KR900009089Y1 - Scattening holding device of high voltage switch - Google Patents

Abstract

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Description

Dispersion maintenance device for closing state of solenoid type high pressure switch

1 is a front sectional view for showing the configuration of a conventional solenoid input high pressure switch.

2 is a side cross-sectional view of FIG.

3 is a plan view taken along the line A-A of FIG.

Figure 4 is a side cross-sectional view showing the automatic state of the high-pressure switch, Figure 4a is a side cross-sectional view of the automatic shut-off state.

Figure 4b is a side view of the manual injection state.

Figure 4c is a side cross-sectional view of the automatic injection state.

Figure 5 is a side view of the open state maintaining device configured according to the present invention.

6 is a side view of the input state maintaining apparatus configured according to the present invention.

7 is a solenoid electrical control circuit diagram constructed in accordance with the present invention.

* Explanation of symbols for main parts of the drawings

5: solenoid 5a: plunger

6: link 12: turntable

20: 1st toggle lever 21: tension spring

22, 28, 29: fixed rotating shaft 23, 30: torsion spring

24: lever 25: secondary toggle lever

25a, 27, 31: latch surface 25b: trip lever

26: trip coil

The present invention relates to an input state dispersion maintaining device of a solenoid input high pressure switch.

In particular, in the high-pressure switchgear which obtains input and open energy by the solenoid, the opening spring is squeezed at the same time as the input force of the solenoid, while maintaining the input state as a mechanical latch mechanism. An apparatus and method are provided.

Conventional solenoid-type high-pressure switch is a holding coil type that continuously supplies current to the solenoid to maintain the input state continuously after the input is completed. It has a spring toggle mechanism that interlocks with the manual operation handle on one side. In addition, the main shaft is mechanically separated from the mechanism, and the movable main shaft for driving the main contact point is connected to the injection solenoid by the link mechanism.

It can be used as a sequential control method in the △ system according to the auxiliary cooperative method of the holding coil method, but in the Y system, the switch is opened unconditionally when the power of the coil is lost, so it is installed in series with a recloser, sectionalizer, etc. It is impossible to use because it destroys the protection coordination when it is used. Since the holding coil is always excited, the stability and reliability deteriorate due to the power failure of the entire system due to the deterioration of the solenoid and the failure of the control circuit.

In addition, since the solenoid is always excited, there is no way to remove the residual energy in the solenoid, so there is a limitation in application because the time required for opening after input is long.

Here, look at the configuration and operation principle of the existing holding coil type switch as follows.

That is, as shown in Figs. 1 and 2, reference numeral 2 denotes a manual operation handle provided on the outer side of the case 1, and a lever 9 is fixed to the connection shaft end of the handle.

In addition, as shown in FIG. 4, the connecting shaft casing is provided with cams 11 having arcuate first and second actuating portions 11a and 11b so as to be idling, and one end of the cam and one side of the lever 9 are provided. An axis-shape toggle spring 10 is provided in between.

In addition, on the upper side inside the casing 1, the movable contact 3 with the movable contact 8a provided with the movable contact 8a as the insulating arm 7 at the opposite position is fixed fixed to the side wall along the longitudinal direction. While being installed, the movable spindle 3 was provided in contact with the operating portions 11a and 11b of the cam 11 as rollers 3b and 3c above and below the spindle lever 3a.

And, on one side of the movable spindle 3, the link mechanism 4 composed of first, second and three pivot levers 4a, 4c and 4e, first and second pull levers 4a and 4d, and a rotation lever 4f. And hinged coupling of the plunger (5a) of the solenoid (5) for automatic injection. (See Figure 3).

Looking at the operating state of the switch configured as described above is as follows.

First, when the handle 2 is turned clockwise in the state of FIG. 4A of the manual closing state drawing, the lever 9 directly connected to the handle turns from the point C to the right, and the dead point B ' To reach.

The lever 9 moves to the point A, and the cam 11 rotates quickly from the point E to the point D for the force of the accumulated toggle spring when the dead point B 'is exceeded by the continuous turning motion. By turning the main shaft in the same direction by hitting the upper and lower rollers 3b and 3c of the main spindle lever 3a integrally assembled with the movable spindle 3 using the parts 11a and 11b, and simultaneously The main circuit is introduced while the movable contact 8a is coupled to the fixed contact 8b.

(See FIG. 4B)

Secondly, in the closing state of FIG. 4B, the lever 9 reaches the dead point B at the point A while turning the handle 2 counterclockwise, and when the dead point is exceeded, the toggle spring ( By encapsulating in 10), the lever 9 moves quickly from the point C and the kim 11 moves from the point D to the point E, where the first and second operating parts 11a and 11b and the rollers 3b and 3c move. ), The main shaft lever 3a and the movable spindle 3 turn counterclockwise, and the movable contact 8a is separated to cut off the main circuit (see Fig. 4a).

Third, when the solenoid 5 in the auxiliary case 1a is operated and the plunger 5a is inserted in the state shown in FIG. 4a in the automatic closing state, the roller is rotated clockwise of the movable spindle 3 by the link mechanism 4. The cam 11 is moved from E to F position as the 3c and 3c, and the toggle spring 10 is condensed, and the movable contact 8a is engaged with the fixed contact 8b so that the main circuit is introduced. See also 4c)

The structure of the existing holding coil type switchgear and its operation principle have been described. Depending on the subdivided type, the spring toggle mechanism may be different, but the movable spindle and the spring toggle mechanism are basically separated, and the closing solenoid is a link mechanism. The structure that drives the movable spindle directly by means of the same operation principle.

However, the holding coil type switch as described above cannot be used in the Y-ground system which does not allow the power loss switch to be opened unconditionally, and even when applied to the forward type control method in the △ system, When an abnormality occurs in the control circuit, it immediately leads to a power failure state of the electric system, thereby reducing the stability and reliability of the product.

In addition, due to the residual energy of the solenoid, since the shortest operating time from closing to opening is about 0.7 seconds, there is a problem such that it cannot be used in a protective system requiring a higher speed operation.

Therefore, the object of the present invention is to solve the conventional problems as described above, at the same time, minimizing the time required for opening after closing and solving the residual energy problem of the solenoid high-speed switchgear that can be re-inserted in the minimum opening time and the shortest time In providing.

In addition, another object of the present invention is that the existing holding coil type switch was used only as a load switch of the △ system, so that all the △, Y system is applicable, and also as a breaker-class switch that requires high-speed operation. It is to be used.

In order to achieve the above object, the insertion force of the solenoid is provided between a link mechanism connecting the movable spindle and the solenoid, by installing a mechanical latch mechanism configured to directly interlock a plunger of the solenoid or to separate the plunger first. The plunger is automatically interrupted at the same time as the closing and maintaining the closing state, and the opening time by the residual energy of the closing solenoid when the latch mechanism is set by controlling the opening and closing of the DC side of the rectifier circuit to which the solenoid closing coil is connected. To prevent delays.

The latch method of the present invention is largely divided into a method of interlocking the plunger of the solenoid and a method of first separating the plunger of the solenoid.

The method of interlocking the plunger of the solenoid at the time of opening is relatively simple, and the open-side dynamic time can be performed in about 5 cycles after the input by the DC side control means of the present invention. It is difficult to apply to the required breaker.

In addition, the first method of separating the plunger of the solenoid at the time of opening may be applied to a switch that requires a high speed of about 3 cycles.

When described in more detail based on the preferred embodiment of the present invention as follows.

There is a manual operation handle part on one side of the case, a toggle spring shaft mechanism part connected to the case inside, and a movable spindle for separating / contacting a mechanically separated contact part, and an injection solenoid in the auxiliary case has the movable spindle and the rotating plate. In order to maintain the closing state of the plunger connected to the link mechanism, in order to achieve a mechanical latch of the plunger, a latch mechanism is provided at a portion of the link mechanism of the movable spindle in which the plunger of the plunger drives the contact. 20), the primary toggle lever as a lever 24, which controls the rotary plate 12, controlled by the secondary toggle lever 25 that is directly hitting the trip coil and the rotary plate and the auxiliary tension spring (21) Of the solenoid-type high-pressure switch by dispersing the force of the toggle spring 10 using a latch mechanism to control the As the emphasis to maintain the input state, the drawing fifth assist according to claim 6, also it is attached to look at the configuration as follows.

Manual operation handle part on one side of the case, toggle spring shaft mechanism part inside the case connected to it, and a movable spindle for separating / contacting the mechanically separated contact part, and a link mechanism having the movable solenoid in the auxiliary case having the movable spindle and the rotating plate. In constituting a device for maintaining the state fed in conjunction with the usual connected as, the plunger 5a of the solenoid 5 is connected to the rotating plate 12 by a link 6, one end of the rotating plate 12 The bearing 19 for reducing the frictional force is installed to form a primary latch portion together with the primary toggle lever 20.

The toggle lever 20 is mounted on the fixed rotation shaft 22 as a torsion spring 23 for return to the home position, and has a latch portion 27 to be engaged with the bearing 19 at the end thereof.

Then, a separate small bearing 21 is installed at one end of the rotating plate 12, a separate small bearing 21 is installed at one end of the rotating plate 12, and the lever 24 is connected to the opposite end thereof, and an upper side thereof is provided. Together with the secondary toggle lever 25 to configure the secondary latch portion.

One end of the lever 24 is supported by the fixed rotation shaft 28, the other end constitutes the latch surface 31, and the secondary toggle lever 25 is a torsion spring 30 for returning the fixed rotation shaft 29. ), One end constitutes a latch surface 25a, and the other end functions as a trip lever 25b.

Accordingly, the secondary latch portion is latched to the return state with the switch open, and the primary latch portion is released.

As shown in FIG. 6, when the solenoid 5 is excited, the plunger 5a is pulled and rotated by the link 6, and the movable spindle 3 is rotated so that the switch is closed and the toggle spring 10 is reduced. .

As the rotating plate 12 rotates, the tension spring 21 is contracted, the primary toggle lever 20 is rotated and latched at the maximum displacement by the torsion spring 23, and the switch maintains the closing state.

When tripping, when the trip coil 26 is excited and strikes one end 25b of the secondary toggle lever 25, the secondary latch surface 31 collapses, and the lever 24 is closed by the tension spring 21. Since it moves and hits the primary toggle lever 20, the primary latch surface 27 is peeled off to open the switch.

(See dashed line in FIG. 6)

The tension force of the spring 21 is necessary to remove the primary latch, and the force applied to the trip coil is limited to the latch force by the energy of the spring 21, thereby achieving a sensitive tripping mechanism.

However, in the above method, the plunger of the solenoid 5 and the rotating plate 12 are directly connected by the link 6, and the minimum time from opening after opening is about 0.5-0.7 seconds because of the residual energy of the injection solenoid. There is a problem.

The holding coil method needs to continue to supply power to the solenoid even after the charged material, so there is no way to shorten the minimum opening time, and thus it cannot be used in applications requiring more rapid operation.

Therefore, Figure 7 is an example of an electrical control circuit for reducing the minimum operating time to about 5 cycles in the mechanical latch method of the present invention.

In the circuit of FIG. 7, without Cy ₂ and Cy _2a , a pumping prevention circuit for controlling a normal input solenoid is provided.

The present invention proposes a method of opening and closing the DC side of the rectifier circuit to which the solenoid is connected in order to quickly remove the residual energy of the solenoid.

In the circuit, the auxiliary relay Cy ₂ was connected in series with the "a" contact of the input relay ccx so that the DCy ₂ contact opened and closed the input coil.

The cy ₂ auxiliary relay is only ignited after the AC power is opened by ccx, so the blocking of DC current is limited to the residual energy of the input solenoid, increasing the life of the DC auxiliary relay.

In addition, since both sides of AC and DC of the rectifier circuit are normally completely open, the rectifier circuit is protected from surges in the power circuit.

It is also possible to simultaneously control both AC and DC by using the input relay ccx as a multiple contact without using the auxiliary relay Cy ₂ .

When the latch mechanism is set in the structure in which the input solder is connected to the main shaft, the DC side of the rectifier circuit to which the input coil is connected is opened and closed in order to prevent the opening time caused by the current energy of the input solenoid. Is in the way.

Therefore, the contact point of the input relay ccx opens or closes only the DC side of the rectifier circuit. Regardless of the use of the auxiliary relay Cy ₂ , an attempt to solve the open time delay problem in the above-described mechanism for opening and closing the DC axis is within the scope of the present invention.

In this method, the problem of the residual energy of the input solenoid does not affect the opening time but the re-entry time.

The control circuit of FIG. 7 allows for constant and quick re-entry in this case.

The present invention as described above, by setting the primary toggle mechanism on the plunger shaft link of the solenoid to connect to the rotating plate interlocked with the main shaft, while preventing the opening time is delayed by the residual energy of the solenoid and the inertia force of the plunger, The secondary toggle mechanism effectively distributes the force on the spring of the actuator.

By combining the DC control circuit as shown in FIG.

In addition, the mechanical latch mechanism is installed between the link mechanism of the main shaft driving the contact portion and the plunger of the solenoid, thereby limiting the limitations of cooperation, reliability and stability of the holding coil system, and application limitations due to impossibility of high speed operation. There is another effect that can be solved.

Claims (1)

A manual operation handle part on one side of the case, and a toggle spring inside the case connected to the shaft mechanism, and a movable spindle for separating and contacting the mechanically separated contact part, and an injection solenoid in the auxiliary case has the movable spindle and the rotating plate. In constructing a device for maintaining state dispersion which is interlocked with a common one connected as a link mechanism, a link plate 6 is provided with a rotary plate 12 having a bearing 19 at the lower end thereof while being installed at the end of the link mechanism 4. Simultaneously with hinge coupling with the plunger 5a of the solenoid 5, a primary toggle lever 20 having a latch surface 27 having one end coupled to the bearing 19 at one side thereof is a torsion spring 23. ) Was hinged by a fixed rotary shaft 22 interposed therebetween, one end of which is hinged to the fixed rotary shaft 28 on one side of the toggle lever 20, and has a latch surface 31 at the distal end thereof. At the same time, the central part is provided with a lever 24 interlocked with the rotating plate 12 and the tension spring 21, and at one end, the latch surface 25a to be coupled with the latch surface 31 of the lever and The second toggle lever 25 includes a trip lever 25b that strikes and is interlocked with the trip coil 26 on the other end, and the center portion is coupled to the fixed rotation shaft 29 having the torsion spring 30. Dispersion maintenance device of the solenoid input high-pressure switch is characterized in that the hinge 24 is installed in a hinged manner in the upper predetermined position of the lever (24).