| 摘要 |
FIELD: machine building.SUBSTANCE: vacuum switch comprises a steel base with vertical ribs and horizontal racks on which at least two identical phase modules divided by vertical ribs are installed in the upper and middle part of the casing. In the lower part of the casing there are blocking and synchronising shafts common for all modules and at least one deflecting electromagnet. The blocking shaft is connected to the shaft of the deflecting electromagnet and is fitted by a lever to which one spring end is attached. The second end of the spring is fixed on the base. Each of the phase modules comprises the following units installed in the upper casing part: a vacuum chamber with a stationary contact and a movable contact, current leads, supporting and traction insulators set vertically along the central axis of the module, a rod, an opening spring and a loading spring mounted coaxial to the rod, and a separate-phase linear electromagnetic drive mounted in the middle part of the casing. A drive armature is placed in the inner cavity of a stator and is fixed on the rod. The stator is fitted by an axial vertical slot. A fixing pin fixed on the rod is set in the slot and is able of moving. Each rod is coupled to the traction insulator by its upper end. The lower end of the rod is equipped by a rolling bearing and rests against an eccentric installed on the common blocking shaft. Rods of all phase modules are fitted by linear gear rims made so that to be able of engagement with the gears installed on the common synchronising shaft.EFFECT: provision for reliable fixation of the switch status "ON" and reduced time for opening of contacts of its vacuum chambers.5 dwg |
