MIL-T-27/2658
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) 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 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 terminals 3 and 11 connected (3 and 9 connected). Temperature rise: 50°C with 56 V, 3.7 kHz across (1-3) at an ambient temperature of 80°C. 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 213, test condition H.
VERIFICATION:
Qualification inspection: Not applicable.
Quality conformance inspection: Groups A and 8 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 terminals 11 and 12 to verify the turns ratio. Turns ratio must not deviate more than 5 percent from calculated value.
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