The GGD Low Voltage Power Distribution Panel is designed for indoor power distribution applications with rated frequency of 50Hz and rated working voltage up to 380/400V. Its cabinet structure, copper busbars, control circuits and protection components can be configured according to project requirements. The solution is suitable for power plants, substations, factories, mining enterprises, commercial buildings and other electrical distribution facilities.
The GGD Low Voltage Power Distribution Panel is designed as a centralized low-voltage distribution unit. It can receive electrical power from the upstream system and distribute it to multiple outgoing circuits for equipment, lighting, motors and other loads.
The cabinet can be arranged as an incoming cabinet, outgoing distribution cabinet, capacitor compensation cabinet or other configurations according to the electrical single-line diagram. This makes the system easier to integrate into different industrial and commercial distribution networks.
The internal arrangement separates major electrical components and control wiring according to the project design. Universal circuit breakers, molded case circuit breakers, miniature circuit breakers, contactors, relays, meters and other components can be selected according to the required circuit functions.
For projects requiring customized component brands or specifications, Usune can coordinate the component selection with the buyer before production.
The cabinet frame and partitions are manufactured from cold-rolled steel plate. The reference plate thickness is ≥2mm, with finished edges treated to reduce sharp edges during operation and maintenance.
The cabinet structure is designed to provide sufficient mechanical strength for normal operation while allowing access for inspection, wiring and component replacement. The front and rear doors are arranged for practical operation and maintenance.
Electrolytic copper is used for the main and branch busbars. Insulation and heat-shrinkable protective materials can be applied to the busbar system to maintain the required dielectric performance.
Phase identification is provided for the busbar arrangement, while busbar joints are processed according to the required electrical connection method. A flexible busbar connection can also be provided where required between the incoming bus bridge and the main circuit breaker.
A dedicated PE copper bus is arranged along the cabinet assembly direction. Components requiring grounding can be connected through the PE system, with grounding terminals provided for connection to the external grounding network.
The cable compartment can also reserve sufficient space for cable heads and related current transformer installation according to the project drawing.
Incoming cabinets can be equipped with universal circuit breakers and corresponding protection functions. The supplied configuration can include electric-operation circuit breakers with undervoltage trip protection and time-delay functions according to the electrical design.
The protection and control configuration is determined by the project requirements rather than being limited to one fixed component combination.
Outgoing circuits can be arranged for different loads and distribution requirements. Circuit breakers, contactors, thermal relays and terminal blocks can be selected according to the rated current and control requirements of each feeder.
The cabinet layout supports clear circuit identification, with device numbers and wiring labels positioned for easier inspection and maintenance.
For motor applications, the cabinet can integrate motor control circuits with appropriate switching and protection components. Start/stop indication lights and circuit identification can be arranged on the cabinet panel to help operators quickly identify individual motor circuits.
The secondary control circuits are wired according to the approved electrical drawings. Flexible conductors are arranged in organized bundles, with appropriate insulation and sleeves used where wiring passes through movable or mechanically exposed areas.
The reference cross-sections include 1.5 mm² for control and AC voltage circuits and 2.5 mm² for AC current circuits, subject to the final electrical design.
Terminal blocks use flame-retardant components, while conductors are identified according to the circuit numbering or conductor direction shown on the drawings. Hand-written internal labels are avoided; circuit numbers and equipment identification are printed or hot-stamped for clearer long-term maintenance.
The GGD Low Voltage Power Distribution Panel is designed around the following reference parameters:
| Item | Specification |
| Product Type | GGD Low Voltage Power Distribution Panel |
| Rated Voltage | 0.4kV |
| Rated Frequency | 50Hz |
| Rated Current | Up to 3150A |
| Protection Degree | IP23 |
| Installation | Indoor |
| Pollution Level | Level 3 |
| Altitude | ≤1000m |
| Ambient Temperature | -10°C to +40°C |
| Daily Average Relative Humidity | ≤95% |
| Monthly Average Relative Humidity | ≤90% |
| Seismic Intensity | Up to magnitude 8 |
Final electrical parameters, cabinet dimensions and component selection are determined according to the approved technical drawing and project requirements.
| Model | Rated voltage (V) | Rated current (A) | Rated short-circuit breaking current (KA) | Rated short-time withstand current(1s) (kA) | Rated peak withstand current (kA) | |
| GGD1 | 380 | A | 1000 | 15 | 15 | 30 |
| B | 600(630) | |||||
| C | 400 | |||||
| GGD2 | 380 | A | 1500(1600) | 30 | 30 | 63 |
| B | 1000 | |||||
| C | 600 | |||||
| GGD3 | 380 | A | 3150 | 50 | 50 | 105 |
| B | 2500 | |||||
| C | 2000 | |||||
| Product code | A | B | C | D |
| GGD06 | 600 | 600 | 450 | 556 |
| GGD06A | 600 | 800 | 450 | 756 |
| GGD08 | 800 | 600 | 650 | 556 |
| GGD08A | 800 | 800 | 650 | 756 |
| GGD10A | 1000 | 600 | 850 | 556 |
| GGD10A | 1000 | 800 | 850 | 756 |
| GGD12 | 1200 | 800 | 1050 | 756 |
In factories, workshops and mining facilities, the GGD Low Voltage Power Distribution Panel can serve as the central distribution point for production equipment, motors, lighting and auxiliary systems.
The cabinet can be configured for commercial and high-rise building distribution networks where multiple outgoing circuits require centralized protection, measurement and control.
Power plants and substations can use the equipment for low-voltage auxiliary power distribution and downstream electrical systems, with the internal configuration adapted to the project's single-line diagram.
The equipment is intended for indoor installation. The reference operating temperature is -10°C to +40°C, with an altitude of up to 1000m.
The surrounding environment should be free from severe vibration, impact and corrosive conditions. When special environmental requirements exist, technical conditions can be discussed between Usune and the buyer before production.
During installation, the inclination of the equipment to the vertical plane should not exceed 5°. Proper installation helps maintain cabinet alignment, door operation and electrical connection reliability.
The design and manufacturing of the GGD Low Voltage Power Distribution Panel follow applicable low-voltage switchgear requirements, including relevant GB and IEC standards. The supplied equipment can be manufactured according to the latest applicable project specifications and approved technical documentation.
Key reference standards include GB/T 14048.2, GB 7251.12, IEC 439-1, GB 4942.2 and other applicable electrical standards specified by the project.
Usune's manufacturing and quality management activities are supported by ISO 9001, ISO 14001 and ISO 45001 systems. Electrical products can also be supplied with CE certification, together with relevant test documentation according to the product configuration.
| Comparison Item | GGD Low Voltage Power Distribution Panel | Withdrawable Switchgear | Fixed-Type Distribution Cabinet |
| Main Purpose | Low-voltage power distribution, control and protection | Frequent circuit switching and maintenance | Basic power distribution |
| Typical Voltage | 0.4kV | Low/medium voltage depending on configuration | Low voltage |
| Cabinet Structure | Fixed modular cabinet | Withdrawable drawer/trolley structure | Fixed installation |
| Circuit Access | Front and rear maintenance depending on design | Fast withdrawal of functional units | Conventional maintenance access |
| Configuration Flexibility | High | Very high | Moderate |
| Busbar System | Copper main and branch busbars | Compartmentalized busbar arrangement | Copper or aluminum busbars |
| Suitable Loads | Feeders, motors, lighting, auxiliary systems | Multiple feeders and motor control circuits | General distribution loads |
| Maintenance Approach | Component-level inspection and replacement | Functional unit withdrawal for maintenance | Component-level maintenance |
| Project Customization | Single-line diagram and component-based customization | Drawer configuration customization | Basic configuration customization |
| Typical Applications | Factories, substations, power plants, buildings | Industrial distribution and motor control | Commercial and general-purpose distribution |
The GGD Low Voltage Power Distribution Panel is particularly suitable when the project requires a robust centralized distribution cabinet with a clear internal structure, copper busbar system and flexible selection of incoming, outgoing and control circuits.
For projects where rapid replacement of individual functional units is the primary requirement, a withdrawable configuration may be more appropriate. For simpler distribution networks with fewer circuit changes, a fixed-type cabinet can provide a more straightforward solution.
Usune can select the cabinet structure, circuit breakers, busbar arrangement, control components and internal wiring according to the project's single-line diagram and technical requirements.
The GGD Low Voltage Power Distribution Panel has been referenced for the Cas-space Rocket Launch Project, demonstrating its application in a project environment where structured low-voltage distribution and electrical equipment reliability are important.
Zhejiang Usune Electric Co., Ltd. has more than 14 years of experience in the electrical equipment field, supported by an experienced R&D team capable of developing configurations according to project-specific requirements.
From electrical components and cabinet fabrication to internal wiring and final inspection, Usune applies controlled production and quality inspection procedures. Standard production lead time is approximately 15–20 days, depending on configuration and order quantity.
For projects requiring specific circuit breakers, control components, cabinet dimensions, busbar arrangements or wiring configurations, Usune can develop the equipment based on the buyer's single-line diagram and technical specifications.
The standard reference rated voltage is 0.4kV, with a rated frequency of 50Hz. Final parameters depend on the project design.
The supplied configuration can reach 3150A, subject to the selected circuit breaker, busbar and overall electrical design.
Yes. Cabinet dimensions, electrical components, incoming and outgoing circuits, control functions, busbar arrangements and other details can be customized according to approved drawings.
The configuration can include universal circuit breakers, molded case circuit breakers, miniature circuit breakers, contactors, thermal relays, meters and other components according to the project requirements.
The normal production period is approximately 15–20 days, depending on the quantity and technical configuration.
Yes. Usune can provide OEM and project-based customization, including specified component configurations and customer requirements.
Components and assembled cabinets are inspected during production, followed by routine inspection and testing before shipment. Relevant test documentation can be supplied according to the project requirements.
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No. 298, Wei 17th Road, Yueqing Economic Development Zone, Yueqing, Wenzhou City, Zhejiang Province, China
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