PROTECTIVE RELAY DEVICE

PROBLEM TO BE SOLVED: To provide a protective relay device which improves the fixing force between a relay unit and a case, in regard to a protective relay device where a relay unit can be inserted into or extracted from a case. SOLUTION: In the protective relay device, where the relay unit 10 with a built-in protective relay can be inserted into or extracted from the unit insertion part 21 of the case and the terminal block connector 12 of the relay unit is connected with a terminal block connector, the relay unit is equipped with a front part 14; which has area larger than that of the unit insertion part of the case, when viewed from its front side and an insertion/extraction support lever 13 which is turnable at inserting/extracting action to the unit insertion part. The case is equipped with an engagement part which can catch the insertion/extraction support lever, and the front of the relay unit is provided with an opening which enables the rotation of the insertion/extraction support lever. It is equipped with a cover which covers this opening, and is equipped with a coupling means which couples this cover with the engaging part of the case. COPYRIGHT: (C)2007,JPO&INPIT