HIGH-VOLTAGE CONTACT UNIT OF VACUUM BREAKER AND DISCONNECT SWITCH Russian patent published in 2018 - IPC H01H31/00 

FIELD: electricity.

SUBSTANCE: at the central axial bore of the cylindrical contact 6 a traction element 16 is provided with a radial protrusion 17. On the shank of the movable contact 9 of a vacuum chamber 8, the contact element 18 is fixed in the form of a cup, in which, in the "on" position, a contact portion of the movable contact 6 of cylindrical form is placed. The traction is L-shaped with a groove at the end, in which the radial protrusion 17 is located. In the traction element 16, the central axial bore is formed in which a part of the insulating traction 10 is disposed with a clearance. The stationary contact 19 of the disconnect switch is connected to the conductive element 20, and the latter, in turn, is connected to the branch line of the busbar. In the "on" position, the voltage to the busbars is fed through the closed contacts of the vacuum chamber 8, the shank 9 of the movable contact of the vacuum chamber 8, the contact element 18, the contact 6 of the disconnect switch, the stationary contact 19 of the disconnect switch, the conductive element 20, the branch line of the busbar. In case of issuing the command to switch-off, the traction 10 disconnects contacts of the vacuum chamber 8. Then, the contact 6 is lifted upward by the traction 7, bringing out of contact with the contact element 18 in the form of a cup of the vacuum chamber 8. The contacts and branch lines are located in a liquid dielectric medium.

EFFECT: arrangement of the vacuum chamber with its insulating traction, the movable and stationary contacts of the disconnect switch on the same axis made it possible to reduce the dimensions of the high-voltage contact unit of the vacuum breaker and the disconnect switch, and also to reduce by half the number of conducting elements and connections between them, which allowed to reduce the loss of electrical energy for heating.

3 cl, 5 dwg