1、MIL-G-55123 (2) 61 9999906 0093725 B E MI LITARY MI L-G=55123(SigC) SPEC IF IC AT1 ON Amendment 2 6 ky 1963 GENERATOR SET, GASOLINE ENGINE PU-422( )/U 1, 2, 3. 4. 5, Paragraph 1.1 Replace “28 volts d.c.“ with “29 volts d.c.“, Paragraph 2.1 The following changes shal I be made to this paragraph: (a)
2、Delete Specification MIL-L-2104 and its title. (b) Change Specification MI L-R-105509/3 to MI L-R-10509/3. (c) Delete Specification MIL-R-11050 and its title. (d) Add Specification MI L-S-19500/194 and its title, 5emiconductor Devices, Diodes, Silicon, Power Rectifier, Types JAN-IN253, JAN-IN254, JA
3、N-IN255, and JAN-I N256 II (e) Delete Standard MIL-STD-108 and its title. (f) Delete Standard MlL-STD-175 and its title. Paragraph 2.2 Other publications.- Delete “NATIONAL BUREAU OF STANDARDS, Handbook H28, the title and lhe information contained in the parentheses.“ Paragraph 3.1 Description .- Re
4、place this paragraph in its entirety with the fol lowing: “3.1 Description.- The generator set consists of an air-cooled, one cylinder, four stroke cycle, gasoline engine directly operating a 14 pole, permanent magnet generator producing 400 cycle, 115 volt a.c. nominal, a rectifier assembly produci
5、ng 29.3 volts d.c. nominal, an automatic recoil rope starter, control panel, voltage regulator, governor, speed adjuster, mufflers, radio interference suppression components and other devices required to achieve a complete engine generator set; all mounted and arranged for operation within an accous
6、tical case.“ Paragraph 33.3 Rectifiers, metallic.- Replace in its entirety with the following: “3.5.3 Rectifier, direct current.- A full wave, three phase rectifier assembly using -six JAN-IN253 diodes per Specification MIL-S-19500/194, shall be provided,“ Sheet .1 .of 6 Sheets FSC-6115 Copyright Co
7、mmunications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Amendment 2 to Spec Mi L-G-55 123(S igC) 6. Paragraph 3.5.6 Resistors.- Change Specification MIL-R-105509/3 to Mi L-R-l05W/3, 7. Paragraph 3.5.
8、8 Rotating joints.- Make the following changes: (a) In line three, change “cause“ to “caused“. (b) In line four, change “lubricant“ to “lubrication“. 8. Paragraph 3.6.4 Engine speed adjustments.- Add “across a 37 ohm resistive load“ to the end of this paragraph. 9. Paragraph 3.7 Generator .- Replace
9、 in its entirety with the following: I “3.7 Generator.- The generator used in conjunction with.the engine shall be of the permanent magnet type without bearings. The total weight of the generatoi shall not exceed 12 1/4 Ibs. The rotor assembly shall be a centrificast unit, employing non-magnetic mag
10、net shields and ci pole shoe damper winding. The rotor shall be dynamically balanced so that at 5000 rpm, the displacement shall not exceed 0.0002 of an inch measured at bearing points of the rotor when it is freely supported. (Not restrained by bearings). The insulating material used in the stator
11、shall be class F, or C (310 F minimum) conforming to Specification MI L-E-917. All parts, materials and processes employed in the generator shall conform to Specification MIL-E-917. The generator shall meet the following charac- teristics: (a) Frequency 4O cycles (b) Poles 14 (c) Speed 3428 rpm . I
12、(d) Output 0.5 KW, single and three phase, in accordance with 4.8.1.1 .I 10. Paragraph 3.8 Electrical Output.- Replace in its entirety with the following: “3.8 Electrical output.- The generator ret shall provide electrical outputs as follows:1 11. Paragraph 3.8.1 A-C power.- Insert the word “set“ af
13、ter “generator1. 12. Paragraph 3.8.1 .i Frequency regulation,- Underline heading and change percentage from (If 15 to%5 It . 2 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Amen
14、dment 2 to . Spec MI L-G-55123(SigC) ,. 13. Paragraph 3.8.1.3 Replace in its entiiety with the following: -J “3.8.1.3 A-C harmonics.- The A-C harmonic content shall be 8% maximum“. 14. hagraph 3.8.2 D-C power.- Replace in its entirety with the following: l3.8.2 D-C power.- 29.3 volts d.c., 100 watts
15、 nominal under continuous rotating conditions and 125 watts intermittent for 2 hours, shall be obtained from a three phase winding of the generator through the rectifier.“ IS. Poragraph 3.8.2.1 Replace in its entirety with the following: “3.8.2.1 Voltage regulationL- The voltage regulation shall be
16、20% maximum.“ 16. hagraph 3.13 Fuel line.- Delete paragraph in its entirety. 17. Paragraph 3.14.2 Add the following paragraph: “3.14.2 Caution labels.- A warning plate shall be affixed to the top of the ensine- generator assembly mount, containing the following information: “WARNING: Engine Stopping
17、 Procedure: Shut off fuel supply from tank to engtne and allow engine ta run until fuel in carburetor and fuel line is consumed. This procedure will eliminate possibility of fuel spillctge from Carburetor when unit is trans- portad and probable fire or explosion when engine is restarted.“ 18. Poragr
18、aph 3.15 - Engine endurance run.- Replace in its entirety with the foliowtng: “3.15 Endurance run.- The generator set shall function proporly for at least loo0 hours of operation. Major overhaul shall not be required un 17 1/2“ long Maximum“ to “18“ high, 17 1/2“ wide, 18 1/4“ long . Maximum“ . 21.
19、Paragraph 3.18.2 Gasoline engine, generator set.- Change the weight from “58 1/2 pounds, Maximum“ to “58 1/2 pounds, Maximum (Power unit and care).“ 22, Poragraph 3.19 uty cycle operation.- Delete “3.5.7 and“ appearing in line three. 3 Copyright Communications - Electronics Command Provided by IHS u
20、nder license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-55123 (2) hL m 77777Oh 0073728 3 m Amendment 2 to Spec MI L-G-551236igC) 23. Paragraph 3.20 Tom erature-Altitude.- in subparagraph Operating (1) II delete the second sentence and -%-TT rep
21、ace wit t e following: “After a 15 miiiute period at no load, the engine-generator set, in its case, shall be capable of maintaining full rated loud (see 4.8.1 .i) at sea level with an outside the case temptiature of 135O F and at 10,000 feet above sea level with an outside the case ternp- eraturt o
22、f 85 F.“ 24. Paragraph 3.22 Dripproof.- Replace in its entirety with the following: “3.22 O eration in rain.- The generator set PU-422( )/U in Case, Engine Generator CY-2318( ) * PS- 1 s a operate in a rainfall of ten inches par hour (see 4.12).“ 25. Paragraph 3.24 Temperature rise.- Replace in its
23、entirety with the following: “3.24 Temperature test .- The temperature of the generator inside the acoustical case (see 4.13.1) after 2 hours operation of the set at rated load (see 4.8.1 .i) at sea level, in ambient temperature of 135 F outside the case, shall not exceed 310 F. During this test, th
24、e temperature of the engine lubricating oil in the crankcase sump shall not exceed 330 F. (See 4.13.2.)“ 26. Paragraph 4.3 Preproduction inspection.- Delete the test for “Dripproof“ and its rquire- ment and inspection paragraph numbers from Table I. Change “Temperature rise“ to “Temperature test .II
25、 I 27. Paragraph 4.4 Acceptance inspection covered by subsidiary documents .- Delete “Suppression“ and its paragraph number. 28. Paragraph 4.5.1 Group A inspection.- In Table li, delete the following Ifno,“Fuel UM, 3.13, 4.6 1%,4%!. .Under insction.paragraph, replace “4.8.1 .d! with “4.8.1 .ay, and
26、add “4.8.1.1“ before “and 4.8.1.2“. 29. Paragraph 4.5.2.1 Group Bsampling plans;- In Table 111, add test for “Operation in rain“, requirement paragraph “3.22“, inspection paragraph 114. 12“ and an AQL oQ6.5%“. Add test for “Dynamic balarice“, requirement paragraph (3.7(l, inspection paragraph “4.24“
27、 and an AQL of ii6.5%11. Replace “Lubricating Oil Temperature Rise“ with “Lubricating oil temperature“ and its inspection paragraph “4.13“ with “4.13.2“. 30. Paragraph 4.5.3 Group C inspection.- Replace heading of Table IV with “Group C inspection . I 31 . Paragaph 4. Viscal and mechanical inspectio
28、n.- Replace MIL-STD-175 with MIL-STD-705. 32. Paragraph 4.6. 1 Mechanical and visual inspection.- Delete sub-prograph “(9)“ In th ent traty . i I 4 I Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without li
29、cense from IHS-,-,-MIL-G-55123 (2) 61 M 799770b 00937Z9 5 _. Amendment 2 to Spec MI L-G-55123(SigC) 3. Paragraph 4.8.1 Full load.- Replace in its entirety with the following: “4.8.1 .l Full load.- With dummy loads drawing 400 watts A-C at 0.95 power factor and 3.4 amperes D,C connected to the genera
30、tor and the engine speed adjusted to obtain 115 volts romos., the following measurements shall be obtained.“ 34. Sub-paragraph 4.8.1.1 C. D-C Volts.- Replace in itsentirety with the following: “c. D-C Volts.- 29.3 f 5% (i .4 volts), as measured on a Woston Model #931, (0-50 volt- voltmoter.It .s . S
31、ub-paragraph 4.8 . 1 . 1 d, D-C Amps .- De lete “IS% (O . 14 amps)“ . 3 . Sub-paragraph 4.8 . 1 . 1 e . A-C Watts .- Delete “55% (20 watts)“ . - 37. Sub-paragraph 4.8.1 e 1 h. D-C Watts.- Replace “80 watts f 5%“ with “100 watts f 5%“. . 38 Note of paragraph 4.8.1 .i Replace “should“ with “shall“. 3
32、. Note of paragraph 4.8.1.2 Replace “should“ with “shall“. 40 . Paragraph 4.10 Engine endurance test .- Delete “Engine“ from paragraph heading and replace “engine-geiierator“ with “generator set“. . 41 Poragraph 4.12 Dripproof test.- Replace in its entirety with the following: “4.12 Rain test.- Dome
33、stic type sprinkling heads shall provide a simulated rainfall of approximately IO inches per hour on the generator set in the operating condition. They shall be pointed up to provide a free fall of approximately 13 feet as measured to the ground. The design of the fixture shall be approved by the pr
34、ocuring agency. The gen- erator set shall be operated at full load throughout the rain test which covers a period of one hour. Immediately sfter this test, the equipment shall be examined for entrapped water and a maximum of i/2 ounce is permissable .I 42 Paragraph 4.13 Temperature rise .- Replace “
35、rise“ with “test“ in this heading. I 43 Paragraph 4.13.1 Generator (only).- Replace in its entirety with the following: 14.13.1 Generator (only).- The temperature test shall consist of measuring the gen- erator frame temperature at a point closest to the windings while the generator is under the l&d
36、 conditions of 3.8 and the test shall be performed in accordance with the test Method 680.1 o Mllitary Standard MIL-STD-705. * 5 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.
37、MIL-G-55123 (2) 61 = 7777906 0073730 L Amendment 2 to Spec MI L-G-55 123(S i&) 4. 4s. 46. Paragraph 4.14 Terrperature-Altitude test .- Delete “1/2“ in line 4. Paragraph 4.19 Oi I consumption test .- Add the fol lowing to the end of this pragrapk. “if the unit fails, the test may be repeated. If the
38、unit fails a second time, the test may be repeated again however, any unit that fails to meet the requirements within a total of 15 hours of operation will be considered as having failed the test.“ To the end of Section 4, add the following paragraph: “4.24 O namic balance.- The generator rotor shall be tested for dyneimic balance and shall comp -5-mT- y wi t e requirements stated in 3.7.“ Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
