| 摘要 |
A high-voltage vacuum circuit breaker consists of a case, poles secured to the case and provided with arc-extinguishing chambers having fixed and movable contacts situated inside of each chamber, last one is connected to a traction insulator provided with pressure springs, an electromagnetic drive and an actuating mechanism mounted inside the case, a switching unit, a control unit, interlock contacts of switch condition, a capacitor, a manual shutoff mechanism are linked with the said drive. The magnetic core secured in body inside comprises a central hole for rod location made of non-magnetic material, and a collar situated in the middle of its outer surface. Actuating and switch-off coils are fixed between the case and the magnetic core with forming a gap between the last one and case inside. Constant magnets are positioned in the said gap along diameter of magnetic core collar. The rod is made with disk-like armatures secured to opposite parts, diameters of which correspond to collar diameter. Rod length exceeds case height by rod preset travel. |
