1、Jt 23 -13 MIL-M-28903 (MC) 12 December 1968 SUPERSEDING See Section 6. MILITARY SPECIFICATION MOTOR-GENERATOR: 100 KW 1. SCOPE 1.1 This specification covers motor-generators for convert- ing 60-hertz(Hz) power to 400-Hz pwer. The motor input current is to be 3 phase, 416 volt(v), 60 Hz, 4 wire, and
2、the alternator output to be 100 kilowatts (kw) , 0.8 power factor (pf) lagging, 400 Hz, 3 phase, 4 wire, 120/208 v, reconnectable to 240/416 V. 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on the date of invitation for bids or request for proposal, form a part of the sp
3、ecification to the extent specified herein. SPEC1 FICATIONS FEDERAL CC-M-641 FF-B-171 QQ-P-416 WW-P-404 28-R-765 PPP-T-97 MILITARY MIL-C-104 MIL-V-173 MIL-P-514 - Motor, Alternating Current (Integral Horse- - Bearings, Ball, Annular (General Purpose) - Plating, Cadmium (Electrodeposited) . - Pipe, S
4、teel (Seamless and Welded, Black - Rubber, Silicone: Low- and High-Temperature - Tape, Pressure-Sensitive Adhesive, Filament power, 200 HP and Smaller). and Zinc Coated) (Galvanized) . and Tear Resistant. Reinforced. - Crate, Wood; Lumber and Plywood Sheathed, Nailed and Bolted. - Varnish, Moi sture
5、-and-Fungus-Resi stant (for the Treatment of Communication, Electronic, and Associated Electrical Equipnent). - Plate, Identification, Instruction and Marking, Blank. FSC 6125 Licensed by Information Handling ServicesMIL-M-2703 bL 3799906 0093229 MIL-M-28903 (MC) MIL-1-63 1 MIL-T-704 MIL-E-917 MIL-1
6、-983 MIL-C-34 3 2 MIL-1-3505 MIL-S-3950 MIL-M-397 1 MIL-C-5015 MIL-W-5086 MIL-W-5088 MIL-F-5591 MIL-R-6106 MIL-S-6807 MIL-B-7 883 MIL-A-8421 MIL-W-8611 MIL-S-8805 . MIL-M-10304 MIL-R-11461 MIL-P-12742 MIL-E-16298 MIL-G-23827 MIL-1-24092 - Insulation, Electrical, Synthetic-Resin Composition, Nonrigid
7、. - Treatment and Painting of Materiel. - Electric Power Equipment, Basic Requirements for (Naval Shipboard Use) . - Interior Communication Equipment, Naval Shipboard; Basic Design Requirements for. - Cable and Wire, Electrical (Power and Con- trol; Flexible and Extra Flexible, 300 and 600 Volts) .
8、- Insulation, Sheet and Tape, Electrical, Coil and Slot, High Temperature. - Switch, Toggle, General Specification for. - Meter, Time Totalizing, Non-Hermetically Sealed, Electrical, General Specification for. - Wire, Electric, Hook-Up and Interconnecting, Polyvinyl Chloride-Insulated, Copper or Cop
9、per Alloy Conductor. - Wiring, Aircraft, Installation of. - Fasteners; Panel. - Relays, Electric, Aerospace, General Speci- fication for. - Switch, Rotary, Selector Power, General Specification for. - Brazing of Steels, Copper, Copper Alloys, Nickel Alloys, Aluminum and Aluminum Alloys. - Air Transp
10、ortability Requirements, General Specification for. - Welding, Metal Arc and Gas, Steels, and Corrosion and Heat Resistant Alloys, Process for. - Switches and Switch Assemblies, Sensitive and Push (Snap Action) , General Speci- fication for. - Meter, Electrical Indicating, Panel Type, Ruggedized, Ge
11、neral Specification for. - Rod, Ground (With Attachments) . - Primer Coating, Phenolic, Water Immersible. - Electric Machines Having Rotating Parts and Associated Repair Parts: Packaging of. - Grease, Aircraft and Instrument, Gear and Actuator Screw. - Insulating Varnish, Electrical, Impregnating. -
12、 Connectors, Electric, IIAN“ Type. 2 Licensed by Information Handling ServicesMIL-M-28903 (MC) STANDARDS FEDERAL FED-STD-595 - Color. MILITARY MIL-SID-15 MIL-STD-105 MIL-STD-108 MIL-SID-129 MIL-STD-130 MIL-STD-195 MIL-STD- 27 8 MIL-STD-.Q 54 MIL-STD-461 MIL-STD-462 MIL-SID-7 O 5 MS35446 MS35823 - Gr
13、aphic Symbols for Electrical and Elec- tronics Diagrams. - Sampling Procedures and Tables for Inspec- tion by Attributes. - Definition of and Basic Requirement for Enclosure for Electric and Electronic Equipment . .Property . Assemblies. and Pressure Vessels for Ships of the United States Navy. Equi
14、pments. Requirements for Equipment. Measurement of. Tests and Instructions. One Hole. 0.125 Pin Dia. - Marking for Shipment and Storage. - Identification Marking of US Military - Marking of Connections for Electrical - Welding and Inspection of Machinery, Piping, - Standard General Requirements for
15、Electronic - Electromagnetic Interference Characteristics - Electromagnetic Interference Characteristics, - Generator Sets, Engine-Driven, Methods of - Terminal, Lug, Colder Type, Copper Tubing, - Hinge, Continuous (piano), 0.050 Thickness, (Copies of specifications and standards required by supplie
16、rs in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 2.2 Other publications. The following documents form a mrt of this specification to the extent specified herein. nless otherwiie indicated, the issue in eff
17、ect on date of invitation for bids or request for proposal shall apply. 3 Licensed by Information Handling ServicesMIL-M-28703 bL = 777770b 007L23L b = MIL-M-28903 (MC) NATIONAL BUREAU OF STANDARDS Handbook H28 - Screw-Thread Standards for Federal Services. (Application for copies should be addresse
18、d to the Super- intendent of Documents, Government Printing Office, Washington, D. C. 20402.) AMERICAN COCIETY FOR TESTING AND MATERIALS A7 - Steel for Bridges and Buildings. A373 - Structural Steel for Welding. (Application for copies should be addressed to the American Society for Testing and Mate
19、rials, 1916 Race Street, Phila- delphia, Pa. 19103.) S9CIETY OF AUTOMOTIVE ENGINEERS CAE Handbook. (Application for copies should be addressed to the Society of Automotive Engineers, 485 Lexington Avenue, New York, N.Y. 10017 . ) OFFICIAL CLASSIFICATION COMMITTEE Uniform Freight Classification Rules
20、 (Application for copies should be addressed to the Official Classification Committee, 1 Park Avenue at 33rd Street, New York, N.Y. 87102.) 3. REQUIREMENTS 3.1 Description. The motor-generator (hereafter referred to as set) shall consist of a brushless motor and brushless alternator installed in a c
21、ommon housing with rotors on a common shaft supported by a single bearing at each end, a static voltage regulator, a rigid skid base, a splashproof housing, and all other devices required to achieve a complete motor generator set. following voltage ratings: to line (240/416) wye. to line (120/208) w
22、ye. The set shall be reconnectable for the 3 phase, 4 wire, 240 line to neutral and 416 line 3 phase, 4 wire, 120 line to neutral and 208 line (a) (b) 4 Licensed by Information Handling ServicesMIL-M-28903 (MC) 3.2 First article. Prior to submission of any comp1et:e production items for acceptance,
23、the contractor shall furnish first article sets (see 6.2) for examination and test within the time frame specified (see 6.2) for determination of con- formance to this specification. be those specified herein. from the accepted first article. article will not relieve the supplier of his obligation t
24、o furnish sets conforming to this specification. Examinations and tests shall Production sets shall not deviate Approval of the first 3.2.1 First article test report. A first article test report shall be required. This report will verify compliance with the first article test requirements of Section
25、 4 herein. In addition, the report shall include mathematical analysis using stress concentration design factors that will indicate the value of maximum stresses occurring in the alternator- motor shaft, and indicating conformance to this specification. 3.3 Initial production. When specified (see 6.
26、21, the supplier shall furnish to the Government one or more sets for in they shall serve merely to hold current- carrying parts (lugs, terminals, etc.) in firm contact with each other. Where flow of current through a stud cannot be avoided, the stud and all its associated hardware (nuts, locking de
27、vices, washers, etc.) shall be made of corrosion- resistant material. Positive means (such as square shanks or pins) shall be provided for preventing turning of studs in their mountings when nuts are tightened or loosened: lock- washers which depend on friction or spring action will not be accepted
28、for this purpose, Unused length of studs (or screws used as studs) shall not exceed half the diameter of the stud. 3.4.13 Fasteners, except electrical. Fasteners, except electrical, shall conform to requirement 12 of MIL-m-454. No swaging, peening, or staking of parts subject to removal or adjustmen
29、t shall be permitted. 3.4.14 Terminal boards and strips. Terminal boards and strips shall conform to requirement 19 of MIL-STD-454. Ter- minal boards and strips shall be used in preference to quick disconnect connectors, which shall be used only where termi- nal boards and strips cannot practicably
30、be used. 3.4.15 Hinqes and latches. Hinges shall conform to MS35823 and shall be material A when attached to aluminum and material C when attached to steel. Latches shall be made of corrosion- resisting metal and shall require manual, not spring, action for closing. 3.4.16 Tiedowns. Tiedowns shall b
31、e provided in accordance with the requirements of MIL-A-8421. 3.4-17 Semiconductors. Semiconductors shall conform to requirement 30 of MIL-STD-454. In addition, all semiconductors shall be capable of withstanding, or be protected against, transient voltages and current peaks as may be experienced du
32、ring the following conditions: terminals. (a) Short circuit (single or three phase) at the set (b) Sudden application of half rated load at the set terminals. 8 Licensed by Information Handling ServicesMIL-M-28903 (MC) (c) Actuation of the overvoltage protection device through an actual overvoltage
33、condition of the set. The use of circuits that require semiconductor devices of matched or paired characteristics is prohibited. Rotating rectifiers shall be readily accessible for testing and re- placement in the field. 3.4.18 Sheet metal screws. Sheet metal screws shall not . be used. 3.4.19 Quick
34、 disconnect fasteners. Quick disconnect fas- teners shall conform to type II or type III of MIL-F-5591. 3.4.20 Wirinq. Single-conductor wire shall conform to MIL-W-5086. Multiconductor cables shall conform to MIL-C-3432. All wires shall be not smaller in diameter than No. 16 American Wire Gage(AWG).
35、 shall be not more than the values specified in MIL-W-5088 for bundled wires. be clamped to supporting structures with insulated clamps at close intervals to assure a neat and orderly run. cables shall be installed in a manner which will prevent danage from chafing or abrasion. be spliced at any poi
36、nt throughout the length of their runs. Connections to leads which are integral with control devices shall not be considered to be spliced. wiring arrangements, and connections to instruments and control devices shall be done neatly and in a manner to facilitate removal of those devices. Terminal bl
37、ocks or AN-type connec- tors conforming to MIL-C-5015 shall be used where applicable. Right-angle connectors shall be used to avoid sharp bends in wires and cables at the connectors. When single conductor wire is used for interconnection of these components, the wire shall be bundled in polyethylene
38、 tubing conforming to type A, form U of MIL-1-631, except for wire in the control cabinet. Tubing shall extend the entire length of each wire and shall be secured at the ends by means of integral clamps on the connectors. Except for wiring integral with control devices, any control wiring energized
39、by direct current(dc) shall be colored red, and the color shall contrast distinctly with the color of other control wiring. Terminal lugs shall be used on power leads and are preferred for all other wiring. When solder is used, only resin flux shall be used and any traces of resin remaining after so
40、ldering shall be removed. ductor tips or lugs shall be firmly attached to the conductors so that conductor insulation at the joint will be fully pro- The amount of current carried by any one wire All wires and cables shall be bundled and shall Wire and Cables and wires shall not The panel wiring, Co
41、n- 9 Licensed by Information Handling ServicesMIL-U-28703 61 777770b 0071237 7 W MIL-M-28903 (MC) tected and ample support will be provided for the conductor at that location. Conductor connections to all apparatus srbjectto adjustment or vibration shall be made in such a manner as to preclude a con
42、tact or ground with any of the adjacent apparatus. Connecting conductors shall be formed and supported by insulated cleats to prevent tension from being transmitted by the cable through the support. Con- ductors shall be installed to minimize difficulty of individual replacement. stamped on the insu
43、lation of all wiring at 3-inch intervals. 3.4.21 Positive lockins of fasteners and pins. Locking of screws, pins, and bolts shall be by locknuts, catellated nuts with cotter pins, positive lockwashers, lockwire or lockplates. No swaging, peening, or staking of parts subject to removal or adjustment
44、shall be permitted. tive on machine screws, cap screws, and bolts whose nominal size is not more than one quarter of an inch. Identification markings shall be permanently Lockwashers shall be cap- 3.4.22 Blind hardware. A nut that cannot be grasped by the thumb and forefinger of one hand and by the
45、use of a common tool shall be caged, or some equivalent means shall be used to obviate the handling of the nut during removal or assembly. 3.5 Environmental, operational and handlins requirements. The set shall equal or exceed all requirements stated herein, maintaining a mean time between failures
46、of not less than 2,000 hours, and a mean time between overhauls (MTBO) of not less than 8,000 hours. 3.5.1 Ctartinq. When equipped with all accessories, the set shall start (see 6.3.1) within 30 seconds with rated wltagef10 percent applied and shall operate as specified herein under the following co
47、nditions: possible relative humidity. set at angles from the vertical to 15 degrees from the vertical. 15 degrees from level. (a) (b) (c) At ambient temperatures from +1250F to -65OF at any With 12 inches of rain per hour impinging on the With the base of the set in planes from level to (d) At 10,00
48、0 feet above sea level at an ambient temperature of 900F. 10 Licensed by Information Handling ServicesMIL-M-28903 (MC) (e) (f) At any speed up to and including 125 percent of In ambient dust conditions up to and equal to operating rated speed. causing zero visibility in bright sunlight. 3.5.2 Set ef
49、ficiencv. The overall input-output set effi- ciency at rated load shall not be less than 85 percent. 3.5.3 Operatinq stieed. Operating speed shall not exceed 1846 revolutions per minute. 3.5.3.1 Frequency recoverv time. The time to return and stay within f0.5 percent of the rated value of the steady state frequency shall not exceed 0.5 second following sudden changes in an 0.8 pf load from no load to full load and full load to no load. 3.5.3.2 Frequency deviation. Under the conditions speci- fied in 3.5.3.1, the maximum frequency deviation shall not exceed 4 percent of the rated value
