1、1. SCOPE 1.1 s component i MIL-T-81768 (AS) 30 November 1970 MILITARY SPECIFICATION TRANSFORMER-RECTI FIER TEK-9 /A24B - 4 (V) This specification has been approved by the Naval Air Systems Command, Department of the Navy. ope - The equipment covered by this specification shall b u an Aircraft Monito
2、r and Control (AMAC) System A/A24B-4(V). d a Trakformer-Rectifier TEK-9/A24B-4(V) shall provide the power required for operation of the internal circuits of a nuclear weapon. 1.2 Classification - The equipment covered by this specification shall consist of one major item. 1.3 Associated Equipment -
3、This equipment shall operate with the associated equipment listed in 6.5. 2. APPLICABLE DOCUMENTS 2.1 General - The following documents of the issue in effect on the date of invitation for bids form a part of this specification to the extent specified herein : SPECIFICATIONS Mi lit ary MI L-E -5400
4、Electronic Equipment, Aircraft, General Specification for MIL-T-5422 Testing, Environmental, Aircraft Electronic Equipment MIL-E-17555 Electronic and Electrical Equipment and Associated Repair Parts, Preparation for Delivery of I FSC -5e5- Provided by IHSNot for ResaleNo reproduction or networking p
5、ermitted without license from IHS-,-,-MIL-T-3768 58 M 777q706 0372082 M MIL-T- 81768 (AS) MIL-T-18303 STANDARDS Mi lit ary MI L-STD-46 1 MIL-STD-704 MIL-STD-781 MIL-STD-794 DRAW I NGS Naval Air Systems Command DL. 68A28E1 PUBLICATIONS Military ANA Bulletin No. 400 Test Procedures; Preproduction and
6、Inspection, for Aircraft Electronic Equipment, Format for Electromagnetic Interference Requirements for Equipment Electric Power, Aircraft Characteristics and Utilization of Reliability Tests, Exponential Dis tribution Parts and Equipment, Procedures for Packaging and Packing of Data List for Transf
7、ormer-Rectifier TEK-9/A24B-4 (V) and all drawings therein Electronic Equipment; Aircraft and Guided Missiles, Applicable Documents 2.1.1 Availability of Documents - When requesting specifications standards drawings, and publications refer to both title and number. specification and applicable specif
8、ications and documents required by contractors in connection with specific procurement functions may be obtained upon application to the Commanding Officer, Naval Supply Depot, Code 105, 5801 Tabor Avenue, Philadelphia, Pennsylvania 19120. Copies of this 3. REQUIREMENTS 3.1 testing. Preproduction -
9、This specification makes provision for preproduction 3.2 Parts and Materials - 3.2.1 General Requirements - The parts and materials specified in the drawings and related documents for use in construction of this equipment were selected to ensure the fulfillment of all requirements of this specificat
10、ion. Any deviation by the contractor from the use of these specified parts and materials necessarily places both the burden of proof for the acceptability of the change, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-T-8L768 58 7779706 0372083
11、b = MLL-T-8l768 (AS) and the cost associated therewith, upon the contractor. must be requested from the procuring activity by the contractor and granted by the procuring activity prior to submission of equipment for preproduction tests. Approval of parts and material deviations shall not be construe
12、d by the contractor to constitute a waiver of the performance requirements or any other lequirementc of this specification a Approval for deviations. 3.2.1.1 Nonstandard Parts and Material - Approval for the use of nonstandard parts a-als shall be obtained by the contractor as outlined in MIL-E-5400
13、. 3.2.2 2 - In the event that the contractor proposes eo alter the equipment design delineated by this specification and applicable drawings materials are applicable. the foollowing supplemental requirements for the selection of parts and 3.2.2.1 Basic Conformance - Parts and materials selected for
14、use in the equipment shallrequirements of MIL-E-5400 e Parts chal l be selec%ed from those parts included in ANA Bulletin No. 400, unless the parts listed therein will not perform adequately in the intended applications and environments specified herein. 3.2.2.2 Interchangeability - The equipment sh
15、all meet the interchangeability requirements of MIE-E-5400. standard for measuring interchangeability sf all applicable units subassemblies , and parts. 3.3 Design and Construction - The equipment shall be manufactured in accordance-subsidiary specifications listed in DL 6SA28BE and related lists, e
16、xcept insofar as errors of omission or commission on the drawings may be incompatible with tRe requirements of this and related specifications. In any case it is a condition of final acceptance that the equipment manufactured met all the performance requirements of this specification , and such acce
17、ptance test documents as may be applicable. Proposed changes, either to correct drawing discrepancies or to effect improvements, shall be specifically approved by the procuring activity prior to their incorporation. The drawings listed in DL 68A28E1 shall be the assemblies 3.3.1 Total Weight - The t
18、otal weight Q% the equipment, excluding cables, shall not exGd 6 poun$s, 13 ounces. 3.3.2 Reliability - 3.3.2.1 -Stability - The equipment shall operate with satisfactory performance, continuously or interinittently for a period of at least 50 hours without the necessity for readjustment of any cont
19、rols which are inaccessible to the operator during normal use. Qperating Life - The equipment shall have a minimum total operating life o% 50,080 hour-asonable servicing and replacement of parts e requiring scheduled replacement due to wear during the life of the equipment, and the wearout life of s
20、uch parts, shall be determined by the contractor and submitted to the procuring agency. 3.3.2.2 Parts Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-S1768(AS) 3.3.2.3 Reliability in Mean-Time-Between-Failure (MTBF) - The equipment shall have a
21、 minimum of 6700 hours of mean (operating) Mme between failures when tested and accepted as outlined under the requirements of 4.4.3. 3.3.3 Interference Control - Tiie generation of radio interference by the equipment and the vulnerability of the equipment to radio interference shall be within the l
22、imits of MIL-STD-461, class ID except as noted below: Test Code Extended Limits CEO1 Steady state 25 db Transient 50 db CE02 Steady state 25 db Transient 50 db CE03 Steady state 10 db Transient 50 db CE04 Steady state 10 db Transient 50 db REO2 Transient 20 db 3.3.4 Standard Conditions - The followi
23、ng conditions shall be used to establish normal performance characteristics under standard conditions and for making laboratory bench tests. Temperature Alt i tude Normal ground Room ambient (25 - + 5C) Vibration None Humidity Room ambient up to 90% relative Input power voltage 115 + 1.0 volts, 400
24、- + 5 Hz a-c 3.3.5 Service Conditions - The equipment shall operate satisfactorily under any of the environmental service conditions or reasonable combination of those conditions as specified in MIL-E-5400 for class 2 equipment, except as modified herein. 3.3.5.1 Vibration - The equipment shall oper
25、ate satisfactorily when subjected to the vibration requirements of Curve I of MIL-E-5400. 3.3.6 Warm-up Time - The time required for the equipment to warm-up prior to operations shall not exceed O. 5 minute. 3.3.7 Input Electrical Power - 3.3.7.1 Operating Power - The equipment shall meet all applic
26、able requirements of MIL-STD-704 and shall give specified performance when energized Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-83768 58 7777706 0372085 T W from the following power sources having characteristics and limits as defined in M
27、IL-STD-704. The power required shall not exceed the specified amounts. A-C Power (Three Phase), 115/200V, Category B, 1500 VA 3.3.7.2 Degraded Performance - Degraded performance will be permitted for voltage transients not exceeding 0.5 second during normal electric system operation. Operation shall
28、 return to normal with no resulting damage to the equipment. 3.4 below plus any and all performance requirements stated on the drawings of DL 68A28E1. standard and extreme service conditions. service conditions are acceptable, such variations are specified. Performance - The performance of the equip
29、ment shall be as set forth Unless otherwise specified, these requirements shall apply under both When reduced performance requirements for 3.5 Detail Requirements - Transformer-Rectifier TEK-9/A24B-4(V) shall be manufactured in accordance with the documents listed on DL 68A28E1 and shall meet the re
30、quirements stated thereon and in the following subparagraphs. 3.5.1 Function - The transformer-rectifier shall convert 115 volt, 3 phase, 400 Hz aircraft power to 28 volt d-c power required by a nuclear weapon to perform safing and arming operations through Relay Panel RYK-13/A24B-4(V) as required b
31、y Control-Monitor DCK-143/A24B-4(V). 3.5.2 Weight - The weight of the transformer-rectifier shall not exceed 6 pounds, 13 ounces. 3.5.3 Content - The transformer-rectifier shall contain the following components. (1) Power Relay - A power relay shall be provided to apply 115 volt, 3 phase, 400 Hz pow
32、er to the primary of a transformer, when energized by 28 volts d-c. (2) Transformer - A step-down transformer shall be provided to convert 115 volt, 3 phase, 400 Hz primary power to 21.6 volt (+2.5 - percent) line-to-line, 3 phase, 400 Hz output power. Output Filter Circuit - An output filter circui
33、t shall be provided to filter the transformer output to supply 28 volt d-c power with a maximum ripple of 1.5 volts when loaded with a 2.3 ohm resistor. Input Filters - Input filters shall be provided to reduce radio frequency interference. (3) (4) 3.5.4 Electrical Characteristics - The electrical c
34、haracteristics of the transformer-rectifier shall be as indicated in the following paragraphs. 3.5.4.1 Output Voltage - With an input of 109.5 to 116.5 volts, 3 phase, 400 Hz, the output shall be 28 volts d-c nominal and 29 volts d-c maximum. 3.5.4.2 Load Conditions - The transformer-rectifier shall
35、 be capable of sustaining an output of 10 amperes with a voltage of 23.5 volts d-c or greater. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-81768(AS) I - I 3.5.4.3 Pulse Loads - Ihe transient characteristic of the transformer- rectifier shal
36、l be such that within 1.25 milliseconds after the pulse loads listed in table 1 are applied, the voltage available to the load shall equal or exceed the value listed, and shall remain at or above this value for a minimum of 2 milliseconds. During application of the pulse loads, the interference cont
37、rol requirements of MIL-STD-461 are not applicable. Table 1. Pulse Loads Resistance Voltage (Ohms ) (Volts) O. 545 O. 376 O. 304 O. 204 22.0 21.0 20 .o 18.0 I 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection - Unless otherwise specified in the contract or purchase order, the supplie
38、r is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified, the supplier may .utilize his own facilities or any commercial laboratory acceptable to the Government. inspections set forth in the specification where such inspections are deemed
39、 ecessary to assure that supplies and services conform to prescribed requirements. 4.1.1 Classification of Tests - Items covered by this specification shall be c The Government reserves the right to perform any of the subjected to the following tests to determine compliance with all applicable requi
40、rements : (1) Preproduction (First Article) Tests (2) Initial Production Tests (3) Acceptance Tests I 141 Life Test I A 7 Prenrnrliirtinn FirSt Article1 Teqts - Prenrodiiction tests shall he conducted by ihe contractor on an equipment representative of the production equipments to be supplied under
41、the contract. accomplished under the approved test procedure of 4.6. and the procuring activity shall be advised when tests are to be conducted so that a government representative may be designated to witness or supervise the tests when so desired. Contractors not having adequate facilities to condu
42、ct all required tests shall obtain the services of a commercial testing laboratory acceptable to the Government. Preproduction tests shall be The Government Inspector I 4.2.1 Preproduction (First Article) Test Data - The contractor shall submit Provided by IHSNot for ResaleNo reproduction or network
43、ing permitted without license from IHS-,-,-MIL-T-837b 58 m 9999906 0372087 3 m MIL-T- 8 1768 (AS) 4.2.2 Scope of Tests - Preproduction tests shall include all tests deemed necessary by the procuring activity to determine that the equipment meets all the requirements of this specification , other app
44、licable specifications and the contract. Preproduction tests shall include environmental tests in accordance with the procedures of MIL-T-5422 and interference tests in accordance with MIL-STD-461. 4.2.3 Preproduction Approval - Approval of the preproduction sample shall be by the procuring activity
45、 upon satisfactory completion of all tests. No production equipments shall be delivered prior to the approval of the preproduction sample. Prefabrication of production equipment prior to the approval of the preproduction sample is at the contractors own risk. retained by the contractor for his use i
46、n the fabrication and testing of equipment to be submitted for acceptance. as one of the equipments under the contract. The approved preproduction sample shall be The preproduction sample shall not be considered 4.2.4 Production Equipments - Equipments supplied under the contract shall in all respec
47、ts , including design , construction , workmanship , performance and quality, be equivalent to the approved preproduction sample. Each equipment shall be capable of successfully passing the same tests as imposed on the preproduction sample. rejection of an equipment and of equipment already accepted
48、 by the Government. shall be the obligation of the contractor to make necessary corrections as approved by the procuring activity. Evidence of non-compliance with the above shall constitute cause for It 4.3 Initial ProductionTests - One of the first ten production equipments shall be selected and se
49、nt. at the contractors expense to a designated Government laboratory for tests. This equipment shall be selected by the procuring activity after the equipment has successfully passed all individual tests. No other tests shall be conducted on the equipment prior to starting the Initial Production Tests. The preproduction sample shall not be selected for this test. Scope of Tests - This equipment may be subjected to any and all tests the procuring activity deems
