Temperature Effect on Electrical Treeing and Partial Discharge Characteristics of Silicone Rubber-Based Nanocomposites

Table 1

Summary of partial discharge statistical parameters.

Type of sample	PD characteristics	20°C			40°C			60°C
		Min	Max	Ave.	Min	Max	Ave.	Min	Max	Ave.
Neat SiR	Discharge magnitude (pC)	83	218	160	57	387	280	70	610	332
	Number of PDs (s^−1)	687	1244	952	117	7571	199	65	649	197
	Phase of occurrence of positive PDs (°)	34	41	37	36	60	44	44	93	55
	Phase of occurrence of negative PDs (°)	215	220	218	218	244	226	223	247	239
	Dissipated power (mW)	0.87	1.40	1.24	0.35	3.4	0.54	0.05	0.997	0.668
SiR/1 wt % oMMT	Discharge magnitude (pC)	31	641	450	5	492	294	137	478	257
	Number of PDs (s^−1)	249	1831	495	1	581	338	416	831	580
	Phase of occurrence of positive PDs (°)	33	86	44	36	61	47	34	44	38
	Phase of occurrence of negative PDs (°)	209	275	223	209	274	217	212	225	217
	Dissipated power (mW)	0.22	3.50	1.91	0.061	1.5	0.94	0.75	2.00	1.395
SiR/3 wt % oMMT	Discharge magnitude (pC)	2	45	22	2	6	4	2	11	4
	Number of PDs (s^−1)	1	643	181	1	64	27	1	25	4
	Phase of occurrence of positive PDs (°)	17	142	80	5	94	46	52	133	75
	Phase of occurrence of negative PDs (°)	154	306	280	177	272	226	164	265	222
	Dissipated power (µW)	0.34	163	35.7	0.002	3.7	1.13	0.03	0.98	0.15