| 摘要 |
PURPOSE:To remove inpurities in insulating oil under the operation of an electrostatic oil purifier, to increase the dielectric strength of a transformer, etc. and to improve reliability by disposing the oil purifier to a convection or circulation flow path for the insulating oil. CONSTITUTION:A self-cooled type radiator 36 is connected to a side section of the oil-filled self-cooled type transformer 30 through ducts 32,34 while the electrostatic oil purifier 38 is connected to another side section through an oil introducting pipe and an oil lead-out pipe 40, 42. The oil purifier 38 is formed in constitution in which vessels 44 having panel radiator-shaped forms as thin boxes are connected in three layers, terminals 46 for applying voltage are mounted at the top sections of each vessel 44, electrodes 48 separated from side walls are attached into the vessels 44, and the electrodes 48 are connected to the terminals 46. The terminals 46 are connected to a power supply device 50, the vessels 44 are grounded to ground potential by a grounding line 52, and a flow rate regulating valve is mounted at a preceding stage of the oil purifier 38. The impurities in the insulating oil are removed by means of the oil purifier 38, and the dielectric strength of the oil-filled electric apparatus such as the transformer 30 is increased. |
