1、AMSC N/A FSC 5950 INCH-POUND MIL-T-27/265B 16 November 2009 SUPERSEDING MIL-T-27/265A 13 March 1991 MILITARY SPECIFICATION SHEET TRANSFORMER, POWER, STEP DOWN AND STEP UP This specification is approved for use by all Depart- ments and Agencies of the Department of Defense. The requirements for acqui
2、ring the transformer described herein shall consist of this specification sheet and MIL-PRF-27. FIGURE 1. Dimensions and configurations. 2315 6 10 9 4 .50 .02 .25 .02 2.25 .02 1.7500 .016 .62 .03 NO. 8 -32 UNC-2B4 EA.3.22MAX.3.88 MAX.1 2 3 28 Vdc SQ. WAVE CIRCUIT DIAGRAM MARKING 12 3.7 kHz 4250 V Pk
3、. 1.5 mA 8 V Pk 2.5 A 9.6 V PK CT 0.5 A Working Voltage (1-3) 56 V Pk. (4-5) 9.6 V pk. (9-10) 8 V pk. (11-12) 4250 V pk. 2.50MAX.2.50MAX.406 10 11125 11 10 3 2 1 9 6 54 3.52 MAX.2.500 REF.2.500 .016Inactive for new design after 13 March 1991 Provided by IHSNot for ResaleNo reproduction or networking
4、 permitted without license from IHS-,-,-MIL-T-27/265B 2 Inches mm Inches mm .016 0.41 2.25 57.2 .02 0.5 2.500 63.5 .03 0.8 2.60 66.0 .25 6.4 2.69 68.3 .406 10.31 3.22 81.8 .50 12.7 3.52 89.4 .62 15.7 3.88 98.6 1.750 44.45 NOTES: 1. Dimensions are in inches. 2. Metric equivalents are given for genera
5、l information only. 3. Marking shall be on the side of the case. FIGURE 1. Dimensions and configurations Continued. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-27/265B 3 REQUIREMENTS: (When numbers in parentheses, such as (1-2) are used, th
6、ey indicate the winding and the extreme terminals of the winding.) Electrical ratings: 3.7 kHz, square wave. Primary (1-3): 56 V peak, 1.25 A, 35 volt-ampere. Secondary : (4-6): 9.6 V peak, 0.5 A rms. (9-10): 8 V peak, 2.5 A. (11-12): 4,250 V peak, 1.5 mA. Working voltage: (1-3): 56 V peak. (4-6): 9
7、.6 V peak, 0.5 A rms. (9-10): 8 V peak, 2.5 A. (11-12): 4,250 V peak, 1.5 mA. Design and construction: Dimensions and configuration: See figure 1. Duty cycle: Continuous. Case: Encapsulated. Material: Epoxy. Terminals: Flex leads in accordance with SAE-AS81044/6 (1-3): AS81044/6-20-* or equal. 1/ (4
8、-6), 11 and 12: ): AS81044/6-18-* or equal. 1/ (9 and 10): AS81044/6-18-* or equal. 1/ Height: (1): 10 inches, minimum. (2): 9.5 inches, minimum. (3): 11 inches, minimum. (4-9): 6.50 inches, minimum. (10): 7 inches, minimum. (11): 4.5 inches, minimum. (12): 5.5 inches, minimum. Weight: 2.5 pounds, m
9、aximum. Operating temperature range: -55C to +130C. Altitude: 10,000 feet, maximum. Terminal strength: MIL-STD-202, method 211, test condition A, 2.0 pounds. _ 1/ * Asterisks shall be replaced by color code designators in accordance with MIL-STD-681. Provided by IHSNot for ResaleNo reproduction or n
10、etworking permitted without license from IHS-,-,-MIL-T-27/265B 4 Dielectric withstanding voltage (each winding): At sea level: 11-9, 1, 4, and GND: 17.7 kV rms. 9-11: 13.4 kV rms. 1-4 and GND: 350 V. Electrical characteristics: 2/ No load: With 28 volts rms, 3.7 kHz across (1-2), the current in (1-2
11、) shall not exceed 400 mA rms and the power in (1-2) shall not exceed 11.2 watts. Voltage across: (1-3): .57 V 5 percent. (4-6): 0.102 V 5 percent. (9-10): .081 V rms 2.5 percent. Rated load: with 56 V peak, 3.7 kHz across (1-3), and the rated current on all secondaries. Voltage across: (4-5): 4.8 V
12、 peak 5 percent. (5-6): 4.8 V peak 5 percent. (9-10): 8 V peak 5 percent. (11-12): 8,500 V peak 3 percent. DC resistance: (1-3): 0.163 to 0.22 ohms. (4-6): 0.19 to 0.267 ohms. (9-10): 0.016 to 0.0265 ohms. (11-12): 2.2 k to 3.105k ohms. Polarity: Additive with terminals 3 and 4 connected and termina
13、ls 3 and 11 connected (3 and 9 connected). Temperature rise: 50C with 56 V, 3.7 kHz across (1-3) at an ambient temperature of 80C. Full load terminals are (4-6), (9-10), and (11-12). Vibration (high frequency): MIL-STD-202, method 204, test condition A. Shock (specified pulse): MIL-STD-202, method 2
14、13, test condition H. VERIFICATION: Qualification inspection: Not applicable. Quality conformance inspection: Groups A and B tests of MIL-PRF-27 shall be applicable. Marking location: See figure 1. Part or Identification Number (PIN): M27/265-01. _ 2/ Apply 45 V, 400 Hz sinusoidal voltage to termina
15、ls 11 and 12 to verify the turns ratio. Turns ratio must not deviate more than 5 percent from calculated value. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-27/265B 5 Changes from previous issue. The margins of this specification are marked
16、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. Bidders and contractors are cautioned to evaluate the requirements of this document based o
17、n 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 the following: MIL-STD-202 MIL-STD-681 SAE-AS81044/6 Custodians: Preparing activity: Army - CR DLA - CC Navy - EC Air For
18、ce - 85 (Project 5950-2009-003) DLA - CC 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 http:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
