|
|
Single Phase Single Operator
|
Three Phase Multi Operator
|
|
Welding Transformer Continuous Rating KVA
|
Required Capacitor Rating KVAR
|
Ampere /Number of Operators
|
Welding Transformer Continuous Rating KVA
|
Required Capacitor Rating KVAR
|
|
9
|
4
|
|
|
|
|
12
|
6
|
300/3
|
54
|
16.5
|
|
18
|
8
|
300/6
|
90
|
30
|
|
24
|
12
|
300/9
|
112
|
45
|
|
30
|
15
|
300/12
|
153
|
60
|
|
36
|
18
|
|
|
|
Power Capacitor Ratings for direct connections
KVAR rating when motor speed is
|
Motor
H.P
|
3000
r.p.m
|
1500
r.p.m
|
1000
r.p.m
|
750
r.p.m
|
500
r.p.m
|
|
2.50
|
1.00
|
1.00
|
1.50
|
2.00
|
2.50
|
|
5.00
|
2.00
|
2.00
|
2.50
|
3.50
|
4.00
|
|
7.50
|
2.50
|
3.00
|
3.50
|
4.50
|
5.50
|
|
10.00
|
3.00
|
4.00
|
4.50
|
5.50
|
6.50
|
|
15.00
|
4.00
|
5.00
|
6.00
|
7.50
|
9.00
|
|
20.00
|
5.00
|
6.00
|
7.00
|
9.00
|
12.00
|
|
25.00
|
6.00
|
7.00
|
10.00
|
10.50
|
14.50
|
|
30.00
|
7.00
|
8.00
|
10.00
|
12.00
|
17.00
|
|
40.00
|
9.00
|
10.00
|
13.00
|
15.00
|
21.00
|
|
50.00
|
11.00
|
12.50
|
16.00
|
18.00
|
25.00
|
|
60.00
|
13.00
|
14.50
|
18.00
|
20.00
|
28.00
|
|
70.00
|
15.00
|
16.50
|
20.00
|
22.00
|
31.00
|
|
80.00
|
17.00
|
19.00
|
22.00
|
24.00
|
34.00
|
|
90.00
|
19.00
|
21.00
|
24.00
|
26.00
|
37.00
|
|
100
|
21.00
|
23.00
|
26.00
|
28.00
|
40.00
|
|
110
|
23.00
|
25.00
|
28.00
|
30.00
|
43.00
|
|
120
|
25.00
|
27.00
|
30.00
|
32.00
|
46.00
|
|
130
|
27.00
|
29.00
|
32.00
|
34.00
|
49.00
|
|
140
|
29.00
|
31.00
|
34.00
|
36.00
|
52.00
|
|
145
|
30.00
|
32.00
|
35.00
|
37.00
|
54.00
|
|
150
|
31.00
|
33.00
|
36.00
|
38.00
|
55.00
|
|
155
|
32.00
|
34.00
|
37.00
|
39.00
|
56.00
|
|
160
|
33.00
|
35.00
|
38.00
|
40.00
|
57.00
|
|
165
|
34.00
|
36.00
|
39.00
|
41.00
|
59.00
|
|
170
|
35.00
|
37.00
|
40.00
|
42.00
|
60.00
|
|
175
|
36.00
|
38.00
|
41.00
|
43.00
|
61.00
|
|
180
|
37.00
|
39.00
|
42.00
|
44.00
|
62.00
|
|
185
|
38.00
|
40.00
|
43.00
|
45.00
|
63.00
|
|
190
|
38.00
|
40.00
|
43.00
|
45.00
|
65.00
|
|
200
|
40.00
|
42.00
|
45.00
|
47.00
|
67.00
|
|
250
|
48.00
|
50.00
|
53.00
|
55.00
|
76.00
|
The table is based on average conditions and efficiency to maintain a.p.f of 0.95 – 0.97 between 33.3% load to 125% and is applicable to motors of 220,415,440,2200 and 3300 Volts, 50 c/s.
|
