RU1775741C - Rocking disconnector - Google Patents

Abstract

Usage: in electrical equipment and can be used in disconnectors of swinging and vertical-rotary types. SUMMARY OF THE INVENTION: a swing disconnector, in which the ends of the shaft of the insulators 6 are made in the form of axes on which the bearings of the earthing switches 11 are mounted, the latter being fixedly mounted on a traverse rigidly connected at its ends to the bearings. The disconnector frame 1 may also be provided with rigidly fixed axes on which bearings of the swinging insulators 2 and earthing switches 11.1 zp are mounted. f-ly, 2 ill.

Description

figs

The invention relates to an electrical appliance construction, and more particularly to swing type switchgear devices. It can also be used in vertical disconnect switches,

The purpose of the invention is to simplify the design, reduce material consumption and increase the reliability of the disconnector.

Figure 1 shows the disconnector, General view; figure 2 is the same, a top view.

The disconnector consists of a frame 1, on which fixed insulators 2 and 2 are mounted, at the top of which fixed contacts 3 and 3 are mounted. On the frame 1 there are bearings 4, in which a shaft 5 is mounted with swinging insulators 6 fixed on it, with movable contacts 7 on top. One fixed contact 3 is connected by a flexible electrical connection 8 with a movable contact 7.

At the ends 9 of the shaft 5, the bearings 10 of the ground electrodes 11 are located. The bearings 10 are rigidly connected to the traverse 12 to which the ground electrodes 11 are fixedly mounted.

The bearings 4 can be made in the form of a structural element of the frame 1, The ends 9 of the shaft 5 are made for installation and rotation in its own bearings 4, as well as the free rotation of the bearings 10 of the ground electrodes 11. The bearings 10 are fixed on the shaft 5 from longitudinal movements usually, for example, with distance bushings or cotter pins.

Bearings 10 can be made in the form of an arm (plate) with a sliding or rolling bearing pressed into it. Crosshead 12 in cross section can be made of any shape, proceeding from the condition of necessary rigidity and minimum material consumption, and at the ends it is rigidly connected, for example, by bolting to bearing brackets 10. In this case, crosshead 12 is shorter in length than shaft 5 (and shaft earthing switch compared to the prototype product).

The external busbar of the disconnector is connected to the fixed contacts 3 and 3.

The disconnector operates as follows. The disconnector is activated by the drive in the usual way - by turning the shaft 5 in the bearings 4.

When this occurs, the rotation (swinging) of the insulators 6, fixed motionless on the shaft 5, and the circuit is stationary: contacts 3 and movable contacts 7. Earthing switches 11

at the same time they are in the disconnected position and are held by their own drive, therefore, the ends 9 of the shaft 5 freely rotate also in the bearings 10 of the earthing switches 11. The disconnector is disconnected in the reverse order. The earthing switches 11 are turned on by a drive connected by a link to the traverse 12. In this case, the bearings 10 are freely rotated at the ends 9, because at

In this position, the shaft 5 of the swinging insulators 6 is held by its own drive. Thus, the shaft 5 transmits torque by rotating the swinging insulators 6, and the bearings 10 of the ground electrodes 11 freely rotate at the ends 9 of the shaft 5.

The implementation of the invention will simplify the design of the disconnector by installing earthing bearings at the shaft ends of the swing insulators. The bearings themselves are also simplified, eliminating the earthing shaft, which requires the fulfillment of certain requirements for the surfaces of rotation in the bearings. This placement allows

make the disconnector more compact and reliable. The material consumption of the disconnector is reduced by providing a crosshead with an optimal geometric cross section. The use of the invention is most expedient in disconnectors for voltages up to 35 kV and rated currents up to 1000 A.

Claims (2)

1. A swing disconnector containing a frame with insulators and fixed contacts on top of the latter, swing insulators with movable contacts, mounted on a shaft rotating in bearings mounted on the frame, and Earthing rotating in bearings, characterized in that, in order to simplify the design, reduce material consumption and increase reliability, said insulator bearings and earthing bearings are located on a common shaft, the earthing devices being fixedly mounted on the crossarm. 2. The disconnector according to claim 1, with the exception that said bearings of the insulator and earthing switches are located on the shaft of the swinging insulators. FIG. 2