Calculation of a Health Index of Oil-Paper Transformers Insulation with Binary Logistic Regression

Table 13

Data in [1].

Number	(ppm)	(mgKOH/g)	(kV)	(%)	(ppm)	(mg/L)
1	21.7	0.024	32.5	0.075	483	0.86
2	26.9	0.098	40.5	0.894	254	0.65
3	14.5	0.033	58	0.14	78	0.26
4	21.2	0.226	48.7	0.424	215	5.53
5	10	0.01	75	0.111	126	0.06
6	15.5	0.075	71	0.143	38	0.53
7	16.8	0.167	70.1	0.255	149	0.78
8	15	0.092	67.8	0.211	28	0.69
9	17	0.035	62.7	0.113	9	0.21
10	30	0.088	37.6	0.353	197	0.31
11	16.2	0.181	25.5	0.201	35	8.76
12	15	0.155	37.5	0.182	53	7.29
13	16.8	0.115	25.6	0.174	78	9.6
14	15	0.21	57.2	0.22	53	6.69
15	27.6	0.089	30.4	0.128	336	5.12
16	23.5	0.106	45.8	0.207	30	0.24
17	24.8	0.012	29.9	0.068	504	1.68
18	23.6	0.07	39.2	0.203	22	0.5
19	30.5	0.073	28.7	67	30	15.7
20	18.4	0.063	64.5	0.243	69	0.15
21	21.1	0.019	28.4	0.025	144	0.02
22	8.1	0.01	66.9	0.042	71	0.05
23	19.6	0.216	41.1	0.264	48	7.54
24	6	0.01	67.6	0.126	427	0.08
25	18.4	0.152	37.2	0.299	81	1.14
26	11.1	0.032	67.2	0.089	119	0.04
27	21.5	0.147	60.8	0.938	168	0.92
28	7.5	0.16	70.1	0.448	10	0.06
29	13	0.091	51.6	0.369	8	0.32
30	35.7	0.229	41.4	0.639	24	1.07

, , , , , and represent water content in oil, total acidity of oil, oil breakdown voltage, dissipation factor, DCG, and 2-Furfuraldehyde content, respectively.