| 摘要 |
FIELD: electricity. ^ SUBSTANCE: vacuum circuit breaker includes frame, common shaft with levers and insulating rods, phases installed on the frame and having the first and the second current leads fixed on insulators, vacuum arc-extinguishing chamber with spring opening mechanism of its movable contact and flexible conductor connected to it, disconnecting switch having movable and fixed contacts and creating insulating disconnection in series with open contacts of vacuum chamber; at that, fixed contact of disconnecting switch is fixed on the first current lead. On the frame there installed is shaft with earthing blades, and in each phase of the second current lead there fixed is bracket with axis, and with possibility of rotation around this axis, cam with lever and two insulating plates between which vacuum chamber with spring opening mechanism and movable contact of disconnecting switch, which is electrically connected to fixed contact of chamber, is fixed. Flexible conductor from movable contact of chamber is electrically connected to the second current lead. Spring opening mechanism of contacts is provided with roller contacting the cam the arm of which is connected to insulating rod with levers of circuit breaker shaft. Insulating plates are connected with additional insulating rods with earthing blades. ^ EFFECT: simplifying the design, increasing compactness and operation reliability of circuit breaker performing the functions of disconnecting switch and earth conductor as well. ^ 4 dwg |
