Durable Metal Enclosed Switchgear

I. Product Overview

JP integrated distribution cabinet (referred to as JP cabinet) is an outdoor integrated distribution device specially designed for 10kV/0.4kV distribution transformer stations. It corely integrates five core functions: low-voltage distribution, reactive power compensation, electric energy metering, safety protection, and intelligent monitoring. There is no need to configure additional auxiliary equipment. One cabinet can complete station area power distribution, energy consumption optimization, safety protection and remote management. It is a core supporting equipment for urban and rural power grids, rural network transformation, and intelligent station area construction.

This product is designed, produced and inspected in strict accordance with national, industrial and power grid standards such as GB 7251.1-2013 "Low-voltage switchgear and controlgear - Part 1: Type-tested and partially type-tested assemblies", DL/T 5222-2019 "Technical regulations for selection and design of conductors and electrical apparatus", and State Grid's "Code for standardized construction of rural power grid stations". It is fully compatible with the construction requirements of State Grid and China Southern Power Grid stations, ensuring that product performance is compliant, operation is reliable, and installation is convenient.

The JP cabinet adopts an outdoor-specific sealed structure, featuring rainproof, dustproof, rustproof, corrosion-resistant, and anti-external damage properties. It can adapt to various harsh outdoor environments such as high temperature, low temperature, high humidity, heavy dust, and strong ultraviolet rays. It is widely used in rural network transformation, urban-rural junction stations, industrial parks, new rural construction, photovoltaic/wind power stations, agricultural irrigation, farms, street lamp distribution and other scenarios. It is a key equipment to realize standardized, intelligent and energy-saving operation of stations.

Core positioning of the product: With "integration, intelligence, outdoorization, and convenience" as the core, it simplifies the layout of station equipment, reduces construction and operation and maintenance costs, improves power supply quality and safety levels, adapts to the development needs of smart grids, and provides one-stop power distribution solutions for low-voltage stations.

II. Core Structure and Detailed Features

(1) Cabinet Structure: Outdoor-specific, sturdy and durable

Material and craftsmanship: The cabinet body is made of 1.5~2.0mm high-quality cold-rolled steel plate or 304 stainless steel (optional), formed by CNC bending, precision welding, and modular assembly. It has high mechanical strength, can withstand outdoor wind loads, snow loads and slight external impact, and is not easy to deform or rust. The surface undergoes three refined treatments of "pickling → phosphating → electrostatic spraying". The spraying layer uses outdoor-specific weather-resistant powder, which has strong adhesion, UV resistance, high and low temperature resistance, and corrosion resistance. It can effectively resist outdoor sun, rain, dust and oil pollution erosion, and has a service life of more than 15 years.

Outdoor sealing protection: It adopts a fully enclosed structure, with the cabinet door closely fitting the cabinet body, equipped with special weather-resistant sealing strips. The protection level reaches IP54 and above (can be upgraded to IP65 according to needs), effectively achieving rainproof, dustproof, anti-foreign object intrusion, and anti-mosquito entry, ensuring long-term stable operation of internal components in harsh outdoor environments. The bottom of the cabinet is equipped with drainage holes, which can timely discharge condensation inside the cabinet to prevent components from being damaged by moisture.

Anti-theft and anti-external force design: It uses outdoor-specific anti-theft door locks with a firm structure, which can effectively prevent non-professionals from opening and stealing internal components. The corners of the cabinet are rounded to avoid sharp corners from scratching people and enhance structural stability. Optional anti-smashing and anti-prying reinforcing plates are available, suitable for remote stations and outdoor unattended scenarios to prevent external damage.

Flexible installation methods: Three installation methods are supported to adapt to different station scenarios:

Pole-mounted type: Can be directly fixed on electric poles, no need to occupy ground space, suitable for rural network scenarios with tight land and scattered stations.

Wall-mounted type: Can be fixed on walls and transformer racks, with convenient installation and space saving.

Floor-mounted type: Placed on the ground foundation, suitable for stations with large loads and many components, facilitating later maintenance and expansion.

Cabinet size and layout: The standard cabinet size can be customized according to station load and component configuration. The conventional sizes (height × width × depth) are 1200×800×600mm, 1500×1000×800mm, etc., adapting to different station spaces. The interior of the cabinet adopts a layered and zoned design with a clear layout, facilitating operation, maintenance and wiring.

(2) Internal Zoning: Scientific and reasonable, safe and convenient

The cabinet is strictly divided into five independent functional areas, each separated by metal partitions without interfering with each other. This not only ensures operational safety but also facilitates zoned maintenance, meeting the requirements of standardized station construction:

Incoming line room: Located at the upper part or one side of the cabinet, used to connect the output cable of the low-voltage side of the transformer. It is equipped with incoming line circuit breakers and isolating switches to realize power access and total control. The incoming line terminals use high-current copper terminals with low contact resistance and strong current-carrying capacity, which can adapt to cables of different cross-sections.

Metering room: With an independent sealed design, it is equipped with multi-functional smart electric meters, current transformers, and terminal blocks to achieve accurate electric energy metering (active, reactive, peak-valley-flat metering). The metering room is equipped with a special observation window, through which meter data can be directly viewed without opening the cabinet door. It also has anti-stealing electricity function, complying with power grid metering specifications.

Capacitor compensation room: Intelligent capacitor modules, reactors, and compensation controllers are centrally installed for automatic reactive power compensation. Sufficient ventilation space is reserved in the room, and heat dissipation devices are equipped to avoid overheating damage to capacitor modules and ensure stable compensation effect.

Outgoing line room: Located at the lower part of the cabinet, equipped with multiple outgoing line circuit breakers, fuses, and residual current operated protectors (RCD) to realize shunt control and protection of each branch load (such as lighting, irrigation, residential electricity, industrial loads). The outgoing line terminals are neatly arranged with standardized wiring, facilitating wiring and fault.

Intelligent control room: Integrates intelligent monitoring terminals, communication modules, protection relays, indicator lights, etc., to realize functions such as equipment operation status monitoring, remote control, and fault alarm. The control room is equipped with a liquid crystal display, which can intuitively display operating parameters such as voltage, current, power factor, and leakage current, with convenient operation.

(3) Wiring and Heat Dissipation: Standard and reasonable, ensuring stability

Wiring specifications: Flame-retardant copper core cables are used for wiring inside the cabinet. The wire diameter is matched according to the rated current, with firm wiring and neat arrangement to avoid line cross-interference. All terminals are marked with clear identifiers, including line numbers and usage instructions, facilitating daily inspection, maintenance and fault排查. Both incoming and outgoing lines are equipped with cable fixing clips to prevent cable pulling and abrasion, ensuring wiring safety.

Heat dissipation design: The cabinet adopts a combination of natural ventilation and forced heat dissipation. The cabinet door and side panels are equipped with ventilation shutters (with dust screens) to ensure smooth air circulation, which can effectively dissipate heat generated by internal components during operation. Heat dissipation fans can be added to the capacitor compensation room and intelligent control room according to needs to avoid component failures due to overheating and ensure long-term stable operation of the equipment.

III. Core Functions and Application Value

(1) Core Functions (full-scenario coverage)

Low-voltage distribution function: As the core of low-voltage distribution in the station, it realizes the distribution and control of electric energy on the low-voltage side of the transformer. The incoming line room is equipped with a main circuit breaker, and the outgoing line room is equipped with multiple branch circuit breakers. According to the station load demand, the outgoing line circuits can be flexibly configured to distribute electric energy safely and stably to each branch load (residential electricity, agricultural irrigation, industrial equipment, street lamps, etc.), realizing shunt control and shunt protection, and facilitating load management.

Automatic reactive power compensation function: Equipped with intelligent capacitor compensation modules, reactors, and compensation controllers. The core advantage is that it can **automatically switch capacitor modules** according to changes in the station load power factor without manual intervention:

When the load power factor is lower than the set value (such as 0.85), the controller automatically puts in the capacitor module to compensate reactive power.

When the load power factor is higher than the set value, the capacitor module is automatically cut off to avoid over-compensation.

Reactors can be optionally equipped to suppress harmonics, protect capacitor modules, improve power supply quality, and reduce line losses.

Electric energy metering function: The metering room is equipped with multi-functional smart electric meters and current transformers that meet State Grid standards to achieve accurate electric energy metering, including active energy, reactive energy, peak-valley-flat energy metering. It can real-time monitor operating parameters such as voltage, current, power, and power factor. Metering data can be uploaded to the power grid monitoring platform through communication modules to realize remote meter reading, avoiding manual on-site meter reading, improving meter reading efficiency, and having anti-stealing electricity design to ensure metering accuracy.

Comprehensive safety protection function: Equipped with complete protection components to realize comprehensive protection of lines, equipment, and personnel, eliminating potential safety hazards:

Overload protection: When the line or equipment is overloaded, the circuit breaker automatically trips to prevent equipment burnout and line overheating.

Short-circuit protection: When a short circuit occurs in the line, the circuit breaker quickly cuts off the short-circuit current to prevent the expansion of short-circuit accidents.

Leakage protection: Equipped with residual current operated protectors (total protection + branch protection). When leakage occurs in the line or equipment, it trips in time to prevent electric shock accidents and ensure personal safety.

Overvoltage/undervoltage protection: When the grid voltage is abnormal (too high or too low), the protection relay acts to cut off the power supply and protect sensitive equipment.

Phase loss protection: For three-phase loads, a phase loss protection module is equipped to prevent motor and other equipment from burning due to phase loss operation.

Lightning protection: Equipped with lightning arresters, which can effectively resist lightning overvoltage shocks and protect internal components and lines.

Intelligent remote management function: Integrates intelligent monitoring terminals and communication modules (supporting 4G, NB-IoT, RS485 and other communication methods), which can seamlessly access the power grid automation system to realize the "four remote" functions: At the same time, the intelligent terminal has fault recording and data statistics functions, facilitating operation and maintenance personnel to analyze the operation status of the station and formulate operation and maintenance plans.

Remote measurement: Remotely monitor operating parameters such as voltage, current, power, power factor, electric energy, leakage current, and equipment temperature.

Remote signaling: Remotely monitor equipment operating status (closing, opening, fault), and automatically upload alarm information when a fault occurs.

Remote control: Remotely control circuit breaker opening and closing, capacitor module switching, to realize remote operation and maintenance.

Remote adjustment: Remotely adjust compensation parameters and protection thresholds to adapt to different load change needs.

Auxiliary functions (optional):

Temperature and humidity control: Equipped with temperature and humidity sensors, heaters, and cooling fans to automatically adjust the temperature and humidity inside the cabinet to prevent condensation and overheating.

Anti-stealing electricity function: The metering room has a sealed design and is equipped with anti-stealing electricity terminals to prevent artificial electricity theft.

Photovoltaic grid-connection adaptation: Can be configured with special terminals and protection components for photovoltaic grid-connection to meet the grid-connection needs of photovoltaic stations.

Voice alarm: Issues voice alarms when a fault occurs, facilitating on-site personnel to quickly detect faults.

(2) Application Value

Simplify station layout and reduce construction costs: Integrating five core functions, there is no need to configure separate equipment for power distribution, compensation, and metering, reducing the number of equipment and floor space, simplifying on-site installation, shortening the construction period, and significantly reducing station construction costs.

Energy saving and loss reduction, improve power supply quality: The automatic reactive power compensation function can increase the station power factor to more than 0.95, reduce line loss by 10%-30%, and stabilize the low-voltage side output voltage, controlling the voltage deviation within ±2% to avoid voltage fluctuations affecting user electricity use.

Ensure safe operation and eliminate potential safety hazards: The comprehensive protection function effectively prevents faults such as overload, short circuit, leakage, and lightning strike, eliminates personal electric shock and equipment damage accidents, adapts to outdoor unattended scenarios, and improves the safety level of the station.

Intelligent operation and maintenance, reduce operation and maintenance costs: Remote meter reading, remote monitoring, and fault alarm functions reduce the labor input for on-site inspection, shorten the time for fault detection and handling, reduce operation and maintenance costs, and realize "unattended, remotely controllable" stations.

Adapt to various scenarios with strong versatility: The outdoor-specific sealed structure can adapt to various scenarios such as rural power grids, urban power grids, and industrial parks. The installation method is flexible, and the configuration can be customized according to station needs, with strong versatility.

Compliant with standards, easy for acceptance: Strictly designed and produced in accordance with national, industrial and power grid standards, meeting the requirements of standardized station construction, and can successfully pass the acceptance of electric power departments and supervision units, adapting to the station construction projects of State Grid and China Southern Power Grid.

IV. Full-dimensional Technical Parameters（customizable）

Parameter Category | Core Specifications | Detailed Description

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Rated voltage | AC 0.4kV (three-phase four-wire) | Adapt to the low-voltage side output of 10kV transformers, in line with low-voltage distribution network standards

Rated frequency | 50Hz | In line with industrial frequency power grid standards, suitable for various low-voltage loads

Rated current | 100A, 250A, 400A, 630A | Cover different station load requirements, and can be customized with larger current specifications

Compensation capacity | 10kvar, 20kvar, 30kvar, 40kvar | Intelligent capacitor modules, automatic switching, compensation capacity can be customized according to load

Compensation accuracy | Power factor ≥ 0.95 | Can effectively reduce line loss and improve power supply quality

Protection level | IP54 (standard), IP65 (optional) | IP54: rainproof, dustproof, anti-foreign objects; IP65: completely dustproof, anti-spray water

Cabinet material | Cold-rolled steel plate / 304 stainless steel | Thickness 1.5~2.0mm, surface pickling and phosphating + outdoor weather-resistant spraying

Installation method | Pole-mounted, wall-mounted, floor-mounted | Adapt to different station scenarios, easy to install

Communication method | 4G, NB-IoT, RS485 (optional) | Support remote meter reading and remote monitoring, seamlessly access the distribution network automation system

Working environment | Temperature: -30℃～+60℃; Humidity: ≤95% (no condensation); Altitude: ≤2000m | Adapt to various harsh outdoor environments, enhanced configuration can be customized for high-altitude and low-temperature areas

Protection functions | Overload, short circuit, leakage, overvoltage, undervoltage, phase loss, lightning protection | Comprehensive protection to ensure the safety of equipment and personnel

Executive standard | GB 7251.1-2013, DL/T 5222-2019 | In line with national, industrial and power grid standards, passing type test and factory inspection

Service life | ≥15 years | Under normal operation and regular maintenance, the service life can reach more than 15 years

V. Core Product Advantages (differentiated highlights · key points of the bid)

(1) Highly integrated, one-stop solution

Integrating low-voltage distribution, reactive power compensation, electric energy metering, safety protection, and intelligent monitoring, one cabinet replaces multiple devices, simplifying the station layout, reducing equipment floor space and installation workload, lowering station construction costs and later maintenance costs, and adapting to the needs of standardized station construction.

(2) Outdoor-specific, strong environmental adaptability

Adopting outdoor weather-resistant materials and a fully sealed structure, with a protection level of IP54 and above, it is resistant to high and low temperatures, moisture, corrosion, dust, and external damage. It can operate stably for a long time in harsh outdoor environments of -30℃～+60℃ without additional protective measures, suitable for outdoor unattended scenarios such as rural power grids and remote stations.

(3) Energy saving and loss reduction, improve power supply quality

Intelligent automatic reactive power compensation can automatically switch capacitor modules according to load changes, increasing the power factor to more than 0.95, significantly reducing line loss, and stabilizing the low-voltage side output voltage, avoiding voltage fluctuations, improving power supply quality, meeting user electricity needs, and complying with energy-saving and loss-reduction policies.

(4) Safe and reliable, comprehensive protection

It has comprehensive protection functions such as overload, short circuit, leakage, overvoltage, undervoltage, phase loss, and lightning protection. It is equipped with total protection + branch protection leakage protection to eliminate hidden dangers of personal electric shock and equipment failure. The metering room is sealed to prevent electricity theft, and the cabinet is anti-theft and anti-prying, ensuring the safety of equipment and electric energy, suitable for outdoor unattended scenarios.

(5) Intelligent operation and maintenance, efficient and convenient

Support 4G/NB-IoT remote communication, realize remote meter reading, remote monitoring, remote control, and fault alarm, reduce the labor input for on-site inspection, shorten the time for fault detection and handling, realize "unattended, remotely controllable" stations, reduce operation and maintenance costs, and improve operation and maintenance efficiency.

(6) Flexible installation, adapting to various scenarios

Support three installation methods: pole-mounted, wall-mounted, and floor-mounted. The cabinet size can be customized according to station load and installation scenarios. The incoming and outgoing line methods are flexible, adapting to various scenarios such as rural power grids, urban power grids, industrial parks, photovoltaic stations, and agricultural irrigation, with strong versatility.

(7) Compliant with standards, easy for acceptance

Strictly designed and produced in accordance with national, industrial and power grid standards, in line with the standardized construction specifications of State Grid and China Southern Power Grid stations, passing 3C certification, type test and factory inspection, and can successfully pass the acceptance of electric power departments and supervision units, adapting to various