SU1003181A1 - Disconnector - Google Patents

Description

(5) DISCONNECTOR

The invention relates to an electrical apparatus about a structure, in particular to high voltage connectors. Horizontal-rotary-type disconnectors are known with contact blades having a slitting-type lamellar detachable contact 1-1. However, disconnectors with a similar split-contact design with a significant amount of contacting forces, requiring a powerful drive to control the blades, and arching forces acting on insulating columns. and creating on them a bending moment about. The closest to the proposed technical essence is the single point, containing insulating columns with contours located on them. knives, one of which is a receiving contact, consisting of two parallel buses, and the second input contact 2 J. In this disconnector, when short circuit currents pass, the electrodynamic forces of the throw, acting at the points of contact, are normal to the contact tires of the receiving contact, due to the mutual arrangement of contact surfaces. In this connection, the contact pressure and thus the resistance to short-circuit currents is weakened. In order to increase it, it is necessary to increase the pressure in the contact, which leads to an increase in the wear of the contact surfaces and the occurrence of an arching force acting on the insulating columns and being dangerous for them. The purpose of the invention is to increase the resistance of the disconnector to short-circuit currents and increase its reliability. The goal is achieved by the fact that in a disconnector containing insulating columns with

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contact blades on them, one of which is a receiving contact j consisting of two parallel tires, and the second an incoming contact, the incoming contact is provided with two pairs of contact elements located at an acute angle to the plane of the working stroke of the blades, each of which forms On the position of the wedge contact with the corresponding bus receiving contact.

In addition, the contact surfaces of the contact elements can be cylindrical.

Fig. 1 shows a pa (disconnector with the knives turned on, in Fig. 2, the knife being the incoming contact; Fig. 3 is a section A-A in Fig. 2; Fig. 4-6 are versions of the disconnector contact node, right on, with different designs of the incoming contact, and in Fig. 7, a contact node of the disconnector, top view.

The disconnector contains a base 1 on which insulating columns 2 are installed with contact blades 3 fixedly mounted on them. The receiving contact of one of the blades is two parallel aii t and 5 preloaded by a spring 6o. The incoming contact of the second knife is provided with two pairs of contact elements 7 and 8, which in the on position form a wedge contact with the contact tires t and 5. The contact surfaces of the contact elements 7 and 8 are cylindrical for ease of contact. Each pair of contact elements that form a wedge contact with the contact tires of the receiving contact can consist of both separate contact elements (FIG. 6) and contact shelves of the same contact bracket (FIG. 3) or two different brackets (FIG. 5).

The device works as follows.

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As the knives come to the on position, the incoming contact comes between the contact tires of the receiving contact and at the end of the switching-on operation, the contact elements 7 and 8 of the incoming contact expand the contact tires 4 and 5 of the receiving contact. The pressure is regulated by the nuts. 9 The implementation of the invention will allow

increase the resistance of the disconnector at short circuit currents and eliminate significant spreading forces acting in the direction of the insulating columns, as well as reduce

the power of the drive necessary to operate the contact blades and increase the overhead of the device.

Claims (2)

1. A disconnector containing insulating columns with contact blades located on them, one of which is the receiving contact, consisting of two parallel buses, and the second one is an incoming contact, reproducing so that in order to increase its resistance to short circuit currents and increase reliability, the incoming contact is equipped with two pairs of contact elements located at an acute angle to the working plane the course of the knives, each of which forms in the switched-on position a wedge contact with the corresponding bus of the receiving contact 2. A disconnector according to claim 1, characterized in that the contact surfaces of the contact members  cylindrical Sources of information taken into account in the examination 1. Afanasyev V.V., Yakushin E.N. Disconnectors. L., Energie. T978, p. 131 .. Instructions for mounting a three-pole disconnector for external equipment. installations of type J5 / 1250B, AKB, 1975 (prototype) / Fg / f. f