| 摘要 |
PURPOSE: A high voltage transformer for the transformation of a substation is provided to separate automatically and safely an elbow connector which is connected with an underground distribution line before an accident occurs, thereby preventing a secondary accident according to the decomposition of insulating oil. CONSTITUTION: A transformer unit (10) accommodates a high voltage transformer (12) in the inside. A bushing (16) is connected electrically to a primary side of the high voltage transformer. An elbow connector (20) is mechanically connected to the bushing and electrically connects the bushing and an underground distribution line. A first pressure coupling trigger module (30) starts first trigger action when the inner pressure of the transformer unit reaches a first pressure level. A second pressure coupling trigger module (30) starts second trigger action when the inner pressure of the transformer unit reaches a second pressure level. An alarm warning unit (50) starts alarm warning by being triggered according to the first trigger action of the pressure coupling trigger module. [Reference numerals] (12) High voltage transformer |
