RU171273U1 - High voltage circuit breaker drive - Google Patents

Abstract

A high-voltage circuit breaker drive is proposed, which includes a casing in the form of vertical and horizontal racks, holding an electromagnet and a tripping electromagnet mounted on vertical racks of the casing; the first axis installed in the bearings of the uprights on which the first and second levers are mounted, interconnected by a latch through a second axis installed in the bearings of the first lever; a drive attached to two vertical racks, the rod of which is connected to the second lever, while the first and second levers coupled by a latch have the ability to transmit movement to the insulating rod, including the main contacts of the switch, a third lever rotating on a third axis mounted in the bearings of the vertical racks while the third lever can act on the latch by means of a holding electromagnet or a shutdown electromagnet, thereby disengaging the first and second levers, and thereby turn off the main contacts in switch. The technical result is to increase the reliability of the design of the release and increase the efficiency of switching. 3 s.p. f-ly, 2 ill.

Description

The drive with a free trip mechanism is designed for a high-voltage circuit breaker designed for operational switching and protection against overloads and short circuits in electric locomotive circuits.

A known high-voltage circuit breaker drive (see RU96105367A from 06/20/1998) containing a shaft with a rigidly connected lever, a latch mounted on the lever with the possibility of rotation and interacting with the control mechanism and the body of rotation. At the same time, a lever is additionally freely mounted on the drive shaft, and on the rigidly mounted lever there is a part with the possibility of interaction with both levers, while the latch is made with a coaxially arranged cylindrical section and a protrusion in contact with the rotation body, installed freely and interacting with the newly introduced part.

The disadvantage of this device is the lack of reliability and efficiency of switching.

The technical result of the proposed technical solution is to increase the reliability of the design of the release and increase the efficiency of switching.

The proposed utility model is illustrated by the following figures.

Figure 1 - General view of the drive of the high voltage switch;

Figure 2 - shows the position of the levers of the drive of the high voltage switch in the on and off positions.

The main drive components shown in FIG. 12:

1, 2, 6, 15 - levers;

3, 5, 16 - axis;

4 - latch;

7 - drive (pneumatic or electromagnet, depending on version);

8 - holding electromagnet:

8.1 - anchor of the holding electromagnet;

8.2 - stock;

8.3 - throwing spring;

8.4 - coil

9, 11 - rack racks;

10 - shutdown electromagnet;

10.1 - rod electromagnet shutdown;

10.2 - return spring;

12 - the main contacts of the switch;

13 - spring;

14 - stock.

The drive shown in figure 1-2, includes

a case assembled from two vertical posts pos. 9, 11, to which electromagnets are attached pos. 8 and 10;

axis pos. 3, mounted in the bearings of the uprights pos.11, on which the levers pos. 1 and 2, interconnected by a latch pos. 4 through the axis pos. 5,

drive pos. 7 (in this case, a pneumatic cylinder, but there are options with an electromagnet and a mechanical drive), attached to two vertical posts pos. 11, the rod of which is connected with the lever pos. 2.

lever pos. 6 rotates on the axis pos. 16, is retracted to the extreme position by the return spring pos. 10.2, while returning the anchor of the holding electromagnet pos. 8 to the closed position and the shutoff solenoid pos. 10 to the off position;

holding electromagnet pos. 8 consists of an external movable disk-shaped armature pos. 8.1, with the sphere, the anchor when dropping acts on the lever pos. 6, the electromagnet includes the stem pos. 8.2, drop spring pos. 8.3 and the electromagnet coil pos. 8.4.

The operation of the drive is shown in FIG. 2.

Electromagnets pos. 8 and 10 act on the latch pos.4 through the lever pos.6. With the drive off, pos. 7 between the latch pos. 4 and the lever pos. 6 there is a gap "A" (of the order of 10-14 mm), when the drive is on, this gap is selected to the minimum value determined when setting up the drive.

When applying an enable signal to the coil of the holding electromagnet pos. 8 the drive is ready to turn on, the armature of the electromagnet is pulled. Lever pos. 2 is connected with the main drive in this case with the pneumatic cylinder pos. 7 through the stock pos. 14. The lever pos. 1 is connected with the drive of the main contacts of the switch pos. 12 through an insulating rod. Both levers pos. 1 and 2 rotate on the same axis pos. 3. When you turn on the main drive pos. 7 stock pos. 14 transfers the movement to the lever pos. 2, which rotates counterclockwise around the axis of the pos. 3. Latch of the free release pos. 4 located on the lever pos. 2. is meshed with the axis pos. 5 levers pos. 1 under the action of the spring pos. 13, so the lever pos. 1 moves behind the lever pos. 2, transmitting the movement to the insulating rod pos. 12, including the main contacts of the switch. Moving, lever pos. 2 cocking the breaking spring pos. 8.3 holding solenoid pos. 8 through the lever pos. 15. The drive is ready for shutdown at any moment of movement of levers. Act on the mechanism of the free release, implemented on the latch pos. 4, through the lever pos. 6 can be done by turning off the power of the holding magnet coil pos. 8, then the anchor pos. 8.1 will no longer be held by the magnetic field of the coil pos. 8.4, and the breaking spring pos. 8.3 will move the anchor by turning the lever pos. 6, there will be a gap "B" between the armature and the body of the electromagnet, or by applying a signal to the shutdown electromagnet pos. 10, which when triggered by the rod pos. 10.1 will transmit movement to the lever pos.6, and it will release the latch pos. 4 out of engagement with the axis pos. 5. The latch will disengage the levers pos. 2 and 1, the switch contacts will move with the lever pos. 1 when the main drive is switched on (return springs of the main contacts are not shown), the levers will engage again when the main drive returns, pos. 7 to the starting position. Lever pos. 1 under the action of the return (disconnecting) spring of the main contacts when disconnected, moves together with the insulating rod of the main contacts, rotating around the axis of the pos. 3 - he first takes the initial position, and then when the main drive is turned off, the lever pos. 2, the latch rotating on its axis on the lever pos. 2, engages with the lever axis pos. 1 (the sharp bevel on the latch is designed so that, resting on the axis of pos. 5, the latch begins to deviate, compressing the spring of pos. 13 and then, having passed the axis of pos. 5, returns under the action of the spring of pos. 13 and engages with this axis).

The tripping electromagnet is made forced with a charged magnetic circuit, this allowed the control circuit breaker to quickly act on the mechanism of the free trip.

This drive has allowed its design to provide the following:

without an enable signal on the holding solenoid, the drive will not be able to turn on the main contacts of the switch;

when the circuit of the coil of the holding electromagnet opens, the main contacts of the circuit breaker will trip (in the circuit of the holding electromagnet there are electric locomotive protection devices)

The device of a free trip allows shutdown by a high-speed trip electromagnet.

This design of the drive of the main contacts of the circuit breaker with a free trip mechanism, which can be affected by both a holding electromagnet and a quick-acting disconnecting electromagnet, ensures reliable operation of the circuit breaker and its quick switching of electric locomotive circuits.

This drive can be used for both AC and DC circuit breakers.

The main features of the drive of a high-voltage circuit breaker were disclosed above, but it is obvious to any person skilled in the art that based on the disclosed data, it is possible to create variations of the drives, for example, with a different arrangement of electromagnets, the main drive, etc.

Claims (9)

1. The drive of the high voltage switch includes: the case assembled from two vertical racks and a horizontal rack, holding electromagnet and shutoff electromagnet mounted on the uprights of the housing; the first axis installed in the bearings of the uprights on which the first and second levers are mounted, interconnected by a latch through a second axis installed in the bearings of the first lever; a drive attached to two vertical struts, the rod of which is connected to the second lever, while the first and second levers coupled by a latch have the ability to transmit movement to the insulating rod, including the main contacts of the switch, in addition, the second lever can cock the holding spring of the holding electromagnet through an additional fourth lever; a third lever rotating on a third axis installed in the bearings of the uprights, while the third lever can act on the latch by means of a holding electromagnet or a shutoff electromagnet, thereby disengaging the first and second levers, and thereby turn off the main contacts of the switch. 2. The drive of the high voltage switch according to claim 1, characterized in that the drive is made pneumatic. 3. The drive of the high voltage switch according to claim 1, characterized in that the drive is made in the form of an electromagnet. 4. The drive of the high voltage switch according to claim 1, characterized in that the shutdown electromagnet is made forced with a lined magnetic circuit.

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