| 摘要 |
Test apparatus is provided for testing an electrical property, e.g. resistivity, dissipation factor or permittivity, of a fluid, such as insulating oil. The apparatus comprises an electrically conductive container 1 forming an outer electrode of a test cell for containing the fluid, an inner electrode 2 of the test cell, an inductive heating assembly 3 and a cooling means. The inner electrode is arranged to project into, and remain electrically isolated from, the electrically conductive container. The inductive heating assembly comprises an inductive heating coil 4, which surrounds the container, for heating the container and the inner electrode. The cooling means comprises an air channel 9 to allow passage of air across a surface of the electrically conductive container, for cooling of the container. A base member may support the electrically conductive container and may include means of directing fluid from the air channel to a drain passage (Fig 2). |
