TABLE I. Electrical ratings.
1/
Secondary
Power
Secondary dc
Impedance
(watts)
resistance
Turns ratio
Dash
(ohms)
Primary
(ohms)
primary:secondary
Primary
Primary
Circuit
400
150
no.
Imped-
unbal-
dc
diagram
1 kHz
Series
Parallel
Series
Parallel
Secondary
Secondary
Hz
Hz
ance
anced
resistance
configu-
and
connec- connec-
connec-
connec-
series
parallel
And
And
(ohms)
dc current
(ohms)
ration
higher
tion
tion
tion
tion
connection
connection
higher
higher
(mA)
001
20 ct
8 ct
2
1.0
.75
.11
22.0
1.75
1.0
.25
1.58:1
3.16:1
A
002
20 ct
20 ct
5
1.0
.75
.11
22.0
1.75
2.5
.63
1:1
2:1
"
003
32 ct
32 ct
8
1.0
.75
.11
18.0
2.7
3.7
.93
1:1
2:1
"
004
40 ct
40 ct
10
1.0
.75
.11
16.0
3
5.2
1.3
1:1
2:1
"
005
48 ct
16 ct
4
1.0
.75
.11
13.0
4.5
2.4
.6
1.73:1
3.46:1
"
006
50 ct
50 ct
12.5
1.0
.75
.11
13.0
4.5
6.2
1.6
1:1
2:1
"
007
80 ct
32 ct
8
1.0
.75
.11
11.0
6.6
3.7
.93
1.58:1
3.16:1
"
008
100 ct
40 ct
10
1.0
.75
.11
10.0
9.7
5.6
1.4
1.58:1
3.16:1
"
009
100 ct
100 ct
25
1.0
.75
.11
10.0
9.7
11
2.8
1:1
2:1
"
010
120 ct
12.8 ct
3.2
1.0
.75
.11
9.0
10.8
1.6
.4
3.06:1
6.12:1
"
1.0
.75
.11
011
120 ct
60 ct
15
9.0
10.8
8.5
2.2
1.41:1
2.83:1
"
1.0
.75
.11
012
120 ct
120 ct
30
9.0
10.8
15
3.8
1:1
2:1
"
1.0
.75
.11
013
150 ct
12 ct
3
8.0
13.5
1.75
.44
3.54:1
7.08:1
"
1.0
.75
.11
014
150 ct
50 ct
12.5
8.0
12
5.8
1.5
1.73:1
3.46:1
"
1.0
.75
.11
015
150 ct
100 ct
25
8.0
12
13
3.3
1.22:1
2.44:1
"
016
150 ct
150 ct
37.5
1.0
.75
.11
8.0
12
20
5
1:1
2:1
"
017
150 ct
600 ct
150
1.0
.75
.11
8.0
12
32
20.5
1:2
1:1
"
018
200 ct
200 ct
50
1.0
.75
.11
7.0
17
24
6.0
1:1
2:1
"
019
300 ct
12 ct
3
1.0
.75
.11
5.0
30
1.75
.44
5:1
10:1
"
020
300 ct
50 ct
12.5
1.0
.75
.11
5.0
27
6.2
1.6
2.45:1
4.9:1
"
1.0
.75
.11
021
300 ct
150 ct
37.5
5.0
26
21
5.3
1.41:1
2.83:1
"
1.0
.75
.11
022
300 ct
300 ct
75
5.0
27
38
9.5
1:1
2:1
"
1.0
.75
.11
023
300 ct
600 ct
150
5.0
27
66
17
1.1:41
1.41:1
"
1.0
.75
.11
024
320 ct
12.8 ct
3.2
5.0
30
1.75
.44
5:1
10:1
"
1.0
.75
.11
025
400 ct
40 ct
10
5.0
39
4.3
1.1
3.16:1
6.23:1
"
026
400 ct
120 ct
30
1.0
.75
.11
5.0
30
14
3.5
1.83:1
3.65:1
"
027
400 ct
200 ct
50
1.0
.75
.11
5.0
39
24
6
1.41:1
2.83:1
"
028
400 ct
400 ct
100
1.0
.75
.11
5.0
39
42
10.5
1:1
2:1
"
029
400 ct
1000 ct
250
1.0
.75
.11
5.0
39
109
28
1:1.58
1.26:1
"
030
400 ct
2000 ct
500
1.0
.75
.11
5.0
39
198
49
1:2.24
1:1.12
"
031
400 ct
4000 ct
1000
1.0
.75
.11
5.0
39
436
109
1:3.16
1:1.58
"
032
500 ct
12.8 ct
3.2
1.0
.75
.11
4.5
43
1.6
.4
6.25:1
12.5:1
"
033
500 ct
16 ct
4
1.0
.75
.11
4.5
43
2.3
.54
5.6:1
11.2:1
"
034
500 ct
50 ct
12.5
1.0
.75
.11
4.5
43
5.8
1.5
3.16:1
6.32:1
"
035
500 ct
150 ct
37.5
1.0
.75
.11
4.5
43
19.8
5
1.83:1
3.65:1
"
See notes at end of table.