MIL-T-27/1858
REQUIREMENTS: (When numbers in parentheses, such as (1-3) are used, they indicate the winding and the extreme terminals of the winding.)
Electrical ratings: See table I.
Primary inductance: 200/50 Henrys ct, minimum at 1 volt, 60 Hz. Primary level: 60 milliwatts at 400 Hz and 1.6 milliwatts at 60 Hz. Primary impedance:
(1-2-3): 10 K ohms ct. (3-4-5): 10 K ohms ct. (2-3-5): 10 K ohms ct.
Secondary impedance (6-7): 50 K ohms.
Primary resistance: 1,300/650 ct ohms ±25 percent. Secondary resistance: 1,900 ohms ±25 percent. Working voltage: 175 volts peak (1-2).
Frequency range: 60 to 400 hertz. Design and construction:
Dimensions and configuration: See figure 1. Duty cycle: Continuous.
Case: Metal encased, hermetically sealed.
Material: Cold-rolled steel.
Terminals: Solder lug, glass-to-metal seal.
Height: .313 ±.015 inch (7.95 ±0.38 mm). Weight: 4 ounces.
Terminal strength: MIL-STD-202, method 211, test condition A, 5.0 pounds. Dielectric withstanding voltage:
At sea level: 500 volts rms.
At reduced barometric pressure: 300 volts rms. Electrical characteristics:
No load (centertap voltage unbalance only): With 10 volts, 60 hertz and 0 amperes dc applied to
(1-5), unbalance (3-5) and (3-1), 1 percent maximum.
Polarity: Additive, with terminals 5 and 7 connected.
2
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