Monday, November 29, 2010

Recommended Ratings for PF Improvement Capacitors

Recommended Power factor Improvement Capacitor Rating for Direct Connection to Induction Motors 


Capacitor Rating in kVAr when motor speed in RPM is
Motor Rating in HP
3000
1500
1000
750
600
500
2.5
1
1
1.5
2
2.5
2.5
5
2
2
2.5
3.5
4
4
7.5
2.5
3
3.5
4.5
5
5.5
10
3
4
4.5
5.5
6
6.5
12.5
3.5
4.5
5
6.5
7.5
8
15
4
5
6
7.5
8.5
9
17.5
4.5
5.5
6.5
8
10
10.5
20
5
6
7
9
11
12
22.5
5.5
6.5
8
10
12
13
25
6
7
9
10.5
13
14.5
27.5
6.5
7.5
9.5
11.5
14
16
30
7
8
10
12
15
17
32.5
7.5
8.5
11
13
16
18
35
8
9
11.5
13.5
17
19
37.5
8.5
9.5
12
14
18
20
40
9
10
13
15
19
21
42.5
9.5
11
14
16
20
22
45
10
11.5
14.5
16.5
21
23
47.5
10.5
12
15
17
22
24
50
11
12.5
16
18
23
25
55
12
13.5
17
19
24
26
60
13
14.5
18
20
26
28
65
14
15.5
19
21
27
29
70
15
16.5
20
22
28
31
75
16
17
21
23
29
32
80
17
19
22
24
30
34
85
18
20
23
25
31
35
90
19
21
24
26
33
37
95
20
22
25
27
34
38
100
21
23
26
28
35
40
105
22
24
27
29
36
41
110
23
25
28
30
38
43
115
24
26
29
31
39
44
120
25
27
30
32
40
46
125
26
28
31
33
41
47
130
27
29
32
34
43
49
135
28
30
33
35
44
50
140
29
31
34
36
46
52
145
30
32
35
37
47
54
150
31
33
36
38
48
55
155
32
34
37
39
49
56
160
33
35
38
40
50
57
165
34
36
39
41
51
59
170
35
37
40
42
53
60
175
36
38
41
43
54
61
180
37
39
42
44
55
62
185
38
40
43
45
56
63
190
38
40
43
45
58
65
195
39
41
44
46
59
66
200
40
42
45
47
60
67
205
41
43
46
48
61
68
210
42
44
47
49
61
69
215
42
44
47
49
62
70
220
43
45
48
50
63
71
225
44
46
49
51
64
72
230
45
47
50
52
65
73
235
46
48
51
53
65
74
240
46
48
51
53
66
75
245
47
49
52
54
67
75
250
48
50
53
55
68
76

Recommended Fuses, Cables and Contactors for Capacitors

Unit Rating (kVAr)
Rated current @ Rated voltage
Recommended
Cable size (sq.mm)
HRC fuse rating (A)
Contactor Rating (A)
415 V
440 V
Cu.
Al.
1
1.39
1.31
0.75
1.5
4
9
2
2.78
2.62
0.75
1.5
6
9
3
4.17
3.94
1
1.5
10
12
4
5.56
5.25
1
1.5
10
12
5
6.96
6.56
1.5
2.5
16
16
6
8.35
7.87
2.5
2.5
16
22
7
9.74
9.19
2.5
4
20
22
7.5
10.43
9.84
2.5
4
20
22
8
11.13
10.5
2.5
4
20
32
9
11.52
11.81
4
6
25
32
10
13.91
13.12
4
6
25
32
12.5
17.39
16.4
6
10
32
40
15
20.87
19.68
10
16
40
63
20
27.82
26.24
10
16
50
63
25
34.78
32.8
16
25
63
63
30
41.74
39.36
25
35
80
85