KR101204689B1 - Mechanical interlock mechanism of auxiliary switch for vacuum contactor - Google Patents

Abstract

PURPOSE: A mechanical interlocking device of an auxiliary switch for a vacuum contactor is provided to supply a simultaneous input prevention device of two stable vacuum contactors by a mechanical configuration including a first lever, a lock lever, a second lever and a connection shaft. CONSTITUTION: A first lever(Vz1-2) is rotationally installed on a first vacuum contactor(Vc1). The first lever is rotated to a first position operating a first auxiliary switch and a second position separated from the first auxiliary switch. A second lever is rotationally installed to a second vacuum contactor(Vc2). The second lever is rotated to a first position operating a second auxiliary switch and a second position separated from the second auxiliary switch. A connection shaft(11) is connected to a lock lever(10) and the second lever.

Description

Mechanical interlock mechanism of auxiliary switch for vacuum contactor {MECHANICAL INTERLOCK MECHANISM OF AUXILIARY SWITCH FOR VACUUM CONTACTOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum contactor, and more particularly, to a mechanical interlock mechanism that prevents two simultaneous inputs to prevent a short circuit accident in two vacuum contactor auxiliary switches operated in parallel.

The present invention is a primary transformer or a high voltage electric motor using a high voltage of thousands of volts or a power device used for opening and closing the main power source, two vacuum contactors operated in parallel for stable operation, for controlling the opening and closing of the vacuum contactor The present invention relates to a device for preventing simultaneous injection of an auxiliary switch.

Meanwhile, an example of the related art for preventing the simultaneous input of the auxiliary switch for controlling the opening and closing of the vacuum contactor will be described with reference to FIGS. 1 to 10.

1 to 2, as a device for preventing simultaneous injection of the auxiliary switch according to the prior art can be installed, the two vacuum contactors operated in parallel are the first vacuum contactor (Vc1), And a second vacuum contactor Vc2, a first auxiliary switch Vz1 and a second auxiliary switch Vz2. Each of the first vacuum contactor Vc1 and the second vacuum contactor Vc2 is a main component, a vacuum interrupter (not shown), an electromagnetic actuator and power transmission for opening and closing the movable contact of the vacuum interrupter. Appliances and the like.

Here, the first vacuum contactor (Vc1) and the second vacuum contactor (Vc2) are configured in parallel for the opening and closing of the power supply or interruption that is always in operation and the emergency power opening and closing in emergency operation, so that the power receiving side is connected to the power input terminal and subsequently The distribution side is connected to subsequent load side power circuits (power lines) such as high voltage motors, transformers, condensers.

The first auxiliary switch Vz1 and the second auxiliary switch Vz2 are respectively attached to the side surfaces of the first vacuum contactor Vc1 and the second vacuum contactor Vc2, and are currently present in the first vacuum contactor Vc1 and the second vacuum. A control signal for opening and closing the contactor Vc2 to a closing position (called closing position or ON position) or opening position (opening position, also known as blocking position or OFF position or trip position) is generated. The control signal may be provided as a signal for magnetizing a closing coil of an electromagnetic actuator that provides opening and closing driving force of the first vacuum contactor Vc1 and the second vacuum contactor Vc2.

As shown in FIG. 2, the first auxiliary switch Vz1 may be pivotable to pressurize the first auxiliary switch part Vz1-1 and the first auxiliary switch part Vz1-1 to open and close. A first lever Vz1-2, and the second auxiliary switch Vz2 is rotatable to pressurize the second auxiliary switch part Vz2-1 and the second auxiliary switch part Vz2-1 to open and close. The second lever Vz2-2 is included.

On the other hand, the opening and closing circuit configuration of the vacuum contactor according to the prior art including the simultaneous injection prevention circuit unit as a device for preventing the simultaneous injection of the auxiliary switch according to the prior art will be described with reference to FIGS.

In the drawings, reference numerals 1 and 2 indicate AC input terminals, and reference numerals 3 and 4 indicate both ends of the first auxiliary switch Vz1 or the second auxiliary switch Vz2.

As shown in FIG. 3, the opening and closing circuit of the first vacuum contactor according to the prior art including the auxiliary input prevention circuit part of the auxiliary switch according to the prior art is shown in FIG. 3. 1 auxiliary switch Vz1, first auxiliary switch a contact Vza1, second auxiliary switch b contact Vzb2, resistor R, input relay 7-1, first auxiliary switch relay 7-2 It is configured to include.

The rectifier circuit part 5 is connected to the AC input terminals 1 and 2, and rectifies and provides an AC applied to the AC input terminals 1 and 2 by direct current.

The varistor 6 is an element that removes a surge that may be included in the direct current output from the rectifier circuit unit 5 to the ground.

As described above, the first auxiliary switch Vz1 is rotatable to allow the first auxiliary switch part Vz1-1 and the first auxiliary switch part Vz1-1 to be pressed to open and close. In the circuit diagram of FIG. 3, it is simply represented by a symbol like a push switch.

The first auxiliary switch a contact Vza1 is a non-illustrated contact a in the interior of the first auxiliary switch part Vz1-1, that is, the first auxiliary switch part Vz1-1 is turned on as a normal open contact. When the first auxiliary switch unit (Vz1-1) is off (ie, the contact is opened), and is closed (that is, the contact is opened). The first auxiliary switch a contact Vza1 is connected to the output terminal of the first auxiliary switch Vz1.

The second auxiliary switch b contact Vzb2 is open when the second auxiliary switch part Vz2-1 is turned on as a contact b of the second auxiliary switch part Vz2-1, that is, a normally closed contact. Is a contact that is closed (i.e., the contact is closed) when the second auxiliary switch part Vz2-1 is turned off. The second auxiliary switch b contact Vzb2 is connected in series with the first auxiliary switch b contact Vzb1.

The resistor R is connected in parallel to the series circuit of the first auxiliary switch a contact Vza1 and the second auxiliary switch b contact Vzb2, and the first auxiliary switch a contact Vza1 or the second auxiliary switch b contact ( Vzb2) is a dissipation resistor that consumes the current flowing through the first auxiliary switch a contact Vza1 and the second auxiliary switch b contact Vzb2 when the Vzb2 is opened. ) Or only a negligible level of microcurrent that is insufficient to magnetize the input relay 7-1 for driving the input position of the first vacuum contactor Vc1.

The closing relay 7-1 closes the relay contact (not shown) connected to the closing coil (not shown) of the electromagnetic actuator for driving the closing position of the first vacuum contactor Vc1 (not shown) when excited. When the relay contacts to open the relay. The input relay 7-1 is connected to the output terminal of the parallel circuit of the first auxiliary switch a contact Vza1 and the second auxiliary switch b contact Vzb2 and the resistor R.

The first auxiliary switch relay 7-2 is connected in parallel with the input relay 7-1, and when excited, closes the contact connected to the on position indicator lamp of the first vacuum contactor Vc1, not shown. To turn on the on-position display lamp and turn off the on-position display lamp when the element is opened. Therefore, the first auxiliary switch relay 7-2 may be used as a relay that can be connected to the operation position display device.

As shown in FIG. 4, the opening and closing circuit of the second vacuum contactor according to the prior art, including the simultaneous input preventing circuit part of the auxiliary switch according to the prior art, includes the rectifier circuit part 5, the varistor 6, and the first circuit. 2 Auxiliary switch (Vz2), 2nd auxiliary switch a contact (Vza2), 1st auxiliary switch b contact (Vzb1), resistor (R), closing relay (7-3), second auxiliary switch relay (7-4) It is configured to include.

The rectifier circuit part 5 is connected to the AC input terminals 1 and 2, and rectifies and provides an AC applied to the AC input terminals 1 and 2 by direct current.

The varistor 6 is an element that removes a surge that may be included in the direct current output from the rectifier circuit unit 5 to the ground.

As described above, the second auxiliary switch Vz2 may be rotatable to pressurize the second auxiliary switch part Vz2-1 and the second auxiliary switch part Vz2-1 to open and close. In the circuit diagram of FIG. 4, it is simply represented by a symbol like a push switch.

The second auxiliary switch a contact Vza2 is a contact of the second auxiliary switch part (see Vz2-1 in FIG. 2), that is, the second auxiliary switch part Vz2-1 is turned on as a normal open contact. It is a contact which is closed (that is, the contact is closed) and is opened (that is, the contact is opened) when the second auxiliary switch unit Vz2-1 is turned off. The second auxiliary switch a contact Vza2 is connected to the output terminal of the second auxiliary switch Vz2.

The first auxiliary switch b contact Vzb1 is a non-illustrated b contact in the first auxiliary switch part (see Vz1-1 in FIG. 2), that is, the first auxiliary switch part Vz1-1 is turned on as a normally closed contact. It is a contact which is open when the on (i.e., the contact is opened) and closed (i.e., the contact is closed) when the first auxiliary switch section Vz1-1 is off. The first auxiliary switch b contact Vzb1 is connected in series with the second auxiliary switch a contact Vza2.

The resistor R is connected in parallel to the series circuit of the second auxiliary switch a contact Vza2 and the first auxiliary switch b contact Vzb1, and the second auxiliary switch a contact Vza2 or the first auxiliary switch b contact ( The second auxiliary switch relay 7-4 in the rear stage is a resistance resistor that consumes current flowing through the second auxiliary switch a contact Vza2 and the first auxiliary switch b contact Vzb1 when Vzb1 is opened. ) Or only a negligible level of microcurrent that is too low to magnetize the input relay 7-3 for driving the input position of the second vacuum contactor Vc2.

The closing relay 7-3 closes the relay contact (not shown) connected to the closing coil (not shown) for driving the closing position of the second vacuum contactor Vc2 (not shown) when excited, and when the element is closed, the relay is closed. Relay that opens a contact. The input relay 7-3 is connected to the output terminal of the parallel circuit of the 2nd auxiliary switch a contact Vza2 and the 1st auxiliary switch b contact Vzb1, and the resistor R. As shown in FIG.

The second auxiliary switch relay 7-4 is connected in parallel with the input relay 7-3, and when closed, closes the contact connected to the not shown on position indicator lamp of the second vacuum contactor Vc2. To turn on the on-position display lamp and turn off the on-position display lamp when the element is opened. Therefore, the second auxiliary switch relay 7-4 may be used as a relay that can be connected to the operation position display device.

An operation of the apparatus for preventing simultaneous injection of the auxiliary switch according to the related art configured as described above will be described with reference to FIGS. 5 to 7.

When the user presses the input button (ON button, not shown) of the first vacuum contactor Vc1 or transmits an input command signal from a remote location not shown in FIG. 2, the magnetic force of the coil is not shown. By the same power, the first lever Vz1-2 rotates counterclockwise as shown in FIG. 5 to press the first auxiliary switch part Vz1-1 to operate the first auxiliary switch part Vz1-1.

Then, in the circuit diagram of FIG. 6, the first auxiliary switch Vz1 is closed and the DC current from the rectifying circuit unit 5 passes through the first auxiliary switch Vz1 through the first auxiliary switch Vz1 and The second auxiliary switch flows in a parallel circuit between the contact point Vzb2 and the resistor R.

At this time, since the resistance value of the resistor R is very large, the current flowing to the resistor R is negligible, and most of the DC current is the shunt of the first auxiliary switch a contact Vza1 and the second auxiliary switch b contact Vzb2. Flows through.

 The DC current flowing through the shunt of the first auxiliary switch a contact Vza1 and the second auxiliary switch b contact Vzb2 flows through the input relay 7-1 and the first auxiliary switch relay 7-2, 7-1) and the first auxiliary switch relay 7-2 are excited.

Accordingly, the contact (not shown) of the input relay 7-1 is closed in accordance with the excitation of the input relay 7-1, and thus the not-shown input coil of the first vacuum contactor Vc1 is excited and the first vacuum contactor ( The on operation of Vc1) is performed.

In addition, according to the excitation of the first auxiliary switch relay 7-2, the contact point connected to the on position indicator lamp (not shown) of the first vacuum contactor Vc1 is closed to turn on the on position indicator lamp. Indicates that the vacuum contactor Vc1 is operated in the on position.

At this time, according to the opening of the first auxiliary switch b contact Vzb1 in FIG. 7, the reception command signal of the external second vacuum contactor Vc2 is received or the user's second vacuum contactor Vc2 is input. Even if the second auxiliary switch Vz1 is turned on by pressing a button and the second auxiliary switch a contact Vza2 is turned on, an excitation is applied to the parallel circuit of the input relay 7-3 and the second auxiliary switch relay 7-4. Since the direct current is cut off, the second vacuum contactor Vc2 does not perform the closing operation simultaneously with the first vacuum contactor Vc1, and the on position indicator lamp of the second vacuum contactor Vc2 is turned off.

However, the simultaneous input prevention circuit of the auxiliary switch according to the prior art has a first auxiliary switch Vz1 and a first auxiliary switch a contact Vza1 as shown in FIGS. 9 and 10 due to noise, magnetic disturbance, and the like. , The second auxiliary switch b contact (Vzb2) is closed, and the second auxiliary switch Vz2, the second auxiliary switch a contact (Vza2), and the first auxiliary switch b contact (Vzb1) are all closed. have.

Then, as both the input relay 7-1 and the input relay 7-3 are excited, the second vacuum contactor Vc2 and the first vacuum contactor Vc1 may be simultaneously inputted, which causes a short circuit between the main power supply and the reserve power supply. There was a problem that can cause enormous damage.

Therefore, the present invention solves the problems of the prior art in the case of operating two vacuum contactors in parallel, the object of the present invention is to prevent a short circuit accident in the auxiliary switch for two vacuum contactors operated in parallel. It is to provide a mechanical interlock mechanism of the auxiliary switch for the vacuum contactor to prevent the simultaneous input of two vacuum contactors.

An object of the present invention is for a vacuum contactor having a first vacuum contactor and a second vacuum contactor connected in parallel, and a first auxiliary switch and a second auxiliary switch connected to the first vacuum contactor and the second vacuum contactor. In the mechanical linkage of the auxiliary switch for the vacuum contactor,

One side of the first vacuum contactor is axially supported and rotatably installed, and is rotatable to a first position for pressing and operating the first auxiliary switch and to a second position that is separated from the first auxiliary switch. A first lever having an extending portion;

A lock lever having a restrained position in which rotation is constrained by the extension when the first lever is in a first position and a release position in which restraint is released rotatably when the first lever is in a second position. LEVER);

A second lever rotatably mounted on one side of the second vacuum contactor, the second lever being rotatable to a first position for pressing and operating the second auxiliary switch and to a second position separated from the second auxiliary switch; And

One end is connected to the lock lever and the other end is connected to the second lever to restrain the second lever in a second position when the lock lever is in the restrained position and the first lever when the lock lever is in the released position. It can be achieved by providing a mechanical linkage mechanism of the auxiliary switch for a vacuum contactor according to the present invention including a connecting shaft for releasing the lever to rotate to the first position.

The mechanical interlock mechanism of the auxiliary switch for a vacuum contactor according to the present invention is an auxiliary device for two vacuum contactors in a mechanical configuration including a first lever, a lock lever, a second lever and a connecting shaft having an extension extending downward. Since the interlock mechanism of the switch is configured, there is an effect that it is possible to provide an apparatus for preventing simultaneous input of two vacuum contactors that are stable regardless of electromagnetic malfunction factors such as noise signals and electromagnetic disturbances.

In the mechanical linkage mechanism of the auxiliary switch for a vacuum contactor according to the present invention, the extension portion of the first lever is located within a rotation radius of the lock lever in a first position to restrain the lock lever and the lock lever in a second position. And the auxiliary switch of the second vacuum contactor inserts and operates the second vacuum contactor when the extension lever of the first lever restrains the rotation of the lock lever. It is not possible to operate so as to, and when releasing the rotation of the extension addition lock lever of the first lever, it is possible to obtain an effect that the auxiliary switch of the second vacuum contactor can operate to insert and operate the second vacuum contactor.

In the mechanical interlock mechanism of the auxiliary switch for a vacuum contactor according to the present invention, the first lever has a first action protrusion having one end supported by the first vacuum contactor and operating the first auxiliary switch at the other end. A first lever having a first lever body, a connecting portion connected to the first lever body, and the extending portion extending downward from the connecting portion, the first lever being supported by the first vacuum contactor and being provided with a first auxiliary The switch can be operated, and the lock lever can be restrained or released by the extension part.

In the mechanical interlock mechanism of the auxiliary switch for vacuum contactor according to the present invention, the second lever has a second action protrusion having one end supported by the second vacuum contactor and operating the second auxiliary switch at the other end. Since it includes a connecting member having a second lever body having, a first connecting portion connected to the first lever body, and a second connecting portion formed to extend upward from the first connecting portion and connected to the connecting shaft, The second auxiliary switch can be operated while the second lever is supported by the second vacuum contactor, and is connected to the connecting shaft so as to interlock with the lock lever and the extension of the first lever, that is, in conjunction with the first auxiliary switch. The switch may perform the closing operation or the closing operation may be prohibited.

In the mechanical interlock mechanism of the auxiliary switch for a vacuum contactor according to the present invention, the bottom surface of the extension portion is composed of a curved surface formed convexly downward, so that the lock lever is released when releasing the rotation of the extension addition lock lever of the first lever. An effect that can be separated from the bottom of the extension portion can be obtained smoothly.

1 is a partial cutaway front view showing the appearance of the first vacuum contactor, the second vacuum contactor, the first auxiliary switch and the second auxiliary switch provided with a simultaneous injection preventing device according to the prior art,
FIG. 2 illustrates a first auxiliary switch and a second auxiliary switch which are in an off state (open state) by not receiving an input command signal from the outside in the first vacuum contactor, the second vacuum contactor, the first auxiliary switch, and the second auxiliary switch of FIG. 1. This is a side view showing the external appearance of the switch.
3 is a circuit diagram illustrating an opening and closing circuit configuration of a first vacuum contactor including a simultaneous input preventing circuit unit according to the prior art and being in an off state (open state) by not receiving an input command signal from the outside,
4 is a circuit diagram illustrating an opening and closing circuit configuration of a second vacuum contactor including a simultaneous input preventing circuit unit according to the prior art and being in an off state (opening state) by not receiving an input command signal from the outside,
FIG. 5 is an input state (closed state, that is, an ON state) in the first vacuum contactor, the second vacuum contactor, the first auxiliary switch, and the second auxiliary switch of FIG. Is a side view showing the appearance of the first auxiliary switch and the second auxiliary switch in the open state (OFF state),
FIG. 6 is a circuit diagram illustrating a closing operation state of an opening and closing circuit of a first vacuum contactor in a state in which only a first auxiliary switch receives a closing command signal from the outside (closed state, that is, an ON state);
7 is a circuit diagram illustrating a state in which the opening and closing circuit of the second vacuum contactor is opened (OFF operation) in a state in which only the first auxiliary switch receives an input command signal from the outside (closed state, that is, an ON state).
FIG. 8 is a side view illustrating the external appearance of the first auxiliary switch and the second auxiliary switch in the first vacuum contactor, the second vacuum contactor, the first auxiliary switch, and the second auxiliary switch of FIG.
FIG. 9 is a circuit diagram showing an operating state of an opening and closing circuit of a first vacuum contactor which is operated simultaneously due to a malfunction of the simultaneous injection prevention circuit unit.
FIG. 10 is a circuit diagram showing an operating state of an opening and closing circuit of a second vacuum contactor which is simultaneously operated by a malfunction of the simultaneous injection prevention circuit unit.
FIG. 11 is a partial cutaway front view illustrating an external configuration of a mechanical interlock mechanism, a first vacuum contactor, a second vacuum contactor, a first auxiliary switch, and a second auxiliary switch of an auxiliary switch for a vacuum contactor according to an exemplary embodiment of the present invention;
12 is a front view showing the external configuration of the mechanical interlock mechanism, the first auxiliary switch and the second auxiliary switch of the auxiliary switch for a vacuum contactor according to an embodiment of the present invention,
FIG. 13 is a side view illustrating an external configuration of a mechanical interlock mechanism of a auxiliary switch for a vacuum contactor, a first vacuum contactor, a second vacuum contactor, a first auxiliary switch, and a second auxiliary switch according to an exemplary embodiment of the present invention. An operating state diagram showing an operating state in which the auxiliary switch and the second auxiliary switch are in the open position (off position),
FIG. 14 is a side view illustrating an external configuration of a mechanical interlock mechanism of a auxiliary switch for a vacuum contactor, a first vacuum contactor, a second vacuum contactor, a first auxiliary switch, and a second auxiliary switch according to a preferred embodiment of the present invention. The auxiliary switch operates in the closing position (on position) and the second auxiliary switch is an operating state diagram showing an operating state in which the operation to the closing position is prevented.
FIG. 15 is a side view illustrating the external configuration of the mechanical interlock mechanism of the auxiliary switch for the vacuum contactor, the first vacuum contactor, the second vacuum contactor, the first auxiliary switch, and the second auxiliary switch, according to a preferred embodiment of the present invention; The auxiliary switch operates in the closing position (on position) and the first auxiliary switch is an operating state diagram showing an operating state in which the operation to the closing position is prevented.

The object of the present invention and the constitution of the present invention to achieve the same and its effect are the configuration and effect of the mechanical interlock mechanism of the auxiliary switch for a vacuum contactor according to the preferred embodiment of the present invention with reference to the accompanying Figures 11 to 15 It will be more clearly understood by the following description.

In FIG. 11, two vacuum contactors connected in parallel with a mechanical interlock mechanism according to an exemplary embodiment of the present invention are connected to the first vacuum contactor Vc1, the second vacuum contactor Vc2, and the first auxiliary switch Vz1. And a second auxiliary switch Vz2.

The first vacuum contactor Vc1 and the second vacuum contactor Vc2 may be used for power supply switching of main power supply and reserve power supply or interruption, respectively, and are mounted in an enclosure such as a distribution board and placed on upper and lower parts as shown in FIG. 11. It can be arranged in a stack.

One side of the first vacuum contactor Vc1 and the second vacuum contactor Vc2 is provided with a first auxiliary switch Vz1 and a second auxiliary switch Vz2 as shown in FIG. 11, respectively.

On the other hand, the configuration of the mechanical interlock mechanism of the auxiliary switch for a vacuum contactor according to an embodiment of the present invention will be described with reference to FIGS.

12 is a front view showing the external configuration of the mechanical interlock mechanism, the first auxiliary switch and the second auxiliary switch of the auxiliary switch for a vacuum contactor according to an embodiment of the present invention, Figure 13 is a vacuum according to a preferred embodiment of the present invention A side view showing the external configuration of the mechanical interlock mechanism of the auxiliary switch for the contactor, the first vacuum contactor, the second vacuum contactor, the first auxiliary switch and the second auxiliary switch.

The mechanical interlock mechanism (hereinafter referred to as interlock mechanism) of the auxiliary switch for the vacuum contactor according to the preferred embodiment of the present invention is the first lever (Vz1-2), lock lever (LOCK LEVER) 10, the second lever (Vz2) -2), the connecting shaft (11).

As shown in FIG. 13, the first lever Vz1-2 is pivotally supported by one side of the first vacuum contactor Vc1 by the rotation shaft Vc1-1 and is rotatably installed. The first lever Vz1-2 has a first position and a first auxiliary position for operating by pressing the first auxiliary switch Vz1, more specifically, the first auxiliary switch part Vz1-1 of the first auxiliary switch Vz1. It is rotatable to the 2nd position isolate | separated from the 1st auxiliary switch part Vz1-1 of the switch Vz1.

The first lever Vz1-2 also includes a first lever body 9 and an extension 9-1.

The first lever body 9 is provided with a first action protrusion having one end supported by the rotational axis Vc1-1 of the first vacuum contactor Vc1 and operating the first auxiliary switch part Vz1-1 at the other end. (9a).

As can be seen in FIG. 12, the extension portion 9-1 is connected to the first lever body 9 and positioned to be in contact with the bottom surface of the first lever body 9. 9-1a and an extension part formed on the connection part, that is, the upper plate part 9-1a, which is bent at right angles and extends downward, includes a lower extension plate part 9-1b.

As shown in FIGS. 12 and 13, the extension part 9-1 is formed separately from the first lever Vz1-2, and the first lever of the first lever Vz1-2 is formed by a bolt and a nut. It may be connected to the body 9 and may be formed integrally with the first lever body 9 of the first lever Vz1-2. Therefore, the extension part 9-1 rotates together in the same direction according to the rotation to the 1st position or the 2nd position of the 1st lever Vz1-2 by the rotational drive of the rotating shaft Vc1-1.

Moreover, the extension part 9-1 is located within the rotation radius of the lock lever 10 in a 1st position, restrains the lock lever 10, and locks away from the rotation radius of the lock lever 10 in a 2nd position. It includes the bottom surface (9-1c) to allow the rotation of the lever 10.

According to a preferred aspect of the present invention, the bottom surface 9-1c is composed of a curved surface which is formed convexly downward as shown in FIG. 13. As the bottom surface 9-1c of the extension portion 9-1 is configured as a downwardly curved surface, the extension portion 9-1 of the first lever Vz1-2 is configured to rotate the lock lever 10. When releasing, the lock lever 10 can smoothly escape from the bottom surface 9-1c of the extension portion 9-1.

Moreover, the extension part 9-1 is caught by the lock lever 10 in a 2nd position, and the rotation of the 1st lever Vz1-2 is restrained, and the side surface which is allowed to rotate by the release of the lock lever 10 is carried out. (9-1d).

The lock lever 10 is a lever rotatable about a support shaft 10a fixed to a supporting bracket 10b, as can be seen from FIGS. 13 to 15. Here, the support bracket 10b may be fixedly installed by a fastening means such as a bolt nut on an upper surface of the loading plate of the switchboard on which the first vacuum contactor Vc1 is mounted.

The lock lever 10 has a restraint position at which rotation is constrained by the extension 9-1 when the first lever Vz1-2 is in the first position, and the first lever Vz1-2 is in the second position. It has a release position in which the restraint is released freely when it is at.

As shown in FIG. 12, the second lever Vz2-2 is pivotally supported by one side of the second vacuum contactor Vc2 by the rotation shaft Vc2-1 and is rotatably installed. The second lever Vz2-2 has a first position and a second auxiliary position for pressing and operating the second auxiliary switch Vz2, more specifically, the second auxiliary switch part Vz2-1 of the second auxiliary switch Vz2. It is rotatable to the 2nd position separated from the 2nd auxiliary switch part Vz2-1 of the switch Vz2.

The second lever Vz2-2 includes a second lever body 13 and a connecting member 12.

The second lever body 13 has one end (left end in FIG. 13) supported by the rotating shaft Vc2-1 on the second vacuum contactor Vc2 and the other end (right end in FIG. 13). Has a second action protrusion 13a for operating the second auxiliary switch unit Vz2-1.

The connecting member 12 is a means for connecting the connecting shaft 11 and the second lever Vz2-2, and as shown in FIG. 12, the connecting member 12 includes the second lever Vz2-2. A first connecting portion 12a connected to the first lever body 13 of the second lever 12a and a second connecting portion 12b formed to extend upward from the first connecting portion 12a and connected to the connecting shaft 11. Have The first connecting portion 12a may be configured as a horizontal extension plate portion, and the second connecting portion 12b may be configured as a vertical extension plate portion bent perpendicularly from the first connecting portion 12a and extending in the vertical direction. In addition, in the connecting member 12, one side of the first connecting portion 12a may be connected to the first lever body 13 with a bolt and a nut as one end of the connecting member 12, and the connecting member 12 may be connected to the first lever body 13. One end of the second connecting portion 12b may be connected to the connecting shaft 11 by a fastening means such as a bolt and a nut.

The connecting shaft 11 is composed of a rod or a wire having a connecting terminal portion having a diameter larger than the middle portion for connection at both ends, and one end of the connecting shaft 11 is the lock lever 10. The other end of the connecting shaft 11 is connected to the connecting member 12 of the second lever Vz2-2.

The connecting shaft 11 restrains the second lever Vz2-2 at the second position when the lock lever 10 is in the restrained position, and the second lever Vz2-2 when the lock lever 10 is at the released position. ) To rotate to the first position. Here, the restrained position of the connecting shaft 11 is caught by the bottom surface 9-1c of the extension 9-1 in a state in which the lock lever 10 is rotated counterclockwise as shown in FIG. As the position where rotation is prevented in the direction, the connecting shaft 11 is a position at which the ascending is prevented at the lowered position at this time.

  Further, the position at which the connecting shaft 11 is released is a position where the lock lever 10 is separated from the bottom surface 9-1c of the extension portion 9-1 as shown in FIG. 15, and the connecting shaft 11 is at this time. As the lift is allowed, and thus the counterclockwise rotation of the connecting member 12 is allowed, the second actuating protrusion 13a of the second lever Vz2-2 operates the second auxiliary switch unit Vz2-1. As a result, the second vacuum contactor Vc2 can be operated to the input position (on position).

The operation of the interlock mechanism according to the preferred embodiment of the present invention configured as described above will be described with reference to FIGS. 12 to 15, in particular FIGS. 14 and 15.

First, as shown in FIG. 13, the first auxiliary switch Vz1 and the second auxiliary switch Vz2 are both in the open position (off position), that is, the first actuating protrusion of the first auxiliary switch Vz1 ( 9a) is a second position separated from the first auxiliary switch part Vz1-1, and the second actuating protrusion 13a of the second auxiliary switch Vz2 is also separated from the second auxiliary switch part Vz2-1. In the second position, any one of the first auxiliary switch Vz1 and the second auxiliary switch Vz1 may be driven to the input position.

That is, the first lever body in which the rotating shaft Vc1-1 or the rotating shaft Vc2-1 rotates according to the input command signal, and one end of which is connected to the rotating shaft Vc1-1 or the rotating shaft Vc2-1 accordingly. (9) or the first actuating protrusion 9a provided at the other end of the first lever body 9 or the second lever body 13 by rotating the second lever body 13 counterclockwise or The second action protrusion 13a contacts and pressurizes the first auxiliary switch portion Vz1-1 or the second auxiliary switch portion Vz2-1 to operate the closing operation.

Electromagnetic actuator that provides opening and closing driving force of the first vacuum contactor Vc1 or the second vacuum contactor Vc2 according to the closing operation of the first auxiliary switch section Vz1-1 or the second auxiliary switch section Vz2-1. The excitation control signal for magnetizing the closing coil of the second coil is emitted from the first auxiliary switch unit Vz1-1 or the second auxiliary switch unit Vz2-1 to form the first vacuum contactor Vc1 or 2 The vacuum contactor Vc2 operates in the on position.

If the user presses the input button (ON button, not shown) of the second vacuum contactor Vc2 in the state shown in FIG. 13 or transmits an input command signal from a remote location not shown, the rotating shaft Vc2-1 is half Rotate clockwise.

Accordingly, the second lever body 13, one end of which is connected to the rotation shaft Vc2-1, rotates counterclockwise, and the second lever body 13 rotates counterclockwise, whereby the second lever body ( The second actuating protrusion 13a provided at the other end of 13) contacts and pressurizes the second auxiliary switch unit Vz2-1 to operate the closing operation.

According to the closing operation of the second auxiliary switch unit Vz2-1, an excitation control signal for magnetizing the closing coil of the electromagnetic actuator that provides the opening and closing driving force of the second vacuum contactor Vc2 is generated. It is extracted from the auxiliary switch part Vz2-1, and the 2nd vacuum contactor Vc2 operates to an on position.

At this time, the connecting member 12 whose one side is connected to the second lever body 13 also rotates counterclockwise.

The connecting shaft 11 connected to the other side of the connecting member 12 rises, and at this time, the extension part 9-1 of the first lever Vz1-2 releases the lock lever 10, thereby providing a lock lever ( 10 rotates clockwise, the front surface is in a state as shown in Fig. 15 in which the front surface 9-1d of the extension portion 9-1 contacts.

In this state, the extension portion 9-1 of the first lever Vz1-2 is caught by the lock lever 10 in the second position so that counterclockwise rotation is impossible, and therefore, the first auxiliary switch Vz1 The closing position operation is prohibited. Therefore, even if a user presses an input button (ON button, not shown) of the first vacuum contactor Vc1 or transmits an input command signal of the first vacuum contactor Vc1 from a remote location not shown in the drawing, the first vacuum contactor Vc1 may be used. Is prevented from operating to the feeding position.

On the other hand, when the user presses the input button (ON button, not shown) of the first vacuum contactor Vc1 in the state shown in FIG. The rotary shaft Vc1-1 rotates counterclockwise.

Accordingly, the first lever body 9, one end of which is connected to the rotary shaft Vc1-1, rotates counterclockwise, and the first action protrusion 9a provided on the other end of the first lever body 13 is rotated. As shown in FIG. 14, the first auxiliary switch unit Vz1-1 is contacted and pressed to operate the closing operation.

According to the closing operation of the first auxiliary switch unit Vz1-1, an excitation control signal for magnetizing the closing coil of the electromagnetic actuator providing the opening and closing driving force of the first vacuum contactor Vc1 is provided. Extracted from the auxiliary switch part Vz1-1, the 1st vacuum contactor Vc1 operates to an on position.

At this time, the extension portion 9-1, one side of which is connected to the first lever body 9, also rotates counterclockwise.

Accordingly, the extension portion 9-1 of the first lever Vz1-2 is positioned in the clockwise rotational trajectory of the lock lever 10 as one side of the bottom surface 9-1c is shown in FIG. 14. Constrain the clockwise rotation of the lever 10.

In this state, the lock lever 10 is constrained in a clockwise rotation impossible, and thus the connecting shaft 11 having one end connected to the lock lever 10 remains in a lowered state.

Accordingly, the connecting member 12 having one end connected to the other end of the connecting shaft 11 and the second lever body 13 connected to the connecting member 12 are prohibited from counterclockwise rotation, and thus the second lever. The second actuating protrusion 13a provided at one end of the body 13 is separated from the first auxiliary switch part Vz12-1, so that the second auxiliary switch Vz2 is restrained in the second position. The closing position operation of the second auxiliary switch Vz2 is prohibited.

As described above, the mechanical interlock mechanism of the auxiliary switch for a vacuum contactor according to the present invention includes a first lever Vz1-2, a lock lever 10, and a second lever having an extended portion 9-1 extending downward. (Vz2-2) and the connecting shaft 11, the mechanical configuration of the auxiliary switch for the two vacuum contactor constitutes the interlocking mechanism, so that regardless of electromagnetic malfunction factors such as noise signals, electromagnetic disturbances The effect of preventing a short circuit accident can be obtained by preventing simultaneous input of the vacuum contactor.

Vc1: first vacuum contactor Vc2: second vacuum contactor
Vz1: first auxiliary switch Vz2: second auxiliary switch
Vz1-1: 1st auxiliary switch part Vz1-2: 1st lever
Vz2-1: Second auxiliary switch part Vz2-2: Second lever
Vza1: first auxiliary switch a contact Vza2: second auxiliary switch a contact
Vzb1: first auxiliary switch b contact Vzb2: second auxiliary switch b contact
R: resistance
1, 2: AC input terminal 3, 4: Both ends of the first auxiliary switch or the second auxiliary switch
5: rectifier circuit part 6: varistor
7-1: input relay 7-2: first auxiliary switch relay
7-3: input relay 7-4: 2nd auxiliary switch relay
9: first lever body 9a: first actuating protrusion
9-1: extension part 9-1a: upper plate part
9-1b: downward extension plate part 9-1c: bottom
10: lock lever 10a: rotating shaft
11: connecting shaft 12: connecting member
12a: first connection part 12b: second connection part
13: second lever body 13a: second action stone

Claims (5)

A vacuum contactor having a first vacuum contactor and a second vacuum contactor connected in parallel and a first auxiliary switch and a second auxiliary switch connected to the first vacuum contactor and the second vacuum contactor, In the mechanical linkage,
One side of the first vacuum contactor is axially supported and rotatably installed, and is rotatable to a first position for pressing and operating the first auxiliary switch and to a second position that is separated from the first auxiliary switch. A first lever having an extending portion;
A lock lever having a restrained position in which rotation is constrained by the extension when the first lever is in a first position and a release position in which restraint is released rotatably when the first lever is in a second position. LEVER);
A second lever rotatably mounted on one side of the second vacuum contactor, the second lever being rotatable to a first position for pressing and operating the second auxiliary switch and to a second position separated from the second auxiliary switch; And
One end is connected to the lock lever and the other end is connected to the second lever to restrain the second lever in a second position when the lock lever is in the restrained position and the first lever when the lock lever is in the released position. And a connecting shaft for releasing the lever to rotate to the first position. 2. The method of claim 1,
The extension of the first lever is
A bottom surface positioned within the turning radius of the lock lever in a first position to constrain the lock lever and deviating from the turning radius of the lock lever in a second position to allow rotation of the lock lever; Mechanical interlock mechanism of auxiliary switch for contactor. The method of claim 1,
The first lever,
A first lever body having one end supported by the first vacuum contactor and having a first actuating protrusion for operating the first auxiliary switch at the other end; And
And a connecting portion connected to the first lever body and the extending portion extending downwardly from the connecting portion. The method of claim 1,
The second lever,
A second lever body having a second actuating protrusion having one end supported by the second vacuum contactor and operating the second auxiliary switch at the other end; And
And a connecting member having a first connecting portion connected to the first lever body and a second connecting portion extending upwardly from the first connecting portion and connected to the connecting shaft. Mechanical interlock mechanism of auxiliary switch. The method of claim 2,
The bottom surface is a mechanical interlock mechanism of the auxiliary switch for a vacuum contactor, characterized in that consisting of a curved convex downward.

Images