11kV 800kVA Prefabricated Compact Substation
The 11kV 800kVA Prefabricated Compact Substation is an advanced integrated power distribution system designed to provide safe, efficient, and reliable medium-voltage to low-voltage energy transformation for industrial, commercial, and infrastructure applications. The substation integrates 11kV medium-voltage switchgear, an 800kVA distribution transformer, low-voltage distribution equipment, and intelligent protection systems into a compact outdoor enclosure, significantly reducing installation space and on-site construction requirements. Built for continuous operation in demanding environments, the compact substation features a durable weather-resistant enclosure, optimized thermal ventilation structure, high-performance insulation system, and reinforced electrical safety protection. Its modular architecture simplifies transportation, accelerates installation, and minimizes maintenance complexity while ensuring stable long-term operational performance. The 11kV 800kVA compact transformer substation is suitable for utility distribution systems, renewable energy integration, manufacturing facilities, commercial complexes, and urban electrical infrastructure projects. With optional intelligent monitoring and remote communication functions, the substation supports modern smart-grid applications and improves operational efficiency across distributed power networks.
- Primary Voltage Ratings 11kV
- Type Prefabricated Substation
- BIL 800kVA
- Standards IEC, ASTM, UL
- Application hospitals, railway systems, ports, data centers
- Certificate UL, CESI, IEEE
- Cooling Method AN / ONAN / ONAF
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
11kV 800kVA Prefabricated Compact Substation
11kV 800kVA Prefabricated Compact Substation Data Sheet
| Parameter | Specification |
| Product Name | Prefabricated Compact Substation |
| Rated High Voltage | 11kV |
| Transformer Capacity | 800kVA |
| Rated Low Voltage | 400V / 415V |
| Rated Frequency | 50Hz / 60Hz |
| Transformer Cooling Method | ONAN |
| Transformer Type | Oil-Immersed |
| Vector Group | Dyn11 |
| HV Switchgear Configuration | RMU / Vacuum Circuit Breaker |
| Rated Short Circuit Current | 20kA |
| Rated Current | 630A |
| Insulation Level | 75kV BIL |
| Enclosure Protection Class | IP44 / IP54 |
| Enclosure Material | Galvanized Steel / Stainless Steel |
| Surface Finish | Outdoor Powder Coating |
| Busbar Material | Copper |
| Ventilation Method | Natural / Forced Air |
| Operating Temperature | -30°C to +50°C |
| Installation Altitude | ≤ 2000m |
| Communication Protocol | Modbus RTU / IEC 61850 |
| Remote Monitoring | Optional SCADA Integration |
| Grounding System | TN-S / TT |
| Cable Entry Type | Bottom Entry |
| Noise Level | ≤ 60dB |
| Service Life | ≥ 30 Years |
| Compliance Standards | IEC 62271 / IEC 60076 |
Customization Optional
11kV 800kVA Prefabricated Compact Substation
The 11kV 800kVA Prefabricated Compact Substation can be customized according to utility requirements, project operating conditions, and regional electrical standards. Customers may choose different transformer technologies including low-loss oil-immersed transformers, dry-type transformers, or environmentally friendly energy-efficient transformer designs depending on project efficiency objectives and installation environments. Medium-voltage compartments can be configured with ring main units, vacuum circuit breakers, SF6 insulated switchgear, or load break switch systems to support different power distribution architectures and protection requirements. The low-voltage section can additionally integrate automatic transfer switches, intelligent energy metering systems, harmonic suppression equipment, capacitor compensation units, and advanced digital protection relays for modern intelligent power management applications.
The enclosure and structural design can also be optimized for coastal, tropical, desert, mining, or high-pollution industrial environments. Optional configurations include anti-condensation heaters, thermal insulation layers, intelligent ventilation systems, remote monitoring interfaces, internal LED lighting systems, fire suppression systems, and arc fault protection devices. Customers may further customize dimensions, cable entry orientation, access door structures, paint color, ventilation arrangement, company branding, and renewable energy integration capability to improve installation flexibility and operational efficiency. These flexible customization solutions ensure the compact substation can fully satisfy industrial, commercial, infrastructure, and renewable energy power distribution applications.
Packing and Shipping
11kV 800kVA Prefabricated Compact Substation
The 11kV 800kVA Prefabricated Compact Substation is packaged using industrial export-grade protection methods to ensure safe transportation, long-term storage, and secure international shipment. Before packaging, the entire substation undergoes comprehensive cleaning, mechanical inspection, coating verification, and anti-corrosion treatment to protect the enclosure and internal electrical components from environmental exposure and transportation damage. Sensitive devices including relays, intelligent monitoring systems, meters, and communication modules are additionally secured using moisture-proof and vibration-resistant protective materials.
The transformer chamber, medium-voltage switchgear compartment, and low-voltage distribution section are internally reinforced using heavy-duty support structures to minimize vibration and movement during road transportation, railway shipment, or container loading operations. External surfaces are protected with industrial waterproof wrapping film, anti-scratch protective layers, reinforced corner guards, and heavy-duty fastening systems to maintain structural integrity during long-distance transportation. Integrated lifting lugs and forklift channels are designed to improve loading efficiency and simplify unloading operations at project sites and logistics terminals.
Depending on project requirements and shipping destinations, the compact substation can be transported using steel-frame packaging, skid-mounted structures, fumigation-free export wooden crates, or direct container fastening methods compliant with international transportation standards. Additional anti-condensation protection, anti-vibration reinforcement systems, and marine-grade salt spray protection measures are available for projects located in coastal areas, tropical climates, mining regions, or remote installation environments requiring extended transportation durations.
Shipping documentation generally includes factory inspection certificates, wiring diagrams, operation manuals, packing lists, electrical schematics, quality inspection reports, and export compliance certifications. Customers may additionally request multilingual labels, customized shipping marks, installation guidance documents, and project-specific logistics coordination services. The complete packing and shipping procedure is designed to preserve equipment reliability, reduce transportation risks, and ensure safe delivery to the final installation location.
The transformer chamber, medium-voltage switchgear compartment, and low-voltage distribution section are internally reinforced using heavy-duty support structures to minimize vibration and movement during road transportation, railway shipment, or container loading operations. External surfaces are protected with industrial waterproof wrapping film, anti-scratch protective layers, reinforced corner guards, and heavy-duty fastening systems to maintain structural integrity during long-distance transportation. Integrated lifting lugs and forklift channels are designed to improve loading efficiency and simplify unloading operations at project sites and logistics terminals.
Depending on project requirements and shipping destinations, the compact substation can be transported using steel-frame packaging, skid-mounted structures, fumigation-free export wooden crates, or direct container fastening methods compliant with international transportation standards. Additional anti-condensation protection, anti-vibration reinforcement systems, and marine-grade salt spray protection measures are available for projects located in coastal areas, tropical climates, mining regions, or remote installation environments requiring extended transportation durations.
Shipping documentation generally includes factory inspection certificates, wiring diagrams, operation manuals, packing lists, electrical schematics, quality inspection reports, and export compliance certifications. Customers may additionally request multilingual labels, customized shipping marks, installation guidance documents, and project-specific logistics coordination services. The complete packing and shipping procedure is designed to preserve equipment reliability, reduce transportation risks, and ensure safe delivery to the final installation location.
32
32 years of industry experience
Manufacturer Test
11kV 800kVA Prefabricated Compact Substation
Progress Test
The 11kV 800kVA Prefabricated Compact Substation undergoes a multi-stage progress testing procedure designed to maintain strict manufacturing consistency and dependable long-term performance. The testing process begins with enclosure structural verification, transformer tank inspection, coating thickness analysis, and dimensional tolerance measurement to ensure mechanical strength and environmental durability under outdoor operating conditions. Electrical verification procedures include dielectric testing, control circuit simulation, relay protection logic testing, breaker synchronization inspection, and communication protocol verification. Functional simulations are performed to evaluate substation response under overload, short-circuit, grounding fault, and emergency shutdown conditions. Transformer accessories such as oil level indicators, thermal alarms, pressure relief devices, and fault warning systems are additionally tested for reliable operational performance.
Design Tests
All transformers will be tested after finishing the production, test items as follows:
♦ Insulation Power Factor
♦ Ratio, Polarity, and Phase Relation
♦ Winding Resistance
♦ Impulse Tests
♦ On load Loss Test
♦ No Load Loss Test
♦ Transformer Turns Ratio/TTR (All Tap Voltages)
♦ Impedance Voltage & Load Loss (Rated Voltage)
♦ Polarity, 1-Ph / Phase Relation, 3-Ph (Rated Voltage)
♦ Excitation & No-Load Loss (Rated Voltage)
♦ Applied Voltage
♦ Induced Voltage
♦ Lightning Impulse
♦ Insulation Resistance (Rated Voltage)
♦ Temperature Rise
♦ Dielectric Withstand (Hipot)
Factory Acceptance Test
The transformer Factory Acceptance Test program for the 11kV 800kVA Prefabricated Compact Substation is designed to guarantee manufacturing quality consistency and reliable field operation in utility and industrial electrical systems. The testing procedure begins with visual inspections and dimensional verification of the transformer tank, bushings, cooling radiators, grounding terminals, enclosure coating quality, and auxiliary device installation to ensure conformity with approved engineering drawings. Protective devices and auxiliary systems including pressure relief valves, oil level indicators, Buchholz relays, thermal protection devices, alarm systems, and cooling fans are functionally tested to verify reliable operation during abnormal electrical conditions. Intelligent communication modules, SCADA interfaces, and remote monitoring systems are also tested for projects requiring digital power management and smart-grid integration functionality.
Routine Test - Transformer Turns Ratio/TTR (All Tap Voltages)
Purpose of Testing
The purpose of the transformer turns ratio (TTR) test is to confirm whether the voltage ratio between each tap of the transformer meets the design requirements and ensure that the transformer winding is connected correctly. By measuring the voltage ratio of each tap, it is possible to detect whether there is a fault or deviation in the transformer winding.
Testing Equipment
TTR tester: such as Doble, Megger, Omicron and other brands of transformer winding ratio tester.
Voltage source: usually AC 10 V to 30 V , used to test different voltages for each tap.
Temperature and humidity meter: used to record environmental conditions during the test to ensure test accuracy.
Current probe: used to measure the load current of the winding and ensure the accuracy of the test results.
Voltage source: usually AC 10 V to 30 V , used to test different voltages for each tap.
Temperature and humidity meter: used to record environmental conditions during the test to ensure test accuracy.
Current probe: used to measure the load current of the winding and ensure the accuracy of the test results.
Pre-Test Preparation
Disconnect all transformer tap-changers from the power supply and ensure that all equipment is properly grounded and discharged.
Perform the test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20-30°C). Avoid high humidity or bad weather that may affect the test accuracy.
Perform the test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20-30°C). Avoid high humidity or bad weather that may affect the test accuracy.
Test Progress
Perform the test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20-30°C). Avoid high humidity or bad weather that may affect the test accuracy.
Measure and Record
Start the test and record the following parameters:
The voltage ratio between the windings
Deviation of the measured value from the rated ratio
The voltage ratio between the windings
Deviation of the measured value from the rated ratio
Temperature Correction
If necessary, perform temperature correction on the measured turns ratio data (especially when testing at higher or lower temperatures). Generally, the standard reference temperature for temperature correction is 20°C.
Repeat Testing (if necessary)
Test the transformer's windings of different voltage levels (high voltage, medium voltage, and low voltage) separately to ensure that the turns ratios of all windings are normal.
Evaluation Criteria (Reference)
Turns ratio error ≤ 0.5% (pass)
0.5% < Turns ratio error ≤ 1% (caution)
Turns ratio error > 1% (further inspection or corrective action required)
0.5% < Turns ratio error ≤ 1% (caution)
Turns ratio error > 1% (further inspection or corrective action required)
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
Suitable for industrial factories, shopping malls, photovoltaic power plants, urban utility networks, commercial buildings, mining operations, transportation infrastructure, and municipal electrical distribution projects.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
Transformers Packaging (1)
Transformers Packaging (2)
Transformers Packaging (3)
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Transformers Packaging (8)
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Prefabricated Compact Substation
The Prefabricated Compact Substation is an integrated medium-voltage and low-voltage power distribution solution engineered for modern urban infrastructure, renewable energy systems, industrial plants, and commercial facilities. The equipment combines medium-voltage switchgear, distribution transformer, and low-voltage distribution panel into a compact steel enclosure, significantly reducing installation time and site construction costs while improving operational reliability.Designed for outdoor operation under demanding environmental conditions, the compact substation features corrosion-resistant housing, advanced insulation systems, and optimized ventilation structures to ensure stable long-term performance. Its modular architecture allows flexible transformer capacities, voltage combinations, and protection configurations to meet different regional grid requirements and project specifications. The unit supports fast deployment, simplified maintenance, and enhanced safety protection, making it an ideal choice for power utilities, solar farms, wind power stations, transportation infrastructure, data centers, and residential developments. With intelligent monitoring options and customizable internal layouts, the prefabricated compact substation provides efficient, safe, and scalable electrical distribution for modern power networks.FAQ From Customers
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What is a Transformer?A transformer is an electrical device used to change the voltage of alternating current (AC). It works on the principle of electromagnetic induction, converting high-voltage current into low-voltage current or low-voltage current into high-voltage current. Transformers are widely used in power transmission, distribution systems, and various electronic devices.
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What are the main uses of a transformer?The main use of a transformer is voltage conversion. Transformers are used in power transmission systems to help transfer electricity from power plants to consumers. In addition, transformers are also used in electronic devices such as chargers, televisions, power adapters, etc., to adjust the voltage to meet the requirements of different devices.
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Do you have UL listed?Yes, our transformer has UL listed. We have exported to America many pad mounted transformer,substation transformer and HV.
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