PowerTips: Recommended Ratings for PF Improvement Capacitors

Monday, November 29, 2010

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

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