MIL-T-27/1388
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 power: 585 watts each phase.
Primary voltage: (1-2) (5-6) (9-10): 226 volts rms ±5 percent, 400 Hz, 3-phase. Secondary voltage: (3-4) (7-8) (11-12): 14 volts rms, 40 amperes rms ±.5 volt. DC resistance:
(1-2) (5-6) (9-10): 0.5 ohm maximum. (3-4) (7-8) (11-12): 0.1 ohm maximum.
Working voltage:
(1-2) (5-6) (9-10): 335 volts maximum. (3-4) (7-8) (11-12): 175 volts maximum.
Design and construction:
Dimensions and configuration: See figure 1. Duty cycle: Continuous.
Case: Metal.
Terminals: Ceramic standoff type. Terminal height: 1.06 inch maximum.
Weight: 30 pounds maximum.
Operating temperature range: -55°C to +130°C.
Terminal strength: MIL-STD-202, method 211, test condition A, 5.0 pounds. Dielectric withstanding voltage:
At sea level:
(1-2) (5-6) (9-10): 1,000 volts dc. (3-4) (7-8) (11-12): 500 volts dc.
At barometric pressure:
(1-2) (5-6) (9-10): 900 volts dc. (3-4) (7-8) (11-12): 455 volts dc.
Electrical characteristics:
No load: With 226 volts rms, 400 Hz, 3-phase across (1-2) (5-6) (9-10).
Voltage across (3-4) (7-8) (11-12): 17 volts maximum.
Rated load: with 226 volts rms, 400 Hz, 3 phase across (1-2) (5-6) (9-10), the voltage across (3-4) (7-8) (11-12) shall be 14 volts ±0.5.
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