KR20200000199A - Modularized auxiliary contact and current circuit breaker having simple structure - Google Patents

Abstract

The present invention relates to a modularized auxiliary contact and a circuit breaker having the same. The circuit breaker according to an embodiment of the present invention comprises: a fixed contact and a moving contact being in contact with and separate from each other to conduct and block a current; a first mover having one side in which the moving contact is formed; a second mover connected to the first mover and rotating around a driving shaft; a latch having one end connected to the second mover and rotating according to rotational movement of the second mover; a display part connected to the other end of the latch and displaying whether the fixed contact is in contact with the moving contact according to rotational movement of the latch; and a counter connected to the other end of the latch and counting at least one of the number of times of contact and separation of the fixed contact and the moving contact according to the rotational movement of the latch.

Description

Modular Auxiliary Contact and Breaker with same {MODULARIZED AUXILIARY CONTACT AND CURRENT CIRCUIT BREAKER HAVING SIMPLE STRUCTURE}

The present invention relates to a modular auxiliary contact and a circuit breaker having the same.

In general, a circuit breaker refers to a device that cuts off a current in a transmission / transmission system or an electric circuit in the event of opening / closing a load or an accident such as grounding or short circuit. In addition, the breaker can manually open and close the line in normal use, or can be opened and closed at a long distance by an electric operation device outside the metal container, and can protect the power system and the load by automatically blocking the line in case of overload and short circuit. .

In order to block the line, the breaker is provided with a fixed contactor and a movable contactor. When a normal current flows because a failure does not occur in a transmission transformer system or an electric circuit, the fixed contactor and the movable contactor come into contact with each other and current flows through the breaker. When a fault occurs in a transmission transformer system or an electric circuit and a fault current flows, the movable contact is disconnected from the fixed contact to block the fault current.

These breakers are equipped with a separate auxiliary contact. The auxiliary contact is operated according to the connection and separation of the fixed contactor and the movable contactor to inform the outside whether to open or close the breaker.

That is, when the line in the normal use state is energized, the breaker is connected through the indicator connected to the auxiliary contact point (in this case, the movable contact point is connected to the fixed contact point), and the auxiliary contact point may be Connected indicators indicate that the breaker is in a blocked state.

However, the following problem occurs with the circuit breaker of this structure.

In general, the breaker is provided with a display for indicating the operating state of the breaker and a counter for displaying the number of operations. The display unit is connected to the auxiliary contact to indicate an operating state of the circuit breaker according to the driving of the auxiliary contact. On the other hand, the counter is not directly connected to the auxiliary contact and is directly connected to the movable contactor to display the number of times of operation of the breaker as the movable contactor is driven.

In other words, in the general circuit breaker, the display unit and the counter display the driving state of the circuit breaker by different mechanisms, which complicates the structure of the circuit breaker. there was.

It is an object of the present invention to provide an auxiliary contact and a circuit breaker having the same, in which the auxiliary contact, the display unit, and the counter can be modularized, thereby reducing the volume.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention, which are not mentioned above, can be understood by the following description, and more clearly by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

The circuit breaker according to an embodiment of the present invention includes a fixed contactor and a movable contactor which are in contact with and separated from each other to conduct and cut off a current, a first mover having the movable contactor formed at one side thereof, and connected to the first mover. A second mover that rotates about a second mover, one end of which is connected to the second mover and rotates in accordance with the rotational movement of the second mover, and the other end of the latch is connected to the latch A display unit indicating whether the fixed contactor and the movable contactor are in contact, and a counter connected to the other end of the latch and counting at least one of a contact number and a disconnection time of the fixed contactor and the movable contactor according to a rotational movement of the latch. do.

According to the present invention, as the display unit and the counter are driven in a modular manner with the auxiliary contact, it is possible to count whether the breaker is driven and the number of times of driving. Thus, the structure of the circuit breaker can be simplified and the manufacturing cost can be reduced as compared with the conventional method in which the display of the circuit breaker and the counting of the drive are performed by separate mechanisms.

In addition, according to the present invention it is possible to minimize the size of the circuit breaker according to the modularization of the display unit, the counter and the auxiliary contact.

1 is a perspective view showing the appearance of a circuit breaker according to the present invention;
2 is a cross-sectional view showing the structure of a circuit breaker according to the present invention.
3a and 3b is a view showing an auxiliary contact included in the breaker according to the present invention.
4 is a view showing the structure of the auxiliary contact according to the present invention.
5a and 5b show the operation of a circuit breaker according to the invention;
6a and 6b show the driving of the auxiliary contact of the circuit breaker according to the invention;
7 shows a display portion of a circuit breaker according to the present invention;
8 is a view showing a state identifier displayed through the display unit in accordance with the operation of the breaker according to the present invention.
9 and 10 are views showing the operation of the counter according to the operation of the circuit breaker according to the present invention.
11 is a view showing a counting result displayed on the counter according to the operation of the breaker according to the present invention.

The above objects, features, and advantages will be described in detail with reference to the accompanying drawings, whereby those skilled in the art to which the present invention pertains may easily implement the technical idea of the present invention. In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 is a view showing a circuit breaker 100 according to the present invention.

As shown in FIG. 1, in the circuit breaker 100 according to the present invention, a fixed contactor and a movable contactor are disposed inside the case 104, and a display unit 152 and a counter 154 are disposed outside the case 104. Is placed.

Although described later, the fixed contactor and the movable contact disposed inside the case 104 conduct current in a transmission transformer system or an electric circuit by contacting each other, and the fixed contactor and the movable contactor are separated to block the flow of current. The case 104 is provided with a detection unit for detecting an accident current, and when it is determined by the detection unit that a normal current flows in a transmission transformer system or an electric circuit without generating an accident current, the fixed contactor and the movable contactor The contact state is maintained so that current flows continuously in the transmission system or the electric circuit. In addition, when a fault occurs in a transmission transformer system or an electric circuit and a fault current is detected in the detection unit, the movable contactor is driven and separated from the fixed contactor, thereby preventing the fault current.

The display unit 152 displays the driving state of the breaker 100. That is, the conduction and interruption of current are displayed on the display unit 152. At this time, the display unit 152 displays the conduction and interruption of current by the operation of the auxiliary contact connected to the movable contact. For example, the auxiliary contact is driven as the movable contactor is in contact with and separated from the fixed contactor. The driving contact and disconnection state of the current are displayed on the display unit 152 by the driving.

The counter 154 counts and displays at least one of the number of times the breaker 100 is driven, that is, the number of times of contact between the fixed contactor and the movable contactor and the number of disconnections. That is, the counter 154 is counted whenever the movable contactor is driven to contact and separate from the fixed contactor and displayed through the counter 154. At this time, the counter 154 counts the driving of the breaker 100 by driving the auxiliary contact connected to the movable contact.

As described above, in the present invention, the display unit 152 and the counter 154 are modularized with the auxiliary contact, and thus the display unit 152 and the counter 154 may be counted to display the number of driving and display of the breaker 100. Therefore, the structure of the circuit breaker 100 can be simplified and the manufacturing cost can be reduced, compared with the conventional method in which the display of the circuit breaker 100 and the driving counting are performed by separate mechanisms. In addition, according to the present invention, the size of the circuit breaker 100 can be minimized according to the modularization of the display unit 152, the counter 154, and the auxiliary contact.

2 is a cross-sectional view of the circuit breaker 100 according to the present invention, and FIGS. 3A and 3B are views illustrating auxiliary contacts included in the circuit breaker 100.

As shown in the figure, the circuit breaker 100 according to the present invention is fixed to the inside of the case 104 by the bracket 118 disposed inside the case 104 and the bracket 118 to conduct current and cut off. The fixed contact 160 and the movable contactor 170, the auxiliary contact 190 is connected to the movable contactor 170 to drive as the movable contactor 170 operates, and is connected to the auxiliary contact 190 And a display unit 152 for displaying the operation of the movable contactor 170 and a counter 154 for counting the number of times of operation of the breaker 100.

The fixed contact 160 is fixed to the bracket 118 disposed inside the case 104. The movable contactor 170 is disposed on one surface of the first mover 180, and the first mover 180 is fixedly connected to the second mover 182. The second mover 182 is disposed to be rotatable about the mover drive shaft 172 fixed to the bracket 118. The second mover 182 is connected to a drive means (not shown) such as a motor, and is operated by the drive means when a change (that is, generation of a fault current) occurs in a transmission transformer system or an electric circuit. It rotates about the magnetic drive shaft 172.

As the second mover 182 rotates, the movable contactor 170 contacts or separates from the fixed contactor 160. For example, as the second mover 182 rotates clockwise around the mover drive shaft 172, the first mover 180 connected to the second mover 182 may be the fixed contactor. The movable contact 170 may be in contact with the fixed contact 160 by moving in the direction toward 160 (current flow). On the contrary, as the second mover 182 rotates counterclockwise around the mover drive shaft 172, the first mover 180 connected to the second mover 182 is fixed to the contactor 160. The movable contact 170 may be separated from the fixed contact 160 by moving in a direction away from the current (blocking current).

The first mover 180 is provided with a connection bar 174. One end of the connection bar 174 is connected to the first mover 180, and the other end of the connection bar 174 is connected to one end of the latch 120 by the connection bar drive shaft 140. The connecting bar 174 rotates as the connecting bar 174 connected to the first mover 180 as the second mover 182 rotates. Accordingly, the latch 120 connected by the connecting bar drive shaft 140 rotates. For example, when the second mover 182 rotates clockwise (current flow), the connecting bar 174 moves upward and the second mover 182 rotates counterclockwise ( When the current is blocked), the connection bar 174 may move downward.

The auxiliary contact 190 is disposed between the display unit 152 and the counter 154 and the first mover 180 to transmit the driving force of the first mover 180 to the display unit 152 and the counter 154. To indicate whether the fixed contactor 160 and the movable contactor 170 are in contact with each other and the number of times of contact.

As shown in FIG. 4, the auxiliary contact is disposed at the latch 120, at one end of the latch 120, at a coupling pin 125 coupled to the display unit 152, and at the other end of the latch 120. A connection shaft 122 coupled to the connection bar 174 of the movable contactor 170, a latch pin 132 disposed in an intermediate region of the latch 120 and serving as a center of rotation of the latch 120; A guide groove 124 is disposed between the latch pin 132 and the connecting shaft 122 to guide the rotation of the latch 120.

The latch 120 is formed in a thin bar shape to transmit the driving force of the second mover 182 to the display unit 152 and the counter 154. Accordingly, the driving of the second movable member 182, that is, whether the fixed contactor 160 and the movable contactor 170 are in contact with each other is displayed through the display unit 152, and the number of times of contact between the fixed contactor 160 and the movable contactor 170. Is counted through the counter 154.

The connecting shaft 122 is coupled to the connecting bar 174 provided in the movable contactor 170. In this case, since the connection shaft 122 rotatably penetrates the latch 120, the movement of the connection shaft 122 may be converted into the rotation movement of the latch 120.

The latch pin 132 rotatably penetrates the latch 120 so that the latch 120 rotates about the latch pin 132. Thus, as the second mover 182 rotates, the latch 120 also rotates. For example, when the second mover 182 rotates clockwise (flow of current), the connection bar 174 and the connection shaft 122 coupled with the first mover 180 move upward. The latch 120 rotates counterclockwise about the latch pin 132. When the second mover 182 rotates in the counterclockwise direction (blocking current), the connecting bar 174 and the connecting shaft 122 move downward, so that the latch 120 is centered on the latch pin 132. Rotate clockwise.

The latch pin 132 may be installed in the middle of the latch 120, but is not limited thereto. For example, the latch 120 may be formed at 1/3 or 1/4 or 2/3 or 1/4 of the distance from the coupling pin 125 to the connection shaft 122.

As the latch 120 rotates in a clockwise or counterclockwise direction, the display unit 152 connected to the latch 120 may move upward or downward to indicate the flow and interruption of current.

The guide groove 124 guides the rotational movement of the latch 120 when converting the rotational movement of the movable contactor 170 into the rotational movement of the latch 120. Although described later, the guide groove 124 is formed long along the longitudinal direction of the latch 120 and the guide bar is inserted. When the latch 120 rotates, the guide bar moves along the guide groove 124, so that the length of the latch 120 when the rotational movement of the second mover 182 is converted into the rotational movement of the latch 120. The interference caused by the difference can be eliminated.

In addition, the first coupling pin 125, one end of which is attached to the latch 120, moves when the latch 120 rotates about the latch pin 132 to move the display panel (not shown) of the display unit 152. By moving, the breaker 100 is driven, that is, whether the fixed contactor 160 and the movable contactor 170 are displayed. As the second mover 182 is driven as described above, the driving force of the second mover 182 is transmitted to the display unit 152 to quickly display whether the breaker 100 is driven. In addition, the present invention does not require any structure other than the mechanical structure for transmitting the driving force of the second mover 182, for example, electrical wiring and a switch, thereby simplifying the structure of the auxiliary contact and reducing the manufacturing cost. It becomes possible.

A first counter bar 126 is connected to the other end of the first coupling pin 125. One end of the first counter bar 126 is connected to the first coupling pin 125 and the other end is connected to the second counter bar 128 through the second coupling pin 127.

When the first coupling pin 125 is moved as the movable contactor 170 is driven, the first counter bar 126 is moved up and down. As the first counter bar 126 moves up and down, the second counter bar 128 connected to the first counter bar 126 moves to operate a counter connected to the other end of the second counter bar 128. By the operation of the counter, at least one of the number of driving of the movable contactor 170, that is, the number of times of contact between the fixed contactor 160 and the movable contactor 170 and the number of detachment of the movable contactor 170 is counted.

Hereinafter, the driving of the circuit breaker 100 according to the present invention will be described in detail with reference to FIGS. 5A to 11.

5A and 5B are views showing the driving of the breaker 100 according to the present invention, and FIGS. 6A and 6B are views showing the driving of the auxiliary contact provided in the breaker 100 in detail.

As shown in FIG. 5A, when an error occurs in a transmission transformer system or an electric circuit and a fault current occurs, the driving means connected to the second mover 182 is driven to operate the second mover 182. It rotates counterclockwise about the drive shaft 172. Accordingly, the first mover 180 connected to the second mover 182 also rotates counterclockwise. As the first mover 180 rotates in the counterclockwise direction, the movable contactor 170 is separated from the fixed contactor 160, thereby blocking the current applied to the load.

In addition, as shown in FIG. 5B, when a normal current flows due to no abnormality in the transmission transformer system or the electric circuit, the driving means connected to the second mover 182 is driven so that the second mover 182 is moved by the mover drive shaft. Rotate clockwise about 172. Accordingly, the first mover 180 connected to the second mover 182 also rotates clockwise. As the first mover 180 rotates in the clockwise direction, the movable contactor 170 contacts the fixed contactor 160 so that the breaker 100 maintains the conduction state, so that the normal current is transmitted to the transmission transformer system or the electric circuit. Supplied.

Although not shown in the drawings, abnormalities in the transmission transformer system or the electric circuit may be detected by a detector such as a current meter or a voltage meter included in the circuit breaker 100, or may be detected in a separate detector provided outside the circuit breaker 100. May be detected to provide a detection signal to the circuit breaker 100.

When a state change (change from the normal state to the fault state or from the fault state to the normal state) of the transmission power transmission system or the electric circuit occurs, the second mover 182 is rotated by a driving means such as a motor. do. In this case, driving of the driving means may be performed manually by an operator who recognizes a change in the state of a transmission transformer system or an electric circuit, or may be automatically performed according to a detection signal from a detection unit.

When the second mover 182 rotates, the connection bar 174 connected to the first mover 180 moves upward or downward. Accordingly, one end of the latch 120 connected to the connection bar 174 moves upward or downward.

A hole (not shown) is formed in the latch 120, and a latch pin 132 fixed to the auxiliary box 110 is rotatably inserted into the hole. Accordingly, when one end of the latch 120 moves downward, the latch 120 rotates counterclockwise around the latch pin 132 so that the other end of the latch 120 moves upward. On the contrary, when one end of the latch 120 moves upward, the latch 120 rotates counterclockwise about the latch pin 132 so that the other end of the latch 120 moves downward. The latch pins 132 may be fixed to a pair of auxiliary boxes 110 disposed on both sides of the latch pins 132, respectively.

Meanwhile, although the connecting bar 174 moves in the vertical direction when the second mover 182 rotates, the connecting bar 174 does not move in a straight line perpendicular to the ground, but moves in a vertical direction along a curve. Done. In addition, the end of the latch 120 coupled with the connecting bar 174 through the connecting shaft 122 is also moved in the vertical direction along a curve rather than a straight line. Therefore, when the vertical movement of the connecting bar 174 is switched to the rotational movement of the latch 120, interference due to the position change of the latch 120 occurs.

In the present invention, in order to prevent such interference, the guide groove 124 is formed in the latch 120 in the region between the latch pin 132 and the connecting shaft 122 (see FIGS. 6A and 6B). In addition, the pair of auxiliary box 110 is provided on each plate 112, one end of the guide rotation shaft 114 is rotatably installed, the other end of the guide rotation shaft 114 extending a predetermined distance from the center of rotation guide bar ( 134 is coupled, the guide bar 134 is inserted into the guide groove 124 of the latch 120.

The guide groove 124 of the latch 120 is formed to have a predetermined length along the longitudinal direction of the latch 120. At this time, the width of the guide groove 124 is slightly larger than the diameter of the guide bar 134 so that when the guide bar 134 rotates in the longitudinal direction of the guide groove 124 (that is, the latch ( 120) along the length direction).

Since one end of the latch 120 (the end to which the connecting shaft 174 is connected) moves along a curve, interference due to the position difference of the latch 120 when the latch 120 rotates about the latch pin 132 is performed. This happens. According to the present invention, when the latch 120 rotates, the guide bar 134 moves along the longitudinal direction of the guide groove 124 to correct the position of the latch 120, thereby preventing interference due to the position difference. .

When the latch 120 rotates, the guide bar 134 inserted into the guide groove 124 also rotates. At this time, the guide bar 134 rotates along the circumference set around the guide rotation shaft 114, the guide groove 124 into which the guide bar 134 is inserted rotates around the latch pin 132. When the latch 120 and the guide rotation shaft 114 is rotated, the guide bar 134 moves along the guide groove 124 to prevent interference due to the position change of the latch 120.

As the latch 120 rotates, the display panel 152a of the display unit 152 connected to the other end of the latch 120 is moved upward and downward through the coupling pin 125. As shown in FIG. 7, the surface of the display panel 152a has a state identifier indicating a conductive state (eg, “O”) and a blocking state (eg, “I”) of the breaker 100, respectively. Is displayed. As the latch 120 rotates, the display panel 152a moves up and down to change the position of the region where the conduction and blocking are displayed.

For example, when the display panel 152a of the display unit 152 moves upward as shown in FIG. 5A, the display panel 152a indicates a blocking state through the display area 152b of the display unit 152 as shown in FIG. 8B. The state identifier "I" may be exposed to inform the worker that the breaker 100 is in the current interruption state. In addition, when the display panel 152a of the display unit 152 moves downward as shown in FIG. 5B, a state identifier “O” indicating a conduction state is exposed through the display area 152b of the display unit 152 to expose the circuit breaker 100. Can inform the operator that is in the state of current conduction.

9 and 10 are views showing the operation of the counter according to the operation of the circuit breaker according to the present invention. 11 is a view showing a counting result displayed on the counter according to the operation of the circuit breaker according to the present invention.

When the latch 120 is moved downward as shown in FIG. 5A, the first counter bar 126 connected to one end of the latch 120 is moved upward as shown in FIG. 9. Accordingly, one end of the second counter bar 128 connected to the first counter bar 126 moves upward. Accordingly, the counter 128a disposed at the other end of the second counter bar 128 contacts the inner surface of the case to perform a counting operation. In this case, since the fixed contactor 160 and the movable contactor 170 are separated as shown in FIG. 5A, the counter 128a counts the number of times of separation of the fixed contactor 160 and the movable contactor 170.

Next, when the latch 120 is moved upward as shown in FIG. 5B, the first counter bar 126 connected to one end of the latch 120 is moved downward as shown in FIG. 10. . Accordingly, one end of the second counter bar 128 connected to the first counter bar 126 moves downward. Accordingly, the counter 128a disposed at the other end of the second counter bar 128 contacts the inner surface of the case to perform a counting operation. In this case, since the fixed contactor 160 and the movable contactor 170 are in contact with each other as shown in FIG. 5B, the counter 128a counts the number of times of contact between the fixed contactor 160 and the movable contactor 170.

By the above operation, the number of driving of the breaker counted by the counter 128a, that is, the number of times of disconnection or contact of the fixed contactor 160 and the movable contactor 170 is displayed externally by the counter 154 as shown in FIG. . In this case, the counter 154 may display the counted result in various ways. For example, the counter 154 may be displayed with a number of times of contact between the fixed contactor 160 and the movable contactor 170, or a number of times of contact between the fixed contactor 160 and the movable contactor 170. Each time the contact number reaches a predetermined reference number (eg, five times), the driving frequency may be displayed by displaying different colors. According to an exemplary embodiment, the counter value may be set to increase by one when the fixed contact 160 and the movable contact 170 are separated and contacted once.

The present invention as described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by.

Claims (7)

A fixed contactor and a movable contactor which are in contact with and separated from each other to conduct and interrupt current;
A first movable member having the movable contact formed on one side;
A second mover connected to the first mover and configured to rotate about a drive shaft;
A latch whose one end is connected to the second mover and which rotates in accordance with the rotational movement of the second mover;
A display unit connected to the other end of the latch and indicating whether the fixed contactor and the movable contactor are in contact with each other according to a rotational movement of the latch; And
A counter connected to the other end of the latch and counting at least one of a contact number and a disconnection time of the fixed contact and the movable contact according to a rotational movement of the latch;
breaker.
The method of claim 1,
A connection bar having one end connected to the first mover and the other end connected to one end of the latch; And
And a latch pin rotatably penetrating the latch to become a center point of the rotational movement of the latch during the rotational movement of the second mover.
breaker.
The method of claim 2,
A first coupling pin having one end connected to the other end of the latch;
A first counter bar having one end connected to the other end of the first coupling pin and moving up and down according to a rotational movement of the latch; And
A second counter bar having one end connected to the other end of the first counter bar through a second coupling pin and the other end connected to the counter and operating the counter according to the vertical movement of the first counter bar;
breaker.
The method of claim 3,
The display unit is connected to the other end of the latch and includes a display panel which moves in the vertical direction as the latch rotates.
breaker.
The method of claim 3,
A guide groove formed in the latch;
Auxiliary boxes disposed on both sides of the latch;
A plate formed in the auxiliary box;
A guide rotation shaft rotatably coupled to the plate; And
One end is further coupled to the guide rotation shaft and the other end further comprises a guide bar inserted into the guide groove
breaker.
The method of claim 5,
The guide groove is formed along the longitudinal direction of the latch to move the guide bar along the guide groove as the latch rotates
breaker.
The method of claim 1,
And driving means for rotating the second mover by driving according to a state of a transmission transformer system or an electric circuit connected to the breaker.
breaker.

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