Brochure

33
5/98
© 1998 Square D All Rights Reserved
Thermal Unit Selection
Tables 72 thru 77
Table 76
Motor Full-Load
Current (Amp)
Thermal Unit
Number
19.9-20.8
20.9-22.2
22.3-23.8
FB 26.7
FB 28.3
FB 29.6
23.9-25.4
25.5-27.2
27.3-29.2
FB 30.5
FB 32.6
FB 34.1
29.3-31.9
32.0-33.8
33.9-36.1
FB 38.3
FB 40.2
FB 42
36.2-38.5
38.6-41.4
41.5-43.6
FB 44
FB 46
FB 48
43.7-45.9
46.0-48.2
48.3-50.7
FB 50.5
FB 52.5
FB 55.5
50.8-53.9
54.0-56.7
56.8-60.8
FB 58
FB 60
FB 63.5
60.9-67.6
67.6-73.6
73.7-82.9
FB 69
FB 77
FB 84
83.0-86.0 FB 92
T
a
bl
e
74
Motor Full-Load
Current (Amp)
Thermal
Unit
Number
1 T. U. 3 T. U.
2.23-2.47
2.48-2.76
2.77-3.04
2.23-2.47
2.48-2.76
2.77-3.04
FB 3.33
FB 3.71
FB 4.1
3.05-3.24
3.25-3.61
3.62-4.19
3.05-3.24
3.25-3.61
3.62-4.19
FB 4.5
FB 4.75
FB 5.3
4.20-4.62
4.63-5.14
5.15-5.39
4.20-4.62
4.63-5.14
5.15-5.39
FB 6.1
FB 6.75
FB 7.45
5.40-5.69
5.70-5.99
6.00-6.29
5.40-5.69
5.70-5.99
6.00-6.29
FB 7.8
FB 8.21
FB 8.6
6.30-6.64
6.65-6.99
7.00-7.39
6.30-6.64
6.65-6.99
7.00-7.39
FB 9.0
FB 9.5
FB 10
7.40-7.79
7.80-7.94
7.95-8.49
7.40-7.79
7.80-7.94
7.95-8.49
FB 10.6
FB 11.2
FB 12.1
8.50-8.99
9.00-9.59
9.60-10.1
8.50-8.99
9.00-9.59
9.60-10.1
FB 13.1
FB 13.9
FB 14.8
10.2-10.6
10.7-11.3
11.4-12.0
10.2-10.6
10.7-11.3
11.4-12.0
FB 15.6
FB 16.4
FB 17.6
12.0-12.6
12.7-13.8
13.9-14.7
....
....
....
FB 18.4
FB 19.4
FB 21.1
14.8-15.2
15.3-16.2
16.3-18.0
....
....
....
FB 22.6
FB 23.6
FB 24.8
Following Selections for Size 1
Only.
....
....
13.9-14.7
12.0-12.6
12.7-13.8
13.9-14.7
FB 18.4
FB 19.4
FB 21.1
14.8-15.2
15.3-16.2
16.3-17.4
14.8-15.2
15.3-16.2
16.3-17.4
FB 22.6
FB 23.6
FB 24.8
17.5-18.5
18.6-19.6
19.7-20.2
17.5-18.5
18.6-19.6
19.7-20.2
FB 26.7
FB 28.3
FB 29.6
20.3-21.5
21.6-22.4
22.5-23.2
20.3-21.5
21.6-22.4
22.5-23.2
FB 30.5
FB 32.6
FB 34.1
23.3-24.3
24.4-25.4
25.5-26.0
23.3-24.3
24.4-25.4
25.5-26.0
FB 35
FB 36.6
FB 38.3
T
a
bl
e
75
Motor Full-Load
Current (Amp)
Thermal Unit
Number
3.22-3.57
3.58-4.14
4.15-4.56
FB 4.75
FB 5.3
FB 6.1
4.57-5.10
5.11-5.39
5.40-5.64
FB 6.75
FB 7.45
FB 7.8
5.65-5.96
5.97-6.25
6.26-6.58
FB 8.21
FB 8.6
FB 9.0
6.59-6.91
6.92-7.41
7.42-7.82
FB 9.5
FB 10
FB 10.6
7.83-8.32
8.33-8.89
8.90-9.47
FB 11.2
FB 12.1
FB 13.1
9.48-10.0
10.1-10.5
10.6-11.1
FB 13.9
FB 14.8
FB 15.6
11.2-12.0
12.1-12.7
12.8-13.5
FB 16.4
FB 17.6
FB 18.4
13.6-14.6
14.7-15.7
15.8-16.5
FB 19.4
FB 21.1
FB 22.6
16.6-17.4
17.5-18.8
18.9-20.1
FB 23.6
FB 24.8
FB 26.7
20.2-21.0
21.1-21.6
21.7-23.3
FB 28.3
FB 29.6
FB 30.5
23.4-24.3
24.4-25.0
25.1-26.3
FB 32.6
FB 34.1
FB 35
26.4-27.6
27.7-29.1
29.2-30.4
FB 36.6
FB 38.3
FB 40.2
30.5-32.0
32.1-33.3
33.4-35.2
FB 42
FB 44
FB 46
35.3-37.0
37.1-38.5
38.6-40.7
FB 48
FB 50.5
FB 52.5
40.8-45.0 FB 55.5
Table 77
Motor Full-Load
Current (Amp)
Thermal Unit
Number
48.0-50.9
51.0-53.7
53.8-57.0
FB 50.5
FB 52.5
FB 55.5
57.1-60.4
60.5-64.0
64.1-71.9
FB 58
FB 60
FB 63.5
72.0-83.9
84.0-93.1
93.2-104
FB 69
FB 77
FB 84
105-109
110-123
124-133
FB 92
FB 105
FB 115
T
a
bl
e
73
Motor Full-Load
Current (Amp)
Thermal
Unit
Number
1 T. U. 3 T. U.
2.42-2.67
2.68-3.00
3.01-3.36
2.42-2.67
2.68-3.00
3.01-3.36
FB 3.33
FB 3.71
FB 4.1
3.37-3.53
3.54-3.91
3.92-4.41
3.37-3.53
3.54-3.91
3.92-4.41
FB 4.5
FB 4.75
FB 5.3
4.42-4.83
4.84-5.45
5.46-5.89
4.42-4.83
4.84-5.45
5.46-5.89
FB 6.1
FB 6.75
FB 7.45
5.90-6.04
6.05-6.55
6.56-6.72
5.90-6.04
6.05-6.55
6.56-6.72
FB 7.8
FB 8.21
FB 8.6
6.73-7.00
7.01-7.39
7.40-7.54
6.73-7.00
7.01-7.39
7.40-7.54
FB 9.0
FB 9.5
FB 10
7.55-8.41
8.42-8.91
8.92-9.16
7.55-8.41
8.42-8.91
8.92-9.16
FB 10.6
FB 11.2
FB 12.1
9.17-10.0
10.1-10.3
10.4-11.4
9.17-10.0
10.1-10.3
10.4-11.4
FB 13.1
FB 13.9
FB 14.8
11.5-11.8
11.9-12.9
13.0-13.4
11.5-11.8
11.9-12.9
....
FB 15.6
FB 16.4
FB 17.6
13.5-14.2
14.3-15.1
15.2-18.0
....
....
....
FB 18.4
FB 19.4
FB 21.1
Following Selections for Size M-1
& M-1P Only.
....
....
....
11.5-11.8
11.9-12.9
13.0-13.4
FB 15.6
FB 16.4
FB 17.6
....
....
15.2-17.1
13.5-14.2
14.3-15.1
15.2-17.1
FB 18.4
FB 19.4
FB 21.1
17.2-18.0
18.1-18.9
19.0-19.7
17.2-18.0
18.1-18.9
19.0-19.7
FB 22.6
FB 23.6
FB 24.8
19.8-20.9
21.0-21.9
22.0-23.1
19.8-20.9
21.0-21.9
22.0-23.1
FB 26.7
FB 28.3
FB 29.6
23.2-24.3
24.4-25.5
25.6-26.0
23.2-24.3
24.4-25.5
25.6-26.0
FB 30.5
FB 32.6
FB 34.1
Following Selections for Size M-
1P Only.
26.1-26.8
26.9-27.3
27.4-28.7
....
....
....
FB 35
FB 36.6
FB 38.3
28.8-30.2
30.3-31.9
32.0-36.0
....
....
....
FB 40.2
FB 42
FB 44
T
a
bl
e
72
Motor Full-Load
Current (Amp)
Thermal
Unit
Number
1 T. U. 3 T. U.
2.38-2.62
2.63-2.94
2.95-3.31
2.38-2.62
2.63-2.94
2.95-3.31
FB 3.33
FB 3.71
FB 4.1
3.32-3.43
3.44-3.81
3.82-4.32
3.32-3.43
3.44-3.81
3.82-4.32
FB 4.5
FB 4.75
FB 5.3
4.33-4.75
4.76-5.38
5.39-5.75
4.33-4.75
4.76-5.38
5.39-5.75
FB 6.1
FB 6.75
FB 7.45
5.76-5.97
5.98-6.30
6.31-6.55
5.76-5.97
5.98-6.30
6.31-6.55
FB 7.8
FB 8.21
FB 8.6
6.56-6.89
6.90-7.14
7.15-7.36
6.56-6.89
6.90-7.14
7.15-7.36
FB 9.0
FB 9.5
FB 10
7.37-8.30
8.31-8.59
8.60-9.01
7.37-8.30
8.31-8.59
8.60-9.01
FB 10.6
FB 11.2
FB 12.1
9.02-9.68
9.69-9.99
10.0-10.9
9.02-9.68
9.69-9.99
10.0-10.9
FB 13.1
FB 13.9
FB 14.8
11.0-11.3
11.4-12.4
12.5-12.9
11.0-11.3
11.4-12.0
....
FB 15.6
FB 16.4
FB 17.6
13.0-14.0
14.1-14.5
14.6-15.7
....
....
....
FB 18.4
FB 19.4
FB 21.1
15.8-16.6
16.7-18.0
....
....
FB 22.6
FB 23.6
Following Selections for Size M-1
& M-1P Only.
....
....
11.4-12.4
12.5-12.9
FB 16.4
FB 17.6
....
....
....
13.0-14.0
14.1-14.5
14.6-15.7
FB 18.4
FB 19.4
FB 21.1
....
16.7-17.6
17.7-18.3
15.8-16.6
16.7-17.6
17.7-18.3
FB 22.6
FB 23.6
FB 24.8
18.4-19.4
19.5-20.5
20.6-21.7
18.4-19.4
19.5-20.5
20.6-21.7
FB 26.7
FB 28.3
FB 29.6
21.8-22.8
22.9-24.3
24.4-24.7
21.8-22.8
22.9-24.3
24.4-24.7
FB 30.5
FB 32.5
FB 34.1
24.8-25.4
25.5-26.0
24.8-25.4
25.5-26.0
FB 35
FB 36.6
Following Selections for Size M-
1P Only.
26.1-27.7
27.8-28.9
29.0-30.6
....
....
....
FB 38.3
FB 40.2
FB 42
30.7-32.5
32.6-36.0
....
....
FB 44
FB 46