APPARATUS FOR DETECTING PARTIAL DISCHARGE

PURPOSE: A partial discharge detector apparatus is provided to detect the partial discharge of a transformer inside and to supply the insulating oil to the transformer and eject the insulating oil to the outside at the same time. The partial discharge detector apparatus does not need to attach or detach the partial discharge detector apparatus when supplying and ejecting the insulating oil, measures the partial discharge even when driving the transformer, minimizes the size of the apparatus while facilitating the supply and ejection of the insulating oil by optimizing the form of an insulating oil line, and maintain the optimal sensor sensitivity by precisely controlling the position of a sensing unit. CONSTITUTION: A partial discharge detector apparatus(100) comprises the followings: a main body part(120) bonded to a drain valve(200) including a hollow which is formed on one side of a transformer(300) and penetrating to the inside of the transformer; a sensing support stand(130) formed on the main body part, in order to insert to the hollow of the drain valve and the inside of the transformer; a sensing part(140) which is formed on one end of the sensing support stand, inserted to the inside of the transformer, and detecting the partial discharge signal in the transformer; an insulating oil line(170) formed in one end of the main body part(120), in order to make one end penetrating to the inside of the transformer, and the hollow of the drain valve; and a valve part(180) formed in the insulating oil line.