| 摘要 |
FIELD: electricity. ^ SUBSTANCE: device comprises vacuum arc-quenching chambers and an electromagnetic drive, a movable anchor of which is fixedly connected to a level, which is mechanically connected to movable contacts of arc-quenching chambers so that whenever contacts of the first arc-quenching chamber are open, contacts of the second arc-quenching chamber are closed, and vice versa, when contacts of the first arc-quenching chamber are closed, contacts of the second arc-quenching chamber are open. Fixed contacts of each pair of arc-quenching chambers are fixed on current-carrying buses at different sides of an insulation panel. Movable contacts of vacuum arc-quenching chambers are mechanically connected with a lever of a drive as capable of their displacement relative to the lever towards the side of closing with fixed contacts in the connected position of the electromagnet. All simultaneously connected movable contacts are electrically connected with one current-carrying bus with a terminal, which is connected with one phase of a power supply source, and all simultaneously open movable contacts are connected with the second current-carrying bus with a terminal, which is connected with the second phase of the power supply source. At the same time the insulation panel is mechanically connected to the base, where a drive electromagnet is fixed. ^ EFFECT: simplification of design and improved reliability of the device. ^ 2 dwg |
