ARMY MIL-P-14881 (2)-1977 POWER SUPPLY 10559345 (PFN CHARGE)《电源 10559345(脉冲成形网络充电 PFN)》.pdf

1、. . . t:.:.: . . . . . MIL-P-14881 (MU) AMEm?IENT 2 17 February 1977 SUPERSEDING AIENDIENT 1 29 August 1973 MILITARY SPECIFICATION POWER SUPPLY: 10559345 (PFN CHARGE) This amendment forms a part of Military Specification MTL-P-l4881(MU), dated 2 March 1970. Page 4, paragraph 3.3.1.2.5: Delete “1500

2、+, 30“ and substitute “1330 f 30.“ Page 4, paragraph 3.3.1.2.6: Delete and substitute as follows: “3.3.1.2.6 PFN voltage programming.- With the PFN voltage set to +120O f 15 Vdc by using a 100 kilohm load between P1-6 and P1-9 at room mbient (+60F to +90F), a change from the 100 kilohms load to 32.4

3、 kil- ohms load shall change the PFN voltage to +1345 f 40 Vdc at room anbient and to +i345 5 95 Vdc when subjected to the high (+125F) operating temp- erature extremes of 3.3.2.2. to 3.32 megohms load shall cause a change in voltage from a setting of 4-1200 jected to the low (-40OF) operating tempe

4、rature extremes of 3.3.2.2.“ Similarly, a change from the 100 kilohms load . . i 15 17dc to $1030 5 30 Vdc at room ambient and to +lo30 +, 71 Vdc when sub- . .- Page 6, Figure 1: Delete “40 f 20“ and substitute “100 5 40“; in note: Delete “40 f 32“ and substitute “100 2 60“. * Page 6, Figure I: Dele

5、te “.6 f .3“ and substitute “.84 .4“; in note: Delete l.6 2 .5“ and substitute 8 f 6“. Page 6, paragraph 3.3.2.2: Delete “3.3.1“ and substitute “3.3.1 (ex- cep t 3.3.1.2.5) . Page 10, Table V, Test Procedure column: Delete and substitute the foilowing: “4.6.7.1 and 4.6.7.2“. Page 15, paragraph 4.6.7

6、, lines 4 and 5: Delete “and the tolerance requirements for vibration frequency measuring instruments shall not opp ly “ . Page 15, peragraph 4.6.7.1, “NOTE“: Delete “less than 7OF“ and substi- tute “no greater than 3F“; paragraphs 4.6.7.1(b) and (f): and Substitute “1 hour“. Delete “5 hours“ Pega 1

7、6: Delete “4.6.4.2“ and substitute “4.6.7.2“. Page 16, paragraph 4.6.?.2(a): Delete snd substitute as follows: FSC 1240 THIS DOCUMENT CONTAINS 3 PAGES. - -=-, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-14881 (MU) fiE2XDNENT 2 “(a) Test in

8、accordance with Method 514.1, Procedure I of MIL- STD-810 for category (f) equipment, except that resonance search and dwell on resonance shall not be required and the acceleration shall not exceed f 4g and the maximum excursion (double amplitude) shall be 0.5 inch.“ * “The margin of this specificat

9、ion is marked with an asterisk to in- dicate where changes (additions, modifications, corrections, deletions) from the previous issue were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are

10、 cautioned to evaluate the requirements of this document based on the entire content irrespec- tive of the marginal notations and relationship to the last previous issue. I Custodian: Army - Mu * LS. GOVERNMENT PRINTING OFFICE: 1977-703-020/2028 Preparing activity : Amy - MU Project No. 1240-A702 Page 2 of 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-