KR102908201B1 - Overhead line protection device equipped with an inspection-window-type disconnector - Google Patents

Abstract

The present invention relates to an overhead line protection device having an inspection window-type disconnector for transmitting or blocking high-voltage power applied from a power source side to a load side, the device comprising: a power source-side connection conductor electrically connected to an external high-voltage power source; a power source-side voltage distribution element electrically connected to the power source-side connection conductor and distributing high voltage in a high-voltage state; a blocking unit connected to the power source-side voltage distribution element and performing a circuit blocking function in a high-voltage state; a first insulating operating rod for opening and closing a contact of the blocking unit; a first electronic actuator for driving the first insulating operating rod; a pressure spring providing elastic force to the first insulating operating rod; a disconnector arranged in series with the disconnector and opening a circuit to form an insulating state, and having a status display device for displaying an open state or a closed state; a second insulating operating rod for opening and closing a contact of the disconnector; a second electronic actuator for driving the second insulating operating rod; a load-side connection conductor electrically connected to the disconnector and extending to a load side; a current sensor installed on the load-side connection conductor for detecting current; And, an overhead line protection device is provided having an inspection window-type disconnector including a load-side voltage distribution element installed on the load-side connecting conductor and detecting voltage distribution.

Description

Overhead line protection device equipped with an inspection-window-type disconnector

The present invention relates to an overhead line protection device equipped with an inspection window-type disconnector. More specifically, the present invention relates to an overhead line protection device equipped with an inspection window-type disconnector, which achieves stable interruption and insulation of a high-voltage circuit and is configured to clearly display open and closed states externally, thereby simultaneously improving operational safety and maintenance efficiency.

A recloser is a device that quickly recovers from temporary faults in distribution lines. It detects a fault for a certain period of time, then blocks the circuit and attempts to re-establish the fault after a certain period of time.

In particular, in forested areas, rural areas, or sections vulnerable to external environmental changes, momentary failures due to temporary lightning strikes, falling branches, etc. frequently occur, so reclosers are essential equipment for ensuring the reliability of power distribution networks.

Reclosers require periodic maintenance and inspection. To perform these tasks safely, a structure that allows operators to visually check the circuit's interruption status is essential. However, conventional reclosers currently in widespread use have the following structural limitations in terms of ensuring operator safety and intuitive status confirmation.

Conventional reclosers lack a disconnector, and their internally located interrupting elements, such as vacuum interrupters (VIs), make it impossible to visually confirm the circuit's interruption status during maintenance. Instead, interruption must be estimated solely through indirect indicators. This structure makes it difficult to accurately identify malfunctions, defects, or damage to the interrupting elements or internal actuators from the outside. Therefore, relying solely on indicators for maintenance can lead to serious safety hazards, such as electric shock. Furthermore, problems with the insulation between the interrupting elements' contact points can lead to leakage current, accelerating equipment deterioration and potentially exposing workers to electric shock.

Furthermore, as an improvement over conventional reclosers, a structure with an external disconnector switch (DS) was added to resolve the uncertainty of the internal blocking state that occurs in conventional reclosers, thereby assisting with circuit insulation. However, even in this case, structural limitations still exist. If the disconnector malfunctions and fails to open while the power-side conductor is extended to the outside, the power-side remains energized, exposing the operator to high voltage, and the risk of electric shock still exists.

Accordingly, there is a steadily increasing demand for new technologies that can fundamentally resolve the structural problems of reclosers and ensure worker safety.

Therefore, considering the limitations of conventional technology and on-site safety issues, there is an urgent need for the development of an inspection window-type overhead line protection device that can intuitively check the blocking and insulation status of high-voltage circuits with the naked eye from the outside and can operate stably even in a high-insulation environment for a long period of time.

Korean Patent Publication No. 10-1430925 (Insulating Bushing for Recloser)

Accordingly, the present invention has been devised to solve the above-described problems, and it is configured such that the contact state inside the breaker can be directly visually confirmed from the outside, and the disconnector is stably embedded inside so that reliable insulation is possible without a separate external insulation structure. However, to date, there has been no case of a structure equipped with both a built-in disconnector and an inspection window in a recloser, and this inspection window-type disconnector is the first structure proposed through the present invention.

In other words, it is designed to eliminate factors that threaten worker safety during recloser maintenance and inspection, and to provide a more intuitive and reliable means of status confirmation. Specifically,

(1) By building the circuit breaker inside the main body, a structure capable of blocking and insulating without a separate external structure is realized.

(2) An inspection window is formed so that the contact’s closing or opening status can be directly checked visually from the outside.

(3) By applying colored indicators to more clearly identify the status of the contacts confirmed through the inspection window,

The objective is to provide an overhead line protection device having an inspection window-type disconnector that can visually identify the closing and opening status of contacts even from a distance.

An overhead line protection device having an inspection window-type disconnector according to one embodiment of the present invention is an overhead line protection device having an inspection window-type disconnector for transmitting or blocking high-voltage power applied from a power source side to a load side, the device comprising: a power source-side connection conductor electrically connected to an external high-voltage power source; a power source-side voltage distribution element electrically connected to the power source-side connection conductor and distributing high voltage in a high-voltage state; a blocking unit connected to the power source-side voltage distribution element and performing a circuit blocking function in a high-voltage state; a second insulating operating rod for opening and closing a contact of the blocking unit; a second electronic actuator for driving the second insulating operating rod; a pressure spring providing elastic force to the second insulating operating rod; a disconnector arranged in series with the disconnector and opening a circuit to form an insulating state, and having a status display device for displaying an open state or a closed state; a first insulating operating rod for opening and closing a contact of the disconnector; a first electronic actuator for driving the first insulating operating rod; a load-side connection conductor electrically connected to the disconnector and extending to a load side; A current sensor installed on the load-side connecting conductor to detect current; and a load-side voltage distribution element installed on the load-side connecting conductor to detect voltage distribution.

The first electronic actuator and the second electronic actuator are each independently controlled so that the operations of the blocking unit and the disconnector are sequentially or selectively performed, and the disconnector is configured so that the insulating operation is possible only when the blocking unit is open.

The above-mentioned disconnector may include: a disconnector movable conductor connected to the power-side connecting conductor; a movable plate integrally connected to the disconnector movable conductor; a cam pin that linearly moves the movable plate; a closing spring and an opening spring that return the cam pin; a cam that rotates in conjunction with the cam pin; and a disconnector status indicator that displays the status of the disconnector movable conductor according to the rotation of the cam.

The operation of the above-mentioned disconnector is such that the movable plate is linearly moved by the linear movement of the cam pin, and the position of the status indicator indicating the open state or closed state of the disconnector is changed according to the rotation of the cam, thereby indicating the open state or closed state of the disconnector.

The above-mentioned blocking part may include an arc extinguishing chamber for extinguishing an arc occurring in an open state.

The above arc extinguishing chamber can divide and cool the arc by alternately arranging a plurality of partition walls and metal heat sinks inside the blocking section.

The first insulating operating rod and the second insulating operating rod may be formed of a material having insulating properties and mechanical strength, and may include a sealing structure that prevents moisture penetration into the interior.

The above-mentioned blocking member and the above-mentioned disconnector can each be housed inside an injection-molded insulating housing.

The above insulating housing is formed of a multilayer insulating structure including silicone resin or epoxy resin, and can block external voltage interference.

The first electronic actuator and the second electronic actuator include an electric motor or a solenoid and can operate according to an input signal from an external control system.

The above input signal can be processed by control logic that automatically determines the operating sequence of the blocking unit and the disconnector.

The above current sensor can detect a current flowing through the load-side connecting conductor, and can be linked to a fault diagnosis circuit or an external control system to determine a current abnormality or output a diagnostic signal.

The above-mentioned blocking member and the above-mentioned disconnector can be fixedly installed on a common insulating support structure.

The above insulating support structure may include a plurality of insulating pads arranged underneath to insulate from the installation ground or module frame.

The above-mentioned plurality of insulating pads can provide electrical insulation from the installation ground and at the same time alleviate vibration and shock transmitted from the outside.

The above-mentioned blocking unit and the above-mentioned disconnector can be fixedly installed on the load-side connecting conductor and the integral support frame.

The above-mentioned integrated support frame has an additional insulating coating layer formed on the surface to prevent partial discharge when high voltage is applied and to improve insulation durability during long-term use.

An overhead line protection device having an inspection window-type disconnector may further include a spring-type conductive member having a spiral metal wire structure that is installed to contact at least one of the inner conductive part of the disconnector and the outer circumference of the load-side connection conductor, the outer circumference of the movable conductor of the disconnector, and the lower outer circumference of the movable electrode disposed inside the blocking part, and transmits current by being elastically pressed in the circumferential direction when in electrical contact.

The overhead line protection device equipped with the inspection window-type disconnector of the present invention can prevent damage to the inside of the device and improve the reliability of the interruption by quickly dividing and cooling the arc generated when interrupting a high-voltage circuit by having an arc extinguishing room installed in the interrupting section alternately arranged with a plurality of partition walls and metal heat sinks.

In addition, by independently controlling the first and second electronic actuators, the insulation operation of the disconnector is performed only after the circuit breaker is completely opened, thereby ensuring the insulation reliability of the high-voltage circuit.

Since the breaker is installed with a moving conductor, cam, and status indicator interlocked, the open and closed status of the breaker can be intuitively identified from the outside, which can greatly improve the safety and efficiency of maintenance work.

In addition, the circuit breaker and disconnector are housed in an injection-molded multilayer insulating housing, which enables stable insulation performance even in the face of external voltage interference and environmental changes, and the insulating pad placed under the insulating support structure can alleviate external vibration and impact, thereby improving the long-term durability of the device.

Through this, the overhead line protection device equipped with an inspection window-type disconnector according to the present invention can be operated stably and reliably for a long period of time even in a high-voltage environment, and can provide an excellent effect of reducing installation and maintenance costs.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

FIG. 1 is a drawing showing a processing line protection device having an inspection window-type disconnector according to one embodiment of the present invention.
FIG. 2 is a drawing showing the combined state of a processing line protection device having an inspection window-type disconnector according to one embodiment of the present invention.
FIG. 3 is a drawing showing an insulating housing of a processing line protection device having an inspection window-type disconnector according to one embodiment of the present invention.
FIG. 4 is a drawing showing a blocking section of a processing line protection device having an inspection window-type disconnector according to one embodiment of the present invention.
FIG. 5 is a drawing showing a VI molded silicone coupled to a blocking section of a processing line protection device having an inspection window-type disconnector according to one embodiment of the present invention.
FIG. 6 is a drawing showing the operating state of a disconnector and a blocking unit of a processing line protection device having an inspection window-type disconnector according to one embodiment of the present invention.
FIG. 7 is a drawing showing the structure of a disconnector of a processing line protection device having an inspection window-type disconnector according to one embodiment of the present invention.
FIG. 8 and FIG. 9 are drawings showing the operation of the structure of a disconnector of a processing line protection device having an inspection window-type disconnector according to one embodiment of the present invention.
Fig. 10 is a drawing showing a current sensor and voltage distribution element of an inspection window-type disconnector according to one embodiment of the present invention.
Fig. 11 is a drawing showing a power-side voltage distribution element of an inspection window-type disconnector according to one embodiment of the present invention.

The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Accordingly, in some embodiments, well-known process steps, well-known device structures, and well-known techniques are not specifically described to avoid ambiguity in the interpretation of the present invention. Like reference numerals refer to like elements throughout the specification.

While terms such as "first," "second," and "third" may be used herein to describe various components, these components are not limited by these terms. These terms are used to distinguish one component from another. For example, without departing from the scope of the present invention, a first component could be referred to as a "second" or "third" component, and similarly, the second and third components could be referred to interchangeably.

FIG. 1 is a drawing showing an overhead line protection device having an inspection window-type disconnector according to one embodiment of the present invention, FIG. 2 is a drawing showing a coupling state of an overhead line protection device having an inspection window-type disconnector according to one embodiment of the present invention, FIG. 3 is a drawing showing an insulating housing of an overhead line protection device having an inspection window-type disconnector according to one embodiment of the present invention, FIG. 4 is a drawing showing a blocking unit of an overhead line protection device having an inspection window-type disconnector according to one embodiment of the present invention, FIG. 5 is a drawing showing VI molded silicone coupled to a blocking unit of an overhead line protection device having an inspection window-type disconnector according to one embodiment of the present invention, FIG. 6 is a drawing showing an operation state of a disconnector and a blocking unit of an overhead line protection device having an inspection window-type disconnector according to one embodiment of the present invention, FIG. 7 is a drawing showing a structure of a disconnector of an overhead line protection device having an inspection window-type disconnector according to one embodiment of the present invention, and FIGS. 8 and 9 are drawings showing a structure of a disconnector of an overhead line protection device having an inspection window-type disconnector according to one embodiment of the present invention. This is a drawing showing the operation of the structure of a disconnector of a processing line protection device, FIG. 10 is a drawing showing a current sensor and a load-side voltage distribution element of an inspection window-type disconnector according to an embodiment of the present invention, and FIG. 11 is a drawing showing a power-side voltage distribution element of an inspection window-type disconnector according to an embodiment of the present invention.

Referring to FIGS. 1 to 11, an overhead line protection device (10) equipped with an inspection window-type disconnector according to one embodiment of the present invention is a device for stably transmitting high-voltage power applied from a power source side to a load side or quickly switching a circuit to a cut-off and insulation state when a fault occurs.

To achieve this purpose, an overhead line protection device (10) equipped with an inspection window-type disconnector includes a power-side connection conductor (100), a power-side voltage distribution element (200), a blocking unit (300), a first insulating operating rod (400), a first electronic actuator (500), a pressure spring (600), a disconnector (700), a second insulating operating rod (800), a second electronic actuator (900), a load-side connection conductor (1000), a current sensor (1100), a load-side voltage distribution element (1200), an insulating housing (1300), and a conductive member (1500).

The power-side connecting conductor (100) is electrically connected to an external high-voltage power source. That is, the power-side connecting conductor (100) serves to stably supply high voltage to an overhead line protection device (10) equipped with an inspection window-type disconnector, and can be in charge of the initiation of a power flow.

And the power side connection conductor (100) provides a consistent electrical connection with the internal components of the overhead line protection device (10) equipped with an inspection window-type disconnector, thereby maintaining the integrity of the voltage application path and ensuring the stability and quality of the power supply.

That is, the high voltage supplied through the power side connection conductor (100) can be transmitted to the load side connection conductor (1000) via the blocking unit (300).

The power-side voltage distribution element (200) is electrically connected to the power-side connection conductor (100) and distributes high voltage in a high-voltage state. This power-side voltage distribution element (200) forms a uniform voltage distribution along the power-side connection conductor (100), thereby preventing local voltage stress or insulation breakdown.

In particular, it can contribute to preventing deterioration of insulation durability even during long-term operation and extending the overall lifespan of an overhead line protection device (10) equipped with an inspection window-type disconnector.

The circuit breaker (300) is connected to the power-side voltage distribution element (200) and performs a circuit breaker function in a high-voltage state. During normal operation, the circuit breaker (300) electrically connects the power-side connection conductor (100) and the load-side connection conductor (1000), and can quickly open the contact according to a blocking command in the event of a fault.

And the blocking unit (300) may include an arc extinguishing chamber. The arc extinguishing chamber is a member for extinguishing an arc that occurs when a contact is opened, and can quickly divide and cool a high-energy arc that occurs when blocking.

The arc shielding chamber is installed inside the blocking unit (300) and can be configured by alternately arranging a plurality of partition walls (not shown) and metal heat sinks (not shown).

Moreover, the partition wall can suppress voltage increase by dividing the arc into multiple short sections, and the metal heat sink can maximize the arc extinguishing performance by quickly dissipating the heat generated from the divided arc.

By the structure of the arc extinguishing chamber as described above, the blocking unit (300) can stably extinguish the arc without damaging internal components even when high voltage is blocked.

In addition, the outer surface of the blocking part (300) is wrapped with a separate silicone molding member to protect the blocking part (300) from the external environment and to enhance high-voltage insulation performance. This silicone molding member is called VI molding silicone (310), is manufactured in a cylindrical shape by molding silicone resin, and can have a structure that tightly wraps the entire blocking part (300) from the outside.

VI molded silicone (310) can be in direct contact with the surface of the blocking part (300) to suppress partial discharge that may occur when high voltage is applied and improve insulation reliability.

It also has a buffering function that prevents mechanical damage to the blocking part (300) due to external shock or vibration. Furthermore, since silicone resin has high insulation strength and excellent environmental durability, it can reliably protect the blocking part (300) even in outdoor environments or under various temperature and humidity conditions.

In particular, the VI molded silicone (310) blocks the inflow of moisture or dust through a close bond with the main body of the blocking unit (300), thereby enabling the characteristics of the vacuum circuit breaker to be maintained for a long period of time. With this structure, the recloser (10) can prevent the performance degradation of the internal blocking unit (300) even under high voltage application, and can significantly improve the insulation durability of the entire device.

The first insulating operating rod (400) opens and closes the contact of the circuit breaker (300). Furthermore, the first insulating operating rod (400) may be formed of a material having insulating properties and mechanical strength. This may be a material such as fiberglass reinforced plastic (FRP) to ensure high insulating performance even when high voltage is interrupted. However, this is merely an example, and any material having insulating properties and mechanical strength may be substituted.

In addition, a sealing structure is provided inside the first insulating operating rod (400) to prevent the penetration of moisture and contaminants, so that the insulating properties can be maintained regardless of changes in the external environment.

At this time, the sealing structure is formed on the outer surface or connection portion of the first insulating operating rod (400) and the second insulating operating rod (800), and serves to prevent moisture, dust, foreign substances, etc. from penetrating from the outside.

Specifically, a continuous coating layer of silicone resin or rubber material is formed on the outer circumference of the first insulating operating rod (400) and the second insulating operating rod (800), so as to completely surround the first insulating operating rod (400) and the second insulating operating rod (800). This coating layer stably maintains the insulating performance by blocking moisture or foreign substances from penetrating into the interior even when the first insulating operating rod (400) and the second insulating operating rod (800) are exposed to high temperature and high humidity conditions of the installation environment or to external pollutants.

In addition, a separate packing member or an O-ring-type sealing member is provided at the portion where the first insulating operating rod (400) and the second insulating operating rod (800) are connected to the electronic actuator or the blocking unit (300)/disconnector (700), to physically seal any micro-gaps that may occur at the connection portion. This packing member maintains a continuous sealing state even when the first insulating operating rod (400) and the second insulating operating rod (800) perform reciprocating or rotating motion, thereby preventing external contaminants from entering the interior regardless of the movement.

In some embodiments, a plurality of inner wall layers may be formed inside the first insulating operating rod (400) and the second insulating operating rod (800) so as to block the path for moisture penetrating from the outside to diffuse inside in multiple stages. Through such a structure, the insulation properties inside the first insulating operating rod (400) and the second insulating operating rod (800) are stably maintained over the long term even in the event of rapid changes in the external environment.

The sealing structure can be applied with a sealing plate or sealing housing installed between the first insulating operating rod (400) and the second insulating operating rod (800) and the external housing, and can additionally play a role in strengthening the airtightness between the external environment and the internal components.

Accordingly, the first insulating operating load (400) and the second insulating operating load (800) can stably maintain high-voltage insulation performance even when exposed to external moisture or polluted environments, and can prevent insulation breakdown or tracking phenomena even during long-term use.

The first electronic actuator (500) drives the first insulated operating load (400). Furthermore, the first electronic actuator (500) is configured with an electric motor or a solenoid and can drive the first insulated operating load by receiving an input signal from the control system.

Through this, the opening and closing operations of the contacts of the blocking unit (300) can be performed accurately and quickly, and stable blocking can be achieved even in a failure situation.

The operational relationship between the blocking unit (300) and the disconnector (700) may proceed in such a manner that, when a fault occurs, the blocking unit (300) is first opened under the control of the second insulating operating rod (800) and the second electronic actuator (900), and then the disconnector (700) performs an insulating operation by the first insulating operating rod (400) and the first electronic actuator (500).

This goes beyond simply disconnecting the high-voltage circuit, but also physically completely isolates it to prevent subsequent failures or residual voltage inflow. Therefore, disconnection and isolation are clearly separated, and through sequential operation, the stability of high-voltage equipment operation can be significantly improved.

The pressure spring (600) provides elastic force to the second insulating operating rod (800). The pressure spring (600) provides elastic return force to ensure that the contact of the blocking part (300) remains in a normal closing state or to allow the contact to be quickly and reliably released when opened, thereby ensuring the reliability and durability of the driving mechanism.

The disconnector (700) is arranged in series with the circuit breaker (300) and opens the circuit to form an insulating state, and is provided with a status display device (710) that indicates the open state or the closed state. In addition, the disconnector (700) is configured so that the insulating operation is possible only when the circuit breaker (300) is open.

At this time, the status display device (710) may be installed at one or more locations, either the upper or lower part of the disconnector (700). In addition, the status display device (710) may be configured so that the closing and opening status of the disconnector operating conductor (720) of the disconnector (700) can be visually confirmed from the outside.

The status display device (710) comprises a transparent cover and an internal indicator flag. The cover may be formed of a material that is resistant to external impacts and has excellent visibility. Specifically, the cover may be formed of tempered glass or transparent acrylic, and can maintain transparency without deformation even in various climatic environments.

Inside, an indicator flag that rotates or slides according to the interlocking of the disconnector operating conductor (720), the operating plate (730), the cam pin (740), the closing spring (750), the opening spring (760), the cam (770), and the disconnector status indicator (780) structure is installed, so that visual distinction can be made by exposing green in the closing state and red in the open state. With such a structure, the operator can clearly identify the operating state of the disconnector (700) from an external observation position, and the efficiency of maintenance can be improved.

Additionally, the disconnector (700) may include a disconnector operating conductor (720), a movable plate (730), a cam pin (740), an inlet spring (750), an opening spring (760), a cam (770), and a disconnector status indicator (780).

The disconnector movable conductor (720) can be connected to the power-side connection conductor (100). In addition, the disconnector movable conductor (720) is connected to a multi-contact structure arranged between the blocking-side conductor housing and the housing of the load-side connection conductor (1000). This multi-contact structure is formed in a multi-contact manner including a plurality of contact portions, and is selectively contacted or disconnected according to the movement of the disconnector movable conductor (720).

Through this, electrical connection can be reliably secured in the closed state of the disconnector (700), and when opened, all contacts can be separated simultaneously to form a complete insulation state. The multi-contact structure includes an insulating spacer to minimize interference between each contact part, and can be designed to provide stable current-carrying performance even in a high-voltage state. Next, the housing on the disconnecting part side can mean a housing including an insulating cover and a metal conductor structure formed so that the internal fixed contact of the disconnecting part (300) can be connected to the external disconnecting part movable conductor (720). This constitutes a part of the electrical connection between the disconnecting part (700) and the disconnecting part (300), and forms a current-carrying state through combination with the multi-contact structure.

The movable plate (730) is integrally connected to the movable conductor (720) of the short-circuit switch and can be linearly moved by the cam pin (740).

The cam pin (740) serves to move the movable plate (730) linearly in the horizontal direction, and the movement of the cam pin (740) can be assisted by the elastic force of the input spring (750) and the opening spring (760).

The closing spring (750) and the opening spring (760) can return the cam pin (740). The closing spring (750) and the opening spring (760) ensure a reliable return operation of the disconnector (700), and can secure stability by absorbing the repulsive force or shock that may occur when the movable plate (730) moves.

That is, the insertion spring (750) can push the movable plate (730) in the direction of the cam pin (740) to return it to the insertion position. Then, the opening spring (760) can push the movable plate (730) in the direction of the cam pin (740) to return it to the open position.

The cam (770) can be rotated in conjunction with the cam pin (740).

The disconnector status indicator (780) can visually display the open or closed status of the disconnector operating conductor (720) externally according to the rotation of the cam (770).

At this time, the operation of the disconnector (700) is such that the movable plate (730) is linearly moved by the linear movement of the cam pin (740), and the position of the disconnector status indicator (780) that indicates the open state or closed state of the disconnector (700) is changed according to the rotation of the cam (770), so that the open state or closed state of the disconnector (700) can be displayed.

The second insulating operating rod (800) opens and closes the contact of the disconnector (700). This operating rod is formed of a material having insulating properties and mechanical strength, and may include a sealing structure inside to prevent moisture penetration.

The second electronic actuator (900) drives the second insulating operating rod (800) to perform the operation of the disconnector (700), and can be controlled independently from the first electronic actuator (500).

The load-side connecting conductor (1000) is electrically connected to the disconnector (700) and extends to the load side. Power can be supplied to the load through the load-side connecting conductor (1000).

A current sensor (1100) is installed on a load-side connecting conductor (1000) to detect current. The current sensor (1100) may be formed in a ring-shaped structure surrounding the load-side connecting conductor (1000), thereby detecting current flowing through the load-side conductor in a non-contact manner. The detected current value is transmitted to a fault diagnosis circuit or an external control system, thereby enabling determination of normal operation of the circuit or prompt response in the event of a fault.

And a load-side voltage distribution element (1200) is also installed in the load-side connecting conductor (100).

The load-side voltage distribution element (1200) is a sensor that detects the distribution of load-side potential and is configured to stably detect voltage even under high voltage conditions. This allows for continuous monitoring of the voltage status of the load-side circuit and early detection of abnormal conditions such as overvoltage and undervoltage, thereby improving system reliability.

In particular, a current sensor (1100) installed in a load-side connecting conductor (1000) and a load-side voltage distribution element (1200) can be formed as an integrated structure.

A load-side voltage distribution element (1200) integrated within the same structure as the current sensor (1100) arranged in a ring shape centered on the load-side connecting conductor (1000) can efficiently collect current and voltage information simultaneously while applying a minimal load to the load-side connecting conductor (1000).

This integrated structure not only saves installation space, but can also be advantageous in increasing measurement accuracy by minimizing interference between sensors.

A power side voltage distribution element (200) can also be placed on the power side, and this is formed as a ring-shaped structure surrounding the power side connection conductor (100), thereby stably monitoring the high voltage state of the power side.

This power-side voltage distribution element (200) not only contributes to reducing the risk of insulation breakdown by uniformly distributing the potential across the entire power-side conductor when high voltage is applied, but also enables real-time monitoring of whether a power-side failure has occurred.

The current sensor (1100) and the load-side voltage distribution element (1200) installed on the power supply side and the load side, respectively, immediately detect changes in current and voltage when a fault occurs and transmit data to an external control system or fault diagnosis circuit. Through this, the recloser (10) can automate a series of control processes, such as fault determination, blocking command execution, and insulation state switching, thereby shortening the fault recovery time and increasing the reliability and stability of the entire system.

Meanwhile, the first electronic actuator (500) and the second electronic actuator (900) are each independently controlled, so that the operations of the blocking unit (300) and the disconnector (700) are performed sequentially or selectively.

In addition, the first electronic actuator (500) and the second electronic actuator (900) operate according to signals input from an external control system, and the input signals can be processed by control logic that automatically determines the operating sequence of the blocking unit (300) and the disconnector (700).

Additionally, the blocking unit (300) and the disconnector (700) can each be housed inside an injection-molded insulating housing (1300). The insulating housing (1300) is formed of a multilayer insulating structure including silicone resin or epoxy resin, and thus can maintain stable insulating performance and mechanical strength even in a high-voltage application environment.

In addition, the blocking member (300) and the disconnector (700) can be fixedly installed on a common insulating support structure, and the insulating support structure can include a plurality of insulating pads arranged underneath to be insulated from the installation ground or module frame. The plurality of insulating pads can provide electrical insulation from the installation ground while also mitigating vibrations and shocks transmitted from the outside.

In addition, the blocking unit (300) and the disconnector (700) can be fixedly installed on an integral support frame with a load-side connecting conductor (1000). In addition, the integral support frame can have an additional insulating coating layer formed on its surface to prevent partial discharge when high voltage is applied and improve insulation durability during long-term use.

In addition, according to one embodiment of the present invention, in addition to checking the open/closed state of the disconnector (700) through the inspection window, a rotary state indicator (1400) may be additionally provided so that the operating state of the blocking unit (300) or disconnector (700) can be checked more intuitively from the outside.

The rotary status indicator (1400) rotates in conjunction with the cam of the electronic actuator and is formed so that different colors are exposed to the outside depending on the blocking or inserting state.

In particular, the rotary status indicator (1400) is configured to be visually confirmed from any position in a 360-degree direction, allowing workers or maintainers to easily identify the status from various angles.

The rotary status indicator (1400) of the present invention can be applied in parallel with the inspection window type disconnector structure or installed independently to further improve the operational reliability of the recloser.

The conductive member (1500) forms a plurality of conductive paths so that high-voltage power can be safely cut off or supplied, and may be formed of a spiral metal wire structure to reliably maintain electrical connection therebetween. Next, the conductive member (1500) may be installed so as to be in contact with at least one of the following: between the internal conductive portion of the disconnector (700) and the outer circumference of the load-side connection conductor (1000), the outer circumference of the disconnector movable conductor (720), and the lower outer circumference of the movable electrode (320) disposed inside the disconnector (300).

In this way, the conductive member (1500) is installed at each electrical connection point and is configured to contact at least one member among the inner conductive part of the disconnector (700) and the outer circumference of the load-side connection conductor (1000), the outer circumference of the disconnector movable conductor (720), and the lower outer circumference of the movable electrode (320) arranged inside the blocking member (300). The contact method is not a simple metal-to-metal contact, but is structured to be elastically adhered in multiple planes in the circumferential direction.

This elastic sealing structure is a multi-contact spring structure also known as BAL SEAL, which is manufactured in a spirally wound form with metal wires, and when inserted into the outer surface of the mating component, forms a uniform pressure across the entire contact surface.

Accordingly, it is possible to ensure that current can flow stably between each component under high voltage conditions, and to prevent contact failure, spark generation, and contact deterioration due to vibration or temperature changes. In particular, the spring-type conductive member (1500) maintains its original adhesive force due to the elasticity of the metal material even when detached or repeatedly connected, thereby minimizing the deterioration of durability due to repeated opening and closing of the recloser.

In addition, the conductive member (1500) of the present embodiment is inserted into a conductive connection structure or metal sleeve placed inside an insulating housing (1300), so that it is structurally distinct from a non-conductive insulating housing and is applied only to a conductor through which current is directly passed. Therefore, a structure with excellent assemblyability is provided while clearly distinguishing between the insulating structure and the conductive structure.

Meanwhile, the term "overhead line protection device" used herein refers to a concept that includes devices installed on high-voltage power lines to control or block the flow of current. A specific example of such a device may include a recloser. A recloser has the function of automatically blocking the current and then reconnecting it after a certain period of time. In one embodiment of the present invention, the overhead line protection device may be configured to include such a recloser.

The above description is merely an example of the technical idea of the present embodiment, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential characteristics of the present embodiment. Therefore, the present embodiments are not intended to limit the technical idea of the present embodiment, but rather to explain it, and the scope of the technical idea of the present embodiment is not limited by these embodiments. The scope of protection of the present embodiment should be interpreted by the claims below, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of rights of the present embodiment.

10: Overhead line protection device with inspection window type disconnector
100: Power side connection conductor
200: Power side voltage distribution element
300: Blocking section
310: VI molding silicone
320: Movable electrode
400: 1st insulation operating load
500: First electronic actuator
600: Pressurized spring
700: Circuit breaker
710: Status display device
720: Circuit breaker operating conductor
730: Movable plate
740: Campin
750: Input spring
760: Open spring
770: Cam
780: Circuit breaker status indicator
800: Second insulation operating load
900: Second electronic actuator
1000: Load side connection conductor
1100: Current sensor
1200: Load-side voltage distribution element
1300: Insulated housing
1400: Rotating status indicator
1500: No conducting wire

Claims (10)

In an overhead line protection device having an inspection window-type disconnector for transmitting or blocking high-voltage power applied from the power source side to the load side,
Power side connecting conductor electrically connected to an external high voltage power source;
A power-side voltage distribution element electrically connected to the above power-side connecting conductor and distributing high voltage in a high-voltage state;
A circuit breaker connected to the power side voltage distribution element and performing a circuit breaker function in a high voltage state;
A second insulating operating rod for opening and closing the contact of the above-mentioned blocking part;
A second electronic actuator driving the second insulating operating load;
A pressure spring providing elasticity to the second insulating operating rod;
A disconnector arranged in series with the above-mentioned circuit breaker, opening the circuit to form an insulating state, and having a status display device that indicates the open state or the closed state;
A first insulating operating rod for opening and closing the contacts of the above-mentioned circuit breaker;
A first electronic actuator driving the first insulating operating load;
A load-side connecting conductor electrically connected to the above-mentioned disconnector and extending to the load side;
A current sensor installed on the load side connecting conductor to detect current; and
It includes a load-side voltage distribution element installed on the load-side connecting conductor to detect voltage distribution,
The above first electronic actuator and the second electronic actuator,
Each is independently controlled, and the operations of the blocking unit and the disconnector are performed sequentially or selectively.
The above circuit breaker is,
An overhead line protection device having an inspection window-type disconnector configured so that insulation operation is possible only when the above-mentioned blocking section is open.
In claim 1,
The above circuit breaker is,
A disconnector operating conductor connected to the above power side connecting conductor;
A movable plate integrally connected to the above-mentioned movable conductor;
A cam pin that linearly moves the above movable plate;
A retracting spring and an opening spring for returning the above-mentioned cam pin;
A cam that rotates in conjunction with the above cam pin; and
An overhead line protection device having an inspection window-type disconnector, including a disconnector status indicator that indicates the status of the disconnector operating conductor according to the rotation of the cam.
In claim 2,
The operation of the above circuit breaker is:
An overhead line protection device having an inspection window-type disconnector, wherein the movable plate is linearly moved by the linear movement of the cam pin, and the position of the status indicator, which indicates the open state or closed state of the disconnector, is changed according to the rotation of the cam, thereby indicating the open state or closed state of the disconnector.
In claim 1,
The above blocking part is,
Includes an arc extinguishing chamber for extinguishing arcs occurring in an open state,
The above arc arc room is,
An overhead line protection device having an inspection window-type disconnector, in which a plurality of partition walls and metal heat sinks are alternately arranged inside the above-mentioned blocking section to divide and cool the arc.
In claim 1,
The above first insulating operating load and the above second insulating operating load,
An overhead line protection device having an inspection window-type disconnector formed of a material having insulating properties and mechanical strength and including a sealing structure that prevents moisture penetration into the interior.
In claim 1,
The above blocking part and the above disconnector,
Each is housed inside an injection-molded insulating housing,
The above insulating housing,
An overhead line protection device having an inspection window-type disconnector formed of a multilayer insulating structure containing silicone resin or epoxy resin to block external voltage interference.
In claim 1,
The first electronic actuator and the second electronic actuator,
It includes an electric motor or solenoid and operates according to an input signal from an external control system,
The above input signal is,
An overhead line protection device having an inspection window-type disconnector, which is processed by a control logic that automatically determines the operating sequence of the above-mentioned blocking part and the above-mentioned disconnector.
In claim 1,
The above current sensor,
An overhead line protection device having an inspection window-type disconnector that detects current flowing through the load-side connecting conductor and determines a current abnormality or outputs a diagnostic signal in connection with a fault diagnosis circuit or an external control system.
In claim 1,
The above blocking part and the above disconnector,
Fixed and installed on a common insulating support structure,
The above insulating support structure is,
Includes a plurality of insulating pads placed underneath to insulate from the installation ground or module frame,
The above plurality of insulating pads are,
It provides electrical insulation from the installation surface and at the same time mitigates vibration and shock transmitted from the outside.
The above blocking part and the above disconnector,
It is fixedly installed on the above load side connecting conductor and the integral support frame,
The above integrated support frame,
An overhead line protection device equipped with an inspection window-type disconnector, which has an additional insulating coating layer formed on the surface to prevent partial discharge when high voltage is applied and to improve insulation durability during long-term use.
In claim 2,
An overhead line protection device having an inspection window-type disconnector, further comprising a spring-type conductive member having a spiral metal wire structure that is installed to contact at least one of the inner conductive part of the disconnector and the outer peripheral surface of the load-side connecting conductor, the outer peripheral surface of the disconnector's movable conductor, and the lower outer peripheral surface of the movable electrode disposed inside the blocking part, and transmits current by being elastically pressed in the circumferential direction when in electrical contact.