Insertion and withdrawal device and control method thereof

Abstract

The present invention relates to an insertion and withdrawal device for inserting or withdrawing a circuit breaker into or from a distributing board and a control method thereof and has advantages in that the insertion and withdrawal device measures a current of a power unit for moving and coupling a circuit breaker to determine an inserted and withdrawn state of the circuit breaker thereby, configures a current of the power unit measured during movement of the circuit breaker as a reference current, and determines the inserted and withdrawn state of the circuit breaker by the relative ratio of the reference current and the current current, thereby more accurately identifying the inserted and withdrawn state of the circuit breaker and more accurately controlling the insertion and withdrawal device.

Description

Withdrawal device and control method thereof

[0001] The present invention relates to a draw-out device, and more particularly, to a draw-out device that can be easily combined and separated from a distribution frame and can be combined at an accurate position.

[0002] A distribution board is a device that receives electricity from an external power source and transmits it to loads according to the system or purpose. The distribution board is connected to external power sources and loads, thereby energizing them.

[0003] To prevent potential power failures between external power sources and loads, distribution panels are typically equipped with circuit breakers. These circuit breakers are connected to the external power source and load, respectively, and are designed to interrupt abnormal currents. This prevents these power failures.

[0004] If a current interruption operation is performed, the circuit breaker may require component replacement. Furthermore, it may be necessary to remove the circuit breaker from the distribution panel for maintenance. Therefore, circuit breakers are typically detachably mounted on the distribution panel.

[0005] Meanwhile, the size of switchboards and circuit breakers tends to be proportional to their rated capacity. That is, when a larger current flows, the size of the circuit breaker to interrupt it may increase. Consequently, the size of the switchboard to which the circuit breaker is connected may also increase. Consequently, a large force is required to connect or disconnect a large circuit breaker from a switchboard.

[0006] However, in the case of traditional switchboards and circuit breakers, the process of connecting and disconnecting the circuit breakers is performed manually. This means that the process is typically performed by workers. Consequently, the accuracy and efficiency of the circuit breaker connection and disconnection process can be compromised. Furthermore, the possibility of safety accidents during the process of connecting and disconnecting heavy circuit breakers cannot be ruled out.

[0007] For this purpose, a draw-out device is used to draw in and draw out circuit breakers from the distribution board. The draw-out device is configured to draw in or draw out circuit breakers while being connected to and supported by the distribution board. For this purpose, the draw-out device is typically configured to include a first component connected to the distribution board, a second component connected to the circuit breakers, and a third component for driving the second component.

[0008] However, as the size and weight of circuit breakers increase, as described above, the size and weight of the drawer / withdrawal device may also increase to provide corresponding power. In this case, excessive force is required to attach the drawer / withdrawal device to the distribution panel, potentially reducing operational convenience.

[0009] Furthermore, as the weight of the drawer increases, the difficulty of positioning the drawer in the correct position to engage the circuit breaker may also increase. In such cases, the overall difficulty of drawing the circuit breaker into and out of the distribution panel may increase.

[0010] To solve these problems, prior art such as Korean Patent No. 10-1733705 or Korean Patent No. 10-1912449 discloses a distribution panel equipped with a vacuum circuit breaker entry / exit safety device or a high-voltage distribution panel with a remote racking system applied.

[0011] However, these conventional technologies have the problem of complicating the system because the vacuum circuit breaker is manually inserted and removed into the distribution panel, or the actuator for moving the circuit breaker is installed inside the high-voltage distribution panel.

[0012] Accordingly, the inventors of the present invention have devoted extensive research efforts to addressing the problems of these prior art technologies. After extensive efforts, they have completed the present invention, providing a drawer / withdrawal device and its control method that facilitates easy installation and removal, and facilitates the safe and secure drawer / withdrawal process of the circuit breaker.

[0013] The purpose of the present invention is to provide a pull-out device having a structure that is easy to install and remove, and a control method thereof.

[0014] In addition, the purpose is to provide a structure for easily performing insertion and withdrawal by automatically performing the circuit breaker insertion and withdrawal process, and a control method thereof.

[0015] Meanwhile, other unspecified purposes of the present invention will be additionally considered within the scope that can be easily inferred from the detailed description and effects thereof below.

[0016] The withdrawal device according to the present invention is:

[0017] A bracket unit including a bracket body detachably coupled to a distribution frame along a first direction and a guide profile coupled to the bracket body and extending along the first direction; a power bracket coupled to the guide profile so as to be movable along the first direction, a power unit detachably coupled to the bracket unit along the first direction and providing power for inserting and withdrawing a circuit breaker accommodated in the distribution frame; a sensor unit for detecting a status of the power unit; and a control unit including one or more processors and memories for controlling the power unit.

[0018] The above control unit is characterized in that it controls the power unit by determining the pull-in / pull-out status of the circuit breaker based on the status of the power unit received from the sensor unit.

[0019] The above sensor unit is a current sensor, and the control unit is characterized in that it determines the insertion / withdrawal status of the circuit breaker by the size of the current of the power unit measured by the sensor unit.

[0020] The control unit is characterized in that it determines the insertion / withdrawal state of the circuit breaker by using the current of the power unit as a reference current when the circuit breaker moves without a load by the insertion / withdrawal device, and the relative ratio of the reference current and the current of the power unit.

[0021] The above control unit is characterized in that, when the current of the power unit is less than the reference current, it determines that the movement or insertion / withdrawal of the circuit breaker is completed and the idling state is completed.

[0022] The above control unit is characterized in that, when the current of the power unit is greater than the reference current, it determines that the circuit breaker is being engaged or disengaged.

[0023] The control unit is characterized in that it measures the current of the power unit after a certain period of time has passed since the circuit breaker movement for the introduction operation has started, sets it as a reference current, and determines that the movement of the circuit breaker to the test position is completed when the current of the power unit becomes smaller than the reference current.

[0024] The control unit is characterized in that, after the circuit breaker has completed moving to the test position, it controls the power unit to start moving to the engagement position of the circuit breaker, measures the current of the power unit after a certain period of time has elapsed and resets it to a reference current, and when the current of the power unit becomes greater than the reset reference current, it determines that the circuit breaker is in engagement operation, and when the current of the power unit becomes smaller than the reference current again, it determines that the circuit breaker's engagement operation is completed and the circuit breaker's movement to the engagement position is completed.

[0025] The control unit is characterized in that it measures the current of the power unit after a certain period of time has passed since the circuit breaker movement for the withdrawal operation has started, sets it as a reference current, and determines that the movement of the circuit breaker to the test position is completed when the current of the power unit becomes smaller than the reference current.

[0026] The control unit is characterized in that, after the circuit breaker has completed moving to the test position, it controls the power unit to move the circuit breaker, measures the current of the power unit after a certain period of time has passed since the start of movement of the circuit breaker and sets it back to a reference current, and determines that the movement of the circuit breaker to the disconnection position is completed when the current of the power unit becomes less than the reset reference current.

[0027] The control unit is characterized in that when the current of the power unit becomes greater than a preset limit current, the operation of the power unit is temporarily stopped, the power unit is operated in the opposite direction, then temporarily stopped, and the power unit is operated again in the original direction, and when the current of the power unit becomes smaller than the reference current, the control unit determines that the engagement, disengagement, or movement of the circuit breaker is completed.

[0028] A method for controlling a withdrawal device according to another embodiment of the present invention,

[0029] The invention is characterized by comprising: a step of operating a power unit included in the draw-out device for the draw-in operation of a circuit breaker; a step of measuring the current of the power unit by a sensor unit and setting it as a reference current; and a step of determining that the movement of the circuit breaker to the test position is completed and the power unit is idling when the current of the power unit becomes smaller than the reference current.

[0030] The method further comprises the steps of: controlling the power unit to start moving the circuit breaker to the engagement position after the step of determining that the movement of the circuit breaker to the test position is completed and the power unit is idling; measuring the current of the power unit and resetting it to a reference current; determining that the circuit breaker is in an engagement operation when the current of the power unit becomes greater than the reference current; and determining that the engagement operation of the circuit breaker is completed and the movement of the circuit breaker to the engagement position is completed when the current of the power unit becomes smaller than the reference current again.

[0031] A method for controlling a withdrawal device according to another embodiment of the present invention is as follows:

[0032] The invention is characterized by comprising: a step of operating a power unit included in the draw-out device for a draw-out operation of the circuit breaker; a step of measuring the current of the power unit by a sensor unit and setting it as a reference current; and a step of determining that movement of the circuit breaker to the test position is completed when the current of the power unit becomes smaller than the reference current again.

[0033] After the step of determining that the movement of the circuit breaker to the test position is completed, the step of operating the power unit for movement of the circuit breaker; the step of measuring the current of the power unit and setting it back to the reference current; and the step of determining that the movement of the circuit breaker to the disconnection position is completed and the power unit is idling when the current of the power unit becomes smaller than the reference current.

[0034] According to the present invention, the installation and removal of the pull-out device are easy, so that the circuit breaker can be easily pulled out and pulled out.

[0035] In addition, there is an advantage in that the power unit of the draw-in / out device is controlled so that the draw-in and draw-out process of the circuit breaker is automatically performed.

[0036]

[0037] Meanwhile, even if the effect is not explicitly mentioned herein, it is added that the effect and its provisional effect described in the following specification expected by the technical features of the present invention are treated as described in the specification of the present invention.

[0038] FIG. 1 is a perspective view showing a drawing device and a distribution frame to which the drawing device is coupled according to a preferred embodiment of the present invention.

[0039] Figure 2 is a perspective view of a withdrawal device according to a preferred embodiment of the present invention.

[0040] FIG. 3 is a schematic block diagram of a withdrawal device according to a preferred embodiment of the present invention.

[0041] Figure 4 is a schematic flowchart of an introduction method of an introduction / withdrawal device according to another preferred embodiment of the present invention.

[0042] Figure 5 is a schematic flowchart of a withdrawal method of a withdrawal device according to another preferred embodiment of the present invention.

[0043]

[0044] ※ It is to be noted that the attached drawings are provided for reference only to help understand the technical concept of the present invention, and the scope of the rights of the present invention is not limited thereby.

[0045] Hereinafter, with reference to the drawings, the configuration of the present invention, guided by various embodiments thereof, and the effects resulting from such configurations will be examined. In describing the present invention, detailed descriptions of related, well-known functions that are obvious to those skilled in the art and that may unnecessarily obscure the gist of the present invention will be omitted.

[0046] Terms such as "first" and "second" may be used to describe various components, but the components should not be limited by these terms. These terms may only be used to distinguish one component from another. For example, without departing from the scope of the present invention, a "first component" may be referred to as a "second component," and similarly, a "second component" may also be referred to as a "first component." Furthermore, singular expressions include plural expressions unless the context clearly dictates otherwise. Terms used in the embodiments of the present invention may be interpreted as having meanings commonly known to those of ordinary skill in the art, unless otherwise defined.

[0047] Hereinafter, with reference to the drawings, the configuration of the present invention guided by various embodiments of the present invention and the effects resulting from the configuration will be examined.

[0048]

[0049] FIG. 1 is a perspective view showing a drawing device and a distribution frame to which the drawing device is coupled according to a preferred embodiment of the present invention.

[0050] Referring to FIG. 1, a state in which a lead-in / out device (1) and a distribution frame (2) according to an embodiment of the present invention are coupled is illustrated. The lead-in / out device (1) can be coupled to one side of the distribution frame (2), in the illustrated embodiment, the front side.

[0051] The draw-out device (1) penetrates through one side of the distribution frame (2) and can be coupled with a circuit breaker (not shown) housed inside the distribution frame (2). When the draw-out device (1) is coupled to and supported by the distribution frame (2), the circuit breaker (not shown) can be inserted into or withdrawn from the distribution frame (2).

[0052] The draw-out device (1) can be detachably coupled with the distribution frame (2). In addition, the draw-out device (1) can be detachably coupled with a circuit breaker (not shown) housed inside the distribution frame (2). In the illustrated embodiment, the draw-out device (1) is moved to the rear side to be coupled with the distribution frame (2) and is moved to the front side to be separated from the distribution frame (2).

[0053] In particular, the pull-out device (1) according to an embodiment of the present invention can have each component at least partially detachably coupled to one another. With the above configuration, the pull-out device (1) can have each component sequentially coupled to or detached from the distribution frame (2).

[0054] Below, the distribution frame (2) will be described first, and then the introduction / withdrawal device (1) will be described later.

[0055] The distribution frame (2) accommodates a circuit breaker (not shown). The circuit breaker (not shown) accommodated in the distribution frame (2) is electrically connected to an external power source (not shown) or load (not shown). The circuit breaker (not shown) is accommodated in the distribution frame (2) and is not exposed to the outside. Accordingly, safety accidents caused by high-voltage currents flowing through the circuit breaker (not shown) can be prevented.

[0056] The distribution frame (2) may have any shape capable of accommodating a circuit breaker (not shown). In the illustrated embodiment, the distribution frame (2) is a three-dimensional shape having a length in the front-back direction, a width in the left-right direction, and a height in the up-down direction.

[0057] The distribution frame (2) is detachably coupled to the draw-out device (1). As illustrated, the distribution frame (2) is formed to have a larger volume than the draw-out device (1), and the coupling and separation can be performed according to the movement of the draw-out device (1).

[0058]

[0059] Figure 2 is a perspective view of a withdrawal device according to a preferred embodiment of the present invention.

[0060] The draw-out device (1) according to the present invention is detachably coupled to a distribution frame (2). At this time, the draw-out device (1) can also be detachably coupled to a circuit breaker (not shown) accommodated or to be accommodated in the distribution frame (2). The draw-out device (1) can move the circuit breaker (not shown) in the direction of being accommodated in the distribution frame (2) or withdrawn from the distribution frame (2).

[0061] The input / output device (1) is electrically connected to an external power source (not shown) and a control unit (not shown). Power and control signals for the operation of the power unit (20) described later can be transmitted from the external power source (not shown) and the control unit (not shown).

[0062] The draw-out device (1) is coupled with the distribution frame (2). Specifically, some components of the draw-out device (1) are coupled with the distribution plate, and other components of the draw-out device (1) are coupled with the draw-out device coupling portion.

[0063] In the illustrated embodiment, the drawer (1) includes a bracket portion (10), a power portion (20), and a handle portion (30). At this time, the handle portion (30), the bracket portion (10), and the power portion (20) are respectively positioned from the distribution frame (2). That is, the power portion (20), the bracket portion (10), and the handle portion (30) are arranged in a direction from the front side to the rear side.

[0064] According to an embodiment of the present invention, the drawer (1) can be detachably coupled to a bracket portion (10), a power portion (20), and a handle portion (30). Accordingly, the bracket portion (10), the power portion (20), and the handle portion (30) can be coupled to the distribution frame (2) in a separated state.

[0065] Accordingly, compared to the case where the pull-out device (1) is integrally formed and coupled with the distribution frame (2), the amount of force required for coupling is reduced, thereby improving workability. Accordingly, not only can the pull-out device (1) be coupled with the distribution frame (2) with less force, but the coupling positions of the pull-out device (1) and the distribution frame (2) can be precisely aligned.

[0066] In addition, as will be described later, the pull-out device (1) according to an embodiment of the present invention can accurately and easily connect the bracket portion (10), the power portion (20), and the handle portion (30), which are configured to be separable from each other. Therefore, the assembly process of the pull-out device (1) can be easily performed, and the connection of each component can also be formed firmly.

[0067]

[0068] FIG. 3 is a schematic block diagram showing the configuration of a withdrawal device according to a preferred embodiment of the present invention.

[0069] The withdrawal device (1) according to the present invention may include a bracket portion (10), a power portion (20), a handle portion (30), and a control portion (40).

[0070] The introduction / withdrawal device (1) according to the present invention can perform introduction / withdrawal by moving a circuit breaker (not shown) by controlling a power unit (20) using a control unit (40).

[0071] The power unit (20) provides the power required to introduce a circuit breaker (not shown) into the space inside the distribution frame or to withdraw it from the space inside the distribution frame.

[0072] The power unit (20) may be provided in any form capable of moving a circuit breaker (not shown). In one embodiment, the power unit (20) may be configured to move the circuit breaker (not shown) by an electrical method such as a motor.

[0073] In the above embodiment, the power unit (20) is electrically connected to an external power source (not shown) and a control unit (40), respectively, so as to receive power and control signals required for operation. In another embodiment, the power unit (20) may be configured to move a circuit breaker (not shown) in the form of hydraulic pressure.

[0074] The power unit (20) is coupled to the bracket unit (10). The power unit (20) is coupled to the bracket unit (10) so as to be able to slide in a direction toward the distribution frame (2) (i.e., the front side) and a direction opposite to the distribution frame (2) (i.e., the rear side).

[0075] The power unit (20) is coupled to the handle unit (30). The power unit (20) is coupled to a circuit breaker (not shown) via the handle unit (30). The power applied by the power unit (20) can be transmitted to the circuit breaker (not shown) via the handle unit (30).

[0076] The sensor unit (40) includes a sensor for measuring the status of the input / output device (1).

[0077] The sensor unit (40) may be, for example, a current sensor for measuring the current of the power unit (20). Or, it may be a motor position sensor (MPS: Motor Position Sensor) for measuring the motor position of the power unit (20).

[0078] The control unit (50) can control the power unit (20) to ensure that the circuit breaker (not shown) is safely introduced into or withdrawn from the distribution frame (2).

[0079] For this purpose, the control unit (50) may include one or more processors (51) and memory (53).

[0080] The processor (51) can perform various control operations of the input / output device (1). That is, the processor (51) can perform control on various components, such as the power unit (20) included in the input / output device (1), and can execute various programs.

[0081] The processor (51) may include, for example, a hardware processor or a software process executed on the processor, but is not limited thereto.

[0082] The memory (53) stores various information necessary for the operation of the input / output device (1). The information stored in the memory (53) may include, but is not limited to, information for the control operation of the processor (51), program information related to the control method of the processor (51), etc.

[0083] For example, the memory (53) may include, but is not limited to, a hard disk type, a magnetic media type, a compact disc read only memory (CD-ROM), an optical media type, a magneto-optical media type, a multimedia card micro type, a flash memory type, a read only memory type, or a random access memory type, depending on its type. In addition, the memory (53) may include, but is not limited to, a cache, a buffer, a main memory, an auxiliary memory, or a separately provided storage system depending on its use / location.

[0084] The control unit (50) controls the power unit (20) to control the insertion and withdrawal operation of the circuit breaker.

[0085] To this end, the control unit (50) utilizes information measured by the sensor unit (40). For example, the sensor unit (40) is a current sensor and can determine the status of the power unit (20) based on the current value of the power unit (20). The sensor unit (40) may also include a position sensor to measure the position of the circuit breaker.

[0086] The control unit (50) can determine the status of the circuit breaker that is drawn in or drawn out by the draw-in / out device (1) by dividing the current of the power unit (20) into four stages.

[0087] At this time, the present invention is characterized in that the reference current is first measured, rather than based on the absolute value of the current, and the status of the power unit (20) and the circuit breaker is determined based on the relative ratio thereof.

[0088] If the current standard is an absolute value, it may not be possible to accurately determine the status because it does not reflect the deviation between the input / output devices or the current value that varies depending on the operating environment. This may lead to a problem in that the input / output device (1) cannot be accurately controlled.

[0089] First, depending on the process by which the circuit breaker is introduced into the distribution panel, the location of the circuit breaker can be divided into maintenance, separation, testing, and connection positions.

[0090] The maintenance location is where the circuit breaker is completely separated from the distribution panel for operator maintenance.

[0091] The DISCONNECT position is where the circuit breaker is aligned and partially inserted into the distribution board.

[0092] The test position is where the circuit breaker and the distribution board terminals are still separated, but the control circuit is connected to each other, so it is a position where you can check whether the circuit breaker is connected and operating.

[0093] The connection position is where the circuit breaker is fully inserted into the distribution panel and the terminals are connected. When the circuit breaker is connected at the connection position, the terminals of the circuit breaker and the connection points of the distribution panel are connected.

[0094] The process of pulling the circuit breaker out of the distribution panel is the opposite of the process above.

[0095] In this way, since the load of the power unit (20) changes depending on the position of the circuit breaker, the load is measured based on the current status to determine the position of the circuit breaker and control it.

[0096] The classification of current states according to the present invention is as follows.

[0097] A current: This is the current when the power unit (20) is idling after the circuit breaker has completed moving from the test position or has been connected or disconnected from the distribution board. The control unit (50) determines that the current of the power unit (20) is in the A current state when it is 0.7 to 0.97 times the B current below. The A current can be selected to a value between 0.7 and 0.97 times by an external switch, etc.

[0098] B Current: The current measured when the circuit breaker moves from the test position. This current is set as the reference current. Since the B current may vary depending on device-to-device variation and operating conditions, it can be determined as the B current if it is 0.85 to 1.2 times the reference current.

[0099] C Current: This is the current measured when the circuit breaker is engaged or disengaged during the insertion or withdrawal process. Since the load is greater than the B current when the circuit breaker simply moves from the test position, it is a larger value than the B current. For example, the control unit (50) can determine that the current of the power unit (20) is C current if it is 1.5 times or more the B current, which is the reference current. In addition, the upper limit can be set to 0.95 times or less the D current, which is the motor overcurrent or abnormal state current below.

[0100] D current: This is the reference current that determines an abnormal state in which the circuit breaker is not normally connected or an overcurrent state in the power unit (20). It may vary depending on the capacity of the circuit breaker, and for example, 1.9 A at 120 V can be set as the D current.

[0101] In this way, by measuring the current of the power unit (20) using the sensor unit (40) while the circuit breaker is moving and using this as the reference current (B current) to measure the A current or C current in a relative ratio, it is possible to more accurately determine the status of the draw-out device (1).

[0102] First, the control operation of the control unit (50) for the circuit breaker input operation of the input / output device (1) is as follows.

[0103] The following example is an example of a control operation of a control unit (50) for a drawer / withdrawal device (1) with a padlock.

[0104] The control unit (50) moves the circuit breaker from the disconnected position to the test position to first connect the circuit breaker to the distribution frame for introduction of the circuit breaker.

[0105] The control unit (50) measures the B current, i.e., the reference current, after a certain period of time has passed since the circuit breaker starts moving. This is to measure the reference current without noise after a certain period of time has passed since current noise may occur when the operation unit (20) just starts moving. For example, 3 seconds after the circuit breaker starts moving, the current of the power unit (20) is measured for 1 second using the sensor unit (40) and set as the reference current, the B current.

[0106] After measuring the reference current, if the circuit breaker movement is completed and the padlock is engaged, the circuit breaker will no longer move. Then, an overcurrent D current will be generated, and the control unit (50) will temporarily stop the operation of the power unit (20). After the temporary stop, the power unit (20) is rotated in the opposite direction for a certain period of time, stopped, and then rotated in the original direction for a certain period of time to check whether the movement of the circuit breaker is completed. When the power unit (20) rotates in the inlet or outlet direction, the padlock should be automatically released when the inlet or outlet is completed even if a rotational load is applied. However, if the padlock is not automatically released, the rotational load of the handle must be removed, so the power unit (20) is rotated in the opposite direction and then rotated back to the original direction. For example, if the circuit breaker movement is completed and the padlock is engaged, the power unit (20) is rotated in the opposite direction for 2 seconds, stopped, and then rotated in the original direction for 4 seconds to check whether the movement of the circuit breaker is completed.

[0107] In this way, if the A current, which is smaller than the B current, is measured for a certain period of time, for example, 2 seconds or more, after the D current is generated, the movement from the separation position to the test position is determined to be complete. If the drawer (1) has a TOC (Truck operated cell switch), a predetermined TOC signal is generated when the circuit breaker movement is completed. Therefore, the control unit (50) determines that the movement of the circuit breaker to the test position is complete when the A current is measured for a certain period of time or more and a TOC signal is generated.

[0108] If the movement of the circuit breaker to the test position, i.e., the time for changing from the B current to the D current to the A current, is less than a certain time, for example, 30 seconds, it can be judged that the movement has been completed normally, and if it exceeds 30 seconds, it can be judged that an error has occurred in the draw-out device (1) or the power unit (20).

[0109] Once the movement to the test position for circuit breaker introduction is completed, the control unit (50) controls the power unit (20) to start circuit breaker engagement.

[0110] When movement from the test position to the engagement position for circuit breaker engagement begins, the control unit (50) re-measures the reference current after a certain period of time. For example, the B current, i.e., the reference current, is re-measured for 1 second 5 seconds after the movement of the circuit breaker to the engagement position begins.

[0111] When the movement from the test position to the coupling position is completed and the coupling of the circuit breaker and the distribution board begins, an additional load is applied to the power unit (20), so the current of the power unit (20) changes from the B current (reference current) to the C current which is higher than the B current.

[0112] And when the circuit breaker is connected to the distribution board, the D current is generated and then changes to the A current. As seen above, when the D current is generated, the power unit (20) is temporarily stopped and then rotated in the opposite direction and then rotated back to the original direction.

[0113] Accordingly, when the circuit breaker changes from the B current to the C current, then to the D current, and then to the A current, the control unit (50) can stop the operation of the power unit (20) by determining that the circuit breaker has completed the movement and engagement operation from the test position to the engagement position. In the case where TOC is included, if the A current continues for a certain period of time or longer and a TOC signal is generated, the circuit breaker engagement operation can be determined to be completed.

[0114] Conversely, the control operation of the control unit (50) for the circuit breaker withdrawal operation of the withdrawal / intake device (1) is as follows.

[0115] First, the control unit (50) operates the power unit (20) to move the circuit breaker to the test position by disconnecting the circuit breaker from the distribution frame for withdrawal of the circuit breaker.

[0116] The control unit (50) measures the B current, i.e., the reference current, after a certain period of time has passed since the circuit breaker begins to disconnect. For example, the B current is measured for 1 second 25 seconds after the circuit breaker begins to disconnect. Since an inrush current occurs at the beginning of movement and a current inflection point occurs in the section where the shutter opens, the B current, which is the reference current, is measured after a certain period of time in order to measure the B current that occurs purely during movement.

[0117] After measuring the reference current, when the circuit breaker moves to the test position, the padlock is triggered to generate a D current, and the control unit (50) temporarily stops the operation of the power unit (20). After the temporary stop, the power unit (20) is rotated in the opposite direction for a certain period of time, stopped, and then rotated in the original direction for a certain period of time to confirm whether the movement of the circuit breaker is complete. For example, the power unit (20) is rotated in the opposite direction for 2 seconds, stopped, and then rotated in the original direction for 4 seconds to confirm whether the movement of the circuit breaker is complete.

[0118] As described above, if the TOC is included in the draw-out device (1), it may be confirmed that the circuit breaker has completed moving to the test position when the A current continues for more than 2 seconds after changing to A current and a TOC signal is generated.

[0119] After the circuit breaker moves to the test position, the control unit (50) operates the power unit (20) again to move it from the test position to the disconnect position.

[0120] When the circuit breaker starts to move, the current is measured for 1 second after a certain period of time, for example, 5 seconds, and the B current, i.e. the reference current, is re-established.

[0121] As previously discussed, when the D current occurs and then the A current occurs again, the movement to the disconnection position is judged to be complete. In addition, when TOC is included, it may be possible to judge that the circuit breaker movement is complete only when both TOC and A current occur.

[0122] When the circuit breaker completes moving from the test position to the disconnected position, the withdrawal operation is judged to be complete and the withdrawal operation is stopped.

[0123]

[0124] The following example is an example of a control operation of a control unit (50) for a drawer / withdrawal device (1) without a padlock.

[0125] In the absence of a padlock, unlike in the presence of a padlock, the completion of movement between positions cannot be detected. Therefore, completion of an insertion or withdrawal operation can only be detected by a change in current or a TOC switch.

[0126] Even in the case of a drawer device (1) without a padlock, the power unit (20) is controlled by using the A, B, C, and D currents as a standard for judging the operating status of the power unit (20).

[0127] In the case of a pull-in operation, when the pull-in operation starts, i.e., when the circuit breaker starts moving from the disconnected position to the engaged position for engagement, the B current is measured after a certain period of time. For example, after 14 seconds from the start of movement, the current of the power unit (20) is measured for 1 second and set to the B current, which is the reference current.

[0128] Since there is no padlock, the circuit breaker moves sequentially from the disconnected position to the test position and from the test position to the engaged position to initiate engagement with the distribution board.

[0129] During movement, the reference current, current B, is measured, and when the circuit breaker and distribution board start to connect, a load is generated, so current C is generated.

[0130] When the connection between the circuit breaker and the distribution board is completed, the C current changes to the A current. The control unit (50) determines that the circuit breaker input operation is completed after a certain period of time has passed after the A current is measured, and can stop the operation of the power unit (20).

[0131] However, if the current does not change to A within a certain period of time, the control unit (50) may determine that the input operation is not completed normally and may stop the operation of the power unit (20) and generate an error message.

[0132] In summary, after the start of the pull-in, the reference current B current is measured after a certain period of time, and when the current changes from B current to C current and then from C current back to A current, the circuit breaker moves from the disconnected position to the test position and then from the test position to the engaged position, and the pull-in operation is judged to be complete.

[0133] In the case of a withdrawal operation, the B current is measured after a certain period of time has passed since the withdrawal operation started.

[0134] The circuit breaker moves continuously from the engagement position to the test position and from the test position to the disconnection position, and when the movement to the disconnection position is completed, the power unit (20) starts idling and the A current is detected. Accordingly, when a certain period of time has passed since the change from the B current to the A current, the control unit determines that the circuit breaker withdrawal operation is completed and stops the operation of the power unit (20).

[0135] As with the pull-in operation, if the current does not change to A within a certain period of time, the control unit (50) may determine that the pull-out operation is not completed normally and may stop the operation of the power unit (20) and generate an error message.

[0136] In summary, the withdrawal operation measures the B current after a certain period of time has passed since the withdrawal operation of the circuit breaker has started, and when the B current changes to the A current and a certain period of time has passed, the withdrawal operation is judged to be completed and the operation of the power unit (20) is stopped.

[0137]

[0138] Figure 4 is a schematic flowchart of an introduction method of an introduction / withdrawal device according to another preferred embodiment of the present invention.

[0139] The introduction method according to the present invention can be performed by a control unit including one or more processors and memory.

[0140] When the pull-in operation starts (S110), the control unit measures the B current, i.e., the reference current, through the sensor unit after a certain period of time after the circuit breaker starts moving from the disconnection position to the test position (S120).

[0141] When the circuit breaker continues to move and a current smaller than the reference current, i.e., current A, is measured, it is determined that the circuit breaker has completed moving to the test position (S130).

[0142] As previously discussed, the circuit breaker is judged to have completed its movement to the test position when the B current is measured, then the D current is measured, and then the A current is measured again for a certain period of time. Furthermore, when TOC is included, the TOC signal generation and the A current measurement are performed simultaneously.

[0143] When the circuit breaker is moved from the test position to the coupling position, the circuit breaker movement starts from the test position to the coupling position (S140), and when the coupling of the circuit breaker and the distribution board is completed and the movement to the coupling position is completed, the introduction operation is determined to be completed (S150).

[0144] As seen above, after a certain period of time has passed since the circuit breaker's movement to the engagement position began, the B current (reference current) is measured, and when the circuit breaker and the distribution board begin to engage, it changes to the C current, and when the circuit breaker engagement is completed, it changes to the D current, and then changes back to the A current.

[0145]

[0146] Figure 5 is a schematic flowchart of a withdrawal method of a withdrawal device according to another preferred embodiment of the present invention.

[0147] The withdrawal method according to the present invention can also be performed by a control unit including one or more processors and memory.

[0148] When the circuit breaker withdrawal operation starts (210), the control unit measures the current of the power unit and sets it to the B current, i.e., the reference current (S220).

[0149] The control unit determines that when the current of the power unit changes from current B to current D and then to current A, the connection between the circuit breaker and the distribution board is released and the movement to the test position is completed (S230).

[0150] When the circuit breaker is disengaged, the control unit controls the power unit to start moving the circuit breaker to the disconnected position to move it out of the distribution frame, and when the circuit breaker movement starts (S240), the power unit current is measured and set back to the reference current.

[0151] When the circuit breaker movement starts and the current of the power unit changes to current D and then back to current A, it can be determined that the circuit breaker has completed moving to the disconnection position and the circuit breaker withdrawal operation has been completed (S250).

[0152]

[0153] According to the above-described pull-out device and control method of the present invention, the current of the power unit measured during movement of the circuit breaker is set as a reference current, and the pull-out status of the circuit breaker is determined by the relative ratio of the reference current and the current current, thereby enabling more accurate identification of the pull-out status of the circuit breaker and more accurate control of the pull-out device accordingly.

[0154]

[0155] The scope of protection of the present invention is not limited to the description and expression of the embodiments explicitly described above. Furthermore, it should be noted that the scope of protection of the present invention may not be limited by obvious modifications or substitutions within the technical field to which the present invention pertains.

Claims

1. A bracket body removably coupled to a distribution frame along a first direction, and a bracket part including a guide profile coupled to the bracket body and extending along the first direction; A power unit including a power bracket coupled with the guide profile so as to be movable along the first direction, and a power unit detachably coupled to the bracket portion along the first direction, and providing power for inserting and withdrawing a circuit breaker accommodated in the distribution frame; A sensor unit for detecting the status of the above power unit; and A control unit comprising one or more processors and memory and controlling the power unit; Including, but not limited to, A drawing-in / out device characterized in that the control unit controls the power unit by identifying the drawing-in / out status of the circuit breaker based on the status of the power unit received from the sensor unit.

2. In paragraph 1, The above sensor part is a current sensor, A drawing-in / out device, characterized in that the control unit determines the drawing-in / out status of the circuit breaker by the size of the current of the power unit measured by the sensor unit.

3. In paragraph 2, A draw-in / out device, characterized in that the control unit sets the current of the power unit when the circuit breaker moves without a load by the draw-in / out device as a reference current, and determines the draw-in / out status of the circuit breaker by the relative ratio of the reference current and the current of the power unit.

4. In paragraph 3, A drive-in / drive-out device characterized in that the control unit determines that the movement or drive-in / drive-out of the circuit breaker is complete and the power unit is in an idling state when the current of the power unit is less than the reference current.

5. In paragraph 3, A drive-in / drive-out device, characterized in that the control unit determines that the circuit breaker is engaged or disengaged when the current of the power unit is greater than the reference current.

6. In paragraph 3, A drive-in / drive-out device characterized in that the control unit measures the current of the power unit after a certain period of time has elapsed since the movement of the circuit breaker for the drive-in operation has begun, sets the current as a reference current, and determines that the movement of the circuit breaker to the test position is completed when the current of the power unit becomes smaller than the reference current.

7. In paragraph 6, A drawer / withdrawal device characterized in that the control unit controls the power unit to start movement of the circuit breaker to the engagement position after the circuit breaker has completed moving to the test position, measures the current of the power unit after a certain period of time has elapsed and resets it to a reference current, and determines that the circuit breaker is in an engagement operation when the current of the power unit becomes greater than the reset reference current, and determines that the circuit breaker's engagement operation is completed and the circuit breaker's movement to the engagement position is completed when the current of the power unit becomes smaller than the reference current again during the engagement operation.

8. In paragraph 3, A draw-out device characterized in that the control unit measures the current of the power unit after a certain period of time has elapsed since the movement of the circuit breaker for the draw-out operation has started and sets it as a reference current, and determines that the movement of the circuit breaker to the test position is completed when the current of the power unit becomes smaller than the reference current.

9. In paragraph 8, A drive-in / out device characterized in that the control unit controls the power unit to move the circuit breaker after the circuit breaker has completed moving to the test position, measures the current of the power unit after a certain period of time has passed since the start of movement of the circuit breaker and sets it back to the reference current, and determines that the movement of the circuit breaker to the isolation position is completed when the current of the power unit becomes less than the re-set reference current.

10. In any one of paragraphs 6 to 9, The control unit is characterized in that, when the current of the power unit exceeds a preset limit current, the operation of the power unit is temporarily stopped, the power unit is operated in the opposite direction, then temporarily stopped, and the power unit is operated in the original direction again, and when the current of the power unit becomes smaller than the reference current, it is determined that the engagement, disengagement, or movement of the circuit breaker is completed.

11. A method for controlling an input / output device performed by a control unit including one or more processors and memory: A step of operating a power unit included in the above-described introduction / withdrawal device for introduction operation of the circuit breaker; A step of measuring the current of the power unit by the sensor unit and setting it as a reference current after the movement of the circuit breaker starts; and A step for determining that the movement of the circuit breaker to the test position is completed and the power unit is idling when the current of the power unit becomes less than the reference current; A control method of a withdrawal device, characterized by including a.

12. In paragraph 11, After the step of determining that the above circuit breaker has completed moving to the test position and the above power unit is idling, A step of controlling the power unit so that movement to the engagement position of the circuit breaker begins; A step of measuring the current of the power unit and resetting it to the reference current after the movement of the circuit breaker is restarted; A step for determining that the circuit breaker is in a coupling operation when the current of the power unit becomes greater than the reset reference current; and A step for determining that the engagement operation of the circuit breaker is completed and movement of the circuit breaker to the engagement position is completed when the current of the power unit becomes smaller than the reset reference current again; A control method of a withdrawal device, characterized in that it further includes.

13. A method for controlling an input / output device performed by a control unit including one or more processors and memory: A step of operating a power unit included in the above withdrawal device for withdrawal operation of the circuit breaker; A step of measuring the current of the power unit by the sensor unit after the movement of the circuit breaker starts and setting it as a reference current; A step for determining that movement of the circuit breaker to the test position is completed when the current of the power unit becomes less than the reference current; A control method of a withdrawal device, characterized by including a.

14. In paragraph 13, After the step of determining that the movement of the above circuit breaker to the test position is complete, A step of operating the power unit to move the circuit breaker; A step of measuring the current of the power unit and setting it back to the reference current after the movement of the circuit breaker is restarted; and A step for determining that the movement of the circuit breaker to the disconnection position is completed and the power unit is idling when the current of the power unit becomes less than the reset reference current; A method for controlling a withdrawal device, characterized in that it further includes a.

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