JP Distribution Cabinet

The JP Distribution Cabinet is a comprehensive distribution device specifically designed for outdoor low-voltage power distribution scenarios. Its core positioning is as an ideal product for urban and rural power grid renovations, and it is also suitable for various outdoor low-voltage power distribution requirements. This equipment integrates multiple functions such as metering, outgoing lines, and reactive power compensation, and features comprehensive protection functions including short circuit, overload, overvoltage, and leakage protection. It is compact in size, aesthetically pleasing in appearance, and economically practical. It can be directly installed on the poles of outdoor pole-mounted transformers without the need for complex installation foundations. As an outdoor-specific distribution device, its cabinet body is made of thickened cold-rolled steel plates or stainless steel, equipped with outdoor-specific rainproof structures, and its surface is treated with high-temperature electrostatic spraying. It has excellent anti-aging, corrosion-resistant, sun protection, and rainproof properties, and can operate stably in outdoor open-air environments for a long time. It is compatible with AC 50Hz, rated voltages of 380V/220V low-voltage power distribution systems. Installation and maintenance are convenient, making it a reliable choice for outdoor power distribution.

Technical Specifications

What about the outdoor protection capability?

The JP Distribution Cabinet adopts a dual structure design of professional rain shelters and sealing rubber strips, combined with an overall sealing process, to form a triple protection system. The protection level can reach IP54, which can effectively prevent dust, water and sunlight. It completely isolates outdoor wind and rain, as well as dust intrusion, and is suitable for outdoor and open-air harsh environments. Even if exposed to long-term sun exposure and rain, it can maintain stable operation without worrying about damage caused by environmental factors to the equipment.

Is the functional configuration complete?

Breaking the limitation of the traditional distribution equipment's single function, it integrates functions such as distribution control, power metering, reactive power compensation, and leakage protection. It can flexibly assemble various electrical components such as circuit breakers, electricity meters, capacitor compensation, transformers, leakage protection, etc., without the need for additional matching of other equipment. It can meet the entire process distribution needs of rural distribution areas, parks, etc. in one step, simplify the distribution link, and reduce procurement and deployment costs.

Has the process met the standards?

We strictly follow the national power safety regulations for design and production. We use national standard processes to build, equip with a complete grounding system and five-prevention interlock protection device, and combine with a sturdy anti-theft door lock. The JP Distribution Cabinet adopts a full-round-edge grinding process, without any burrs. It is safer to use and fully complies with the power engineering acceptance standards. It can be directly used in various formal power distribution projects such as municipal, rural power grids, and parks, without the need for additional modifications.

How durable is it for outdoor use?

Choose the outdoor-specific high-temperature electrostatic powder coating process, combined with thickened cold-rolled steel plates or stainless steel cabinets. It has excellent anti-aging performance. Even when exposed to outdoor sun and rain for a long time, it will not easily suffer from aging, rusting, or paint peeling problems. It is highly durable and resistant, significantly reducing the frequency and cost of maintenance in the future, extending the service life of the equipment, and meeting the requirements for long-term outdoor operation.

Is there lightning protection for outdoor use?

To address the pain point of outdoor power distribution being prone to lightning strikes, JP Distribution Cabinet specially integrates lightning protection modules, which can effectively resist lightning interference and prevent damage to equipment and lines caused by lightning strikes. It perfectly suits outdoor power distribution scenarios in rural areas and other outdoor power distribution environments, completely eliminating the lightning hazard in outdoor power distribution and ensuring the safe and stable operation of the power distribution system.

Can it meet the requirements of different projects?

It supports customization based on the capacity of each transformer area. According to the actual needs of different projects, it provides non-standard size, hole opening and scheme customization services, flexibly adapting to the power distribution needs of rural transformer areas, outdoor communities, industrial parks and other different scenarios. Regardless of the project scale or differences in requirements, it can precisely match and improve the project adaptability.

Which scenarios are compatible with it?

The JP Distribution Cabinet, with its excellent outdoor protection performance and flexible adaptability, is widely used in various outdoor low-voltage distribution scenarios: rural distribution areas, outdoor low-voltage comprehensive distribution in villages and towns, helping to upgrade the rural power grid; outdoor distribution in residential areas and property distribution rooms, ensuring the safety of outdoor distribution in residential areas; outdoor distribution in industrial parks and factory perimeters, providing stable power support for industrial production; outdoor distribution for municipal road lighting, charging piles, and water pump stations, meeting the needs of municipal engineering; temporary construction power supply for infrastructure projects, photovoltaic grid connection, and distribution area renovation projects, meeting both temporary and long-term power distribution needs, comprehensively covering outdoor distribution scenarios, and becoming the core standard for outdoor low-voltage distribution.

Retrofit Project Overview

I. Project Profile

This project involves the upgrading of the rural power grid and associated retrofitting for distributed photovoltaic (PV) integration; it is classified as a State Grid standardized rural grid renovation project. The area serves a cluster of rural households. The existing distribution equipment was outdated, low-voltage feeder layouts were disorganized, and there was a lack of centralized reactive power compensation and comprehensive earth-leakage protection. Furthermore, the addition of numerous rooftop distributed PV systems caused significant voltage fluctuations, low power factors, and severe line losses, resulting in chronic issues such as unstable voltage at the line ends and penalties for substandard power factor performance.

To standardize low-voltage distribution, implement centralized reactive power compensation, enhance earth-leakage protection, and accommodate PV grid-connection requirements, standardized outdoor integrated distribution cabinets (JP cabinets) are being installed on the low-voltage side of each distribution transformer. These cabinets integrate metering, power distribution, protection, reactive power compensation, and PV connection terminals, enabling standardized, intelligent, and low-loss operation of the distribution area.

II. Issues Prior to Retrofit

Low power factor: Rural loads consist primarily of inductive equipment such as water pumps, fans, and household appliances. Without centralized compensation, the power factor consistently remained below 0.85, incurring financial penalties.

High line losses and unstable voltage: Low-voltage feeders lacked sectional protection and featured disorganized wiring, resulting in significant voltage drops; voltage levels were excessively high during off-peak night hours and too low during peak consumption periods.

Lack of safety protection: The original setup lacked unified protection against earth leakage, overloads, and short circuits; hazardous wiring practices—such as unauthorized connections and leakage in household lines—posed risks of electric shock and fire.

Significant voltage fluctuations due to PV grid connection: With rooftop PV systems utilizing self-generated power and feeding surplus electricity back to the grid, reverse power flow caused voltage drift and excessive fluctuations, compromising the safety of residents' electrical equipment.

Non-standardized equipment and difficult O&M: The aging distribution area lacked standardized integrated equipment; components were scattered, troubleshooting was slow, and remote data monitoring was impossible. III. Equipment Configuration Plan

In accordance with State Grid standards for rural power grid construction and the operating conditions of PV-integrated distribution areas, each distribution zone is uniformly equipped with a JP-type outdoor integrated low-voltage distribution cabinet. This unit integrates the incoming switch, multiple outgoing circuits, intelligent reactive power compensation, metering and data collection, earth-leakage protection, and a smart distribution terminal, suitable for either pole-mounted or ground-mounted installation.

Core Equipment Specifications

Model: JP Outdoor Integrated Distribution Cabinet (Rural Grid Standard)

Applicable Capacity: 100kVA/200kVA distribution zones

Rated Voltage: 0.4kV three-phase four-wire system

Cabinet Structure: Outdoor rainproof and dustproof design; high-strength steel plate with electrostatic powder coating; fully enclosed anti-theft structure

Integrated Functions: Main incoming line protection, multiple outgoing branch circuits, intelligent dynamic reactive power compensation, energy metering, remote data acquisition, earth-leakage protection

Compensation Method: Intelligent controller-based dynamic switching; automatic adjustment of reactive power capacity based on load and PV output

Protection Rating: IP54 (rainproof, dustproof, condensation-resistant, tamper-proof); suitable for exposed outdoor environments

Installation Method: Pole-mounted (on transformer pole) or ground-mounted; convenient installation and standardized layout

IV. Construction and Application Highlights

Integrated Design and Standardization: Consolidates power distribution, compensation, metering, protection, and monitoring functions into a single unit; resolves issues of scattered equipment and messy wiring; fully complies with State Grid standards for distribution zone construction.

Dynamic Reactive Power Compensation for PV Zones: Automatically switches capacitors based on load fluctuations—such as high PV output during the day and no output at night—to resolve issues like overvoltage from PV grid connection and power factor instability.

Multiple Safety Protections: Equipped with short-circuit, overload, earth-leakage, and phase-loss protection; isolates faults in individual circuits to prevent widespread power outages and electrical fire hazards.

High Outdoor Durability: Fully enclosed, rainproof, and dustproof structure; withstands harsh rural environments characterized by direct sunlight, rain, and significant temperature fluctuations; supports long-term, maintenance-free operation. Intelligent Remote Operations and Maintenance (O&M): Integrates intelligent distribution transformer area terminals to enable remote monitoring of voltage, current, power factor, and energy consumption data, facilitating fault early warning and refined O&M management.

V. Operational Results After Retrofitting

Complete elimination of power factor penalties: The power factor of the distribution area is stably improved to above 0.95, fully meeting State Grid assessment standards and eliminating all power factor-related penalties.

Significant loss reduction and energy savings: Low-voltage line losses are drastically reduced, keeping distribution area line losses within standard limits and saving a substantial amount of electricity annually.

Stable voltage quality meeting standards: Effectively suppresses voltage fluctuations caused by grid-connected PV systems and balances peak/off-peak voltage levels, thoroughly resolving issues with unstable residential voltage and the inability to operate electrical appliances properly.

Greatly enhanced electrical safety: Features independent branch protection and precise tripping for earth leakage and short-circuit faults, effectively preventing electric shock accidents and electrical fires in the distribution area.

Intelligent and standardized O&M: Enables remote data monitoring and control, rapid and accurate fault localization, and a significant reduction in O&M workload, ensuring the distribution area passes standardization acceptance inspections on the first attempt.

VI. Case Summary

The JP integrated distribution cabinet is a core piece of equipment standardized by the State Grid for rural power grids, outdoor distribution areas, distributed PV integration, and the retrofitting of aging distribution areas. Integrating power distribution, reactive power compensation, metering, protection, and intelligent monitoring, it offers unique advantages such as low cost, rapid installation, high protection ratings, and maintenance-free operation. It is the preferred terminal distribution equipment for the standardized construction of low-voltage distribution areas, loss reduction, efficiency improvement, and safety enhancement.