Kiểm tra dựa trên đánh giá đặc tả kỹ thuật của bộ biến đổi oxit kim loại kẽm trong thiết bị chống sét điện áp cao 110 kV

• Ngôn ngữ: vie
• Ký hiệu phân loại: 537.4 Electricity and electronics
• Thông tin xuất bản: Khoa học và Công nghệ các trường đại học kỹ thuật, 2014
• Mô tả vật lý: 78-81
• Bộ sưu tập: Metadata
• ID: 506586

Tóm tắt

 This paper presents the results of experiment basea evaluation method for technical characteristics of metal oxides varistors zinc (V-MOV-ZnO) which makes up 110 kV surge arrester. All tests were implemented at the National Key Laboratory for High Voltage Techniques - Institute of Energy (HVLAB). The 8/20 uS standard lightning impluse current tests were performed to test for the residual voltage
  the voltage-current characteristics of metal oxides varistor zinc V-MOV-ZnO. Moreover, the voltage-current characteristics of V-MOV-ZnO was tested with 1mA current passed through resistor plate of V-MOV-ZnO. Once voltage applying to the V-MOV-ZnO is greater than Upeak, a small increasement of voltage will result in a very high current passing through the V-MOV-ZnO. This feature is used to discharge the lightning when very high transient over-voltage occurs. Upeak is reffered as a limit which must be taken into account when designing the V-MOV-ZnO arrester. All testing results practically allow to evaluate quality of the VMOV-ZnO on some aspects arrcording to lEG 60099-4 and to ensure the effectiveness of surge arrester if utilized.