RU2282266C1 - High voltage switch with electromagnetic drive - Google Patents

Abstract

FIELD: possible use in high voltage switches with electromagnetic drive on magnetic latch.

SUBSTANCE: high voltage switch contains three poles with vacuum arc-extinguishing chambers, mounted on base and, electromagnetic driving device with two electromagnetic drives, positioned in one row with poles. Stators of electromagnetic drives are mounted on base on its reverse side between middle and edge isolation rods. Anchors of electromagnetic drives are kinematically connected to moveable contacts of vacuum arc-extinguishing chambers through rods of electromagnetic drives, common rod, isolation rods and pressing springs. Common rod is positioned in plane, perpendicular to axes of isolation rods. Axes of isolation rods of electromagnetic cables are primarily positioned in one plane with common rod. Disabling springs are pinned on rods of edge isolation rods, and are abutted by ends against base and common rod.

EFFECT: simplified construction, decreased weight, increased comfort in operation.

4 cl, 1 dwg

Description

The invention relates to the field of electrical engineering and can be used in high voltage circuit breakers with an electromagnetic drive with a magnetic latch.

Known high-voltage vacuum circuit breaker with vacuum interrupter chambers, containing an electromagnetic drive with a magnetic latch, insulating rods, vacuum chambers with fixed and movable contacts (RF Patent No. 2214640, IPC N 01 N 33/666, priority 11.07.2000, published on 10/20/2003, Bulletin No. 29).

The kinematic diagram of this switch contains loaded friction units, which reduces the reliability and life of the apparatus.

Known high-voltage three-pole vacuum circuit breaker containing three vacuum arcing chambers with movable and fixed contacts, isolation rods, electromagnetic drive to each pole (RF Patent No. 2020631, IPC N 01 N 33/66, published September 30, 94, bull. No. 18).

Such a switch is characterized by a relatively complex design due to the presence of a separate drive for each pole. Three disconnecting springs (one for each pole) are not interconnected, which increases the likelihood of non-simultaneous closure of the contacts of the vacuum interrupter chambers.

Known high-voltage three-pole vacuum circuit breaker containing three poles with vacuum arcing chambers mounted vertically on the base, an electromagnetic drive device mounted on the same base on the back side. The movable part of the drive unit is connected to the insulation rods of the vacuum interrupter chambers by a rod located in a plane perpendicular to the axes of the isolation rods and the electromagnetic drive device (RF Patent No. 2156006, IPC N 01 N 33/66, published September 10, 2000).

The disadvantage of this design is that the axes of the vacuum interrupter chambers are located not in a row, but in a triangle, which causes problems connecting the apparatus in complete switchgears.

The claimed technical solution is aimed at creating a high-voltage circuit breaker, characterized by a relatively simple design, low weight, ease of operation.

The problem is solved due to the following: the high-voltage switch contains three poles with vacuum arcing chambers installed on the base, an electromagnetic drive device mounted on the same base on the back side. The movable part of the electromagnetic drive device is connected to the insulation rods of the vacuum interrupter chambers by a rod located in a plane perpendicular to the axes of the insulation rods. The electromagnetic drive device consists of two electromagnetic drives mounted in a row with the poles between the middle and extreme insulation rods.

The option can be considered optimal when the axes of the insulating rods and electromagnetic drives are located in the same plane with the common traction.

Shut-off springs are preferably dressed on the rods of extreme insulation rods, and their ends abut against the base and the general rod.

The drawing shows a high-voltage circuit breaker in section.

The high-voltage switch contains three poles 1, 2 and 3 with vacuum arcing chambers 4, 5 and 6, mounted on the base 7 vertically relative to this base. The electromagnetic drive device contains two electromagnetic drives 8 and 9, located in a row with the poles 1, 2, 3. The stators 10 and 11 of the electromagnetic drives 8 and 9 are installed on the base 4 on its reverse side between the middle 12 and extreme 13 and 14 isolation rods . The anchors 15 and 16 of the electromagnetic actuators 8 and 9 are kinematically connected with the movable contacts of the vacuum arcing chambers 4, 5 and 6 through the rods 17 and 18 of the electromagnetic actuators 8 and 9, the common rod 19, the isolation rods 12, 13, 14 and the compression spring 20, 21 , 22. The common rod 19 is located in a plane perpendicular to the axes of the insulating rods 12, 13, 14. The axes of the insulating rods 12, 13 and 14 of the electromagnetic actuators 8 and 9 are mainly located in the same plane with the common rod 19. Shut-off springs 23 and 24 are dressed rods of insulating rods 13 and 14, and the ends abut against the base 4 and o total thrust 19.

The device operates as follows. Under the action of the trip springs 23, 24, the switch is in the off state - the contacts in the VDK 4, 5, 6 are separated, between the anchors 15, 16 and the stators 10, 11 of the electromagnetic drives 8 and 9, gaps are formed. When voltage is applied to the coils of electromagnetic drives 8, 9, the anchors 15, 16 are pulled to the stators 10, 11 and through the kinematic chain: rods 17 and 18, the common rod 19, the insulating rods 12, 13, 14 act on the movable contacts in the vacuum arc chamber. After closing the contacts, the compression springs 20, 21, 22 begin to compress. Touching the anchors 15, 16 of the stator 10, 11 indicates that the switch is turned on and there was a fixation of them in this position by a magnetic latch.

To turn off the switch on the coils of the electromagnetic actuators 8, 9 apply voltage reverse polarity. In this case, the holding force of the electromagnetic drives 8, 9 is reduced. After the holding force becomes less than the forces from the side of the preload spring 20, 21, 22 and the trip spring 23, 24, the armature 15 and 16 begin to move, and the contacts in the vacuum interrupter chambers open.

The use of this invention allowed to simplify the design of the high-voltage switch, increase the reliability of its operation, reduce weight, make it more convenient to use.

Claims (4)

1. A high-voltage circuit breaker with an electromagnetic drive, comprising three poles with vacuum interrupter chambers installed on the base, an electromagnetic drive device mounted on the same base on the reverse side, the movable part thereof being connected to the insulation rods of the vacuum interrupter chambers by a common traction located in the plane perpendicular to the axes of the insulating rods and the electromagnetic drive device, characterized in that the electromagnetic drive device contains two electric magnetic actuators mounted in a row with poles between the middle and extreme isolation rods. 2. The high voltage switch with an electromagnetic drive according to claim 1, characterized in that the axis of the insulating rods and electromagnetic drives are located in the same plane. 3. The high-voltage switch with an electromagnetic drive according to claim 2, characterized in that the common rod is located in a plane passing through the axis of the insulating rods and electromagnetic drives. 4. The high-voltage switch with an electromagnetic drive according to claim 1, characterized in that the disconnect springs are dressed on the rods of the extreme insulation rods, and their ends abut against the base and the general rod.