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central africa European-style packaged substation
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Product Description
Detailed content
I. Product Overview
A prefabricated substation (also known as a box-type substation or European-style box substation, commonly referred to as "European substation" or "Euro-substation") is a mobile, complete electrical distribution and transformation system pre-assembled in the factory. It consists of high- and low-voltage switchgear, transformers, and an enclosure. This type of substation is primarily designed to replace traditional, site-built substations, enabling efficient power transformation and distribution functions. It adheres to relevant standards such as GB17467 and IEC62271.
Prefabricated substations can be used both outdoors and indoors, making them widely applicable in industrial parks, residential communities, commercial centers, public venues, airports, ports, subway systems, hotels, schools, hospitals, as well as dynamic construction sites, mines, oil fields, and other settings. Depending on their specific application, they can also be categorized into products such as prefabricated substations for urban municipal lighting, those designed for rural grid upgrades, factory power distribution systems, nuclear power plants, wind farms, highways, seaports and docks, and even airport facilities.
II. Operating Environment Conditions
1. Altitude: Not exceeding 2000m;
2. Ambient temperature: Maximum air temperature +40℃
Minimum temperature: -25℃ (outdoor), -5℃ (indoor);
Maximum daily average temperature +30°C, maximum annual average temperature +20°C;
3. Relative Humidity: The daily average should not exceed 95%; the monthly average should not surpass 90%.
4. Ground slope: Not exceeding 3 degrees;
5. Earthquake Intensity: The horizontal seismic acceleration shall not exceed 0.4 m/s²
The vertical seismic acceleration shall not exceed 0.2 m/s².
6. Outdoor wind speed: not exceeding 35 m/s;
The installation location must be free from fire hazards, explosion risks, chemical corrosion, and severe vibrations.
▬▬▬ Negotiable products for use in special environments
III. Model Meaning
4. Main Technical Parameters
| Project | Unit | Parameters | ||||
| High-Voltage Unit | Rated frequency | HZ | 50 | |||
| Rated Voltage | kV | 6 | 10 | 20 | 35 | |
| Maximum Operating Voltage | kV | 7 | 12 | 24 | 40.5 | |
| Rated Current | A | 400, 630, 1250 | ||||
| Transfer current | A | 1200 to 20,000 | ||||
| Rated Short-Time Withstand Current | kA | 20 | 25 | 31.5 | 40 | |
| Rated Peak Withstand Current | kA | 50 | 63 | 80 | 100 | |
| Power-frequency withstand voltage | kV | 32/36 | 42/48 | 55/60 | 95/118 | |
| Ground and phase-to-phase/isolation break points | ||||||
| Lightning Impulse Withstand Voltage | kV | 60/70 | 75/85 | 95/110 | 185/215 | |
| Ground and phase-to-phase/isolation break points | ||||||
| Rated Short-Circuit Interrupting Current (Current-Limiting Fuse) | kA | 20, 25, 31.5, 40 (31.5) | ||||
| Breaking Capacity of No-Load Transformers | kVA | 2500 | ||||
| Transformer Unit | Rated Voltage | kV | 6 | 10 | 20 | 35 |
| Rated Capacity | kVA | 30 to 2500 | ||||
| Tap range | % | ±2 × 2.5%, ±5% | ||||
| Connection Group | Yyn0, Dyn11 | |||||
| Impedance Voltage | % | 4, 4.5, 6, 8 | ||||
| Low-pressure unit | Rated Voltage | V | 220, 380, 690, 1000 | |||
| Main circuit rated current | A | 50 to 4000 | ||||
| Branch current | A | 5 to 800 | ||||
| Main circuit rated short-time withstand current | kA | 15 (s), 30 (1s), 50 (1s), 65 (1s) | ||||
| Main circuit rated peak withstand current | kA | 30, 63, 110 | ||||
| Shell | Protection Rating (Standard Products) | IP | High-voltage room IP33; transformer room IP23; low-voltage room IP33, with enclosure housing rated IP34D | |||
| Noise Level | dB | ≤50 | ||||
| Shell Temperature Upgrade Level | 10K | |||||
V. Product Features
1. Overall Structural Features
- Feature-rich and reliable
It can interrupt short-circuit and load currents, providing full-range current protection. High-voltage options include ring main units (including dual-power supplies), terminal substations, and systems equipped with high-voltage metering—offering a variety of power supply configurations to choose from. Additionally, it features all the functionalities of a conventional civil-engineering-type substation.
- Low investment, minimal land use, and easy installation
Compact in structure, small in size, and requiring minimal floor space, it features an integrated multi-door design for convenient transportation, installation, operation, and maintenance. The overall European-style design primarily comes in three main configurations: the "目" (eye-shaped) integrated type, the "品" (character "pin") integrated type, and the split-type structure.
Saving money: Better than distribution transformers + The capital investment in the distribution room should be minimal;
Province-level: Small in size, occupying about the same space as a distribution transformer of comparable capacity. + The volume of the distribution room 1/3 Or even smaller;
Time-saving: Delivery can be arranged in less than a month, and on-site installation is simple—simply tighten the four mounting bolts and connect the incoming and outgoing cables.
- Good security
Featuring a fully enclosed design, the product casing is grounded, and its outer surface contains no live components whatsoever. As a result, no insulation distance is required, reliably ensuring personal safety.
2. Component and Part Selection
- Medium- and High-Voltage Equipment
a. Selection of Medium- and High-Voltage Switching Methods
Since circuit breakers primarily perform the functions of interrupting normal load currents and short-circuit currents, and they feature a high degree of automation, circuit breakers are therefore used as 800kVA User disconnection above the transformer is the preferred choice.
End users of the power system, especially 10kV Small and Medium-Sized Capacity 630kVA The high-voltage switches used by the following customers frequently handle normal load currents, and in most cases, load switches combined with fuses replace the main circuit breakers. Specifically, the high-voltage load switch is responsible for interrupting normal load currents, while the fuses take care of cutting off short-circuit currents.
b. Cabinet Type Selection
Medium- and high-voltage switchgear can be selected based on the specific application environment. XGN Fixed-type circuit breaker cabinet, KYN Armored withdrawable switchgear, HXGN Vacuum (air-compression type) load switchgear, SF6 Fully insulated sulfur hexafluoride switchgear, XGN15 Sulfur Hexafluoride Load Switchgear.
- Transformer
Available with various series of dry-type or oil-immersed transformers
- Low-voltage equipment
Our company's European transformers typically use GGD Series of fixed low-voltage switchgear, which can also be provided in a withdrawable design depending on specific product requirements. GCK 、 GCS 、 GCL 、 MNS Cabinet. GGD Cabinet features:
a. High maintainability , the cabinet base Based on component reliability and operability, low-voltage components are reasonably arranged for primarily front-side maintenance. Easily worn components such as low-voltage circuit breakers, disconnect switches, fuses, and contactors are all positioned at the front of the cabinet, ensuring convenient access for inspection and upkeep. Meanwhile, highly reliable components like copper busbars and insulators—which require minimal maintenance—are placed at the rear of the cabinet, reducing the need for routine servicing or upkeep.
b. Small size: Typically, the design of European-style circuits is relatively simple, allowing the accompanying low-voltage equipment to be integrated into a single European transformer unit. GGD When using dedicated cabinets, low-voltage electrical equipment can be arranged more efficiently, reducing the footprint of the low-voltage cabinet.
- Shell Types
Our company selects the enclosure for our European-style transformers based on the operating environmental conditions. Our transformer enclosures include cold-rolled steel sheets with coating, stainless steel sheets with coating, color-zinc composite panels, and non-metallic enclosures, among others.
6. Layout Configuration and Reference Overall Dimensions
YB The series of prefabricated substations are categorized into "U"-shaped and "Y"-shaped arrangements based on their layout.
1. Cross-shaped arrangement
2. V-shaped Layout
Floor plan: H— High-voltage room, T— Transformer room, L— Low-pressure Room
3. Reference to External Dimensions
The external dimensions must be flexibly designed according to the user's configuration plan.
7. Housing Selection
a. Stainless Steel Prefabricated Substation
Technical features:
1. Compact in structure and small in size, it features a unique外形 design that is both innovative and visually appealing.
2. Top-lifting method: Direct lifting
3. The top cover is A Type inclined-top structure, with strong heat dissipation capability
4. The built-in door lock features dustproof and rainproof functions, among others.
5. Surface is coated with UV-resistant topcoat for excellent weather resistance.
6. The high-voltage solution is flexible, suitable for both terminal applications and ring networks.
7. Low voltage can meet various wiring requirements, and relay protection offers flexible options.
b、 Prefabricated Substation with Composite Panels
Technical features:
1. Exhibits excellent mechanical properties, including bending resistance, impact resistance, and tensile strength.
2. Strong resistance to sun exposure, radiation, and excellent heat insulation
3. Possesses antifreeze, anti-cracking, and anti-corrosion properties
4. Moisture-resistant and flame-retardant, it is less likely to produce condensation even under fluctuating temperatures in both extremely cold and hot environments.
5. "All-weather" performance is robust and can harmonize with the surrounding environment.
c., Landscape-style Prefabricated Substation
Technical features:
1. Compact structure, small size
2. The high-voltage solution is flexible, suitable for both terminal applications and ring networks.
3. Low voltage can meet various wiring requirements, and relay protection is flexible and reliable.
4. Excellent insulation performance
5. The built-in door lock features dustproof and rainproof functions, among others.
Company Address:
No. 9 Qianfeng North Road, Shiji Town, Panyu District, Guangzhou City
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