A falling arrester

Abstract

The application provides a drop-type lightning arrester, and relates to the technical field of lightning arresters. The drop-type lightning arrester comprises a lightning arrester body, a base, a tripping mechanism and a monitoring controller. The base is movably connected with the lightning arrester body, and the base is provided with a static contact. The tripping mechanism is connected with the moving contact to make the moving contact abut against the static contact. The monitoring controller is connected with the tripping mechanism. The signal acquisition device is electrically connected with the monitoring controller. The monitoring controller is used for receiving an electric signal and diagnosing the electric signal. When the diagnosis result is that the electric signal is abnormal, the monitoring controller drives the tripping mechanism to move to release the connection between the tripping mechanism and the moving contact, and the lightning arrester body falls under the action of gravity to disconnect the moving contact and the static contact. The application can monitor the state of the lightning arrester on line, actively drive the tripping mechanism to disconnect the circuit when the lightning arrester has hidden dangers, and achieve the effects of isolating faults in advance and eliminating hidden dangers.

Description

Technical Field

[0001] This application relates to the field of surge arrester technology, and more particularly to a drop-out surge arrester. Background Technology

[0002] A drop-out surge arrester is a distribution network overvoltage protection device that trips and drops out during a fault. It discharges lightning overvoltages when normally connected to the line, and disconnects from the line during a fault to achieve fault isolation.

[0003] A drop-out surge arrester consists of an arrester body, a disconnector, a moving contact, a stationary contact, an insulating base, and a support. The disconnector is connected in series with the lower end of the arrester body and grounded. The stationary contact is fixedly mounted on the insulating base, and the moving contact is assembled with the arrester body. Under normal conditions, the moving contact and the stationary contact are pressed together, connecting the arrester body to the power distribution line. The insulating base and the support complete the overall tower fixation. When the arrester varistor completely breaks down, forming a power frequency short-circuit current, the current flows through the disconnector, triggering its action. The arrester body is released from its limit and flips over, causing the moving contact to separate from the stationary contact, and the arrester is taken out of service with the line.

[0004] A drop-out surge arrester can only drop when a fault such as breakdown occurs and a short-circuit current is formed. The slow process of the surge arrester varistor getting damp or deteriorating will not cause breakdown. Drop-out surge arresters cannot detect or know in advance the dampness or deterioration of the varistor, which poses a hidden danger. Summary of the Invention

[0005] This application provides a drop-out surge arrester to solve the problem that existing drop-out surge arresters cannot detect or know in real time the moisture or deterioration of the valve plate, thus posing hidden risks.

[0006] A drop-out surge arrester, comprising:

[0007] A surge arrester body, wherein a moving contact is provided on the surge arrester body;

[0008] A base, which is connected to the surge arrester body, and a stationary contact is provided on the base;

[0009] A tripping mechanism is provided on the base and is connected to the moving contact so that the moving contact abuts against the stationary contact.

[0010] A monitoring controller, which is connected to the tripping mechanism;

[0011] A signal acquisition device is electrically connected to the monitoring controller. The signal acquisition device is used to acquire the electrical signal of the surge arrester circuit and transmit it to the monitoring controller.

[0012] The monitoring controller is used to receive the electrical signal and diagnose the electrical signal.

[0013] The monitoring controller is configured to drive the tripping mechanism to move to disconnect the tripping mechanism from the moving contact when the diagnostic result is an abnormal electrical signal, and the surge arrester body will fall under the action of gravity to disconnect the moving contact from the stationary contact.

[0014] As an optional implementation, the moving contact is provided with a first connecting member;

[0015] The tripping mechanism includes a tripping device and a second connecting member. The tripping device is disposed on the base, and the second connecting member is movably connected to the base. The tripping device is connected to the second connecting member.

[0016] When the trip unit is in the locked state, the first connector is connected to the second connector;

[0017] When the trip unit is in the tripped state, the trip unit drives the second connector to move and disconnects the second connector from the first connector.

[0018] As an optional implementation, the trip unit is an electrically controlled trip unit, which is electrically connected to the monitoring controller.

[0019] As an optional implementation, a bracket is connected to the base, and the trip unit is mounted on the bracket.

[0020] The first connector is hinged to the bracket.

[0021] A torsion spring is provided at the hinge axis between the first connector and the bracket, and the torsion spring is used to reset the tripped state of the trip device to the locked state.

[0022] As an optional implementation, the base is provided with a terminal block, which is connected to a stationary contact, and the signal acquisition device is used to acquire the electrical signal of the terminal block.

[0023] As an optional implementation, the signal acquisition device is a through-type current transformer, which is sleeved outside the terminal block.

[0024] As an optional implementation, a solar power supply mechanism is also included, with the monitoring controller connected to the solar power supply mechanism.

[0025] As an optional implementation, an elastic element is provided between the stationary contact and the base. The elastic element is used to apply a spring force to the stationary contact toward the moving contact so that the stationary contact abuts against the moving contact.

[0026] As an optional implementation, the base includes a shielding portion located on top of the base and covering the moving contact and the stationary contact.

[0027] As an optional implementation, a third connector is also included, to which both the surge arrester body and the base are connected, and the third connector is used to rotatably connect the surge arrester body and the base.

[0028] The surge arrester provided in this application embodiment comprises: an arrester body with a moving contact; a base movably connected to the arrester body with a stationary contact; a tripping mechanism mounted on the base and connected to the moving contact so that the moving contact abuts against the stationary contact; a monitoring controller connected to the tripping mechanism; a signal acquisition device electrically connected to the monitoring controller, used to acquire electrical signals of the arrester circuit and transmit them to the monitoring controller; and a monitoring controller used to receive and diagnose the electrical signals. The monitoring controller is configured to, when the diagnostic result indicates an abnormal electrical signal, drive the tripping mechanism to move to release the connection between the tripping mechanism and the moving contact, causing the arrester body to tip over under gravity, thus disconnecting the moving contact from the stationary contact.

[0029] This application embodiment can use a signal acquisition device to collect signals and use a monitoring controller to determine whether there are abnormal signals due to moisture or deterioration. When an abnormality occurs, the moving contact is disconnected from the stationary contact to directly disconnect the surge arrester circuit, realizing online monitoring of the surge arrester status. It can know the moisture and deterioration of the valve plate in real time. When the surge arrester has early deterioration or moisture and other hidden dangers, it can actively drive the tripping mechanism to disconnect the circuit without waiting for the surge arrester to completely break down and short-circuit before disconnecting the circuit. This achieves the effect of isolating faults in advance, reducing the risk of line power outage accidents, and eliminating hidden dangers. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0031] Figure 1 This is a schematic diagram of the structure of the drop-out surge arrester provided in this embodiment. Figure 1 ;

[0032] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0033] Figure 3 This is a schematic diagram of the structure of the drop-out surge arrester provided in this embodiment. Figure 2 ;

[0034] Figure 4This is a schematic diagram of the structure of the first connecting member of the drop-out surge arrester provided in this embodiment;

[0035] Figure 5 This is a schematic diagram of the static contact of the drop-out surge arrester provided in this embodiment;

[0036] Figure 6 This is a schematic diagram of the structure of the second connecting member of the drop-out surge arrester provided in this embodiment.

[0037] In the attached diagram,

[0038] 100 - Lightning arrester body;

[0039] 110 - Moving contact;

[0040] 111 - First connector;

[0041] 112-Outrigger;

[0042] 113 - Crossbar;

[0043] 114-Lock;

[0044] 200-base;

[0045] 210-Stationary contact;

[0046] 211-Contact;

[0047] 212-Trapezoidal groove;

[0048] 220-Staff;

[0049] 230 - Terminal block;

[0050] 240 - Shielding part;

[0051] 300 - Tripping mechanism;

[0052] 310 - Trip Unit;

[0053] 320 - Second connector;

[0054] 321-Carabiner;

[0055] 322 - Card slot;

[0056] 323-slope;

[0057] 400 - Monitoring Controller;

[0058] 500 - Signal Acquisition Device;

[0059] 600-torsion spring;

[0060] 700 - Solar power supply mechanism;

[0061] 800 - Elastic component;

[0062] 900 - Third connector.

[0063] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0064] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0065] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0066] A drop-out surge arrester is a distribution network overvoltage protection device that trips and drops out during a fault. It is connected in parallel with the equipment and is normally almost unpowered. During overvoltage conditions, it connects to the line to discharge lightning overvoltages. In the event of a fault, it disconnects from the line, achieving fault isolation. Specifically, when the surge arrester malfunctions and a fault occurs, the power frequency short-circuit current causes the trip unit to trip, automatically disconnecting its grounding terminal. This causes the surge arrester element to drop out of operation, preventing further escalation of the accident and facilitating timely maintenance and replacement by maintenance personnel.

[0067] A drop-out surge arrester consists of an arrester body, a disconnector, a moving contact, a stationary contact, an insulating base, and a support. The disconnector is connected in series with the lower end of the arrester body and grounded. The stationary contact is fixedly mounted on the insulating base, and the moving contact is assembled with the arrester body. Under normal conditions, the moving contact and the stationary contact are pressed together, connecting the arrester body to the power distribution line. The insulating base and the support complete the overall tower fixation. When the arrester varistor completely breaks down, forming a power frequency short-circuit current, the current flows through the disconnector, triggering its action. The arrester body is released from its limit and flips over, causing the moving contact to separate from the stationary contact, and the arrester is taken out of service with the line.

[0068] A drop-out surge arrester can only drop when a fault such as breakdown occurs and a short-circuit current is formed. The slow process of the surge arrester's varistor getting damp or deteriorating will not cause breakdown. Therefore, drop-out surge arresters cannot detect or know in advance the dampness or deterioration of the varistor, which poses a hidden risk.

[0069] In view of this, this application provides a drop-out surge arrester, comprising: a surge arrester body with a moving contact; a base movably connected to the surge arrester body with a stationary contact; a tripping mechanism mounted on the base and connected to the moving contact so that the moving contact abuts against the stationary contact; a monitoring controller connected to the tripping mechanism; a signal acquisition device electrically connected to the monitoring controller, the signal acquisition device being used to acquire electrical signals of the surge arrester circuit and transmit them to the monitoring controller; and the monitoring controller being used to receive and diagnose the electrical signals. The monitoring controller is configured to, when the diagnostic result indicates an abnormal electrical signal, drive the tripping mechanism to move to release the connection between the tripping mechanism and the moving contact, causing the surge arrester body to tip over under gravity, thus disconnecting the moving contact from the stationary contact.

[0070] This application embodiment can use a signal acquisition device to collect signals and use a monitoring controller to determine whether there are abnormal signals due to moisture or deterioration. When an abnormality occurs, the moving contact is disconnected from the stationary contact to directly disconnect the surge arrester circuit, realizing online monitoring of the surge arrester status. It can know the moisture and deterioration of the valve plate in real time. When the surge arrester has early deterioration or moisture and other hidden dangers, it can actively drive the tripping mechanism to disconnect the circuit without waiting for the surge arrester to completely break down and short-circuit before disconnecting the circuit. This achieves the effect of isolating faults in advance, reducing the risk of line power outage accidents, and eliminating hidden dangers.

[0071] The following describes an optional technical solution for a drop-out surge arrester in this embodiment, with reference to the accompanying drawings.

[0072] See Figure 1 , Figure 2 and Figure 3 A drop-out surge arrester, comprising:

[0073] The surge arrester body 100 is provided with a moving contact 110.

[0074] The base 200 is movably connected to the surge arrester body 100, and the base 200 is provided with a stationary contact 210.

[0075] The tripping mechanism 300 is mounted on the base 200 and is connected to the moving contact 110 so that the moving contact 110 abuts against the stationary contact 210.

[0076] Monitoring controller 400 is connected to tripping mechanism 300.

[0077] The signal acquisition device 500 is electrically connected to the monitoring controller 400. The signal acquisition device 500 is used to acquire the electrical signal of the surge arrester circuit and transmit it to the monitoring controller 400.

[0078] The monitoring controller 400 is used to receive electrical signals and diagnose them.

[0079] The monitoring controller 400 is configured to drive the tripping mechanism 300 to move to disconnect the tripping mechanism 300 from the moving contact 110 when the diagnostic result is an abnormal electrical signal. The surge arrester body 100 will then fall under the action of gravity to disconnect the moving contact 110 from the stationary contact 210.

[0080] The signal acquisition device 500 collects the surge arrester circuit electrical signals, including steady-state leakage current and lightning impulse current. The monitoring controller 400 separates the resistive leakage current based on the bus voltage waveform. Abnormal electrical signals include at least one of the following: steady-state leakage current exceeding limits, indicating dampness or contamination of the valve plate; resistive leakage current exceeding limits, indicating aging and deterioration of the valve plate; detection of excessive power frequency fault current, indicating valve plate breakdown and failure; multiple large lightning impulse currents occurring in a short period with increased leakage current, indicating a risk of valve plate damage. Each threshold value is pre-stored in the intelligent monitoring module of the monitoring controller 400 based on the surge arrester model and distribution network conditions. The monitored electrical signals are compared with the pre-stored threshold values ​​in the intelligent monitoring module to determine whether an abnormality exists and whether a drive signal should be output.

[0081] As the core component for realizing lightning overvoltage discharge protection in the distribution network, the surge arrester body 100 has a complete moving contact 110 structure fixedly assembled on its exterior. The moving contact 110 synchronously completes the flipping and closing actions with the surge arrester body 100 and is the conductive contact component for the surge arrester body 100 to connect to the power distribution line.

[0082] The base 200 provides an installation carrier for the whole equipment. The base 200 and the surge arrester body 100 are assembled and fitted by a rotatable connection structure. A matching stationary contact 210 is fixedly installed on the side of the base 200 facing the surge arrester body 100. The stationary contact 210 and the moving contact 110 are vertically aligned and cooperate with each other to form the main conductive circuit of the equipment.

[0083] The tripping mechanism 300 is fully assembled in the installation area of ​​the base 200. The end of the tripping mechanism 300 facing the surge arrester body 100 is connected to the moving contact 110 on the surge arrester body 100. Under normal energized operation, the tripping mechanism 300 continuously maintains the moving contact 110 and the stationary contact 210 in close contact, ensuring the continuous conduction of the conductive circuit.

[0084] The monitoring controller 400 is independently mounted on the upper part of the base 200. The monitoring controller 400 is stably electrically connected to the internal drive component of the tripping mechanism 300 through an electrical connection line, and can output drive control signals to the tripping mechanism 300.

[0085] The signal acquisition device 500 is arranged on the conductive circuit path inside the base 200. The signal acquisition device 500 forms a complete electrical connection with the monitoring controller 400 through insulated wires. The signal acquisition device 500 is connected to the main conductive circuit of the surge arrester throughout the process. It can capture and collect the electrical signals generated in the operation circuit of the surge arrester in real time, and transmit the complete electrical signals collected to the storage and processing unit inside the monitoring controller 400 through electrical lines.

[0086] When the equipment is running normally on the grid, the operator completes the closing operation. The surge arrester body 100 drives the moving contact 110 to rotate towards the base 200. The moving contact 110 and the stationary contact 210 on the base 200 are tightly fitted and abutted. The tripping mechanism 300 simultaneously completes the locking action, relying on mechanical limit to lock the moving contact 110, keeping the moving contact 110 and the stationary contact 210 in continuous contact and conduction. The operating current of the power distribution line and the lightning impulse current can flow into the surge arrester body 100 through the stationary contact 210 and the moving contact 110, and the surge arrester body 100 completes the overvoltage discharge protection.

[0087] When the equipment is energized, the signal acquisition device 500 continuously collects various electrical signals within the surge arrester's conductive circuit. All collected electrical signals, including steady-state leakage current, lightning strike current, and circuit voltage waveforms, are transmitted in real-time to the monitoring controller 400. The monitoring controller 400 continuously analyzes, separates, and compares the received electrical signals to threshold values, enabling real-time online diagnosis of fault conditions such as aging, moisture absorption, and deterioration of the surge arrester body 100's valve plates. When the monitoring controller 400 determines through algorithm calculation that the currently received circuit electrical signal exceeds the preset safety threshold and confirms that the surge arrester body 100 has an abnormal fault state such as deterioration or moisture, the monitoring controller 400 will immediately send a drive control electrical signal to the tripping mechanism 300. The electrical signal drives the internal components of the tripping mechanism 300 to move mechanically. The mechanical limit structure that originally locked the moving contact 110 of the tripping mechanism 300 is released simultaneously, and the mechanical connection between the tripping mechanism 300 and the moving contact 110 on the surge arrester body 100 is completely broken. After the tripping mechanism 300 loses its locking limit, the surge arrester body 100 flips downward under its own gravity. The moving contact 110 moves away from the stationary contact 210 on the base 200 along with the surge arrester body 100. The moving contact 110 and the stationary contact 210 are completely separated and disconnected. The conductive circuit between the surge arrester body 100 and the power distribution line is completely cut off, and the surge arrester body 100 falls off the power distribution line.

[0088] To address the shortcomings of existing drop-out surge arresters, which can only trip after a short circuit and cannot identify latent faults such as moisture-induced deterioration of the valve plates, this embodiment uses a signal acquisition device 500 linked with a monitoring controller 400 to collect circuit electrical signals in real time and diagnose the moisture-induced deterioration status of the surge arrester valve plates online. This enables online monitoring of the surge arrester's operating status, allowing maintenance personnel to grasp early potential problems in the equipment in real time.

[0089] This solution eliminates the need to wait for the surge arrester to completely break down. Upon detecting an abnormal signal, it can drive the tripping mechanism 300 to disconnect the moving and stationary contacts 210 and isolate the faulty surge arrester. This proactively eliminates hidden fault hazards, reduces the risk of line short-circuit power outages, and decreases the workload of manual on-site inspections. It is also compatible with the online monitoring requirements of smart distribution networks.

[0090] See Figure 1 and Figure 2 In some embodiments, the moving contact 110 is provided with a first connector 111;

[0091] The tripping mechanism 300 includes a trip unit 310 and a second connecting member 320. The trip unit 310 is disposed on the base 200, and the second connecting member 320 is movably connected to the base 200. The trip unit is connected to the second connecting member 320.

[0092] When the trip unit 310 is in the locked state, the first connector 111 is connected to the second connector 320.

[0093] When the trip unit 310 is in the tripped state, the trip unit 310 drives the second connector 320 to move and disconnects the second connector 320 from the first connector 111.

[0094] The surge arrester body 100 is equipped with a moving contact 110 integrally formed with a first connecting member 111. The first connecting member 111 rotates and shifts synchronously with the moving contact 110, serving as a docking structure for locking with the tripping mechanism 300. The tripping mechanism 300 consists of two parts: a trip unit 310 and a second connecting member 320. The trip unit 310 is fixedly installed on the pre-reserved assembly position on the base 200, and the second connecting member 320 is rotatably mounted on the surface of the base 200. The output actuator of the trip unit 310 is mechanically connected to the second connecting member 320, and the mechanical power output by the trip unit 310 can be directly transmitted to the second connecting member 320.

[0095] When the equipment is in the locked state for normal operation, the second connector 320 maintains a fixed limit position and engages with the first connector 111 at the moving contact 110. The engagement of these two connectors locks the moving contact 110 in place, ensuring a tight contact between the moving contact 110 and the stationary contact 210 on the base 200, thus guaranteeing stable conduction of the arrester's conductive circuit. When the monitoring controller 400 detects an abnormal electrical signal in the arrester circuit and outputs a drive command, the trip unit 310 switches to the tripping state. The internal actuator of the trip unit 310 generates mechanical displacement, pulling the second connector 320 to rotate synchronously. The engagement position of the second connector 320 shifts, completely releasing the engagement with the first connector 111. The connection between the two is completely broken, and the moving contact 110 loses its limit constraint.

[0096] The mechanical structure that achieves locking and disengagement through the cooperation of the first connector 111 and the second connector 320 transforms the driving action of the trip unit 310 into the limiting release action of the moving contact 110. The mechanical transmission path is simple and clear, the locking structure is firmly engaged, and it is not easy to loosen under normal operation. The trip unit 310 can directly drive the second connector 320 to complete the unlocking action. The action transmission is direct, which can quickly release the cooperation between the first connector 111 and the second connector 320, and release the moving contact 110 in time. This ensures that the surge arrester can quickly drop and disconnect the line when a fault occurs, and improves the response speed of fault isolation.

[0097] See Figure 4 and Figure 5 The first connecting member 111 includes a support arm 112 and a latch 114, which are integrally formed. A crossbar 113 is provided on the support arm 112. The latch 114 is used to lock with the second connecting member 320. The front end of the stationary contact 210 is provided with two contact pieces 211 with upward inclined surfaces 323, and a trapezoidal groove 212 is provided between the two contact pieces 211. The stationary contact 210 has a certain elasticity. When the moving contact 110 abuts against the stationary contact 210, the two crossbars 113 abut against the two contact pieces 211, and the protrusion in the middle of the support arm 112 is engaged in the trapezoidal groove 212 to achieve a limiting effect, so that the moving contact 110 and the stationary contact 210 can be kept in stable contact, ensuring that the stationary contact 210 and the moving contact 110 do not deviate from the contact state.

[0098] See Figure 6 The second connector 320 includes a hook 321, the end of which has a bevel 323 and the top of which has a slot 322. The slot 322 matches the latch 114, and the two are connected to realize the latching of the first connector 111 and the second connector 320. The bevel 323 allows the latch 114 of the moving contact 110 to slide better into the slot 322.

[0099] Specifically, the trip unit 310 is an electrically controlled trip unit, which is electrically connected to the monitoring controller 400.

[0100] The component responsible for unlocking drive execution in the tripping mechanism 300 is an electronically controlled trip unit. The electronically controlled trip unit is fixedly installed on the bracket 220 structure of the base 200. The electronically controlled trip unit is equipped with a dedicated electrical terminal 230, which is interconnected with the monitoring controller 400 through an insulated wire. A stable and reliable electrical connection circuit is formed between the two. Various control electrical signals issued by the monitoring controller 400 can be directly transmitted to the internal drive component of the electronically controlled trip unit.

[0101] When the surge arrester is operating normally under closed-circuit energization, the electronically controlled trip unit remains stationary and locked, continuously limiting the moving contact 110 in conjunction with the locking hook 321 structure to ensure that the moving contact 110 and the stationary contact 210 are tightly fitted and conducting. When the monitoring controller 400 determines, based on the circuit electrical signal transmitted back from the signal acquisition device 500, that the surge arrester body 100 has an abnormal fault such as valve plate dampness or deterioration, the monitoring controller 400 will immediately output a drive electrical signal. The electrical signal is directly transmitted to the electronically controlled trip unit through the connecting wire, triggering the internal actuator of the electronically controlled trip unit to generate mechanical displacement, causing the locking hook 321 to release the locking limit on the moving contact 110, completing the tripping and unlocking action, allowing the surge arrester body 100 to fall away from the power distribution line.

[0102] Compared to traditional thermal fuse and thermal explosion type trip devices, the electronically controlled trip device is directly driven by the electrical signal of the monitoring controller 400, resulting in rapid action response. It avoids the problems of thermal fuse trip devices, such as easy heat dissipation failure in low-temperature environments and failure to operate under poor working conditions with small leaks, as well as the impact noise and false operation probability of thermal explosion trip devices under large lightning currents. It can accurately trigger the trip action to address the early deterioration of the surge arrester, and has high operational stability. The electronically controlled trip device is directly electrically connected to the monitoring controller 400, and the control command transmission is lag-free. It can quickly unlock and isolate the fault when the equipment has early abnormalities, matching the complete set of control logic for online intelligent monitoring and linkage tripping of the surge arrester.

[0103] See Figure 1 and Figure 2 In some embodiments, a bracket 220 is connected to the base 200, and a trip unit 310 is disposed on the bracket 220.

[0104] The first connector 111 is hinged to the bracket 220.

[0105] A torsion spring 600 is provided at the hinge shaft between the first connector 111 and the bracket 220. The torsion spring 600 is used to reset the tripped state of the trip unit 310 to the locked state.

[0106] A bracket 220 is mounted on the base 200. The bracket 220 is an independent metal support component. The trip unit 310 is integrally mounted and fixed on the bracket 220. The bracket 220 provides positioning support for the trip unit 310, ensuring the stability of the installation position of the trip unit 310. The first connecting piece 111 of the moving contact 110 is hinged to the bracket 220 via a pin. The first connecting piece 111 can rotate freely relative to the bracket 220 around the hinge axis, thereby adapting to the position switching between braking and tripping conditions. A torsion spring 600 is fitted at the hinge shaft position where the first connector 111 is connected to the bracket 220. The two ends of the torsion spring 600 abut against the bracket 220 and the first connector 111 respectively. When the trip unit 310 drives the second connector 320 to complete the trip and unlock, the elastic restoring force stored in the torsion spring 600 can drive the first connector 111 to rotate and reset, restoring the equipment from the tripped state to the latched state that can be locked for closing, which is convenient for subsequent operation and maintenance to complete the replacement of the surge arrester and re-close and reassemble.

[0107] The bracket 220 provides an independent mounting carrier for the trip unit 310, integrating the trip unit 310 and the first connecting member 111 onto the same support component. The overall assembly structure is compact, and the alignment accuracy of each mating component is higher. The hinged structure, together with the torsion spring 600, forms an automatic reset mechanism. After each tripping action, there is no need to manually reset the locking component. It can automatically return to its position by relying on the elastic force of the torsion spring 600, simplifying the on-site reclosing operation process. At the same time, the torsion spring 600 continuously provides preload force, which can keep the first connecting member 111 and the second connecting member 320 tightly engaged after closing and locking, preventing accidental loosening during equipment operation.

[0108] See also Figure 1 and Figure 2 In some other embodiments, a terminal block 230 is provided on the base 200, the terminal block 230 is connected to the stationary contact 210, and the signal acquisition device 500 is used to acquire the electrical signal of the terminal block 230.

[0109] A space is reserved on the base 200, through which the terminal block 230 is fixedly passed and secured. The terminal block 230 specifically includes an integrally connected right end and a conductive element on the left, which are securely connected to the stationary contact 210 on the base 200 via the conductive element, forming a continuous conductive path. Line current, surge arrester leakage current, and lightning strike current all flow completely through the terminal block 230. A signal acquisition device 500 is correspondingly arranged around the terminal block 230, capable of acquiring various electrical signals flowing through the terminal block 230 in real time, thereby obtaining complete electrical data of the surge arrester's operating circuit.

[0110] By arranging the signal acquisition device 500 with corresponding terminal 230, the current signal acquisition path is short, the acquired electrical signal loss is small, and the data accuracy is high. It can completely capture key operating parameters such as steady-state leakage current and lightning impulse current of the surge arrester.

[0111] See Figure 1 Specifically, the signal acquisition device 500 is a through-type current transformer, which is sleeved outside the terminal block 230.

[0112] The signal acquisition device 500 uses a through-hole current transformer. The through-hole current transformer is completely wrapped around the outside of the terminal block 230. The terminal block 230 directly passes through the central through hole of the through-hole current transformer. All the loop current flowing through the terminal block 230 can pass through the sensing area of ​​the current transformer, thereby realizing contactless current signal acquisition.

[0113] The through-type current transformer is easy to assemble, does not require interruption of the conductive circuit, relies on electromagnetic induction to collect current, does not introduce additional contact resistance, and collects accurate data, which can provide a reliable basis for the fault diagnosis of surge arresters.

[0114] See also Figure 1 In other embodiments, a solar power supply mechanism 700 is also included, and the monitoring controller 400 is connected to the solar power supply mechanism 700.

[0115] Specifically, the solar power supply unit 700 uses photovoltaic panels, which provide power to the monitoring controller 400.

[0116] The monitoring controller 400 is electrically connected to the solar power supply mechanism 700 via a power supply wire, and the solar power supply mechanism 700 continuously supplies operating power to the monitoring controller 400. The core energy harvesting component of the solar power supply mechanism 700 is a photovoltaic panel, which can receive outdoor natural sunlight and convert light energy into electrical energy. The converted electrical energy is directly transmitted to the monitoring controller 400, ensuring that the monitoring controller 400 operates with power around the clock.

[0117] Relying on photovoltaic panels to achieve local solar energy harvesting, there is no need to lay external power supply cables, which is suitable for outdoor poles and towers without external power supply, reducing on-site wiring and construction costs; the photovoltaic panels can sustainably and autonomously supply power, ensuring that the monitoring controller 400 can collect and transmit electrical signals for a long time without frequent replacement of energy storage batteries, reducing the workload of later equipment maintenance.

[0118] See also Figure 1 In some other possible embodiments, an elastic element 800 is provided between the stationary contact 210 and the base 200. The elastic element 800 is used to apply a spring force to the stationary contact 210 toward the moving contact 110 so that the stationary contact 210 abuts against the moving contact 110.

[0119] An elastic element 800 is installed between the stationary contact 210 and the base 200 at their assembly positions. The two ends of the elastic element 800 abut against the base 200 and the stationary contact 210 respectively. Under normal conditions, an elastic thrust is continuously applied to the stationary contact 210 toward the moving contact 110, so that the stationary contact 210 always remains pressed against the moving contact 110. After closing, the stationary contact 210 can fit tightly against the surface of the moving contact 110.

[0120] The elastic element 800 continuously provides clamping force, which can eliminate the gaps generated during the processing and assembly of the moving and stationary contacts 210, ensuring the stability of the conductive contact area between the two and avoiding poor contact due to vibration and environmental deformation during operation; at the same time, it can buffer the impact when closing, maintain the continuous conduction of the conductive circuit, reduce the probability of contact resistance heating and arc erosion of the contacts, and extend the service life of the contacts.

[0121] See Figure 1 Specifically, the base 200 includes a shielding portion 240, which is located on top of the base 200 and covers the moving contact 110 and the stationary contact.

[0122] The base 200 is integrally formed with a shielding part 240, which is formed at the top of the base 200 and covers the outside of the moving contact 110 and the stationary contact 210, completely covering the conductive mating area where the moving and stationary contacts 210 are in contact with each other.

[0123] The shield 240 can isolate rain, snow, freezing rain, branches and debris from direct contact with moving and stationary contacts 210, preventing contact corrosion caused by rain and snow, freezing rain adhesion leading to tripping failure, and preventing short circuits caused by foreign objects, thus improving the stability of outdoor operation of the equipment and extending the service life of the contact structure.

[0124] See Figure 1 and Figure 3 In some embodiments, a third connector 900 is also included, to which both the surge arrester body 100 and the base 200 are connected. The third connector 900 is used to rotatably connect the surge arrester body 100 and the base 200.

[0125] The bottom of the surge arrester body 100 and the base 200 are respectively assembled and fixed with the third connecting member 900. The third connecting member 900 simultaneously supports the surge arrester body 100 and the base 200, realizing a connection structure that allows relative rotation between the two. The surge arrester body 100 can complete the closing and contacting action and the fault drop and flipping action with the third connecting member 900 as the rotation fulcrum.

[0126] The third connector 900 uniformly supports the flipping motion of the surge arrester body 100. The rotation fulcrum structure is concentrated, and the closing and tripping flipping processes are smooth and without jamming. It can stably support the self-weight of the surge arrester body 100, ensure the docking accuracy of the moving and stationary contacts 210 and the reliability of the drop action, and simplify the assembly structure between the surge arrester body 100 and the base 200.

[0127] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0128] In the description of this invention, it should be understood that the terms “comprising” and “having” as used herein, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0129] Unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can be a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A drop-out surge arrester, characterized in that, include: A surge arrester body (100) is provided with a moving contact (110). A base (200) is connected to the surge arrester body (100), and a stationary contact (210) is provided on the base (200). A tripping mechanism (300) is disposed on the base (200) and connected to the moving contact (110) so that the moving contact (110) abuts against the stationary contact (210); A monitoring controller (400) is connected to the tripping mechanism (300); A signal acquisition device (500) is electrically connected to the monitoring controller (400). The signal acquisition device (500) is used to acquire the electrical signal of the surge arrester circuit and transmit it to the monitoring controller (400). The monitoring controller (400) is used to receive the electrical signal and diagnose the electrical signal. The monitoring controller (400) is configured to drive the tripping mechanism (300) to move to release the connection between the tripping mechanism (300) and the moving contact (110) when the diagnostic result is an abnormal electrical signal, and the surge arrester body (100) falls under the action of gravity to disconnect the moving contact (110) from the stationary contact (210).

2. The surge arrester according to claim 1, characterized in that, The moving contact (110) is provided with a first connector (111); The tripping mechanism (300) includes a trip unit (310) and a second connecting member (320). The trip unit (310) is disposed on the base (200), and the second connecting member (320) is movably connected to the base (200). The trip unit (310) is connected to the second connecting member (320). When the trip unit (310) is in the locked state, the first connector (111) is connected to the second connector (320); When the trip unit (310) is in the tripped state, the trip unit (310) drives the second connector (320) to move and disconnects the second connector (320) from the first connector (111).

3. The surge arrester according to claim 2, characterized in that, The trip unit (310) is an electrically controlled trip unit (310), which is electrically connected to the monitoring controller (400).

4. The surge arrester according to claim 2, characterized in that, A bracket (220) is connected to the base (200), and the trip unit (310) is mounted on the bracket (220). The first connector (111) is hinged to the bracket (220). A torsion spring (600) is provided at the hinge axis between the first connector (111) and the bracket (220). The torsion spring (600) is used to reset the release state of the release device (310) to the locking state.

5. The surge arrester according to claim 1, characterized in that, The base (200) is provided with a terminal block (230), which is connected to a stationary contact (210). The signal acquisition device (500) is used to acquire the electrical signal of the terminal block (230).

6. The surge arrester according to claim 5, characterized in that, The signal acquisition device (500) is a through-type current transformer, which is sleeved outside the terminal block (230).

7. The surge arrester according to any one of claims 1-6, characterized in that, It also includes a solar power supply mechanism (700), to which the monitoring controller (400) is connected.

8. The surge arrester according to any one of claims 1-6, characterized in that, An elastic element (800) is provided between the stationary contact (210) and the base (200). The elastic element (800) is used to apply a spring force to the stationary contact (210) toward the moving contact (110) so that the stationary contact (210) abuts against the moving contact (110).

9. The surge arrester according to any one of claims 1-6, characterized in that, The base (200) includes a shielding portion (240) located on top of the base (200) and covering the moving contact (110) and the stationary contact (210).

10. The surge arrester according to any one of claims 1-6, characterized in that, It also includes a third connector (900), to which both the surge arrester body (100) and the base (200) are connected. The third connector (900) is used to rotatably connect the surge arrester body (100) and the base (200).

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