voltage drop between terminals shall be no greater than 150 millivolts when energized by a 28 Vdc source. 2.3.2 Overload. To determine the overload, the switch shall be energized by a 28 Vdc source and connected to loads 40 percent greater than ra
10、ted (lamp, resistive) loads. The switch shall be operated for 100 cycles at each specified load. For lamp loads, the load cycle shall be 1 0.1 second “on“ and 5 0.1 seconds “off“ (10 cycles per minute). After cycle is completed, the switch shall meet the requirements of 2.3.1. Provided by IHSNot for
11、 ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52482B 3 2.3.3 Endurance. The voltage drop shall be no greater than 500 millivolts after 50,000 cycles of operations during which the switch is energized by a 28 Vdc source and connected to the rated loads specified in 2
12、.3.2. The torque required to operate the switch shall be no less than 30 (max 70, see 2.3.5) ounce-inches. The switch shall show no evidence of malfunction during the test. 2.3.4 Dielectric strength. No burning, charring, loosening, arcing or other damage should be evidenced when applying a 1,000 V
13、root mean square (rms) voltage at a frequency of 60 cycles per second with the switch lever in each of its “on“ and “off“ positions. The applied voltage shall be increased from zero to the specified value at a rate of 400 V per second and shall be maintained between insulated terminals and ground fo
14、r one minute on each application. 2.3.5 Operating torque. The average of five measurements of the torque applied to move the switch for each direction of movement from each position should not be less than 30 nor more than 70 ounce-inches. 2.3.6 Maximum torque. With the lever turned to each extreme
15、position a torque load of 3 foot-pounds is applied to the switch. This load shall be applied gradually 5 times for each lever position and held for at least 10 seconds. No breakage, distortion or loosening of parts of the switch shall be evidenced. Subsequent to test, the switch shall meet the requi
16、rements of 2.3.1. 2.3.7 Terminal strength. The switch shall not evidence any damage, distortion or loosening of parts after applying for 10 seconds each a force of 25 pounds at the base of all terminals in four directions perpendicular to the longitude centerline of the terminals at 90E intervals, a
17、nd a 25 pounds pull along the terminal axes centerline. More so, 2.3.1 and 2.3.4 requirements shall be maintained. 2.3.8 Shock resistance. The switch shall evidence no mechanical or electrical malfunction (opening or closing of circuit) during and after exposure to 3 sawtooth shock pulses, each of 5
18、0 gravities (g) peak amplitude for 7 milliseconds (ms) duration, in both directions of each of the three orthogonal axes for a total of 18 shock pulses. One axis shall be through, or parallel to, the plane of contact movement and the lever when in “off“ position. The switch shall subsequently meet t
19、he requirements of 2.3.1 2.3.9 Vibration resistance. The switch shall evidence no electrical or mechanical malfunction when subjected to vibration for one hour along each of three mutually perpendicular axes, one of which shall be through or parallel to the switch shaft; the vibration shall be an ha
20、rmonic motion having an amplitude of 0.03 inch (0.06 inch total excursion) in a frequency sweep from 10 to 55 and return to 10 Hertz (Hz) in one minute. The switch shall subsequently meet the requirements of 2.3.1, 2.3.5 and 2.3.6. 2.4 Environmental conditions. Provided by IHSNot for ResaleNo reprod
21、uction or networking permitted without license from IHS-,-,-A-A-52482B 4 2.4.1 Salt spray resistance. The switch shall meet the requirements of 2.3.1 during and after exposure to a fog of atomized salt water of 5 percent salt solution for 200 hours at 95 +2/-3 degrees Fahrenheit (F). 2.4.2 Sand and
22、dust resistance. The switch shall meet the requirements of sc c.1 after exposure to sand and dust in an air velocity of 2500 500 feet per minute with humidity not exceeding 30% for 6 hours at 77F, and 6 hours at 160F. 2.4.3 Fungus resistance. The switch shall meet the requirements of 2.3.1, 2.3.2, 2
23、.3.4, and 2.3.5 after exposure to fungus growth in air incubation cabinet for 90 days at a temperature between 75 and 85F and a relative humidity between 93 and 100 percent. 2.4.4 Waterproofness. The switch shall be mechanically and electrically operable during and after submersion in saline solutio
24、n for 30 minutes at full rated current and voltage. No poor seals, leakage or other failure shall be evidenced. The switch shall subsequently meet the requirements of 2.3.1, 2.3.2, 2.3.4, and 2.3.5. 2.4.5 Temperature resistance. The switch energized by a 28 V dc source shall be tested at extremes of
25、 low and high temperature; it shall be operated through its entire range 1000 times. For lamp loads, the load cycle shall be 1 0.1 second “on“ and 5 0.1 seconds “off“ (10 cycles per minute). The switch shall subsequently meet the requirements of 2.3.1, 2.3.3 and 2.3.5. 2.4.6 Low temperature resistan
26、ce. The switch shall be placed in a cold chamber at -65 5F and conditioned for 24 hours prior to testing, then, with the chamber temperature constant at -65 5F the switch shall be operated and tested in accordance with 2.4.5. There shall be no evidence of degradation of electrical and mechanical per
27、formance. The operational torque shall not exceed by more than 40% of the operational torque of 2.3.5. 2.4.7 High temperature resistance. The switch shall be connected, conditioned and tested in accordance with 2.4.6 except that the temperature shall be 165 5F. 2.5 Finish. Unless otherwise specified
28、 (see note b), the finish shall be as specified herein. 2.5.1 Painting. Cleaning, pretreatment, priming, and painting shall conform to an appropriate CARC paint system selected from Drawing 12369000. Color of paint top coat shall be green 383, 34094. 2.5.2 Plating. Plating shall be applied after all
29、 basic metal heat treatments and mechanical operations have been completed. Silver plating shall conform to ASTM B700. Chromium plating shall conform to SAE-AMS-2460. 2.6 Identification marking. Identification marking shall be permanent and legible and shall include, as a minimum, the part identific
30、ation number (PIN) A52482-1 and the manufacturers CAGE code and part number (see 5.2). Identification and marking shall be accomplished without adversely affecting the acceptability and function of the finished product. Provided by IHSNot for ResaleNo reproduction or networking permitted without lic
31、ense from IHS-,-,-A-A-52482B 5 3. REGULATORY REQUIREMENTS 3.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the operational and maint
32、enance requirements, and promotes economically advantageous life cycle costs. The offeror/contractor is encouraged to use recovered materials to the maximum extent practicable, in accordance with paragraph 23.403 of the Federal Acquisition Regulation (FAR). 4. PRODUCT CONFORMANCE PROVISIONS. 4.1 Res
33、ponsibility for inspection. The contractor is responsible for the performance of all inspections (examinations and tests). 4.2 Contractor certification. The contractor shall certify and maintain substantiating evidence that the product offered meets the salient characteristics of this commercial ite
34、m description and that the product conforms to the producers own drawings, specifications, workmanship standards, and quality assurance practices. Items with known defects shall not be submitted for Government acceptance. The Government reserves the right to require proof of such conformance prior t
35、o the first delivery and thereafter as may be otherwise provided for under the provisions of the contract. 5. PACKAGING. Preservation, packaging, packing, labeling, and marking for the desired level shall be as specified in the contract (see note b). 6. NOTES. (This section contains information of a
36、 general or explanatory nature that may be helpful, but is not mandatory.) 6.1 Addresses for obtaining copies of referenced documents. 6.1.1 Government specifications and standards. Copies of MIL-DTL-13486 “Cable, Special Purpose, Electrical“ and A-A-52536 “Contact, Electrical No. 12, 14, and 16 A.W
37、.G.“ are available from the Document Automation and Production Service, Building 4/D, 700 Robbins Avenue, Philadelphia, PA 1911-5094 or website https:/assist.daps.dla.mil/quicksearch/. 6.1.2 Other Government documents. Copies of Army Drawing 12369000 “Chemical Agent Resistant Coatings (CARC)” are av
38、ailable from DAMI_Standardizationconus.army.mil or U.S. Army RDECOM, Tank Automotive Research, Development, and Engineering Center, ATTN: RDTA-EN/STND/TRANS, MS #268, 6501 E 11 Mile Road, Warren, MI 48397-5000. Copies of the FAR may be obtained from the Superintendent of Documents, P.O. Box 371954,
39、Pittsburgh, PA 15250-7954 or website https:/www.acquisition.gov/far/. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52482B 6 6.1.3 Non-Government documents. Copies of ASTM-B700 “Standard Specification for Electrodeposited Coatings of Silver for
40、 Engineering Use” are available from American Society for Testing Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or http:/www.astm.org/. Copies of SAE-AMS-2460 “Plating, Chromium” are available from Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, PA 15096-000
41、1 or website http:/www.sae.org/. 6.2 Ordering data. Acquisition documents must specify the following: a. Title, number, and date of this CID. b. Issue of the DODISS to be cited in the solicitation, and if required, the specific issue of individual documents referenced. c. PIN number and quantity req
42、uired. d. If finish is other than as specified. e. Selection of applicable level and packaging requirements. 6.3 Cross-reference data. Switches conforming to this CID are interchangeable/substitutable with switches conforming to MS75064C(AT), dated 27 August 1980. 6.4 Key words. Electrical Component
43、s Tactical Vehicles Waterproof Single Pole Single Throw MILITARY INTERESTS: CIVIL AGENCY COORDINATING ACTIVITY: GSA-FAS Custodian: Army - AT Preparing Activity: Army - AT Review Activities: DLA - CC (Project 5930-2010-013) NOTE: The activities listed above were interested in this document as of the
44、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/online/. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
