DLA MIL-T-27 202 B-2012 TRANSFORMERS POWER STEP-DOWN.pdf

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1、AMSC N/A FSC 5950 INCH-POUND MIL-T-27/202B 4 May 2012 SUPERSEDING MIL-T-27/202A 20 April 1993 MILITARY SPECIFICATION SHEET TRANSFORMERS, POWER, STEP-DOWN This specification is approved for use by all Depart- ments and Agencies of the Department of Defense. The complete requirements for procuring the

2、 transformer described herein shall consist of this document and the latest issue of specification MIL-PRF-27. Inactive for new design after 20 April 1993. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-27/202B 2 Inches mm Inches mm .005 0.13

3、.780 19.81 .030 0.76 1.125 28.58.031 0.79 1.281 32.54 .062 1.57 1.437 36.50.125 3.18 1.500 37.10 .157 3.99 1.657 42.09.188 4.78 1.750 44.45 .219 5.56 2.000 50.80.437 11.10 2.250 57.15 NOTES: 1. Dimensions are in inches. 2. Metric equivalents are given for information only. 3. Unless otherwise specif

4、ied, tolerance on case dimensions is .016 inch (0.41 mm). 4. Marking shall be on the sides of the case. FIGURE 1. Dimensions and configurations Continued Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-27/202B 3 REQUIREMENTS: (When numbers in p

5、arentheses, i.e., (1-2) are used, they indicate the winding and the extreme terminals of the windings.) Electrical ratings: Primary voltage (1-2-3): 105/115 volts, 380 Hz to 1,000 Hz. Primary current (1-3): 0.3 ampere rms, maximum. Voltampere rating: 34.7 voltamperes. Secondary voltage (4-6): 6.3 vo

6、lts ct. Secondary current (4-6): 5.5 amperes rms, maximum. Working voltage (peak): (1-3): 535 volts. (4-6): 1,070 volts. Design and construction: Dimensions and configuration: See figure 1. Duty cycle: Continuous. Case: Encapsulated. Material: Epoxy. Terminals: Solder terminal, Malco no. 1472 or equ

7、ivalent. Terminal height: .219 .062 inch. Weight: 260 grams, maximum. Operating temperature range: -55C to +130C. Terminal strength: MIL-STD-202, method 211, test condition A, 5 pounds. Dielectric withstanding voltage (at sea level): (1-3): 1,500 volts rms. (4-6): 2,500 volts rms. Electrical charact

8、eristics: No load: With 115 volts, 400 Hz across (1-3), current in (1-3) shall not exceed 100 milliamperes and the power in (1-3) shall not exceed 2 watts. Voltage across (4-6): 6.74 volts ct, 5 percent. Rated load: With 115 volts, 400 Hz across (1-3), the voltage across (4-6) shall be 6.3 volts ct,

9、 5 percent. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-27/202B 4 DC resistance: (1-3): 8.4 ohms, 20 percent. (4-6): 0.047 ohm, 20 percent. Polarity: Additive, with terminals 3 and 4 connected. Temperature rise: 55C with 115 volts rms, 400

10、Hz across (1-3) at an ambient temperature of 75C. Vibration, high frequency: MIL-STD-202, method 204. VERIFICATION: Qualification inspection: Not applicable. Conformance inspection: Groups A and B tests of MIL-PRF-27 shall be applicable. Marking location: See figure 1. Part or Identifying Number (PI

11、N): M27/202-01. Changes from previous issue. The margins of this specification are marked with vertical lines to indicate where changes 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. B

12、idders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. Referenced documents. In addition to MIL-PRF-27, this document references no other documents. MIL-STD-202

13、 Custodians: Preparing activity: Army - CR DLA - CC Navy - EC Air Force - 85 (Project 5950-2009-082) DLA CC Review Activities: Army AR, CR4, MI Navy AS, MC, OS, SH Air Force 19, 99 NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-