1、MIL-T-bO207 57 W 777770b 007b7b 7 W A-39-09 y MIZ-T- 60207 (MU) 26 February 1965 SUPERSEDING FA(FC) -143 28 April 1961 MILITARY SPEC IF ICATION TRANSFORMER, POWER, STEP-DOWN: 10525910 1. SCOPE 1.1 This specification covers one type of transformer (Type Designation: TF5RX0122) used for Voltage regula
2、tion in the Gun Direction Computer: M18, 2, APPLICABLE DOCUMENTS 2.1 The following documents, of the issue in effect on date of imitation for bids or request for proposal, form a part of this specification Manufacturing Processes and Inspection of Sampling Procedure and Tables for Inspection Quality
3、 Assurance Terms and Definitions Test Methods for Electronic and Electrical by Attributes Component Parts DRAWINGS U. S. Army Munitions Command C10525910 Transformer, Power, Step-Down / 7 THIS DOCUMENT CONTAINS i0 PAGES Provided by IHSNot for ResaleNo reproduction or networking permitted without lic
4、ense from IHS-,-,-NIL-T-60207 57 m 7777706 007b7b7 7 m MIL-T- 60207 (MU) PACKAGING DATA SHEET MIL-P-l4232/P10525910 Packaging of Transformer, Power, Step-Down (Copies of specifications, standards, drawings, and packaging data sheets, re- quired by the suppliers in connection with specific procuremen
5、t functions should be obtained from the procuring activity or as directed by the contracting officer.) 3. REQUIREMENTS 3.1 Fabrication.- The transformer (Type Designation TF5RX0122) shall be manufactured in accordance with Drawing C10525910 and drawings pertaining thereto. 3.1.1 -Gase.and potting.-
6、The case shall be of molded flame resistant fiber glass and resin construction and shall be potted with a self-extinguishing, semi- flexible epoxy resin compound. 3.2 General specifications.- The transformer shall meet the requirements of MIL-T-27 for its particular type designation or classificatio
7、n. former shallialso meet the specified requirements of MIL-C-46357. The trans- (a) Installation of hardware (b) Securing leads (c) Soldering (d) Solvent vapor deereasing (e) Marking ink for non-metals (f) Application of decals (g) Twenty-four hour test procedure for transformers and inductors 3.2.1
8、 Order of precedence,- Should any conflict occur between the general specifications and the detailed specification the order of precedence shall be as follows: (a) Detailed specification (b) MIL-C-46357 (c) MIL-T-27 3.3 Environmental service conditions. 3.3.1 Vibration.- The transforher shall be sub
9、jected to a simple harmonic motion having an amplitude of 0.03 inch (0.06 inch total excursion), The fre- quency shall be varied uniformly from 10 to 55 cycles per second (cps) and return to 10 cycles. The motion shall be applied to the transformer for a period of 10 minutes in each direction of the
10、 3 mutually perpendicular axes (total of 30 minutes), relative to its normal operational position, Subsequent to vibration, the transformer shall not be damaged or adversely affected and shall meet the requirements of 3.4. This cycle shall be traversed in 1 minute 5 15 seconds. 3.3.2 Shock,- The tra
11、nsformer shall withstand 3 shock impulses in each of 3 mutually perpendicular directions. shall be 5 gravity units (Gs), 1 milliseconds. versely affected and shall meet the requirements of 3.4, 2. The acceleration of the shock impylses Pulse duration of each impulse shall be 11 Subsequent to shock t
12、he item shall not have been damaged or ad- - CI=- i , Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- -. - MIL-T-60207 57 W 7779706 0076770 5 3. MIL-T-60207 (MU) I- 3.3.3 Temperatures. 3.3.3.1 OP eratin.- The transformer shall meet the requirements
13、of 3.4 while exposed to an atmosphere with a relative humidity (RH) up to 97% at a temperature of 1350F. 3.3.4.2 Non-operating.- The transformer shall meet the requirements of 3.4 after exposure to (and when thoroughly dried) an atmosphere with a RH of 100 percent including condensation, for a-perio
14、d of 4 hours. 3.3.5 Fungus resistance.- The transformer shall show no evidence of damage and shall meet the requirements of 3.4, after being inoculated with the composite spore suspension specified in MIL-F-13926 and incubated at an ambient tempera- ture of between 77OF and 84OF with a RH of 97 a ba
15、rometric pressure of 28 to 32 inches of mercury; and a RH up to 90%. 3.4.1 Primary.- The primary rating shall be 208 volts, 3 phase, 400 cps, on terminals 1-2-3. 0.10 amp! Wye connection. ohms maximum, and 4.25 ohms minimum, Maximum no load loss, 10 watts; maximum no load current D.C. resistance sha
16、ll be between the limits of 5.75 3.4,2 Secondaries.- The rating of the secondaries shall be in accordance with the following tabulation, Voit (Line hps Volts (no load) Con- DC Resistance Working Teminal to Line) (nns) Max. Min. nection Max. Min, Volts Max. 4-5-6 15.5 0.77 16.4 15.6 Delta 0.32 0.22 3
17、0 7-8-9 6.3 0.64 6.63 6.37 Delta 0.14 0.10 11 10-11-12 ,24.3 1.7 25.5 24.5 Delta 0.26 0.18 45 13-14-15 20,6 0.96 21.8 20.8 Delta 0.45 0.31 35 16 Electrostatic Shield 17 Core ground 3.4.3 Insulation resistance,- Thp insulation resistance shall be 10,000 megohms minimum between each winding and the ot
18、her windings and mounting inserts. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-T-b0207 57 777906 007IJ73 7 MIL-T-60207 (MU) windings, electro-static shield and mounting inserts shall be as tabulated below: 3.4.4 Dielectric strength,- The die
19、lectric strength at sea level, between Terminal 1-2-3 4-5-6 7-8-9 10 -1 1-12 13-14-15 16 17 (Core ground) Dielectric Strength (rms) 850 500 500 500 500 500 500 3.4.5 Induced voltage.- The induced voltage shall be 416 volts rms, 800 cps, 3 phase, applied to tedinals 1-2-3. 3.4.6 Electro-static shield
20、.- The shieldings ratio shall be 4 to 1 or greater between any two windings at a frequency of 20 Kc. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility far inspection.- Unless otherwise specified in the con- tract or purchase order, ehe supplier is responsible for the performance of all inspection r
21、equirements as specified herein. supplier may utilize his own facitities or any comercial laboratory acceptable to the Government. The Government reserves the right to perform any of the in- spections set forth in the specification where such inspections are deemed ne- cessary to assure supplies and
22、 services conform to prescribed requirements. Except as otherwise specified, the 4.1.1 General provisions.- The component inspection requirements of MIL- F-13926 form a part of the Quality Assurance Provisions of this specification. Definitions of inspection terms shall be as listed in MIL-STD-109.
23、4.2 Inspection provisions. 4.2.1 Submission of Product.- Unless otherwise specified herein, or by the contracting officer, inspection lot size, lot formation and presentation of lots shall be in accordance with “SuDmission of Product“ as specified in MIL-STD- 105 4.2.2 Examinations and tests.- Excep
24、t where otherwise specified hyrein, * components and sub-assemblies shall be inspected- in accordance with the “inspec- tion provisions for components and sub-assemblies and the Sampling Plan Tables contained in MIL-F-13926. Examinations and tests related to Section 3 herein shall be performed in ac
25、cordance with Table I, II, and III and the test methods and procedures in 4.5. Examinations and tests for packaging, packing and mark- ing shall be in accordance with MIL-P-14232 and Section 5 herein. 4.2.3 Acceptance and reiection,- Rejected lots shall be screened for all defective characteristics,
26、 Removal or correction of defective units and resub- mittance of rejected lots shall be in accordance with “Acceptance and Rejection“ as specified in MIL-STD-105, 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-b0207 57 7777706 0076772 7 m MI
27、L-T-60207 (M;) All examinations and tests shall be conducted at the 4.2.4 Functional tests.- inspected on a 100% basis. standard ambient temperature (60 to 9O0F). The requirements and tests in Table 1 shall be TABLE I (100 percent inspection) Character is tic Requirement Test Procedures 101. Primary
28、 102. Secondaries 103. Insulation resistance 104. Dielectric strength 105. Induced voltage 106. Electro static shield 3.4.1 3.4.2 3.4.3 3.4.4 3.4.5 3.4.6 4.5.2.1 4.5.2.2 4.5.2.3 4.5.2.4 4.5.2.5 4.5.2.6 4.3 4.3.1 St andard s amp 1 ing , General.- One transformer shall be selected at random by a Gover
29、n- ment representative as a standard sample from each 100 produced. meet the requirements and tests in Table IT. The sample shall TABLE II Characteristics Requirements Test Procedures 301. Fabrication 302. General specifications 3.1 Applicable drawings - visual 3.2 .MfiL4T-21. and MIL-C-46357 4.3.2
30、Environmenta1.- Three units shall be selected atrandom by a Govern- ment representative as a standard sample from each 50 produced or from each months production, whichever occurs first, ments and tests in Table I and shall then meet the requirements and tests in Table III. The samples shall have me
31、t the require- TABLE III Characteristics Requirements Test Procedures 303. Vibration 304. Shock 305. Humidity-Operating 306. Humidity-Non-Operating 307. Operating temperature 308. Storage temperature 3.3.1. 4.5.1.1 3.3.2 4.5.1.2 3.3.4.2 4.5.1.3.1 3.3.3.1, 3.4 4.5.1.4, 4.5.2 3.3.3.2 4.5.1.5 3.3.4.1,
32、3.4 . 4.5.1.3.2, 4.5.2 4.3.3 Failure of sample.- Should any one item of a standard sampling fail to meet the specified test requirements, acceptance of the represented production lot will be suspended by the Government until necessary corrections have been made by the contractor and the gesubmitted
33、samples have .been approved (see 4.2.3). 5. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ML-T- 60207(MU) 414 Inspection euuivhent,- Except as otherwise provided for by the con- tract, the contractor shall supply equipment in accordance with the ap
34、plicable requirements of MiL-1-45607. equipment for its own independent inspections to the extent that such use will not unduly interfere with the contractors delivery schedule. .compatible with the “Teat Methods and Procedures“ specified in 4.5 and with the Component Inspectionf and “Test facilitie
35、s“ requirements of MIL-F-13926. tolerance of rest equipment is normally censidered to be within 10% of the pro- duct tolerance for.which it is intended, this inherent error in the test equip- ment design must be considered as part of the prescribed product tolerance limit. Thus, concept, conetmction
36、, materials, dimensions and tolerances used in the design of test equipment shall be so selected and conttolled as to insure that the test equipment will reliably indicate acceptability of a product which dues riot exceed 90% of the prescribed tolerance limit, when non-conforming, Construction shall
37、 be such as to facilitate routine cali- bration of test equipment. The Government reserves the right to use the test 4.4.1 Contractor desinn. - The contractor shall provide inspection equipment Since and permit positive rejection 4.4.1.1 Test equipment.- In conjunction with 4.4.1, the following test
38、 equipment shall be utilized in the performance of the applicable tests as speci- fied in 4.5: Item Number Description 1 2 3 Vacuum tube AC nus voltmeters, accuracy.+ 1 percent of full scale. AC rms annneters, accuracy & 1 percent of full scale. AC voltmeters dynamometer type, accuracy ? 112 percent
39、 of full scale. 4 AC wattmeters, dynamometer type, + 20 percent power factor, accuracy 5 2 percent of full scale, 5 Kelvin type resistance bridge. 6 Wheatstone type resistance bridge. 7 Oscilloscope, dual trace (two channel or switched), low frequency. 8 9 Dielectric strength (hi-pot) tester to oper
40、ate at 60 cps. 10 Megobeter, accuracy & 10 percent at 10,000 megohms. Variable frequency generator, accuracy.? 5 percent. 4.5 Test methods and vrocedures. 4e5.1 Environment al. 6.5.1.1 Vibration.- The vibration test shall be made on a device with means provided for measuring and controlling the dire
41、ction of vibration and ad- justing the amplitudes and frequencies to keep them within the specified limits of 3.3.1. measuring the vibration amplitude within plus or minus 5 percent, and capable of The measuring instruments of the testing device shall be capable of Provided by IHSNot for ResaleNo re
42、production or networking permitted without license from IHS-,-,- MIL-T-60207 59 W 997990b 007677L1 2 W MIL-T-60207 (MU) Measuring the frequency within plus or minus 2 percent. formed in accordance with the requirements apecif-ied in 3.3.1 with the trans- former rigidly mounted in its normal operatin
43、g position. tion test, the unit shall show no damage or defect resulting from the test when examined by visual and tactile means. fied in 4.5.1.2 prior to determining compliance with requirements specified under 3.4. The test shall be per- Subsequent to the vibra- The unit shall then be inspected as
44、 sped- 4.5.1.2 Shock.- This test shall be conducted in accordance with the condi- The transformer.shal1 be.subsequently tions of 3.3.2 and Proqedure II of the shock test defined in MIL-F-13926 except that impact shocks shall not exceed 5 Gs. inspected for physical damage or defects in compliance wit
45、h 3.3.2. shall then be inspeceed as specified in 4.5.1.3 prior to determinirig compliance with the requirements of 3.4 as required by 3.3.2. The unit 4.5.1.3.1 Non-operating.- This test shall be conducted in accordame with the conditions in 3.3.4.2 and the humidity test defined in Procedure I of MIL
46、-F- 13926 except that the 4-1/2 hour period shall be reduced to 2 hours, the 6 horir period reduced to 2 hours, and the total test period ahall not exceed 5.5 hours per cycle. test in 4.5.1.3.2 prior to meeting the specified requirements of 3.4 as required by 3.3.4.2. The unit shall then be thorough
47、ly dired and then subjected to the 4.5.1.3.2 Op eratinq.0 This test shall be conducted in accordance with the condigions in 3.3.4.1 and the humidity test defined in Procedure III of MIL-F- 13926 except that the humidity shall.be maintained at 97 2 5 percent for the 24 bur period, and the test shall
48、cease at the end of that period (Method 106 of- MIL-STD-202 shall be excluded). Throughout the test the unit shall be operated in accordance with 4.5.2 to determine compliance with 3.3.4.1. 4.5.1.4 Temperature.- (operating and storage): After being subjected to a3.1 environmental tests specified abo
49、ve, the unit shall be subjected to Test Pro- cedUre Ispecified in MIL-F-13926, except the temperatures specified in 3.3.3 shall.apply. While at the operating temperature of 3.3.3.1 the unit shall be tested in accordance with 4.5.1.4 to determine compliance with the requirements of 3.4.a required by 3.3.3.1. temperature (60 to 90F) and the unit shall be tested in accordance with 4.5.2 to determine compliance with 3.3.3.2. The t
