2666results about "Switchgear arrangements" patented technology

The invention relates to a solid insulation compact type ring main unit, and relates to the technical field of ring main units, the solid insulation compact type ring main unit comprises a box body and a box door arranged on the box body, a base plate is fixedly arranged on the bottom side of the box body, and a plurality of moving wheels are fixedly arranged on the side face, away from the box body, of the base plate; a plurality of supporting rods are arranged on the base plate in the vertical direction in a sliding mode, an adjusting piece for controlling the supporting rods to move downwards and a reset piece for driving the supporting rods to move upwards to reset are arranged above the base plate, and the lower ends of the supporting rods can move downwards to be flush with the lowest positions of the moving wheels. According to the invention, when the ring main unit is installed in the box transformer substation, a user can drive the lower end parts of the supporting rods to move downwards to be flush with the lowest positions of the moving wheels through the adjusting parts; when the ring main unit needs to be moved out of the box transformer substation to be overhauled, the control rod relieves extrusion on the supporting rod, then the supporting rod is moved upwards through the reset piece, only the moving wheels abut against the ground in the box transformer substation at the moment, and the ring main unit can be moved out conveniently.

The invention relates to the technical field of power monitoring, in particular to a moisture-proof environment-friendly ring main unit online monitoring system with continuous fault indication and a ring main unit, and the system comprises an electric parameter dynamic analysis module, an environment collaborative verification module, a closed-loop control execution module and a behavior path optimization module. According to the method, the current fluctuation and the power difference value are matched through dynamic time warping, the temperature rise rate and the condensation index are calculated through linear regression, multi-dimensional verification is formed through fuzzy logic judgment, operation parameters are adjusted in real time through PID control, strategy weight is optimized through a genetic algorithm, feature extraction is reversely corrected, and the fault recognition precision and the response speed are improved; closed-loop feedback is established to continuously optimize the system state, environment and electrical parameter coupling analysis is enhanced, the misjudgment probability of a single threshold value is reduced, parameters are dynamically corrected, the adjustment real-time performance and accuracy are improved, the adaptive capacity under the complex working condition is enhanced, a complete closed loop of collection, analysis and feedback is established, and the insulation degradation judgment reliability is improved.

The invention relates to the technical field of insulated metal-enclosed switchgear, and discloses an environment-friendly gas-insulated ring main unit, which comprises a cabinet body, the cabinet body comprises a pressure relief chamber and a primary loop insulation chamber, a heat dissipation cylinder is fixedly arranged at the bottom in the pressure relief chamber, the top of the heat dissipation cylinder is fixedly connected with a pressure relief pipe, and the pressure relief pipe is fixedly connected with the primary loop insulation chamber. A first electromagnetic valve is fixedly arranged on a pipe body of the pressure relief pipe, and an air storage mechanism is arranged in the heat dissipation cylinder. A plurality of cabinet bodies are combined to form a ring main unit group, when the temperature of one ring main unit is abnormally increased, a corresponding first electromagnetic valve is opened, a sliding plate moves under the action of air pressure in a corresponding primary loop insulation chamber to form a gas storage cavity, insulation gas loss is avoided while pressure relief is performed, and cooling is performed; and the plurality of heat dissipation cylinders can be communicated in sequence, so that the air pressure in the primary circuit insulation chamber can be further improved to achieve a closed pressure relief effect in a cabinet deformation pressure and bursting pressure interval.

The invention discloses an intelligent response method for an arc fault of a high-altitude switch cabinet, relates to the technical field of safety protection of power equipment in a high-altitude area, and aims to solve the problems that the arc time of the arc fault is prolonged, the pressure in the cabinet is sharply increased, a traditional disposable pressure relief device cannot be reset and is lack of insulation state evaluation, and the reliability is poor. The invention aims to provide a response method which combines optical signal and pressure double-criterion detection, resettable pressure relief, gas component analysis and intelligent decision so as to improve the safety and reliability of the switch cabinet.

The invention belongs to the technical field of power distribution network equipment, and relates to an interlocking device with an emergency unlocking function and an environment-friendly ring main unit, and the interlocking device comprises an isolation interlocking assembly, a circuit breaker interlocking assembly and a chamber door interlocking assembly. The isolation interlocking assembly comprises an isolation interlocking plate, and one side of the isolation interlocking plate is provided with a shielding part; the circuit breaker interlocking assembly comprises a closing interlocking group which is arranged on the isolation interlocking plate and is used for locking and unlocking a closing release in the ring main unit; the chamber door interlocking assembly comprises a chamber door interlocking piece suitable for movably unlocking a cable chamber door on the ring main unit; the chamber door interlocking piece is provided with a rod abutting part connected with the chamber door interlocking piece through a fixing bolt. The protection functions that the circuit breaker cannot be switched on first when the disconnecting switch is switched off, the grounding switch is switched on in an electrified mode after the circuit breaker is switched on, and a cable chamber door cannot be opened when the circuit breaker is switched on are achieved through interlocking. And meanwhile, under the emergency condition of interlocking failure caused by interlocking clamping stagnation or other unforeseen circumstances, the fixing bolt can be disassembled to unlock and open the cable chamber door emergently.

The invention provides a state evaluation, regulation and control method and platform for a ring main unit, and relates to the technical field of intelligent power systems, and the method comprises the steps: predicting and obtaining the SF6 gas component of a target ring main unit at a current time node based on an inspection log and an SF6 gas component record; according to the predicted SF6 gas data, the SF6 gas concentration, the air temperature in the cabinet and the air humidity in the cabinet, insulation fault probability analysis is carried out in combination with the electric power internet, and the predicted insulation fault probability is obtained; and if the predicted insulation fault probability exceeds an expected probability threshold, generating a risk early warning signal, and performing dynamic regulation and control according to a predetermined scheme. The technical problems that a traditional insulation performance evaluation method usually depends on a single physical quantity for judgment, the insulation state of equipment cannot be comprehensively known, and the accuracy and reliability of insulation performance evaluation are low can be solved, the accuracy and reliability of ring main unit insulation performance evaluation can be improved, and the reliability of ring main unit insulation performance evaluation is improved. And potential insulation fault threats can be found in time.

The invention discloses a gas-insulated switchgear gas leakage repairing method, system, equipment and medium, and relates to the field of equipment repairing. The method comprises the following steps: scanning the gas insulated switchgear to position a gas leakage part, and preprocessing the gas leakage part; determining a scheme for blending a target interpenetrating network coating material according to the characteristics of the air leakage part and the working environment, and coating the pretreated air leakage part with the blended target interpenetrating network coating material to form a target coating; curing parameters are determined according to the type and thickness of the interpenetrating network coating material and the working environment, the power of a heating source is determined through the curing parameters, the target coating is cured through the heating source based on the power of the heating source, and the curing parameters comprise curing time, temperature, humidity and air pressure; and performing air leakage detection on the cured air leakage part to evaluate the repair effect. By implementing the technical scheme provided by the invention, the air leakage problem can be effectively and durably repaired.

The invention discloses an environment-friendly outdoor ring main unit, which belongs to the technical field of ring main units, and comprises a plurality of cabinet bodies, an environment-friendly gas cabinet, a sleeving frame and a peripheral detection plugging mechanism, wherein the peripheral detection plugging mechanism comprises a screw rod, a driving motor, a sleeving block, a sleeving rectangular plate, two plugging air bags, a connecting pipe, a circulating fan and a circulating pipe, and is also provided with a top detection plugging mechanism; and one side of the circulating pipe is also provided with a supplementing assembly. Through the peripheral detection plugging mechanism, the device has the advantages that the peripheral gas leakage part of the environment-friendly gas cabinet is automatically detected in time, long-time leakage of helium in the environment-friendly gas cabinet is avoided, waste of helium resources is greatly reduced, and the environmental protection property of the outdoor ring main unit is greatly improved, so that the problem that the gas leakage part is difficult to automatically detect in time is solved; the automatic replacement of the protective gas is realized, and the problems of resource waste caused by long-time leakage of the protective gas and poor environmental protection property of the ring main unit are avoided.

The invention discloses an intelligent environment-friendly gas insulation ring main unit, and particularly relates to the technical field of gas insulation ring main units, the intelligent environment-friendly gas insulation ring main unit comprises a cabinet body and a gas box which form the gas insulation ring main unit, the gas box is installed on the back of the cabinet body, and the front surface of the gas box extends into the cabinet body. Air in the whole cabinet body can be extracted and monitored through the draught fan and the gas monitoring alarm instrument, then through the driving mechanism, the connecting assembly, the gas guide hose, the gas inlet hose, the soft magnetic patch and the gas suction hole, whether gas leakage occurs to all the portions, prone to gas leakage, of the gas tank or not can be checked one by one, and when it is determined that gas leakage occurs to a certain portion of the gas tank, the gas tank is closed. The LED lamp strip is electrically communicated with the power adapter, so that the LED lamp strip on the outer side of the current easy-to-leak part emits light, and the air leakage part of the air box is guided for a worker, so that the worker can quickly and accurately detect the air leakage part of the air box after arriving at the site at the first time, and the intelligence and the high efficiency of maintenance of the gas insulation ring main unit are improved.

The invention relates to an outdoor waterproof grid-connected box, and relates to the technical field of grid-connected boxes, the outdoor waterproof grid-connected box comprises a box body and a box door installed on the box body, two opposite vertical side surfaces of the box body are provided with a plurality of heat dissipation ports, and the inner edges of the heat dissipation ports on the box body are fixedly provided with guide covers with upward openings; a base plate is arranged below the box body, a plurality of vertical rods are fixedly arranged on the base plate, and the upper ends of the vertical rods are fixedly connected with the bottom side face of the box body; a blocking plate located above the guide cover is arranged on the inner wall of the box body in a sliding mode, a plurality of blocking holes are formed in the blocking plate, absorbent cotton is fixedly arranged on the blocking plate, connecting rods penetrating through the bottom of the box body and extending out of the box body are fixedly arranged at the two ends of the blocking plate, and a control assembly driving the connecting rods to slide up and down is arranged on the base plate. According to the invention, in a humid or rainy environment, rainwater and water vapor are effectively prevented from intruding into the box body through the heat dissipation holes by arranging the guide cover and the barrier plate (with the absorbent cotton).

The utility model provides a ring main unit. The ring main unit comprises a gas tank, a fixed frame fixed on the inner side wall of the gas tank, a circuit breaker switch and a three-position switch, wherein the circuit breaker switch and the three-position switch are positioned in the gas tank. The solid-sealed polar pole of the circuit breaker switch comprises a polar pole body, a movable end shielding seat and a static end shielding seat, the movable end shielding seat and the static end shielding seat are located at the two ends of the polar pole body, the movable end shielding seat and the static end shielding seat can wrap the two ends of the polar pole body respectively, and therefore the electrical connection position of the polar pole body is electrically isolated from the external environment; the pole body, the moving end shielding seat and the static end shielding seat are cast into a whole through insulating resin, so that the consistency of the pole is improved; the grounding shielding seat adopts an integrally formed metal piece, and can uniformly wrap a plurality of grounding contacts in a shielding space, so that the electric field distribution of the grounding contacts is optimized. According to the ring main unit, dry air can be used as insulating gas, miniaturization of the ring main unit is achieved, and the corresponding insulating performance is met.

The invention belongs to the field of ring main units, and particularly relates to a ring main unit pressure relief device and a ring main unit thereof.The ring main unit pressure relief device comprises a cabinet body and a gas treatment assembly, the gas treatment assembly comprises a first pressure relief pipeline, the first pressure relief pipeline is fixedly installed on the outer wall of the cabinet body, and one end of the first pressure relief pipeline extends into the cabinet body; the bottom of the first pressure relief pipeline fixedly communicates with a second pressure relief pipeline, the bottom of the second pressure relief pipeline fixedly communicates with a sleeve, and a second one-way valve is arranged on the inner wall of the second pressure relief pipeline; according to the ring main unit pressure relief device and the ring main unit thereof, low fluoride in SF6 gas is treated through the gas treatment assembly, the situation that the low fluoride is exhausted to the outside and threatens the health of surrounding constructors is avoided, the SF6 gas exhausted from the gas conveying pipeline circulates along the inclined face of the bottom of the extension plate, the SF6 gas can be better fused with an alkaline solution, and the safety of the ring main unit is improved. And by arranging the spoiler, SF6 gas is wrapped, and the retention time of the SF6 gas in the alkaline solution is prolonged.

The present invention discloses a high and low voltage complete switchgear, belonging to the field of switchgear. A high and low voltage complete switchgear comprises a switch cabinet, and also comprises: a ventilation channel symmetrically arranged on the side wall of the switch cabinet, a heat dissipation and dust removal component is arranged inside the ventilation channel, which is used to dissipate heat for the electrical equipment in the switch cabinet and prevent dust from entering; a flow guide mechanism arranged on the inner wall of the switch cabinet near the ventilation channel, a part of the structure of the heat dissipation and dust removal component is connected to the flow guide mechanism, and a part of the structure of the flow guide mechanism can be driven to reciprocate up and down; a cleaning mechanism arranged on the outer wall of the switch cabinet near the ventilation channel, a part of the structure of the flow guide mechanism is connected to the cleaning mechanism, and a part of the structure of the cleaning mechanism can be driven to reciprocate along the end of the ventilation channel; the present invention can overcome the problems of uneven heat dissipation and poor effect of electrical equipment inside the high and low voltage complete switchgear, untimely cleaning of the dustproof plate, and poor dehumidification effect.

A method and system are disclosed for providing electrical power from a utility electric grid to a fracturing operation, and an electrically powered fracturing system. A mobile substation includes at least two transformer units that are operatively coupled to the utility electric grid in a parallel orientation, wherein the transformer units are capable of receiving power from the utility electric grid and stepping down the power for delivery to a switchgear. An electric motor is operatively coupled to a hydraulic fracturing pump and operatively controlled by a variable frequency drive. At least one open air relay cable is operatively coupled between the switchgear and the electric motor and capable of delivering power to the electric motor.

The utility model discloses a self-dedusting device for an environment-friendly gas insulated ring main unit, which comprises a bottom plate, two springs and two automatic telescopic rods are fixedly connected to the upper surface of the bottom plate, a mounting frame is fixedly connected to the upper ends of the springs, a brush is arranged on the surface of the mounting frame, and the cleaning end of the brush is in close contact with the heat dissipation position of the insulated ring main unit. The upper end of the automatic telescopic rod and the lower surface of the mounting frame are fixedly connected with an electromagnetic block and a magnetic suction plate respectively, the electromagnetic block makes close contact with the magnetic suction plate, positioning plates are arranged on the left side and the right side of the bottom plate and make close contact with the inner wall of the insulating ring main unit, and the upper end of the front surface of each positioning plate is fixedly connected with an air blower. Lead screws are fixedly connected to the left surface and the right surface of the bottom plate, the ends, away from the bottom plate, of the lead screws make close contact with the positioning plate, and butt joint mechanisms are arranged between the lead screws and the positioning plate. Through the device, the dust removal convenience is improved, and the influence of the dust removal device on the maintenance work of the insulating ring main unit is reduced.

The invention discloses a side-mounted vacuum circuit breaker ring main unit, which relates to the technical field of ring main units, and comprises a multi-source sensing module used for collecting and converting state parameters from equipment in the ring main unit and the environment of the ring main unit; the state fusion processing module is used for configuring rules according to a set sampling period and a threshold value; the intelligent auxiliary identification module is used for establishing a mapping relation between the multi-dimensional state parameters and the potential risk factors; the digital twin modeling module is used for constructing a virtual simulation model consistent with the ring main unit; the authority control and interlocking judgment module is used for fusing the state vector, the risk index value and the operator instruction parameter according to a preset authority strategy rule; the closed-loop control module comprises a control logic unit and a simulation verification unit and is configured to respond to the state event trigger signal, call a control instruction generation mechanism and call a virtual model to perform forward deduction on a control effect; according to the invention, the stability of equipment operation and the intrinsic safety level of operation are greatly improved.

The invention discloses a compact type environment-friendly gas insulation ring main unit. A gas tank is arranged in a cabinet body, a circuit breaker switch unit is arranged at the upper part in the gas tank, an isolation switch unit is arranged at the lower part, a bus side expansion sleeve is arranged at the top, and a lower incoming and outgoing line sleeve is arranged at the bottom. A main shaft of the circuit breaker switch unit is connected with a pole through a transmission connecting lever and other parts, the main shaft is provided with an umbrella skirt insulating part, and an insulating partition plate is arranged between static contacts and integrally cast with the pole. A main shaft of the disconnecting switch unit is sleeved with a moving contact and works cooperatively with other parts through an insulating connecting piece and the like, and a bus side expansion sleeve and a lower incoming and outgoing line sleeve are provided with C-shaped protective covers. The environment-friendly gas is adopted, and the environment-friendly requirement is met; by optimizing the structure and layout of each component, the size of the ring main unit is obviously reduced, and the old network transformation requirement is met; the unique insulation design effectively improves the insulation performance, reduces the fault risk, and guarantees the safe and stable operation of a power system.

The invention discloses a primary and secondary fusion complete environment-friendly gas insulated looped network box, which comprises a box body, a load switch is arranged in the switch chamber; the gas tank is filled with environment-friendly gas; a cable chamber; a gas storage space is formed between the support and the gas tank; a leak-proof rod; a one-way valve; a closing frame; a drive spring; a mounting hole; a rebound spring; the swing rod is arranged on one side of the load switch and is used for switching off or switching on the load switch; the connecting rod is connected with the swing rod and the driving rod and used for transmission; one end of the driving rod is connected with the connecting rod; the gear is connected to the driving rod; the gear tooth rod is meshed with the gear, penetrates through the air box and is fixedly connected with the sealing plate; when air leakage occurs at multiple positions, the closing plate closes the air box, drives the grounding switch to be grounded and cuts off the load switch. The invention has the following beneficial effects: the primary and secondary fusion complete environment-friendly gas insulated looped network box can automatically detect the gas leakage position and seal the gas leakage position so as to restrain the leakage of environment-friendly gas.

The utility model relates to a cable chamber, which is positioned below a gas tank, is communicated with a pressure relief channel, and comprises two side walls and a pressure relief channel, the bottom wall is used for connecting the two side walls; a front sealing plate; the rear sealing plate is provided with a plurality of pressure relief openings; the area of each flow guide plate is larger than the opening area of the corresponding pressure relief opening, and the flow guide plates are designed to be capable of acting between a first position where the pressure relief opening of the rear sealing plate is closed and a second position where the pressure relief opening of the rear sealing plate is opened. Therefore, the problem of small release area caused by small space of the cable chamber is effectively solved. The utility model also relates to a high-voltage switch cabinet with the high-voltage switch cabinet.

The sulfur hexafluoride insulation ring main unit comprises a ring main unit power distribution platform, a ring main unit information base, a ring main unit working condition unit, a power distribution interference unit, a ring network distribution unit, a power regulation and control unit and a power distribution management unit. According to the method, power distribution stability performance analysis is carried out from two points of working characteristics and working parameters of the target ring main unit, and analysis is carried out in combination with the sulfur hexafluoride gas interference degree of the target ring main unit, so that the working stability and continuity of the target ring main unit are improved; ring network distribution working performance risk analysis is carried out on the working condition information of the target ring main unit in an information feedback mode, so that the safety and reliability of the power distribution performance of the target ring main unit are improved, and electric power adjustment demand evaluation analysis is carried out on the electric energy management data. Therefore, the load distribution scheme of the target ring main unit is adjusted according to the information feedback condition, and the reasonable distribution of power resources and the operation efficiency of a power grid are improved.

The invention discloses a longitudinal rotation indoor alternating current metal-enclosed switchgear, which comprises a cabinet body, and a contact box device, a valve device, a longitudinal rotation isolation vacuum circuit breaker and an inductance device which are arranged in the cabinet body from top to bottom, and a driving assembly respectively acts on the longitudinal rotation isolation vacuum circuit breaker and the valve device; through partial strokes of the longitudinal rotation isolation vacuum circuit breaker and the valve, namely, the longitudinal rotation isolation vacuum circuit breaker and the valve device share one driving assembly, but the time point when the valve is driven by the driving assembly is ended earlier than the longitudinal rotation isolation vacuum circuit breaker or executed later than the longitudinal rotation isolation vacuum circuit breaker. Therefore, the motion stroke of the valve is shortened, the space requirement of the valve in the cabinet body is reduced, and the miniaturization of the longitudinal rotation indoor alternating-current metal-enclosed switchgear is realized.

The present invention relates to the field of power distribution technology, and in particular to an explosion-proof and intrinsically safe permanent magnet high-voltage vacuum distribution device for mine use, which includes a chassis and an explosion-proof box body. The explosion-proof box body is fixedly connected to the top of the chassis. A dust removal box is fixedly connected inside the chassis. A condensation box is provided at the top of the dust removal box. At least one ventilation channel is connected between the dust removal box and the condensation box. A filter screen arranged in a meandering path is provided inside the dust removal box. The filter screen slidably penetrates through the ventilation channel. The filter screen is used to filter dust and debris in the air passing through the ventilation channel. A driving component for driving the filter screen to move along the meandering path and a cleaning component for cleaning the filter screen are also provided inside the dust removal box. The driving component drives the filter screen to continuously move, and a rotary brush is used to clean the moving filter screen, so as to keep the filter screen clean and unobstructed, thereby ensuring smooth air circulation and heat dissipation effect.

An underarm gang operated vacuum break switch (underarm switch) has an electrically live portion under a mounting arm, which provides advantages over the standard vacuum break switch, which have the electrically live portion above the mounting arm. Because the non-electrified mounting arm is above the electrified portion, the underarm switch is safer for perching birds and other wildlife. The nature of the underarm switch also provides other benefits including a disconnect blade that when opened creates a visual gap to ensure electrical discontinuity along with a safety locking arm tied to deactivating the underarm switch. Adding to the safety measures is a visual indicator that shows an electrician when the switch is live and safe to open the disconnect blade. Other safety measures include a shock absorber assembly and inertia slowing mass protecting electrical contacts within the vacuum break switch from failing.

The invention discloses a 17.5 kV ring main unit. The 17.5 kV ring main unit comprises an outdoor box shell and a ring main unit shell which are integrally designed. The upper end of the box body is hinged with an upper door plate, the middle part is provided with a gas box, the lower end is provided with a cable chamber and a cable withstand voltage test chamber, and the top is an instrument chamber. Load switches are arranged on the two sides of the gas tank symmetrically, and a circuit breaker switch is embedded in the middle of the gas tank and connected through a CV busbar. The load switch is provided with an arc extinguishing grid sheet, an insulating umbrella skirt and a specially-designed grounding contact, so that arc extinguishing can be effectively realized, the insulating performance is improved, and the grounding effect is optimized. The design of the transmission assembly accurately controls the motion of the moving contact. The circuit breaker switch comprises a vacuum bubble and other components, and can efficiently extinguish arc. In addition, the lower end of the load switch is provided with test and incoming and outgoing line terminals, the driving unit is provided with a program lock, and the instrument chamber is provided with a power supply and a voltage transformer. The ring main unit optimizes space utilization through integrated design, has remarkable advantages in the aspects of electrical performance, operation convenience and maintenance, is suitable for various electric power scenes, and powerfully ensures stable operation of an electric power system.

The invention relates to the technical field of switch devices, in particular to a sulfur hexafluoride insulating ring main unit with a test head, which comprises a connecting cabinet fixedly connected to a cabinet body, the connector A is fixedly connected in the connecting cabinet; the mounting plate is fixedly connected in the cabinet body; the connector B is fixedly connected to the cabinet body; the mounting frame is fixedly connected to the mounting plate; the contact A is fixedly connected to the mounting frame; the test cabinet is fixedly connected to the cabinet body; the testing head is fixedly connected to the mounting plate; the contact B is fixedly connected to the mounting frame; the transverse frame is fixedly connected to the mounting plate; the tool apron is fixedly connected to the transverse frame; and the isolation knife is rotationally connected to the knife holder. According to the invention, the test cabinet is arranged inside, and the isolation knife is rotated to realize rapid switch-on and switch-off switching, so that the conventional test of the cable can be carried out without dismounting the cable head, the cable head does not need to be frequently plugged, the loss of related parts is reduced, and the stability of the whole power system is ensured.

The invention discloses a large-current environment-friendly ring main unit which comprises an isolating switch and a circuit breaker structure, the isolating switch is located above the circuit breaker structure, the isolating switch and the circuit breaker structure are fixedly connected, the isolating switch comprises a moving knife assembly, the moving knife assembly comprises a moving knife and a moving knife holder, the moving knife is rotationally connected with the moving knife holder, the moving knife is provided with segmented contacts, and the moving knife is connected with the circuit breaker structure. The structure of the conductive copper piece is optimized, the effective lap joint number between lap joint faces and the heat dissipation area are increased, the heat dissipation efficiency is effectively improved, and the 1250A * 1.1 temperature rise test requirement is met in dry air.

The invention provides an electric energy metering box with a protection structure, and relates to the technical field of electric energy metering boxes, the electric energy metering box comprises a metering box body, the metering box body is provided with a protection mechanism facilitating pressure relief and explosion prevention of the metering box body, and the metering box body is provided with a fire extinguishing mechanism assisting the metering box body in fire extinguishing. The protection mechanism comprises explosion venting plates and an L-shaped baffle plate, the fire extinguishing mechanism comprises a spray head cover, an L-shaped baffle plate, a relay, a fire extinguishing agent storage box and two connecting guide pipes, two pressure relief grooves are formed in the upper end of the metering box body, and the number of the explosion venting plates is two. According to the device, the pressure sensor, the relay and the fire extinguishing agent storage box are arranged and matched, after explosion occurs in the metering box body to open the explosion venting plate, pressure is applied to the pressure sensor through the explosion venting plate, so that the fire extinguishing agent storage box can be opened in time, and fire extinguishing work is conducted on the interior of the metering box body; and more serious accidents caused by fire spreading are avoided.

The invention relates to the technical field of ring main units, and provides a self-adaptive protection device for a ring main unit, which comprises a cabinet body, a gas tank mounted on the back of the cabinet body and filled with environment-friendly insulating gas, and a pressure relief pipe with one end communicated with the top of the gas tank and used for pressure relief of the gas tank, the top of the gas tank is provided with a pressure relief regulation and control assembly, and the top of the pressure relief regulation and control assembly is provided with a dustproof assembly. The pressure relief regulation and control assembly comprises a funnel-shaped main speed discharging barrel arranged at the top of the air box and a butt joint sleeve for connecting the main speed discharging barrel with the pressure relief pipe in a sealed mode. During use, the main pressure relief channel and the branch slow-heating pressure relief channels are utilized and respond to instantaneous high-pressure impact and continuous hot pressing respectively, so that deformation and damage of the gas tank caused by instantaneous arcing overpressure are effectively prevented, and the potential safety hazard that pressure accumulation caused by abnormal slow temperature rise cannot be released in time is eliminated; and self-adaptive protection of the ring main unit gas tank is realized.

The invention discloses a high-low voltage complete switch device, and belongs to the field of switch devices. A high-low voltage complete switch device comprises a switch cabinet and further comprises ventilation channels symmetrically arranged on the side wall of the switch cabinet, and heat dissipation and dust removal assemblies are arranged in the ventilation channels and used for conducting heat dissipation on electrical equipment in the switch cabinet and preventing dust from entering the switch cabinet; the diversion mechanism is arranged on one side, close to the ventilation channel, of the inner wall of the switch cabinet, and part of the heat dissipation and dust removal assembly is connected with the diversion mechanism and can drive part of the diversion mechanism to rotate up and down in a reciprocating mode; the cleaning mechanism is arranged on the side, close to the ventilation channel, of the outer wall of the switch cabinet, and part of the structure of the flow guide mechanism is connected with the cleaning mechanism and can drive part of the structure of the cleaning mechanism to rotate back and forth along the end of the ventilation channel; according to the invention, the problems of non-uniform heat dissipation, poor heat dissipation effect, untimely cleaning of the dustproof plate and poor dehumidification effect of electrical equipment in the high-low voltage switchgear assembly can be solved.

The invention relates to the technical field of power distribution switch equipment, in particular to a ring main unit. The ring main unit comprises a box body, the left side wall and the right side wall of the box body are respectively provided with a three-position switch module and a circuit breaker module which are mutually independent, the three-position switch module comprises a three-position module fixing frame and three-position switches which are installed on the three-position module fixing frame side by side in a front-back mode, and the three-position switches are direct-acting three-position switches. The isolating static contact and the grounding static contact are arranged on the upper side and the lower side respectively, the switch moving contact base and the moving contact arranged in the switch moving contact base are located between the isolating static contact and the grounding static contact, and the circuit breaker module comprises a circuit breaker module fixing frame and circuit breakers installed on the circuit breaker module fixing frame side by side front and back. And the moving contact of the circuit breaker moves up and down to open and close. The three-position switch module and the circuit breaker module can realize a bus-side three-position scheme and a line-side three-position scheme through different combination modes, the standardization of the modules is realized, and the universality is improved.