| 摘要 |
FIELD: high-voltage vacuum switch of polarized type (with a magnetic "trip") intended for switching of power high-frequency circuits at no-load. SUBSTANCE: electromagnet in the switch is positioned perpendicularly to the longitudinal axis of its vacuum switching part, the electromagnet core can move perpendicularly to this axis in plane coinciding with the direction of movement of the movable contact when it closes the circuit to the fixed contacts, and the contact pressure adjusting mechanism is made in the form of two threaded bushes of magnetosoft metal, for example, low-carbon steel, located coaxially on the center of the base of the electromagnet housing and rigidly secured in them coaxially with the core on its two opposite end faces; movable joint of the core to the vacuum switching part is made with the aid of a dog in the form of a straight rod, whose axis is positioned in the plane of movement of the movable contact perpendicularly to the core axis and coaxially with the longitudinal axis of the vacuum switching part; one end of the dog is rigidly secured in the core at an equal distance from its end faces, and the dog free end is movably joined to the insulator holder, for example, through a bush made of hard metal; the hole in the bush corresponds to the dog diameter and spherically rounded off over the whole contour. EFFECT: enhanced reliability of operation under the effect of acceleration of mechanical loads and enhanced stability of characteristics at continuous switching without increasing the mass and overall dimensions. |
