SU813524A1 - Gas-blast switch - Google Patents

Description

(54) AUTOMATIC GAS BREAKER

one

The invention relates to electrical equipment and can be used in the power industry. to disconnect high voltage currents.

Known switch with gas blasting, containing movable and fixed contacts, inductive dynamic drive with inductor, made in the form of a flat multi-turn coil connected to a capacitive energy storage device, with a core of a well-conducting material, rigidly connected with a hollow movable contact, pneumatic system for supply of compressed gas through a hollow movable contact to the arc chute for blowing electric arc 1.

The disadvantage of this switch is the complexity of the design, due to the presence of an induction-dynamic system for opening contacts and a pneumatic system for blowing and extinguishing arcs.

Also known are auto-blower gas switches, a distinctive feature of which is the presence of a built-in additional induction-dynamic device, along with the main external drive, which comes into effect when a disconnected current flows through its inductor and has an additional effect on the moving elements of the switch. One of these switches contains moving and fixed contacts, the main external drive, the mt of which is rigidly connected to the moving contact, an additional induction-dynamic driving device, the inductor of which is rigidly fixed to the moving contact, and measles

made in the form of a piston, which can move along a moving contact as along a guide and is located inside a compression cylinder rigidly connected to a moving contact, the insulating nozzle 2.

The closest to the proposed is an auto-blow gas switch containing fixed and movable contacts, the main external drive, which is rigidly (in the form of supporting rods)

Claims (3)

connected to a movable contact and a compression cylinder, an additional induction-dynamic driving device, the inductor of which is also rigidly connected to the thrust and coaxial with the compression cylinder, the drive inductor with axial flat winding is connected to an independent power source, and the measles are made in the form of a light floating piston inside the compression cylinder, and the insulating nozzle, fixed / .jHHoe on the compression cylinder 3. The disadvantages of these switches are the complexity of the design, due to in the presence of an external main drive and an additional drive device built induktsionnodinamicheskogo and sufficiently high reliability because the inductor is made movable exposed to dynamic loads when triggered, and also due to the presence of sliding contacts, through which the transfer is effected in the inductor current. The purpose of the invention is to simplify the design and increase the reliability of the switch off. The goal is achieved by the fact that the inductor is provided with a second axially located flat winding and is fixed fixed to the support rods of the compression cylinder, the drive is equipped with a second core, which is rigidly connected to the compression cylinder. In order to provide a two-sided longitudinal gas blowing, the movable contact is hollow and is located, inside the compression cylinder, a length of its axis. In addition, at least one of the support rods is hollow and has a coaxial cable inside it through which the windings of the inductor are connected to a power source. In FIG. 1 shows a switch design with a one-way gas longitudinal blast; in fig. 2 - the same, with bilateral gas longitudinal blast. The switch contains a hollow fixed contact 1, a movable contact 2. rigidly connected to a compression cylinder 3, an induction dynamic drive with an inductor made with two flat windings 4 and 5 fixed in an insulating housing 6 and connected to a capacitive energy storage (not shown), and with two corners 7 and 8, one of which 7 is made in the form of a light floating piston and is located inside the compression cylinder, and the additionally introduced bark 8 is rigidly connected to the compression cylinder 3. The inductor is located to axially to the compression cylinder 3 and is fixedly mounted on the supporting rods 9 passing through apertures in the cortex 8. One of the rods vypdlnen hollow and inside it there is a coaxial cable through which an inductor coil connected to the capacitive energy storage device. An insulating nozzle 10 is mounted on the cylinder 3, the switch is equipped with collector contacts P, springs 12 and 13, and operates a latch 14. To provide a longitudinal two-sided blow, the moving contact 2 (FIG. 2) is hollow inside the compression cylinder along its axis. The switch works as follows. In the on position of the switch, the current of the disconnected line flows through the contacts I and 2, cylinder 3 and the current collector contact P. When a shutdown command is received, the capacitive drive is discharged to the windings 4 and 5 of the inductor. The resulting electromagnetic forces repel measles 7 and 8 from the respective windings of the inductor. Anchor 8 drives the compression cylinder 3 and the movable contact 2, while the compression cylinder 3 moves along the support rods 9 along the guides, compressing the return springs 13, and the insulating nozzle 10 slides over contact 1. The anchor 7 acting as the gas moves inside the compression cylinder 3 towards it, compressing the return spring 12. The gas in the compression cylinder quickly contracts on both sides and fills the cavity of the insulation nozzle 10. When the moving contact 2 moves during the movement of the moving contact 2 and between pins 1 and 2 an electric arc is ignited, the gas compressed to high pressure blows it into the CAVITY of contact 1 (Fig. 1) by performing a one-sided longitudinal blowing, or in the cavity of contacts 1 and 2 (Fig. 2), providing a two-sided longitudinal blowing. As the cylinders (piston 3 and piston 7) move, the distance between the contacts increases, and the arc is intensively blown by the gas flow, and when the insulating nozzle 10 is displaced from the fixed contact 1, a pure gas gap is established between the contacts G and 2. Upon completion of the disengagement operation; 1 | measles 7 under the action of the return spring 12 occupies the initial position, and the movable contact 2 is fixed in the disconnected position with the help of clips 14. When the switch is turned on, the controlled latches 14 are activated and under the action of the springs 13 the compression cylinder 3, and with it the contact 2 returns to its original position. Claims. An auto-blower gas switch containing moving and fixed contacts, an insulating nozzle, an induction-dynamic drive located coaxially with a compression cylinder, a drive inductor with an axial flat winding connected to an autonomous a power source, e.g. a capacitive storage device (e, a measles actuator made in the form of a floating piston located inside a compression cylinder mounted for movement on support rods and rigidly connected with a moving contact, characterized in that, in order to simplify the design and increase reliability, the inductor is equipped with a second axially located flat winding and fixed motionless on the support rods of the compression cylinder, the drive is equipped with a second cortex, which is rigidly connected; m cylinder. 2. The switch according to claim 1, characterized in that, in order to provide two-way longitudinal gas blowing, the movable the contact is made to raise located inside the compression cylinder along its axis. 3. A switch according to claim I, characterized in that at least one of the supporting rods is hollow. A coaxial cable is placed inside it, through which the inductor windings are connected to a power source. Information sources, taken into account in the examination 1. Japanese Patent No. 39-8917, cl. 59 And I, pub. 06.29.64. 2. Japanese Patent M 50-19177, cl. 59H ISZ, pub. (Th. 07.75. 3.Takahashiljao a. about. Research on a new type magnetic puffur gas circuit braker. IEEE Trans Power Appar. and Syst, 974, 93, No. J, 421-427. m ////// // 7 // / 7y. 1L Pu9. one W,