Tham khảo tài liệu 'properties and applications of silicon carbide part 10', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 262 Properties and Applications of Silicon Carbide Manufacturers A B C D Power frequency spark-over voltage kV Lightning spark-over voltage kV Positive Negative A7 193 227 227 A8 170 222 228 A9 178 225 224 B1 244 284 272 B2 246 279 272 B3 242 287 294 B4 233 234 225 B5 237 234 229 B6 241 271 269 B7 232 272 272 C1 226 382 354 C2 219 374 363 C3 224 364 359 C4 218 340 322 C5 188 349 344 C6 233 355 344 D1 274 374 367 D2 273 376 372 D3 268 376 366 D4 271 372 369 D5 262 378 369 Table 2. 138 kV surge arresters. Afterwards measurements of the total leakage current were carried out with the Ipeak values and the 3a H component being obtained. The phase difference between the total leakage current and the voltage applied to the sample was also determined. The results with the exclusion of samples A5 and A6 are shown in Table 3. Contribution to the Evaluation of Silicon Carbide Surge Arresters 263 Manufacturers A B C D Power frequency spark-over voltage kV Leakage current Phase difference degree Ipeak mA 3a H A1 134 F 89 A2 105 F 65 A3 85 F 54 A4 102 F 47 A7 193 F 85 A8 170 F 70 A9 178 F 71 B1 244 72 B2 246 70 B3 242 77 B4 233 68 B5 237 68 B6 241 63 B7 232 53 C1 226 73 C2 219 75 C3 224 79 C4 218 68 C5 188 F 83 C6 233 18 51 D1 274 89 D2 273 89 D3 268 F 82 D4 271 84 D5 262 F 78 Table 3. Leakage current .
