1、- MIL-G-12b04H 27 W 7797706 0187505 3 W MIL-G-12604H 29 June 1987 SUPERSEDING MIL-G-12604G 1 October 1982 MILITARY SPECIFICATION GENERATOR, ENGINE ACCESSORY: DIRECT-CURRENT 28 VOLT, 25 AMPERE This specification is approved for use by all Departments and Agencies of the Department of Defense. ”*? 1.
2、SCOPE 1.1 Scope. This specification covers the requirements and inspections of one type of 28 volt (V) direct current (dc), 25 ampere generator which is waterproof and may be direct driven or belt driven. 1.2 Classification. The type covered by this specification shall be one of the generators liste
3、d below as specified (see 6.2): Part Numbers 7355736 a I I l I t I l I I t l O I t I I! 10950808 Item - Generator. D.C. 28 Volt, 25 Amr, Generator; D.C. 28 Volt; 25 Amp Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document s
4、hould be addressed to: US Army Tank-Automotive Command, ATTN: AMSTA-GDS, Warren, MI 48397-5000, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document, or by letter. AMSC NIA FSC 2920 DISTRIBUTION STATEMENT A. Approved for publi
5、c release; distribution is unlimited. / . i THIS DOCUMENT CONTAINS !i PAGES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_- MIL-G-12b04H 324 797906 OLSCOb 5 MIL-G-12604H 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, and
6、standards, The following specifications and standards form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplem
7、ent thereto, cited in the solicitation. SPECIFICATIONS FEDERAL QQ-P-4 16 TT-C-490 TT-E-489 TT-P-636 TT-P-1757 MILITARY MIL-P-5 14 MIL-G-3056 MIL-0-5541 MIL-A-8625 MIL-F-13927 MIL-C-81562 STANDARDS FEDERAL FED-STD-H28/2 MILITARY MIL-STD-105 MIL-STD-130 - Plating, Cadmium (Electrodeposited). - Cleanin
8、g Methods for Ferrous Surfaces and Pretreatments for Organic Coatings. - Enamel, Alkyd, Gloss (for Exterior and Interior Surfaces). - Primer Coating, Alkyd, Wood and Ferrous Metal. - Primer Coating, Zinc Chromate, Low Moisture Sensitivity. - Plates, Identification, Instruction and - Gasoline, Automo
9、tive, Combat. - Chemical Conversion Coatings on Aluminum - Anodic Coatings, for Aluminum and Aluminum - Fungus Resistance Test; Automotive - Coatings, Cadmium, Tin-Cadmium, and Zinc Marking, Blank. and Aluminum Alloys. Alloys Components. (Mechanically Deposited). - Screw-Thread Standards for Federal
10、 Services, Section 2 Unified Inch Screw Threads - UN and UNR Thread Forms. - Sampling Procedures and Tables for - Identification Marking of US Military Inspection by Attributes. Property. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-G-3260H
11、 27 7979706 0387507 7 MIL-G-12604H MIL-STD-202 - Test Methods for Electronic and Electrical Component Parts. MIL-STD-461 - Electromagnetic Emission and Susceptibility Requirements for the Control of Electromagnetic Interference. Characteristics, Measurement of. MIL-STD-462 - Electromagnetic Interfer
12、ence MIL-STD-889 - Dissimilar Metals. MIL-STD-1184 - Electrical Components for Automotive MIL-STD-45662 - Calibration Systems Requirements. Vehicles; Waterproofness Tests. 2.1.2 Government drawings. The following Government drawings form a part of this specification to the extent specified herein. U
13、nless otherwise specified, the issues shall be those in effect on the date of the solicitation. DRAWINGS ARMY 7355736 10950808 - Generator, D.C., 28 Volt (25 Amperes). - Generator, D.C, 28 Volt (25 Amperes). (Copies of specifications, standards, handbooks, drawings, publications, and other Governmen
14、t documents required by the contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.2 Other publications. The following document(s) form a part of this specification to the extent specified herein.
15、Unless otherwise specified, the issues of the documents which are DOD adopted shall be those listed in the issue of the DODISS specified in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS shall be the issue of the nongovernment documents which is curren
16、t on the date of the solicitation. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM B633 - Electrodepostited Coatings of Zinc on Iron and Steel. (Application for copies should be addressed to American Society for Testng and Materials, 1916 Race Street, Philadelphia, PA, 19103.) (Nongovernment
17、standards and other publications are normally available from the organizations which prepare or which distribute the documents. These documents also may be available in or through libraries or other informational services.) 3 Provided by IHSNot for ResaleNo reproduction or networking permitted witho
18、ut license from IHS-,-,-MIL-G-12604H 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein (except for associated detail specifications, specification sheets or MS standards), the text of this specification shall take precedence, N
19、othing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article, Unless otherwise specified (see 6.2), the contractor shall furnish the first completed generator which shall be subjected to first
20、article inspection (see 4.4). marked with identifying information shall be representative of the unit to be furnished to the Government. Government shall conform to these samples in all of their pertinent physical and performance attributes. First article inspection samples, properly All subsequent
21、generators delivered to the 3.2 Materials. Materials shall be as specified herein and in referenced specifications and drawings. Materials shall be free of defects and imperfections that might affect the serviceability and appearance of the einished product (see 4.8.1, 4.8.2 and 6.5). 3.2.1 Qualifie
22、d products. When a part or component is specified to conform to a specification having a Qualified Products List (QPL), the contractor shall maintain documentation of item acquisition from such QPL. The documentation shall include the QPL date and identification of the supplier, purchase order, and
23、quantity (see 4.8.1). 3.2.2 Dissimilar metals. Dissimilar metals shall be protected from galvanic corrosion in accordance with requirements of MIL-STD-889 (see 4.8.1). 3.2.3 Recycled, virgin and reclaimed materials. There are no requirements for the exclusive use of virgin materials; however, all ma
24、terials shall be new and unused. The use of recycled or reclaimed (recovered) materials is acceptable provided that all other requirements of this specification are met and that the suppliers employees are not exposed to undue hazards from the recovered materials (see 6.5). 3.3 Design and constructi
25、on. Generator assemblies shall conform to Drawing 7355736 or 10950808 and applicable standards and specifications (see 4.8.1 and 4.8.2). 3.3.1 Interchangeability. All generator assemblies and all component parts shall be physically and functionally interchangeable with all other component parts of s
26、ame part number previously furnished under this specif icaton (see 4. 8.2) . 3.3.2 Standard parts. Military standard parts shall be incorporated wherever applicable. Commercial standard parts may be used, provided they are interchangeable with military standard parts without modification (see 4.8. 2
27、) 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-32b04H 27 W 77777Ob 0387507 O W MIL-G-12604H 3.3.3 Threaded parts. Screw threads of the form, number per inch and class specified on the applicable drawing or military standard shall be in acc
28、ordance with FED-STD-H28/2 (see 4.8.1 and 4.8.2). 3.3.4 Polarity. Generator shall operate within a negatively grounded electrical circuit (see 4.8.1 and 4.8.2). 3.4 Performance. 3.4.1 Output. The generator shall meet requirements specified on output performance curve of figure 1 (see 4.8.3 and 6.4).
29、 3.4.2 Endurance. The generator shall deliver rated output for 2000 hours. During this time, it shall require no servicing or replacement of parts, except for one change of brushes. The generator shall subsequently conform to 3.4.1 (see 4.8.4). 3.4.3 Overspeed. When operated at 10 O00 revolutions pe
30、r minute (rpm) for 1 minute; the generator shall evidence nothrown solder, thrown impregnating compound, damaged insulation, raised armature windings, nor raised commutator bars (see 4.8.5). 3.4.4 Dielectric strength. After application of 500 V root-mean-square (rms) at 60 Hertz (Hz) to armature and
31、 field terminals, with the ground brush raised off the commutator and with the field ground terminal disconnected; the generator shall evidence no loosening, cracking, charring, burning or smoking of insulation, or reduction in dielectric strength (see 4.8.6). 3.4.5 Fire hazard. Generator operation
32、shall not cause the explosive mixture of surrounding fuel and air to ignite (see 4.8.7). 3.4.6 Environment. 3.4.6.1 High temperature. During 4 hours of operation at rated output, in 160 + 5 degrees Fahrenheit (OF) ambient air temperature, the generator frame temperature shall not exceed 320F. eviden
33、ce no thrown soler, thrown impregnating compound, damaged insulation, raised armature windings nor raised commutator bars (see 4.8.8). Further, the generator shall 3.4.6.1.1 Overload. The generator shall withstand operation at 125 percent (X) of rated output for 10 minutes, applied immediately after
34、 operation as specified in 3.4.6.1, and while at that same temperature. The generator shall subsequently conform to 3.4.1 (see 4.8.8.1). 3.4.6.2 Low temperature. After a cold soak for 24 hours, and 4 hours of operation producing rated output at minus 65“F, the generator shall evidence no thrown sold
35、er, thrown impregnating compound, damaged insulation, raised armature windings, or raised commutator bars (see 4.8.9). 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-35 30 25 A M 20 P E R E IS S IO 5 - flIL-G-LZhOLtH 24 777440b 0384530 7 MIL-G-126
36、04H O O i000 2060 3W WOO 5ooo 6000 7OW 8000 9OO CURRENT vs SPEED AT 28.5 20.1 VOLTS FIGURE I - TYPICAL OTPUT PERFORMANCE CURVE 6 t U Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- NIL-G-L2604H 27 m 7777906 OLA7511 7 MIL-G-12604H 3.4.6.3 Shock resis
37、tance. The generator shall be tested as specified in test condition A, method 213 of MI1-STD-202. The generator shall then be operated as specified in 6.1 and shall conform to 3.4.1 (see 4.8.10). 3.4.6.4 Vibration resistance. The generator shall be tested as specified in method 201 of MIL-STD-202, e
38、xcept the time of test shall be 72 hours, and the generator shall operate as a motor for 1-1/2 of every 2 hours tested. The generator shall then be operated as specified in 6.1 and shall conform to 3.4.1 (see 4.8.11). 3.4.6.5 Waterproofness. The generator interior shall remain dry, during and after
39、total submersion in a salt water solution. The generator shall then operate as specified in 6.1 and shall conform to 3.4.1 (see 4.8.12). 3.4.6.5.1 Reduced waterproofness. For quality conformance testing, the generator shall be tested as specified in procedure 5 of MIL-STD-1184 (see 4.8.12.1) . 3.4.6
40、.6 Fungus resistance. The generator shall be tested as specified in method A, class 2 of MIL-F-13927. Before and after testing, the generator shall operate as specified in 6.1 and shall conform to 3.4.1 (see 4.8.13). 3.4.6.7 Corrosion resistance. The generator shall be tested as specified in method
41、101 of MIL-STD-202, except length of test shall be 200 hours. After testing, the generator shall operate as specified in 6.1 and shall conform to 3.41 (see 4.8.14). 3.4.6.8 Sand and dust. The generator shall be subjected to test method 110 of MIL-STD-202, and shall subsequently conform to 3.4.1 (see
42、 4.8.15). 3.4.6.9 Electromagnetic interference. The generator shall conform to electromagnetic interference suppression requirements of MIL-STD-461 for tactical vehicles (see 4.8.16). 3.4.7 Finish. The electrical receptacle assembly shall be cadmium plated. Other exterior surfaces of the generator a
43、ssembly shall be painted or zinc plated, except for the shaft extension. be painted or zinc plated. No paint shall be applied to mating surfaces on frame or on ends of generator. class 2, type II. Zinc plating shall conform to ASTM B633, class 2, type II, or MIL-C-81562, class 2, type II (see 4.8.1
44、and 4.8.2). Screws and other parts shall Cadmium plating shall conform to QQ-P-416, 3.4.7.1 Ferrous surfaces. Ferrous metal surfaces shall be cleaned in accordance with the applicable method specified in TT-C-490. surfaces shall be treated in accordance with type I or type III of TT-C-490. Exterior
45、surfaces shall be given one coat of primer conforming to TT-P-636, 0.75 to 1.25 mil thick, or TT-P-1757, 0.40 to 0.60 mil thick. Finish coat shall be black gloss enamel conforming to TT-E-489, 0.75 to 1.25 mil thick. Cleaned 7 Provided by IHSNot for ResaleNo reproduction or networking permitted with
46、out license from IHS-,-,-MIL-G-LEb04H 24 a 9494706 OLB9512 O MIL-G-12604H 3.4.7.2 Aluminum alloy surfaces. Aluminum surfaces shall be cleaned and treated in accordance with MIL-C-5541, or anodized in accordance with MIL-A-8625. to TT-P-1757, 0.40 to 0.60 mil thick. Finish coat shall be black gloss e
47、namel conforming to TT-E-489, 0,75 to 1.25 mil thick. Exterior surfaces shall be given one coat of primer conforming 3.4,7,3 Zinc and cadmium surfaces. When specified (see 6.2), exterior zinc and cadmium surfaces shall be painted with one coat of primer conforming to TT-P-1757, 0.40 to 0.60 mil thic
48、k. Finish coat shall be black gloss enamel conforming to TT-E-489, 0.75 to 1.25 mil thick. 3.5 Identification and marking (see 4,8.1 and 4,8.2). 3.5.1 Marking. Marking for identification shall be in accordance with MIL-STD-130. 3.5.2 Identification. A nameplate shall be affixed to the exterior of th
49、e generator frame in a location specified on applicable drawings or, if not specified, in a conspicuous place. Nameplates shall conform to MIL-P-514 and shall include the following minimum information: Generator, 28 Volts DC. Amperes, . Military part number. National stock number, Manufacturers serial number. Manufacturers identification. Manufacturers part number. us 3.5.3 Permanent mark. When specified (see 6.2), the militar
