DLA MIL-T-27 295 C-2012 TRANSFORMER POWER STEP-DOWN.pdf

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1、AMSC N/A FSC 5950 MIL-T-27/295C 8 June 2012 SUPERSEDING MIL-T-27/295B 20 April 1993 MILITARY SPECIFICATION SHEET TRANSFORMER, POWER, STEP-DOWN This specification is approved for use by all Depart- ments and Agencies of the Department of Defense. The complete requirements for acquiring the products d

2、escribed herein shall consist of this document and the latest issue of specification MIL-PRF-27. NOTES: 1.Dimensions are in inches. 2.Metric equivalents are given for information only. 3.Unless otherwise specified, tolerances are .005 (0.13 mm) for three-place decimals and .03 (0.8 mm) for two-place

3、 decimals. 4.Tolerance on terminal position dimensions is .015 (0.38 mm). 5.Marking shall be on the top of the case. 6.Terminal numbers are not required. Terminal number 2 is indicated by white dot as shown. FIGURE 1. Dimensions and configurations. INCH-POUNDInches mm .02 0.5 .041 1.04 .125 3.18 .20

4、 5.1 .25 6.4 .28 7.1 .38 9.7 .72 18.3 .85 21.6 .94 23.9 1.06 26.9 1.25 31.8 WV: 443 V MAX ALTITUDE: 10,000 FT MAX CIRCUIT DIAGRAM AND MARKING Inactive for new design after 20 April 1993. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-27/295C 2

5、 REQUIREMENTS: (When numbers in parentheses, i.e., (1-2) are used, they indicate the winding and the extreme terminals of the windings.) Electrical ratings: Primary voltage (1-2): 115 volts rms, 60 Hz. Primary current (1-2): 0.035 ampere. Volt ampere: .66 voltampere. Secondary: (3-4): 4 volts, .035

6、ampere rms. (5-6): 4 volts, .035 ampere rms. Working voltage: 443 volts, maximum. Design and construction: Dimensions and configuration: See figure 1. Duty cycle: Continuous. Case: Encapsulated. Material: Epoxy. Terminals: Solder type. Material: Brass, tinned or silver plated. Height: .20 .03 inch.

7、Width: .041 .005 inch. Thickness: .02 .03 inch. Weight: 56 grams, maximum. Operating temperature range: +55C to +105C. Terminal strength: MIL-STD-202, method 211, test condition A, 2 pounds. Dielectric withstanding voltage (at sea level): 1,240 volts rms. Electrical characteristics: No load: With 15

8、 volts rms, 60 Hz across (1-2), current in (1-2) shall not exceed .024 ampere and the power in (1-2) shall not exceed .100 watts. Voltage across (3-4) and (5-6): 7.65 volts 5 percent. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-27/295C 3 Ra

9、ted load: With 15 volts rms, 60 Hz across (1-2) and 35 milliamperes resistive load in (3-4) and (5-6), the voltage across (3-4) and (5-6) shall be 4 volts 10 percent. DC resistance: (1-2): 157 ohms 20 percent. (3-4): 28.1 ohms 20 percent. (5-6): 27.9 ohms 20 percent. Polarity: Additive, with termina

10、ls 2, 3 and 5 connected. Temperature rise: 40C maximum with rated voltage and current at an ambient temperature of 65C. Shock (high impact): MIL-STD-202, method 207. VERIFICATION: Qualification inspection: Not applicable for this specification sheet. Conformance inspection: Groups A and B tests of M

11、IL-PRF-27 shall be applicable. Marking location: See figure 1. Part or Identifying Number (PIN): M27/295-01. 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

12、and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders 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 d

13、ocuments. In addition to MIL-PRF-27, this document references the following: MIL-STD-202 Custodians: Preparing activity: Army CR DLA CC Navy EC Air Force 85 (Project 5950-2009-084) DLA - CC Review activities: Army AR, MI Navy AS, MC, OS, SH Air Force 19, 99 NOTE: The activities listed above were int

14、erested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of this 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-,-,-