MIL-PRF-27/344C
REQUIREMENTS: (When numbers in parentheses, i.e., (1-2) are used, they indicate the winding and
the extreme terminals of the winding.)
Electrical ratings:
Primary voltage at 400 ±20 Hz
Wye connected (dash numbers 01 through 07).
(1-4): 115 V ac.
(2-4): 115 V ac.
(3-4): 115 V ac.
(1-2): 200 V ac.
(1-3): 200 V ac.
(2-3): 200 V ac.
Delta connected (dash numbers 08 through 14)
(1-2): 115 V ac.
(1-3): 115 V ac.
(2-3): 115 V ac.
Delta connected (dash numbers 15 through 21)
(1-2): 200 V ac.
(1-3): 200 V ac.
(2-3): 200 V ac.
Secondary voltage: See table I.
Secondary current: See table I.
Working voltage: 535 volts peak, maximum.
Design and construction:
Dimensions and configuration: See figure 1.
Duty cycle. Continuous.
Case: Epoxy fiberglass.
Terminals: Solderable turret type.
Height: 0.28 ±.040 inch (7.11 ±1.02mm).
Diameter: 0.090 ±.010 inch (2.29 ±0.25mm).
Weight: 1.3 pounds, maximum.
Operating temperature range. -55 to +130C.
Altitude: 70,000 feet.
Terminal strength: MIL-STD-202, method 211, test condition A, 5 pounds.
Dielectric withstanding voltage (Secondary connected wye):
At atmospheric pressure (each winding): 1500 volts rms.
At barometric pressure (each winding): 670 volts rms..
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