High-voltage interrupter device having combined vacuum and gas interruption

A hybrid interrupter device for high or medium voltage, the device comprising:

• a casing filled with a dielectric gas and having a longitudinal axis;
• a vacuum interrupter disposed inside the casing, and having a first pair of arcing contacts constituted by a first contact which is fixed and by a second contact which can be moved in translation in the longitudinal axial direction of the casing;
• means provided to exert a force on said second contact such that the mutual pressure between the contacting surfaces of said first and second contacts is greater than a determined value while said vacuum interrupter is allowing current to pass;
• a gas interrupter disposed inside the casing, and having a second pair of arcing contacts constituted by a third contact which is fixed and by a fourth contact which can be moved in translation in the longitudinal axial direction, and also having a blast chamber which comprises a thermal blast volume;
• and
• a drive rod connected to the fourth contact and that can be held stationary or moved in translation by control means;
• the device further comprising:
• connection means electrically interconnecting the second and third contacts, and capable of being moved in translation in the longitudinal axial direction together with the second contact;
• displacement means connected to said connection means and to said drive rod for displacing them so as to separate the second and fourth contacts from the first and third contacts respectively, said displacement means comprising dead-stroke link means connecting said connection means to said rod, the link means making it possible to displace said rod over a determined dead stroke while also acting on said connection means to keep the vacuum interrupter closed during this displacement.