| 摘要 |
PURPOSE:To make it possible to detect and monitor the increase in the local temperature of the electric equipment enclosed in a hermetically closed container, by sealing a tracer material, which can perform detection separately from the insulating medium of the electric equipment, in a tracer container, which is opened at a specified temperature, and detecting said tracer material. CONSTITUTION:A screw hole 19 is provided at a part 16 in the vicinity of a current collector 15. The tracer container 17 is provided in the screw hole 19. The tracer container 17 has a hermetically sealed structure. When the insulating medium is air, oil, sulfur hexafluoride, or the like, carbon halide or hydrocarbon halide is sealed in the sealed space as the tracer material 18. A macromolecular compound or a low melting point alloy is used at a part 17d of a container wall 17c as a material, which is melted with the increase in temperature. By adequately selecting the material, which is melted with the increase in temperature and the tracer material 18, which performs detection, the detection of the local temperature increase can be facilitated. |
