SU397981A1 - DISCONNECTOR - Google Patents

Description

one

The invention relates to the field of high-voltage apparatus, in particular to the connection.

There are known disconnectors that contain a mobile contact, a conductor, and a mobile contact on the bushings of insulators —and fixed contacts that form a horizontal time. Closed gap.

However, such disconnectors are complex in design and unreliable in operation.

In the proposed disconnector, in order to eliminate the above disadvantages, the fixed contacts are arranged symmetrically with respect to the movable contact, made in the form of two-contact blades, one ends of which are connected hingedly to the conductor of insulators so that during the movement of the conductor of insulator connected to the drive, up the contact blades are folded to form an open gap, and when moving downward they open, closing the specified gap. In addition, the connection of the contact blades with a bush of insulators connected to the drive is made in the form of a hinged suspension with a hole for the passage of the said bush of insulators so that when the disconnector is switched on, each of the blades forms a lever of the first kind. In addition, the fixed contacts are made with a wedge-shaped groove. The support wires of the insulators are U-shaped and located across the pole of the disconnector.

FIG. 1 schematically shows the proposed disconnector (a - in the “on” position, b - in the “off” position); in fig. 2 shows one of the fixed contacts and a contact knife of the disconnector with a hinged suspension (a - at the moment of contact with the contact knife of the fixed contact, b - in the extreme position “on”).

Fixed contacts / disconnectors are connected to the portal with the help of bushings of insulators 2 at the required distance from each other, forming a horizontal open gap.

Contact blades 3 connected by a hinge system 4 are suspended to the control shaft 5 through a cable connected to the disconnector drive.

Near the opposite ends of the knives are attached to the supporting arms ndam 6, mounted on the portal.

When the control arm moves upwards, the semi-knives fold to form an open gap consisting of two gaps (Fig. 16), and when it moves downwards by a predetermined stroke, they open under the action of its own weight, the divorce supporting force 6 to the sides and

including loose contact ends in fixed contacts (Fig. 1 a).

Fixed contact} with the contact of the disconnector has a contact surface that is open at the bottom. In the process of switching on, the knife 3 is turned around the suspension point 7 when the control arm is lowered 5 until the contact point is touched by its contact surface of the fixed contact (Fig. 2a). The hinge suspension 4 is provided with a hole for the passage of the control arm. The control arm is unloaded from the weight of the contact system, and the knife hangs motionless, fixed at two points (suspension point 7 and the point of contact of the fixed contact), forming a lever of the first kind, and provides contact pressure due to its own weight forces (Fig. 2 b ). Fixed contact, made with a wedge-shaped groove, which includes a contact knife, shown on the fit. 2, type A.

The contact system in the "off" position can swing in certain limits under the action of the wind, with the most unfavorable swinging in the direction across the pole. To reduce this buildup, the suspension arms 6 (Fig. 1), supporting the contact ends of the semi-knife, are made Y-shaped and are located across the pole.

It is possible to use the proposed disconnector in conjunction with an overhead switch, which allows you to create an overhead unit of the switchgear (disconnector-switch-disconnector) if one of the fixed contacts of the disconnectors is combined with the breaker output contact.

Such a unit, in combination with current and voltage measuring devices made on the basis of optoelectronic systems, makes it possible to significantly increase the compactness of ultrahigh voltage switchboards and increase the factory readiness of the objects to be mounted.

The suspension unit of each of the three phases can be installed on a traverse fixed on the portal of an open switchgear, which allows to significantly reduce the cost of the foundations for devices and reduce the volume and time of installation and commissioning works.

P ip e d (meta of the invention

Claims (4)

1. A disconnector containing a drive, a movable contact and fixed stationary spacing on the arms of insulator insulators contacts, characterized in that, in order to simplify the design and increase reliability, the fixed contacts are arranged symmetrically with respect to the movable contact, made in the form of two contact knives, one ends of which are hingedly connected to the drive shaft of insulators, connected to the drive, while the other ends are separately connected to the supporting bushings of insulators so that, when the arm moves, the insulators, associated with the drive, the upward contact blades are folded together to form an open gap, and as they move downward they open, closing the indicated gap. 2. A disconnector according to claim 1, characterized in that, in order to increase the reliability of the contact, the connection of the contact blades with a conductor of insulators associated with the drive is made in the form of a hinged suspension with an opening for passing the conductor of insulators so that turning on the disconnector, each knife forms a lever of the first kind. 3. Disconnector io lp. 1, 2, characterized in that, in order to increase the reliability of contact, fixed contacts made with a wedge-shaped groove. 4. Disconnector by PP. 1-3, characterized in that, in order to increase reliability, the supporting wires of insulators are made Y-shaped and are located across the pole of the disconnector. but hHK Q a J Sijf // W dx Perdogorod's lever fpue.2