MIL-PRF-27/71E
REQUIREMENTS: (When numbers in parentheses, i.e., (1-3) are used, they indicate the winding and the extreme
terminals of the windings.)
Electrical ratings: See table I.
Working voltage: 175 volts.
Frequency range: 300 hertz to 100 kilohertz (except 300 hertz to 20 kilohertz for M27/71-01 and M27/71-02).
TABLE I. Electrical ratings.
Primary
Secondary
Primary
Primary power
Primary
Secondary
unbalanced
Circuit
DCR
DCR
level
impedance
impedance
Dash
DC current
diagram
ohms
ohms
At 300 Hz mW
ohms
ohms
number
mA
(see figure 1)
±25%
±25%
(Max)
(1-3)
(4-6)
(Max)
01
A
100 k CT
1 k CT
2,900
10
60
0
02
A
25 k CT
1,000 CT
2,500
10
140
0
03
A
10 k CT
10 k CT
1,000
30
1,300
1.0
04
A
10 k CT
1,500 CT
1,000
30
165
1.0
05
A
10 k CT
600 CT
1,000
30
65
1.0
06
A
4,000 CT
10 k CT
440
30
1,300
1.5
07
A
1,000 CT
600 CT
100
30
65
3.0
08
B
1,000 CT
4
100
30
0.45
3.0
09
A
600 CT
25 k CT
65
30
3,300
4.0
10
4.0
A
600 CT
600 CT
65
30
65
11
4.0
B
600 CT
60
65
30
7
12
4.0
B
600 CT
4
65
30
0.45
Design and construction:
Dimensions and configuration: See figure 1.
Duty cycle: Continuous.
Case: Encapsulated.
Material: Plastic.
Terminals: Pin (printed circuit).
Material: Nickel iron alloy tin plated.
Diameter: 0.030 ±0.005 inch.
Length: 0.500 ±0.030 inch.
Weight: 5.10 grams, maximum.
Altitude: 70,000 feet maximum.
Operating temperature range: -55°C to +130°C.
3
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