1、 NS90L112 REV E bl 9999912 0002829 8 39 2 1.0 VOLT NO LOAD 760 HZ TO MATE WITH MS -3112E-20 - 16P TO MATE WITH MS-3116E-20-16S PART NO. M90412-1 UEIGHT: 0.8 POVNDS MX NOTES: - 1. D-IONS ARE IN INCHES: TOIERANCE 1/32 I“ UNLeSS OTHERWISE SPIJCIFIED. 2. 3. FOR DESIN FEAnrBE KIRKSES, THIS STANMRD TAKES
2、RIECEDENCE OVER ALL OUTLINE DIIIENSIONS ARe LIMITING DMENSIONS ONLY. lmalmrn BEFEBENCED HEREIN. 4. EFEWNCED SHALL BE OF THE ISSUE IN EFFECT ON MTE OF INVITATIONS ro( BIDS OR WUEST FOR PROWL EXCEPT “MT REFERENCED ADCIPTED INDUSTRY SHALL GIM? THE MTE OFTHE ISSUE MOPIED. WlmEmNTS: 1. ANY PROTRUSIONS SU
3、CH AS SCILEW AND RIVETS IUUDS AND BOSSES SMLL BE CONMINED mIN THe OUTLINE SlumN. 2. TIIE UNDERFBEpuENCy -CIKIR SWLL BE COWPATIBE VZTH TIE AC CENERATINC SYSTEM DESCRIBED IH W21970. COMPLY Wii MEITARY SpeCfpICATION ML-R-5757. ILEUYS INCORPORATED IN THE UNDERFIIEQUENCY PROTeCPOR SWLL 3. I1E UENCY PRDTC
4、TOR sau BE CAPABLE OF =KING me CTS A-A AND B-B mhG DIAW ABOVE) ANY TII& THE MPVP EQLlENCY IS IESS TWAN 725k AND SHALL WE CfBcuITs A-A UID E-B WENEVER THE MPVT FREQUENCY IS ABOVE 775 % AT SEA UWEL WBIEW COEIDITIONS. CLIaINc AND OmIM OF 20k. IWRE SHALL BE A IIIHI“ DIFFERENCE BEIWEN COPY Provided by IH
5、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ MS90432 REV E bL E 9999932 0002830 4 E * NAVY - AS iCr, QIWEN WIUT#W HIL-G-lllbBS 1.1 8copE: DEIETE AND ADD: THIS SPECIFICATION COVERS THE REQUfREMENTs FOR AN UNDERFREQUENCY PROTECTION UNIT TO BE LEED WITH AN AIRCR
6、AFT CONSUNT FREQUENCY 400 Hz EIECTRIC SYSTeM. YILITARY STANDARD TITLE PROTECTOR, UNDERFREQUENCY MS90412 (AS) A-4E, A-4F AIRCRAFT WET 2 ff 2 UCIIIEDES: 3.4.10.1 VLTAGE SETTING: DELETE AND ADD: THE VOLTAGE APPLIED BETWEEN PINS A AND B WILL BE 39 f 1 VOLT. 3.4.13 IDEWTIFICATION OF PRODUCT: DELeTE AND A
7、DD: NAFIEPUTE SHALL BE IN ACCORMNCE WITH MIL-N-18307 3.5.7.1 FAISE TRIPS: CHANCE To RUD: WO TRIPPING OF THE GENERATOR SYSTW SHALL BE CAUSED BY BUILI, UP, LQCD SWITCHING, INPtPT SPEED ACCEIERATION OR DECEURATION DURING EXTERNAL WWER APPLICATION OR DERFREQUENCY PROTECTOR. FAULT CIEARING UTS SI DE THE
8、OPERATING UND OF THE UN- 3.5.7.4 UNDERFREQUENCY: CHANGE TO READ: “THE UNDERFREQUENCY PROTECTOR SHALL PROVIDE MEANS , OF PREVENTING A FIEQUENCY OF LESS T1UN 362.5 Hz BEING IMPRSSED ON ZHE UUD BUS FOR A PERIOD IN EXCESS OF 0.1 SECONDS.THE DEVICE SHALL HAVE A FLhXIHUti PICK-UP OF 387.5 ,&. 4.2.1.1 QUAL
9、IFICATION: ADD: QUALIFICATION .TESTS SHALL BE SUPPLEMENTED WITH A MINIMUM 100 HOUR FAILURE FREE FLIGHT TEST BEFORE CONSIDERATION IS GIVEN To INCORPORATING THE ITEM ON THE QUALIFIED PRODUCTS LIST. 4.5.14 DELETE (a), (b), (c), (d) and (e) and add: (a) WITH THE UNDERFREQUENCY PROTECTOR CONNECTED INTO T
10、HE AC GENERATING SYSTEM MS21970, IT SHALL BE CAPABLE OF MEETING, WITHIN 0.5% OF THE CONDITIONS OF REQUIREKENT 3 WHEN SUBJECTED TO THE FOLLOWING AMBIENT TEMPERATURES AND ALTITUDES: SEA LEVEL +125OC AND 50,000 FEET AT -55OC. (b) THE UNDERFREQUENCY PROTECTOR SHALL BE SUBJECTED TO THE VIBRATION TESTS OF
11、 MIL-E-81910, AFTER WHICH IT SHALL MEET THE CONDITIONS OF REQUIREMENT 3. 6.1 DELETE AND ADD: INIENDED USE: “THE UNDERFREQUENCY PROTECTOR MY BE INSTALLED IN THE SYSTEM REGLUTOR CIRCUIT (W21790) SO AS To AVrOMTICALLY DEENERGIZE THE CENERATOR DURING SWUT-DOWN AND/OR CONSTANT SPEED DRIVE WLFIRICTION SO
12、THAT ILIWIFREQUENCY PMER WILL NOT BE APPLIED To THE AIRCRAFT BUS. DELETE ALL REFERENCE To AND REPUIREMENE OF: 3.4.6 THROUGH 3.4.10. 3.4.12.1. 3.4.13.1 THROUGH 3.4.14 3.5.7.3 3.5.715 THROUGH 3.5.7.7 4.3 TWOUGH4.4.4, 4.5.2 THROUGH 4.5:4.2 4.5.6 THROUGH 4.5.11 4.5.13 4.5.15 THROdH 4 5 19 4.5.20.2, 4.5.13, 4.5.16 THROUCH 4.5.29,4:5.51, 4.5.33.1. 3.5 THROUGH 3.5.6, 3.5.7.2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
