What Is 2750kVA Prefabricated Compact Substation Transformer?

What Is 2750kVA Prefabricated Compact Substation Transformer?

A 2750kVA prefabricated compact substation transformer is a factory-integrated, containerized power distribution unit. It adopts independent compartment layout and generally matches 10kV high-voltage incoming and 0.4kV low-voltage output systems.
Different from discrete power distribution equipment, all functional parts are installed within a sealed container enclosure. After finished factory testing, customers only need to complete on-site foundation construction and cable connection to realize rapid power transmission. It can be configured with oil-immersed transformers or dry-type transformers to meet different environmental and safety requirements.

Key Performance & Technical Advantages

1. High Safety and Operational Reliability Independent partition design effectively prevents fault spread. The whole set is equipped with multi-level electrical protection, reliable grounding system and sealed cabinet body to avoid safety hazards caused by external environmental interference.
2. Flexible Environmental Adaptability Customers can select dry-type transformers to eliminate insulating oil leakage risks for densely populated areas. Anti-corrosion coating, heating and dehumidification systems can be customized for coastal humid, high-temperature or low-temperature regions.
3. Low Operation and Maintenance Costs Standardized internal layout and external maintenance mesh doors facilitate daily inspection and component replacement. Integrated structure reduces routine maintenance workload and long-term operating expenditure.
4. Fast On-site Installation & Commissioning Most assembly and debugging work is completed in GNEE Electric’s workshop. Compared with traditional substations, the construction period is significantly shortened, supporting projects to be put into operation quickly.

5. Cabinet Housing Advantages

   Robust corrugated steel container enclosure with rainproof sealing and anti-corrosion coating, adapting to long-term outdoor installation.
   Modular factory prefabrication. All assemblies complete testing before shipment; only foundation work and cable connection are required on site.
   Space-saving layout, greatly reducing land occupation compared with conventional civil-built substations.

Core Structure & Internal Components of 2750kVA Containerized Compact Substation

The 2750kVA prefabricated compact substation features a container-style fully enclosed modular housing. All power distribution assemblies are pre-mounted, wired and fully tested inside the enclosure in our factory. The complete unit is divided into four independent functional compartments:

1. High Voltage Switchgear Compartment It is equipped with ring main unit (RMU), load break switches, high voltage fuses, measuring components and grounding protection systems, responsible for power incoming control, circuit switching and primary electrical isolation.
2. 2750kVA Main Transformer Compartment This area accommodates the core 2750kVA step-down transformer (oil immersed or dry type optional). Ventilated mesh double doors, temperature sensors and over-temperature protection devices are configured to ensure reliable heat dissipation under continuous full-load operation.
3. Low Voltage Distribution Compartment Fitted with low voltage main incoming cabinet, outgoing feeders, reactive power compensation capacitor banks, circuit breakers and energy metering modules. It performs secondary power distribution, power factor adjustment and terminal load management.
4. Auxiliary Control Compartment Integrates intelligent monitoring unit, protection relays, cabinet lighting, heater and dehumidifier. It enables real-time operation data monitoring, remote communication and anti-condensation protection for outdoor working conditions.

2750kVA 10kV/0.4kV Oil-Immersed Distribution Transformer Specification Table

Item	Technical Parameter
Model Type	S11-M-2750 / S13-M-27503-phase fully sealed oil immersed transformer
Rated Capacity	2750 kVA
Voltage Combination	HV: 10kV (10.5kV /11kV optional)LV: 0.4kVHV tapping range: ±2×2.5% / ±5%
Connection Group	Dyn11 (default) / Yyn0
Frequency	50Hz (60Hz customized for American market)
No-load LossS11-MS13-M	≤ 2550 W≤ 2050 W
Load Loss (120℃)S11-MS13-M	≤ 23800 W≤ 23100 W
No-load Current	≤ 0.45 %
Short-circuit Impedance	6.0 % (default)
Cooling Method	ONAN (Oil Natural Air Natural)
Winding Material	Copper winding (Standard GNEE configuration)Aluminum winding (optional low-cost solution)
Noise Level	≤ 58 dB
Approximate Overall Dimension(L × W × H)	3650 × 1680 × 2420 mm
Approximate Weight	Total weight: ~12800 kgTransformer oil weight: ~2300 kg
Applicable Standards	GB 1094, GB/T6451, IEC 60076
Service Condition	Altitude ≤1000mAmbient temperature: -25℃ ~ +40℃
Protection Accessory	Oil level gauge, temperature sensor, pressure relief valve, drain valve

Main Application Scenarios of 2750kVA Prefabricated Substation

• Medium and large industrial parks, manufacturing factory centralized power distribution
• Large commercial complexes, urban residential communities
• Photovoltaic power stations, wind farm booster and distribution supporting equipment
• Municipal infrastructure and temporary large-capacity power supply projects
• All power supply projects with limited construction land and tight construction schedules

2750kVA Compact Substation vs Traditional Civil Substation

Comparison Item	2750kVA Containerized Compact Substation	Traditional Civil-built Substation
Floor Area	Only occupies 1/3 ~ 1/2 land space of civil substations, space-saving layout	Requires large land area for brickwork construction
Construction Cycle	Greatly shortened; most assembly & testing finished in factory	Long cycle, includes civil construction, separate equipment installation & on-site wiring
Total Investment	Lower overall expenditure, eliminates high civil engineering costs	High comprehensive investment for foundation, building construction and decoration
Mobility	Entire unit can be relocated to other sites when project planning adjusts	Fixed building structure, impossible to move after completion
Environmental Impact	Minimal on-site construction waste and pollution	Generates large amounts of construction waste, longer on-site construction work

Why Choose GNEE Electric 2750kVA Compact Transformer Substation

1. Customizable solutions: We support personalized configuration of transformers, switchgears, monitoring systems and container protection according to project site conditions.
2. Strict full-range quality control: Each set completes systematic factory testing before shipment.
3. Factory direct supply: Competitive prices and stable delivery schedule for bulk engineering orders.
4. Professional technical support: Our electrical engineering team provides early-stage scheme consultation, technical parameter confirmation and installation guidance.
5. Complete after-sales service: Reasonable product warranty and rapid overseas technical support.
6. Standard Compliance & Quality Assurance：GNEE Electric’s 2750kVA compact substations comply with international IEC standards and relevant domestic GB specifications. Before delivery, every unit will undergo strict testing including insulation test, full-load operation test, protection function calibration and sealing inspection. Stable quality ensures long-term continuous outdoor operation for global engineering projects.

The 2750kVA prefabricated compact substation transformer has become an essential power distribution equipment for modern power grids. Its prominent strengths of small footprint, fast deployment, flexible configuration and low maintenance perfectly match the demands of new energy, industry and urban construction projects.
If you are sourcing qualified 2750kVA container compact substations or need customized power distribution solutions, feel free to contact GNEE Electric for technical data sheets and formal quotations.

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