| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an instrument transformer, which is highly accurate and reliable and which can be manufactured inexpensively. SOLUTION: An instrument transformer comprises a high voltage electrode 1, a porcelain tube 2, a ground electrode 3, an electronic circuit board 5, an insulation gas 6, an intermediate electrode 7, a conductor 8, a support insulator 9, a temperature sensor 10, and a gas pressure sensor 11. An end of the electrode 3 is contained inside the electrode 1, thereby forming an enclosed region A extending in the axial direction of the tube 2. Inside the region A, the electrode 7 is attached to the outer surface of the end of the electrode 3, which faces the electrode 1. The electrode 3 is arranged to pass through the tube 2, and its portion passing through the tube 2 is 50 mm or smaller in diameter. The board (output converting section) 5 is located on the side of the ground potential of the tube 2 and is connected to the voltage of the electrode 7 via the conductor 8 passing through the electrode 3, whereby the electrode 7 is used as a voltage detecting section.</p> |
