33kV 630kVA Prefabricated Compact Substation
The 33kV 630kVA Prefabricated Compact Substation is a highly integrated medium-voltage power distribution solution designed for modern electrical infrastructure projects requiring reliable, space-saving, and efficient energy transformation. The substation combines 33kV medium-voltage switchgear, a 630kVA distribution transformer, low-voltage distribution panels, and intelligent protection systems within a compact outdoor enclosure, reducing installation complexity and minimizing civil construction requirements. Engineered for stable operation in demanding industrial and environmental conditions, the compact substation features a reinforced enclosure structure, advanced insulation technology, optimized ventilation systems, and corrosion-resistant surface treatment. The modular design improves transportation efficiency, shortens commissioning cycles, and simplifies future maintenance operations while ensuring long-term operational reliability. This 33kV 630kVA compact transformer substation is suitable for renewable energy integration, industrial facilities, mining operations, commercial developments, and urban utility distribution systems. Optional intelligent monitoring systems and remote communication interfaces support modern smart-grid applications and enable efficient power management for evolving electrical networks.
- Primary Voltage Ratings 33kV
- Type Prefabricated Substation
- BIL 630kVA
- Standards IEC, ASTM, UL
- Application remote mining sites, oil & gas exploration areas
- Certificate UL, CESI, IEEE
- Cooling Method ONAN
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
33kV 630kVA Prefabricated Compact Substation
33kV 630kVA Prefabricated Compact Substation Data Sheet
| Parameter | Specification |
| Product Type | Prefabricated Compact Substation |
| Rated Voltage | 33kV |
| Transformer Capacity | 630kVA |
| Low Voltage Output | 0.4kV / 0.415kV |
| Rated Frequency | 50Hz / 60Hz |
| Transformer Type | Oil-Immersed / Dry-Type Optional |
| Cooling Method | ONAN |
| Vector Group | Dyn11 |
| HV Switchgear Type | RMU / VCB Optional |
| Rated Short Circuit Current | 25kA |
| Protection Degree | IP44 / IP54 |
| Insulation Level | 170kV BIL |
| Busbar Material | Copper / Aluminum |
| Enclosure Material | Galvanized Steel / Stainless Steel |
| Surface Treatment | Outdoor Powder Coating |
| Ambient Temperature | -35°C to +50°C |
| Altitude | ≤ 3000m |
| Noise Level | ≤ 58dB |
| Ventilation Method | Natural / Forced Ventilation |
| Communication Protocol | Modbus / IEC 61850 |
| SCADA Compatibility | Supported |
| Grounding System | TN-S / TT |
| Cable Entry | Bottom / Side |
| Service Life | More than 30 Years |
| Applicable Standards | IEC 62271 / IEC 60076 |
Customization Optional
33kV 630kVA Prefabricated Compact Substation
The 33kV 630kVA Prefabricated Compact Substation can be customized according to project-specific electrical requirements, environmental conditions, and regional utility standards. Customers may choose different transformer technologies including high-efficiency oil-immersed transformers, cast resin dry-type transformers, or energy-saving amorphous alloy transformer configurations depending on installation location and operational objectives. Medium-voltage sections can be configured with ring main units, vacuum circuit breakers, load break switches, or gas-insulated switchgear systems to support different protection philosophies and grid structures. The low-voltage compartment can additionally integrate intelligent energy meters, automatic transfer systems, capacitor compensation devices, harmonic filtering equipment, and digital protection relays for advanced electrical management applications.
The enclosure structure and internal layout can also be optimized for coastal, desert, mining, tropical, or high-pollution industrial environments. Optional configurations include anti-condensation heaters, arc fault protection systems, thermal insulation layers, remote monitoring modules, intelligent temperature control systems, fire suppression systems, and integrated SCADA communication interfaces. Customers may further customize cable entry orientation, ventilation structures, paint colors, company branding, maintenance access doors, lighting systems, and renewable energy integration functions to improve operational convenience and installation flexibility. These customization capabilities ensure the compact substation can fully adapt to complex utility, commercial, and industrial power distribution applications.
Packing and Shipping
33kV 630kVA Prefabricated Compact Substation
The 33kV 630kVA Prefabricated Compact Substation is packaged using reinforced industrial export protection methods to ensure safe transportation and long-term storage under demanding international logistics conditions. Prior to packaging, the complete substation undergoes cleaning, structural inspection, coating verification, and anti-corrosion treatment to minimize the risk of surface damage, moisture exposure, or contamination during shipment. Electrical components including protection relays, intelligent monitoring devices, meters, and control systems are additionally protected using shock-resistant and moisture-proof materials.
The transformer compartment, medium-voltage switchgear section, and low-voltage distribution chamber are internally reinforced using heavy-duty support structures to prevent movement and vibration during road transportation, railway shipment, or container loading operations. External surfaces are wrapped with waterproof industrial protection film, reinforced corner guards, and anti-scratch protective layers to maintain enclosure integrity throughout long-distance transportation. Integrated lifting lugs and forklift channels are designed to simplify loading, unloading, and installation procedures at ports and project sites.
For overseas delivery, the compact substation may be shipped using steel-frame packaging, fumigation-free export wooden crates, skid-mounted transportation systems, or direct container securing methods depending on equipment dimensions and customer logistics requirements. Additional anti-condensation packaging solutions, anti-vibration reinforcement systems, and salt spray protection measures are available for projects located in marine environments, tropical regions, desert climates, or remote installation locations with extended transportation durations.
Shipping documentation typically includes factory inspection reports, electrical schematics, operation manuals, packing lists, wiring diagrams, warranty certificates, and export compliance documents. Customers may also request multilingual labels, customized shipping marks, installation guidance documentation, and project-specific logistics coordination support. The complete packing and shipping process is designed to preserve equipment quality, simplify international customs clearance, and ensure safe delivery to the final installation site.
The transformer compartment, medium-voltage switchgear section, and low-voltage distribution chamber are internally reinforced using heavy-duty support structures to prevent movement and vibration during road transportation, railway shipment, or container loading operations. External surfaces are wrapped with waterproof industrial protection film, reinforced corner guards, and anti-scratch protective layers to maintain enclosure integrity throughout long-distance transportation. Integrated lifting lugs and forklift channels are designed to simplify loading, unloading, and installation procedures at ports and project sites.
For overseas delivery, the compact substation may be shipped using steel-frame packaging, fumigation-free export wooden crates, skid-mounted transportation systems, or direct container securing methods depending on equipment dimensions and customer logistics requirements. Additional anti-condensation packaging solutions, anti-vibration reinforcement systems, and salt spray protection measures are available for projects located in marine environments, tropical regions, desert climates, or remote installation locations with extended transportation durations.
Shipping documentation typically includes factory inspection reports, electrical schematics, operation manuals, packing lists, wiring diagrams, warranty certificates, and export compliance documents. Customers may also request multilingual labels, customized shipping marks, installation guidance documentation, and project-specific logistics coordination support. The complete packing and shipping process is designed to preserve equipment quality, simplify international customs clearance, and ensure safe delivery to the final installation site.
32
32 years of industry experience
Manufacturer Test
33kV 630kVA Prefabricated Compact Substation
Progress Test
The manufacturing progress testing procedure for the 33kV 630kVA Prefabricated Compact Substation is implemented throughout all major production stages to ensure structural integrity, electrical reliability, and assembly precision. Initial inspections focus on raw material verification including enclosure steel thickness measurement, insulation material testing, copper busbar conductivity inspection, and anti-corrosion coating evaluation to confirm compliance with engineering specifications and international quality standards. Electrical progress testing includes insulation resistance measurement, contact resistance testing, breaker mechanical operation verification, relay configuration inspection, and low-voltage functional simulations. Transformer winding resistance, tap changer functionality, and control circuit logic are also tested to confirm stable operational performance under rated load conditions. Communication interfaces and intelligent monitoring systems are evaluated to verify data transmission accuracy and system integration capability.
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 Factory Acceptance Test for the 33kV 630kVA Prefabricated Compact Substation transformer is conducted to verify electrical performance, insulation reliability, and operational safety before shipment. All testing procedures are carried out using calibrated instruments and standardized inspection protocols in accordance with IEC, IEEE, ANSI, and customer-specific technical requirements. Routine electrical tests include transformer ratio verification, winding resistance measurement, vector group confirmation, insulation resistance testing, induced voltage testing, and applied voltage withstand testing. These procedures ensure proper voltage transformation accuracy, winding integrity, and insulation system performance under rated operating conditions. No-load loss measurements and excitation current analysis are additionally conducted to evaluate transformer efficiency and magnetic circuit stability.
Routine Test - DC Insulation Resistance Test
Purpose of Testing
The purpose of DC insulation resistance testing is to measure the insulation resistance of a device by applying a DC voltage, thereby evaluating the health of the insulation material and the voltage withstand capability of the electrical device. This test helps detect potential insulation aging, moisture or damage, preventing electrical failures in the device.
Testing Equipment
Insulation resistance tester (e.g. Megger, Fluke, Hioki, Klein Tools, etc.)
Voltage source (usually 500V, 1000V, 2500V, or customized according to customer requirements)
Temperature and humidity meter (used to record the ambient temperature and humidity during the test to ensure that the test conditions meet the standard requirements.)
Voltage source (usually 500V, 1000V, 2500V, or customized according to customer requirements)
Temperature and humidity meter (used to record the ambient temperature and humidity during the test to ensure that the test conditions meet the standard requirements.)
Pre-Test Preparation
Make sure the device is properly grounded and fully discharged to prevent residual charge in the device from affecting the test results.
Perform the test under suitable environmental conditions. It is recommended to have a relative humidity below 75%, no rain, and a temperature range of 20-30°C to avoid moisture or temperature fluctuations affecting the test results.
Perform the test under suitable environmental conditions. It is recommended to have a relative humidity below 75%, no rain, and a temperature range of 20-30°C to avoid moisture or temperature fluctuations affecting the test results.
Test Progress
Connect the Test Instrument:
Connect an insulation resistance tester to the high voltage terminal of the device under test and to ground.
Apply Test Voltage:
Select an appropriate test voltage based on the rated voltage of the equipment .
Connect an insulation resistance tester to the high voltage terminal of the device under test and to ground.
Apply Test Voltage:
Select an appropriate test voltage based on the rated voltage of the equipment .
Measure and Record
Start the test and record the following parameters:
Insulation resistance value (MΩ)
Applied voltage
Ambient temperature and humidity during testing
Insulation resistance value (MΩ)
Applied voltage
Ambient temperature and humidity during testing
Temperature Correction
The measured insulation resistance values are corrected to a reference temperature (usually 20°C) for accurate evaluation.
Repeat Testing (if necessary)
Measure different windings (high voltage, medium voltage, low voltage) or each bushing separately, and conduct comparative analysis to ensure the insulation status of all parts.
Evaluation Criteria (Reference)
Insulation resistance ≥ 1000 MΩ (excellent)
500 MΩ ≤ Insulation resistance < 1000 MΩ (good)
100 MΩ ≤ Insulation resistance < 500 MΩ
Insulation resistance < 100 MΩ
500 MΩ ≤ Insulation resistance < 1000 MΩ (good)
100 MΩ ≤ Insulation resistance < 500 MΩ
Insulation resistance < 100 MΩ
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
Suitable for photovoltaic power stations, wind energy farms, industrial manufacturing plants, mining facilities, commercial complexes, urban distribution systems, transportation infrastructure, and municipal utility power networks.
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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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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