TABLE I. Electrical ratings.
1/
Secondary dc
Turns ratio
Circuit
Secondary
Primary
Primary
resistance (ohms)
Primary:secondary
diagram
Impedance (ohms)
Primary
unbalanced
dc
Dash
configura-
impedance
Series
Parallel
Series
Parallel
Secondary
Secondary
dc current
resistance
no.
tion
(ohms)
connec-
connec-
connec-
connec-
series
parallel
(mA)
(ohms)
tion
tion
tion
tion
connection
connection
001
20 ct
8 ct
2
30.0
2
1.2
.3
1.58:1
3.16:1
A
002
20 ct
20 ct
5
30.0
2
2.8
.7
1:1
2:1
"
003
32 ct
32 ct
8
23.0
3.3
4.5
1.13
1:1
2:1
"
004
40 ct
40 ct
10
21.0
3.7
5
1.25
1:1
2:1
"
005
48 ct
16 ct
4
19.0
3.75
3
.75
1.73:1
3.46:1
"
006
50 ct
50 ct
12.5
19.0
5
7
1.75
1:1
2:1
"
007
80 ct
32 ct
8
15.0
7.6
4.3
1.13
1.58:1
3.16:1
"
008
100 ct
40 ct
10
13.0
10.8
5
1.25
1.58:1
3.16:1
"
009
100 ct
100 ct
25
13.0
10.8
12
3
1:1
2:1
"
010
120 ct
12.8 ct
3.2
12.0
9.3
2.2
.55
3.06:1
6.12:1
"
011
120 ct
60 ct
15
12.0
9
7.2
1.8
1.41:1
2.83:1
"
012
120 ct
120 ct
30
12.0
11.6
13
3.3
1:1
2:1
"
013
150 ct
12 ct
3
11.0
11.2
2.2
.55
3.54:1
7.08:1
"
014
150 ct
50 ct
12.5
11.0
13
6.8
1.7
1.73:1
3.46:1
"
015
150 ct
100 ct
25
11.0
13
11.8
3
1.22:1
2.45:1
"
016
150 ct
150 ct
37.5
11.0
13
18.3
4.6
1:1
2:1
"
017
150 ct
600 ct
150
11.0
13
75
19
1:2
1:1
"
018
200 ct
200 ct
50
10.0
19
21.3
5.4
1:1
2:1
"
019
300 ct
12 ct
3
8.0
24
1.7
.43
5:1
10:1
"
020
300 ct
50 ct
12.5
8.0
30
6.8
1.7
2.45:1
4.9:1
"
021
300 ct
150 ct
37.5
8.0
30
18
4.6
1.41:1
2.83:1
"
022
300 ct
300 ct
75
8.0
30
34
8.5
1:1
2:1
"
023
300 ct
600 ct
150
8.0
30
60
15
1.1:41
1.41:1
"
024
320 ct
12.8 ct
3.2
7.5
31
1.7
.43
5:1
10:1
"
025
400 ct
40 ct
10
7.0
41
4.5
1.13
3.16:1
6.23:1
"
026
400 ct
120 ct
30
7.0
41
12
3
1.83:1
3.65:1
"
027
400 ct
200 ct
50
7.0
41
21.3
5.4
1.41:1
2.83:1
"
028
400 ct
400 ct
100
7.0
41
37.5
9.4
1:1
2:1
"
029
400 ct
1000 ct
250
7.0
41
96
24
1:1.58
1.26:1
"
030
400 ct
2000 ct
500
7.0
41
212
53
1:2.24
1:1.12
"
031
400 ct
4000 ct
1000
7.0
41
375
94
1:3.16
1:1.58
"
032
500 ct
12.8 ct
3.2
6.0
48
1.7
.43
6.25:1
12.5:1
"
033
500 ct
16 ct
4
6.0
48
1.9
.5
5.6:1
11.2:1
"
034
500 ct
50 ct
12.5
6.0
39
6.8
1.7
3.16:1
6.32:1
"
035
500 ct
150 ct
37.5
6.0
48
18
4.6
1.83:1
3.65:1
"
See footnotes at end of table.
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