7726results about "Substation/switching arrangement cooling/ventilation" patented technology

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 discloses a low-voltage cable branch box with protection structures at wire inlets, and belongs to the technical field of cable branch boxes, the low-voltage cable branch box comprises a box body, the interior of the box body is fixedly connected with a mounting rack for mounting electrical appliance elements through bolts, the bottom of the box body is provided with a plurality of wire inlets distributed in a linear array, and the wire inlets are arranged in the box body. The bottom of the inner wall of the box body is fixedly connected with a fixing frame corresponding to each wire inlet, and the front and back surfaces of the fixing frame are movably provided with plugging plates in a penetrating manner. The plugging plate is arranged to plug the wire inlet, and the gap sealing mechanism is arranged to fill and seal the gap between the cable and the plugging plate, so that external humid gas cannot enter the box body from the wire inlet, and when the sealing door of the box body is in a closed state, the whole branch box can be in a totally closed state; dust or humid gas in external air is prevented from entering the branch box, and electronic components in the branch box are well protected.

The present invention relates to the technical field of control cabinets, and provides an electrical control cabinet for a thermal power plant, comprising an electrical control cabinet, wherein the electrical control cabinet is provided with a plurality of ventilation openings, a heat absorption plate is fixedly mounted on an inner wall of the electrical control cabinet, a heat dissipation structure is mounted on the heat absorption plate, four connecting bases are symmetrically and fixedly mounted on a top side of the electrical control cabinet, a ventilation structure is mounted on the four connecting bases, two mounting frames are symmetrically and fixedly mounted on the top side of the electrical control cabinet, and an anti-snow structure is mounted on the two mounting frames. According to the present invention, heat dissipation is achieved by means of a combination of heat conduction and air cooling, thereby further improving the heat dissipation effect of the electrical control cabinet. When the present invention is used in winter, if the ambient temperature is low, a fan and an electric heating tube can be turned on to heat internal equipment within the electrical control cabinet, so as to prevent any impact on the operation of the equipment due to excessively low temperatures; when the present invention is used outdoors, a protective metal roof can be employed for snow protection. Furthermore, the present invention also includes a snow removal function.

The present invention relates to the technical field of moisture prevention and temperature reduction for electrical cabinets, and in particular to an electrical cabinet with ventilation and moisture prevention functions. The electrical cabinet comprises a cabinet body; a cabinet door; an air-cooling-based temperature reduction device; a coolant-based temperature reduction device; and a desiccant replenishment device. In the present invention, large-area dehumidification and moisture prevention is performed on the interior of the electrical cabinet by means of a corrugated moisture-proof panel; the coolant-based temperature reduction device performs liquid-cooling-based temperature reduction on components, uses a coolant for temperature reduction during circulation, thereby improving the continuous temperature reduction effect of the coolant, and is combined with the air-cooling-based temperature reduction device to achieve the effect of performing rotational air cooling on the components inside the electrical cabinet; in addition, wind power is utilized to make desiccant particles perform a full contact reaction with air, thereby further improving the saturation of water vapor adsorption by the desiccant particles, and improving the dehumidification effect.

The invention discloses an intelligent dehumidification and heat dissipation type high-low voltage switch cabinet, and belongs to the technical field of switch cabinets, the intelligent dehumidification and heat dissipation type high-low voltage switch cabinet comprises a cabinet body, a sealing strip is fixedly installed on the front side of the cabinet body, a sealing cabinet door is hinged to the front side of the cabinet body, and a temperature sensor, a humidity sensor, a controller and a control assembly are arranged in the cabinet body; a ventilation assembly, a condensation mechanism, a water collection mechanism and a heat exchange mechanism are sequentially arranged on one side of the cabinet body from top to bottom, and a ventilation assembly is arranged at the bottom of the other side of the cabinet body. Forced ventilation can be achieved through the arranged ventilation mechanism, the ventilation speed can be adjusted according to the temperature, the flow direction of air in the switch cabinet can be changed according to needs, uniform and controllable heat dissipation is achieved, heat dissipation is achieved while dehumidification is achieved through the arranged condensation mechanism, heat dissipation work is further conducted through condensate water, and the dehumidification and heat dissipation effect is improved.

The invention relates to the technical field of electric energy meters, and provides a temperature-controllable electric energy meter and method, a box body is internally provided with a positive-pressure heat dissipation mechanism, the positive-pressure heat dissipation mechanism comprises an air inlet pipe, the air inlet pipe is arranged in the box body and located below an electric energy metering module, one end of the air inlet pipe is closed, and the other end of the air inlet pipe penetrates through the side wall of the box body and is communicated with the outside; the mounting box covers the air inlet pipe, a plurality of cooling fans are arranged in the mounting box, and the cooling fans are used for sucking air flow in the air inlet pipe and discharging the air flow through the air outlet; the shielding part is arranged at the top of the box body and used for blocking the exhaust port, the shielding part is used for forming a positive pressure environment in the box body, and the shielding part can be opened when the internal pressure of the box body is larger than preset pressure so that gas in the box body can be exhausted through the exhaust port. Through cooperation of the positive pressure heat dissipation mechanism and the shielding piece, a dynamic positive pressure environment is constructed in the box body, external dusty air can be prevented from invading through gaps or heat dissipation holes from the source, and the problem of dust accumulation caused by heat dissipation of a traditional electric energy meter is thoroughly solved.

The invention discloses an electric energy metering box with an intelligent monitoring system, and relates to the technical field of electronic metering, in particular to the electric energy metering box with the intelligent monitoring system, which comprises a metering box shell and a box cover hinged to the front surface of the metering box shell, the bottom end of the metering electricity meter is provided with a plurality of power-on metering lines, and a cavity stabilizing plate capable of moving up and down is arranged at the position, close to the lower portion of the metering electricity meter, in the metering box shell. And through cooperation of the first extrusion plate, the third spring and the locking block of the metering ammeter, internal and external dual clamping forces can be formed during wiring, an extrusion stabilizing cylinder fixes an electrified metering line through symmetrical force application, hands of an operator are liberated, and wire harness deviation during wiring is avoided.

The utility model provides an energy storage high-voltage box and an energy storage system. The energy storage high-voltage box comprises a box body, a heating component set, a heat dissipation assembly and a spoiler, an installation cavity is formed in the box body, the heating component set is arranged in the installation cavity, the heat dissipation assembly is embedded in the wall face of the box body, the heat dissipation assembly comprises a heat absorption part and a heat dissipation part which are connected with each other, the heat absorption part is located in the installation cavity, and the heat dissipation part is located outside the installation cavity. The spoiler is arranged in the mounting cavity and used for driving gas in the mounting cavity to flow. According to the energy storage high-voltage box, the temperature of the box body is reduced, the temperature uniformity in the mounting cavity can be improved, and the temperature of a local position is prevented from being too high.

The invention relates to an airflow jet heat dissipation, dehumidification and dust removal system of a power device, and belongs to the technical field of power supply and distribution. Comprising an electric power device and a protection box body of the electric power device, the electric power device is arranged in the protection box body, at least one airflow ejector is installed in the protection box body, an air outlet nozzle of a jet flow nozzle of the airflow ejector corresponds to the surface of the electric power device, and the jet flow nozzle is in a wedge shape. Jet air generated by the airflow ejector efficiently and uniformly performs heat dissipation, dehumidification and dust removal on the electric power device, so that the purposes of saving air consumption, reducing energy consumption, preventing electric leakage and short circuit of electric appliances, reducing power loss, prolonging the service life of the electric power device and improving the safety and operation stability of the electric power device are achieved.

The invention discloses a primary and secondary fusion ring main unit with an anti-condensation function, and relates to the technical field of outdoor ring main units, the primary and secondary fusion ring main unit comprises a ring main unit body, the left side of the ring main unit body is provided with a protective net, the inner side of the protective net is provided with a heat dissipation assembly and a dust removal assembly which are fixedly connected with the ring main unit body, and the rear side of the heat dissipation assembly is provided with a dehumidifier; the right side of the ring main unit body is provided with an air outlet, the rear side of the ring main unit body is provided with a drainage hole, the heat dissipation assembly comprises a fixed plate A, the front of the fixed plate A is rotatably connected with four fan blades, the four fan blades are divided into two groups, and the two groups of fixed plates A are distributed left and right, the dust removal assembly comprises a fixed plate B, and the fixed plate B is fixedly provided with a fixed plate. And baffle plates are arranged on the left and right sides of the fixed plate B. The interior of the ring main unit body is dehumidified through the dehumidifier, and when a relatively large temperature difference occurs between the interior and the exterior of the ring main unit body, the phenomenon that the interior of the ring main unit body is condensed and flashover and creepage accidents occur in the ring main unit body is prevented.

The invention relates to the technical field of semiconductor electrical equipment cooling, and discloses an electrical control cabinet cooling device and a control method thereof. The thermal load trend, the maximum temperature rise expected value and the temperature rise rate change interval in the electrical control cabinet can be predicted in real time based on historical operation data training and the current operation state. The method comprises the following steps: carrying out prospective evaluation on a cooling demand by combining a feature extraction mechanism and a time sequence modeling capability so as to output a more refined predictive control parameter, and finally generating a multi-dimensional cooling control instruction according to the predictive control parameter and a current operation state so as to realize dynamic scheduling of a cooling assembly. And the response timeliness and the energy efficiency matching degree are obviously improved.

The embodiment of the invention discloses a high-voltage box heat dissipation control method, electronic equipment and a storage medium, and the method comprises the steps: determining a heat dissipation demand and related fan operation parameters based on the heating characteristics and working condition data of internal components of a high-voltage box; constructing a dynamic airflow model of an internal flow channel of the high-pressure tank, and optimizing a flow channel structure and airflow distribution of the high-pressure tank based on a fluidics principle; according to flow characteristics and structural strength requirements of the high-voltage box, hole opening parameters and a machining process are determined, and the high-voltage box is machined through the machining process according to the hole opening parameters; and verifying the heat dissipation effect of the processed high-voltage box through the constructed multi-physical field coupling model, generating a heat dissipation verification effect, and dynamically adjusting heat dissipation control parameters corresponding to the high-voltage box based on a heat dissipation verification result. According to the high-voltage box heat dissipation control scheme provided by the invention, the heat dissipation efficiency of the high-voltage box can be effectively improved, the reliability and safety of equipment operation are enhanced, and heat dissipation requirements under different working conditions are met.

The invention discloses a multi-time-scale coordination control device and method for a novel electric power system, and relates to the technical field of electric power automation. Aiming at the problems of difficulty in multi-source data collaboration, complexity in control strategy optimization and insufficient scene adaptability in a novel power system, the device realizes flexible deployment and mobile operation through a high-strength aluminum alloy frame integrated modular functional assembly; the environment monitoring module is used for high-frequency collection of multi-parameter environment data, and equipment operation safety is guaranteed; a plurality of communication protocols are supported by means of a multi-time scale control module, and distributed energy equipment is seamlessly connected; based on three core units of a data processing center module, a scene simulation unit and a cooperative control center module, second-to-hour-level electric parameter data generation, complex scene simulation verification and intelligent generation, execution and optimization of a control strategy are realized; and finally, under the complex working condition of high-proportion new energy access, the control precision, the operation stability and the comprehensive benefits of the power system are remarkably improved.

The invention relates to the technical field of intelligent power grids, in particular to a low-voltage draw-out type switch cabinet which comprises a cabinet body, a power grid arranged on the inner side wall of the cabinet body, a heat dissipation plate arranged on the inner side wall of the cabinet body, a plurality of static contacts arranged on the inner side wall of the cabinet body and a cleaning mechanism arranged on the inner side wall of the cabinet body and used for cleaning the power grid. The cleaning mechanism comprises two first electric sliding rails arranged on the inner side wall of the cabinet body, according to the low-voltage draw-out type switch cabinet, the overturning plate is driven by the first motor to rotate at multiple angles, the spraying head can evenly cover the outer corners of the cabinet body after the insect repellent is atomized, reptiles are dispersed from the source, and the low-voltage draw-out type switch cabinet is convenient to use. The cleaning mechanism can be quickly started, heat dissipation blocking and equipment faults caused by accumulation of dead insects are prevented, and it is guaranteed that the low-voltage draw-out type switch cabinet is always kept in a safe and stable working state in long-term operation.

The present application discloses a dehumidifier, an energy storage cabinet, and an energy storage device. The dehumidifier is adapted to be arranged in a cabinet body of the energy storage cabinet. The dehumidifier comprises a measurement member, a control member, and a dehumidification assembly; the measurement member is adapted to measure the air humidity in the energy storage cabinet; the control member is electrically connected to the measurement member, and when the air humidity measured by the measurement member is greater than or equal to 40% RH, the control member sends a first control instruction; and the dehumidification assembly is electrically connected to the control member and operates on the basis of the first control instruction, so as to condense moisture in the air in the energy storage cabinet. According to the dehumidifier, condensation can be actively induced, thereby reducing potential safety hazards caused by excessive humidity.

The invention relates to an outdoor protective box-type substation, which relates to the technical field of box-type substations and comprises a box body, a box door hinged to the box body and a box cover covering the top of the box body. A plurality of heat dissipation openings are formed in the opposite vertical side faces of the box body, protective covers with downward openings are fixedly arranged on the outer side opening edges of the heat dissipation openings, and drainage covers with upward openings are fixedly arranged on the inner side opening edges of the heat dissipation openings. According to the invention, the protective cover can shield most of rainwater falling from the side surface and prevent the rainwater from directly entering the heat dissipation opening, so that the risk of rainwater permeation is greatly reduced. Meanwhile, due to the design of the drainage cover, when rainwater infiltrates accidentally, water flow can be guided to flow out upwards along the cover body, and the water flow is prevented from making contact with electrical elements in the box body. The dual protection mechanism not only guarantees the heat dissipation requirement of the box-type substation, but also remarkably improves the rainproof performance of the box-type substation, and ensures the stable operation of equipment under severe weather conditions.

The invention relates to an intelligent power distribution box, and relates to the technical field of power distribution boxes, the intelligent power distribution box comprises a box body and a top cover fixedly arranged at the top of the box body, a mounting cavity is formed in the vertical surface of one side of the box body, a box door used for blocking the mounting cavity is detachably mounted on the vertical surface of one side of the box body, and a plurality of heat dissipation openings are formed in the two opposite vertical side surfaces of the box body. A protective cover with a downward opening is fixedly arranged on the opening edge of the heat dissipation opening. Vertically upward fixing rods are installed on the two opposite side faces of the top cover, the face where the fixing rods are located is perpendicular to the face where the heat dissipation openings are located, a positioning rod with one end rotationally connected with the upper end faces of the fixing rods is arranged above the top cover in the horizontal direction, and the rotating face of the positioning rod is parallel to the upper surface of the top cover; when the distribution box is installed, even if a roadside cart passes and vibrates to cause deviation of the lifting equipment, the positioning rods can keep relative positions to a certain extent, and dislocation of the through holes and the screw holes is reduced.

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.

The invention relates to the technical field of transformers, in particular to pole-mounted transformer platform complete equipment convenient to maintain, which comprises a transformer box, a distribution box is mounted at the bottom of the transformer box, a mounting bracket is mounted on one side, opposite to the distribution box, of the transformer box, and circular brackets are mounted on the left side and the right side of the mounting bracket. A plurality of cooling fins which are evenly distributed in the horizontal direction are installed on the front side and the rear side of the transformer box correspondingly, movable mechanisms are arranged on the upper sides and the lower sides of the cooling fins correspondingly, and a first cleaning mechanism is arranged on the side, away from the distribution box, of one movable mechanism; and a plurality of mounting mechanisms which are uniformly distributed in the horizontal direction are mounted on one side, far away from the distribution box, of the transformer box. Through mutual cooperation of the movable mechanism and the displacement assembly, the cooling fins rotate around the rotating center shaft, and the problem that the cooling performance is affected by dust and impurities on the peripheries of the cooling fins is solved.

The utility model provides a modularized combined low-voltage power distribution cabinet, two power distribution cabinet single bodies can be combined side by side, heat dissipation ports of the power distribution cabinet single bodies are arranged on the front sides of the power distribution cabinet single bodies, the side surfaces of the power distribution cabinet single bodies are provided with a plurality of slots, positioning plates are arranged in the slots, the slots are arranged close to the edges of the side surfaces, and the outer side walls of the slots are provided with a plurality of lock holes. Screw holes in one-to-one correspondence with the lock holes are formed in the positioning plate; the rear wall of the power distribution cabinet single body is provided with an open groove, various electrical interfaces are arranged in the open groove, the open groove is also provided with a rear cover, and the rear cover is fixed on the open groove through a bolt and seals the opening of the open groove; a wire groove is formed in the side face of the open groove and communicated with the open groove. According to the power distribution cabinet, two power distribution cabinet single bodies can be combined side by side through cooperation of the positioning plates and the slots preset in the side faces of the power distribution cabinet single bodies, the open grooves are formed in the rear sides of the power distribution cabinet single bodies, various electrical interfaces are formed in the open grooves, and the electrical interfaces can achieve line connection between the power distribution cabinet single bodies and can also achieve external line connection of the power distribution cabinet single bodies.

The invention relates to a high-energy-density reactive compensation module, which comprises a compensation unit group, an integrated heat dissipation structure, a high-speed switching circuit and a module communication interface, and is characterized in that the compensation unit group is formed by integrating a plurality of solid-state capacitors and units in a packaging shell in a three-dimensional stacking manner; the positive electrode and the negative electrode of each solid-state capacitor unit are connected in parallel through a plurality of layers of conductive busbars, the integrated heat dissipation structure is embedded in the packaging shell and comprises a heat conduction substrate, a micro-channel cooling pipe and a phase change material layer, the heat conduction substrate is in direct contact with the solid-state capacitor units, and the micro-channel cooling pipe is connected with the phase change material layer. And the micro-channel cooling pipes are distributed in the interlayer of the heat-conducting substrate. Through the design of the three-dimensional stacked solid-state capacitor and the copper-aluminum composite busbar and the combination of the hybrid isolation driving circuit and an anti-interference structure, microsecond-level switching response is realized, a multi-protocol communication interface is integrated to support cooperative control of a heterogeneous system, the problems of heat dissipation, loss and the like under high-density integration are solved, and a miniaturized and high-reliability reactive compensation solution is provided.

The present invention discloses a low-voltage switchgear cabinet, and the present invention relates to the technical field of electrical equipment. The low-voltage switchgear cabinet includes a cabinet body and a plurality of drawer units slidably connected in the cabinet body at equal intervals. A plurality of air holes are equidistantly arranged on the front end face of the drawer unit. A heat dissipation cavity communicated with the drawer unit is arranged at the rear part of the inner cavity of the cabinet body. A secondary locking mechanism for further locking and limiting the drawer unit during heat dissipation is jointly arranged between the mobile heat dissipation mechanism and the locking mechanism. A matching mechanism is arranged on the secondary locking mechanism and is used to cooperate with the locking mechanism to quickly unlock the locking mechanism so that the drawer can be quickly withdrawn. The present invention realizes targeted heat dissipation through the mobile heat dissipation mechanism, only dissipates heat from the drawer units that need to be cooled, avoids energy waste, improves energy efficiency, and provides a stronger heat dissipation effect for high-load drawers to ensure that the equipment operates at the optimal temperature. At the same time, the heat dissipation mechanism is used to realize the automatic unlocking and quick withdrawal of the drawer, without the need for additional tools, which simplifies the operation.

The invention relates to the technical field of intelligent operation and maintenance of electric control cabinets, and discloses an intelligent electric control cabinet remote operation and maintenance system based on the Internet of Things, which comprises a central control board, data acquisition equipment, a data transmission module, a data cleaning module, a fault detection module, a wireless communication module and a mobile terminal, the central control board is respectively connected with the data transmission module and the data cleaning module, the data transmission module is also connected with the data acquisition equipment, and the data cleaning module is also connected with the fault detection module. According to the intelligent electric control cabinet remote operation and maintenance system based on the Internet of Things, the operation state, fault information, early warning signals and the like of the intelligent electric control cabinet can be sensed and monitored by using the Internet of Things technology, and data analysis is automatically performed on the information through the fault detection technology; therefore, real-time monitoring, data statistics and maintenance management of the intelligent electric control cabinet are realized.

The invention discloses a directional heat dissipation power distribution cabinet with adjustable air deflectors, which relates to the technical field of equipment for power distribution cabinets and comprises a cabinet body and a heat dissipation unit arranged in the cabinet body. The heat dissipation unit comprises a directional heat dissipation assembly used for carrying out fixed-point jet cooling on key heating elements, an air guide assembly used for optimizing overall airflow organization in the cabinet, and a water cooling assembly used for carrying out pre-cooling on cooling airflow of the directional heat dissipation assembly. The directional heat dissipation assembly comprises a fan at least arranged on the top wall in the cabinet body, an air supply pipe communicated with an outlet of the fan, and an annular air pipe arranged in the power distribution cabinet and communicated with the air supply pipe. Through cooperation of the directional heat dissipation assembly and the water cooling assembly, air blown out of the air blowing pipe at the tail end of the telescopic air column is no longer ambient temperature air but low-temperature cold air cooled in advance through the liquid cooling system. According to the pre-cooling type directional air supply mechanism, the heat dissipation efficiency and the limit capacity of air cooling are greatly improved.

The invention belongs to the technical field of high-voltage switch cabinet application, and provides a new energy booster station high-voltage switch cabinet protection device which comprises a cabinet body, and the upper side of the interior of the cabinet body is provided with a moisture absorption assembly used for condensing and discharging moisture in the cabinet body. A salt mist filtering mechanism used for performing salt mist filtering on the ventilation position of the cabinet body is arranged on the lower side in the cabinet body, and the moisture absorption assembly comprises a fixing frame fixedly connected to the lower side of the top wall of the cabinet body; by arranging the salt mist filtering mechanism, the high-voltage switch cabinet used in coastal areas can be ventilated and filtered, salt mist components in coastal air are effectively isolated, the problems of metal corrosion, insulator flashover, electrical contact oxidation and the like caused by salt mist permeation are avoided, the service life of circuit components is effectively prolonged, and meanwhile, the service life of the high-voltage switch cabinet is prolonged. Salt blocks on the filter bag can be automatically removed, the permeability of the filter bag is effectively ensured, the conditions that salt blocks are accumulated, the permeability of the filter bag is poor, and heat dissipation in the cabinet is affected are avoided, and time and labor are saved in use.

The invention belongs to the technical field of metering boxes, and particularly relates to a multifunctional electric energy metering box which comprises a box body, a metering unit, a monitoring unit, a protection unit and an anti-theft unit. The mounting plate is arranged at the position close to the bottom of the box body, a fan is arranged at the bottom of the mounting plate, the mounting plate and the bottom of the box body form a sealed space, cooling liquid is stored at the bottom of the box body, and air suction pipes are evenly arranged on the two sides of the box body; the water pump is started to pump the cooling liquid into the water bag corresponding to the high-temperature area, the water bag begins to swell until the water bag swells to the maximum, the cooling liquid in the water bag is sprayed out through the nozzle, the nozzle sprays the mist cooling liquid to the cooling fins, water mist sprayed out of the nozzle is composed of a large number of tiny water drops, the surface area is larger compared with large water drops, and the cooling effect is better. According to the metering box, the contact area with air in the box body is wider, the evaporation speed is higher, heat of the surrounding environment can be absorbed in a short time, the heat dissipation capacity of individual electric appliances is improved in a targeted mode through a detection mode, and therefore the heat dissipation effect of the metering box is improved.

The invention discloses a power distribution cabinet and a power distribution cabinet group, the power distribution cabinet comprises at least two power distribution cabinets, and further comprises a base structure, an interlayer ventilation structure and a control unit, the power distribution cabinets and the base structure are installed in a sliding manner, and the interlayer ventilation structure and the base structure are fixed and communicated; the interlayer ventilation structure is installed between two adjacent power distribution cabinets, during installation, the side cover plates on the sides, corresponding to the interlayer ventilation structure, of the power distribution cabinets are removed, and the control unit is matched with the base structure, the interlayer ventilation structure and the power distribution cabinets. The equipment can realize effective heat dissipation and heat extraction, and can perform heat complementation at low temperature.

The invention relates to a metering box with a hidden wiring function, and relates to the technical field of metering boxes, and the metering box comprises a box body and a box door installed on the box body. A plurality of heat conduction openings are formed in the two opposite vertical outer side faces of the box body, and flow guide covers with openings are fixedly arranged on the outer edges of the openings of the heat conduction openings; insulating plates are fixedly arranged on two opposite vertical side surfaces of the box body, and a plurality of wiring holes are formed in the insulating plates; the side face, facing the box door, of the insulating plate is a fixing face for installing an electric meter and a circuit breaker, the inner wall, away from the box door, of the insulating plate and the box body is provided with a containing gap for containing a cable, and the two ends of the cable penetrate through the corresponding wiring holes to be connected with the electric meter and the circuit breaker respectively. When the metering box is applied, the cable main body can be hidden in the accommodating gap, so that the possibility that a worker mistakenly touches the cable is greatly reduced, and the dangerous conditions of cable damage, short circuit, electric leakage and the like caused by mistaken touch are avoided.

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.