POTENTIAL TRANSFORMER OF BUSHING TYPE

• Main Author: OONO TAKAHISA
• Format: Patent
• Language: English
• Published: 18.07.1984
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

PURPOSE:To obtain the correct allotted voltage of the titled device by a method wherein the allotted voltage of the capacitor type bushing to be determined according to main electrostatic capacity and potential dividing electrostatic capacity is converted into intensity of light using a voltage-light converting element, and the optical signal thereof is transmitted to load according to an optical fiber. CONSTITUTION:An insulator is wound around the circumference of a core conductor 2a enfolding capacitor electrodes 4 of the plural number of sheets to generate main electrode capacity 3a and potential dividing electrostatic capacity 3b. Then the outermost layer electrode 4a of the capacitor electrodes 4 forming capacity 3b is connected to a voltage terminal 6, and the outermost layer electrode 4b of the electrodes 4 forming capacity 3b is earthed. Then an electricity-light converting element 13 consisting of a photo diode, etc., is connected to the terminal 6, and an optical fiber 17 having optical connectors 16a, 16b at both ends is connected thereto. After then, a photo-electricity converting element 15 is connected to the connector 16b side, and after output thereof is amplified by an amplifier 14, it is supplied to load 11. Accordingly, electrostatic capacitance at the part other than the bushing can be ignored, and a correct allotted voltage can be obtained.