SU1288776A2 - High-voltage generator circuit breaker - Google Patents

Abstract

The invention relates to electrical engineering, in particular to generator switches of high voltage for high rated currents, and is an improvement to the author. St. No. 1145370. The purpose of the invention is to increase reliability of operation. The fixed contact 18 of the separator is provided with an external socket 20, which has an electric and rigid mechanical connection with the fixed contact 18. The inner diameter of the socket contact 20 is slightly smaller than the outer diameter of the socket 17 of the movable contact 11. The design of the contact system of the generator switch allows to increase the reliability of the generator switch, providing a stable opening sequence for the main contacts 3, 4 and 5, arcing contacts and separator contacts by improving the fixation of the movable contact of the separator in the final on position. 2 Il. i (L GS 00 00 ot NJ

Description

The invention relates to electrical engineering, namely to generator BbiK Tro4aTevTflM high voltage for high rated currents, and is an improvement of the invention according to the author. St. No. 1145370.

The purpose of the invention is to increase the reliability of the switch.

FIG. 1 shows a switch, a general view; in fig. 2 - node separator contacts in the included plozhenii.

The generator switch (Fig. 1) consists of a non-magnetic metal screen 1, on which reference insulators 2 are mounted, supporting a current-carrying system. The latter consists of the main stationary cylindrical contacts 3 and 4 and the main movable contact 5, made in the form of a cylinder with an internal pipe 6, which enters the L-shaped guide 7 and ensures the passage of compressed air into the arc-suppressing device 8 through one of the pressure connections insulators 2. The pipe 6 is connected through the crosspiece to the rod 9 of the pneumatic actuator 10, which provides longitudinal movement of the main movable contact.

Inside the main movable contact 5, there is a movable contact 11 of the separator, which is pressed against the rear wall of the casing of the main sliding contact 5 by the springs 12. Sliding contacts 13 are installed between the main movable 5 and the movable 11 contacts of the separator, ensuring their electrically movable connection.

The movable contact 11 of the separator has a protrusion 14. A flange 15 is located on the flange 15 of the main movable contact 5. The movable contact 11 of the separator is made in its end part in the form of a socket 17, covering in the closed position the fixed contact 18 of the separator (Fig. 2), which is rigidly connected with a fixed contact 19 arc suppressor device 8.

The fixed contact 18 of the separator is provided with an external socket contact 20, which has an electric connection and a rigid mechanical connection with the fixed contact of the separator.

The inner diameter of the outer contact 20 is selected to be slightly smaller than the outer diameter of the wall socket 17 of the catenary contact.

The switch is turned on as follows.

Compressed air is supplied to the left side of the actuator 10 and the actuator piston moves from the leftmost position to the rightmost position. The piston of the actuator 10 is connected by a rod 9 with the main movable contact 5 and, moving it, first closes the contacts 17 and 18 of the separator,

0

50

about

five

five

0

The main contacts 4 and 5 and in the final position are contacts 17 and 20 of the separator. The latter ensures reliable fixation of the movable contact 11 of the separator in the on position. Since the contacts of the arcing device 8 are already closed at the beginning of the switching on process, the switch is turned on.

Turning off the switch occurs as follows.

Compressed air is supplied to the right side of the actuator 10, and air is exhausted from the left side thereof. The piston of the actuator 10 from the extreme right position moves to the extreme left position, the piston rod 9 t is not behind the main movable contact 5. There is an air gap between the movable movable contact 5 and the main fixed contact 4, and the current flowing through the switch to moving contact 11 of the separator, the rosette 17 of which is in engagement with the fixed contact 18 of the separator and the external rosette contact 20 due to the forces of friction and then through the arcing device 8 - to the main an explicit fixed contact 4. The springs 12 are compressed, and their compression force is selected so as to be less than the frictional force between the socket 17, the movable contact 11 and fixed contact the separator 18 with the separator outer rosette track 20 until full compression. At this moment, through the supporting insulator 2 and the L-shaped pipe 7, compressed air is supplied, which enters the arcing device 8 of the pulse type and ensures its operation, breaking of the current-circuit and extinguishing the arc. Subsequently, the main movable contact 5 is moved to a distance providing a sufficient insulating air gap, and, continuing to move further, the main movable contact 5 by the protrusion 16 abuts against the protrusion 14 of the movable contact 11 of the separator and opens the socket 17c with an external socket 20, and then contact 18 separator. Under the action of springs 12, the movable contact 11 of the separator moves to its disconnected position.

When the main moving contact 5 reaches its final disconnected position, the air supply to the actuator 10 is stopped and, due to the forces of friction, the main moving contact 5 remains in that position.

The design of the generator switch as compared with the known one allows to increase its operation reliability, providing a stable sequence of opening of the main contacts, arcing contacts and separator contacts due to

improved fixation of the moving contact of the separator in the final on position.

Claims (1)

Invention Formula High-voltage generator switch on aut. St. No. 1145370, different In order to increase the reliability of operation, the fixed contact of the separator is provided with an external socket contact having an electrical and rigid mechanical connection with it, and the internal diameter of the external socket contact is selected smaller than the external diameter of the separator movable contact socket. FIG. 2