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S-M-5040
YAWEI
The 5040kVA 12.47kV/480V Oil Immersed Three Phase Distribution Transformer is designed for medium-voltage power distribution in industrial plants, commercial facilities, utility networks, and large electrical installations. With a rated capacity of 5040kVA, a primary voltage of 12.47kV, and a secondary voltage of 480V, the transformer steps down medium-voltage power to provide a stable low-voltage supply for downstream equipment and distribution systems.
The transformer is manufactured with a cold-rolled grain-oriented silicon steel (CRGO) core and copper windings, providing reliable electrical performance and mechanical strength. The oil immersed construction provides insulation and effective heat dissipation for the core and windings. An ONAN (Oil Natural Air Natural) cooling system can be used for natural heat transfer during normal operation.
The transformer can be configured according to project requirements, including tap arrangements, vector group, short-circuit impedance, protection devices, temperature monitoring, oil level indication, pressure relief equipment, and other accessories. It is suitable for applications requiring dependable 12.47kV to 480V power transformation and distribution.
The transformer is equipped with a CRGO silicon steel magnetic core and copper windings. The core and winding design is optimized to achieve stable electrical performance while controlling no-load and load losses.
The active-part structure is engineered with suitable insulation clearances and mechanical support to maintain reliable operation under normal load conditions. The winding arrangement also provides effective heat transfer to the surrounding insulating oil.
With a rated capacity of 5040kVA, this transformer is designed for electrical systems requiring a high-capacity low-voltage power supply from a 12.47kV medium-voltage source.
The 12.47kV to 480V voltage conversion makes the transformer suitable for industrial facilities, commercial buildings, utility distribution systems, manufacturing plants, and other installations with substantial electrical loads.
The connection group, impedance, tap range, and other electrical parameters can be configured according to the requirements of the customer's power system.
The transformer can adopt an ONAN (Oil Natural Air Natural) cooling arrangement. During operation, the insulating oil naturally circulates inside the tank, transferring heat generated by the core and windings to the tank walls and external cooling surfaces.
The natural cooling configuration has a relatively simple structure and reduces the need for auxiliary cooling equipment, making it suitable for continuous operation under normal rated conditions.
The oil immersed construction provides electrical insulation as well as heat transfer for the transformer's active components. The insulation system is designed according to the 12.47kV/480V voltage levels and the applicable technical requirements.
The transformer can be supplied with suitable insulating oil, insulation materials, bushings, and other components according to the required insulation level and project specifications.
The transformer tank and internal active-part assembly are designed to provide adequate mechanical strength during transportation, installation, and normal operation.
The specified transformer impedance can be coordinated with the customer's electrical system and considered during fault-current calculations and downstream protection coordination. The overall construction is designed to provide stable performance under normal operating conditions.
Depending on the project specification, the transformer can be equipped with various protection and monitoring devices, including:
Oil temperature indicator
Winding temperature indicator
Oil level indicator
Pressure relief device
Buchholz relay, where applicable
Oil drain and sampling valves
Surge protection
Overcurrent and short-circuit protection
Optional transformer monitoring system
The final protection and monitoring configuration can be selected according to the installation environment, operating conditions, and customer's electrical protection scheme.
The 5040kVA 12.47kV/480V Oil Immersed Three Phase Distribution Transformer can be configured according to the specific requirements of different power distribution projects.
Available configurations may include:
Different tap ranges and tap changer arrangements
Customized vector groups
Specified short-circuit impedance
Copper or aluminum windings according to specification
Different cooling configurations
Temperature monitoring systems
Oil level and pressure monitoring
Conservator tank and radiator arrangements
Additional protection and control accessories
The main technical parameters can be reviewed and confirmed during the engineering design, technical clarification, and drawing approval stages to ensure compatibility with the customer's power distribution system.
>> Technical Parameters
| Type | Three Phase Oil-immersed Distribution Transformer |
| Model | S-M-5040 |
| Installation | Outdoor |
| Altitude | ≤1000m |
| Rated Power | 5040KVA or others |
| Cooling Method | ONAN/KNAN |
| Primary Voltage | 12.47KV |
| Secondary Voltage | 0.48kV or customizable |
| Rated Frequence | 50/60Hz |
| Insulation oil | Mineral oil |
| Tapping Range | +2×2.5% |
| Temperature rise C | 65 |
| Connection Group | Dyn11 |
The 5040kVA 12.47kV/480V Oil Immersed Three Phase Distribution Transformer is designed for factories, manufacturing plants, processing facilities, industrial parks, and other installations with substantial electrical demand. It converts 12.47kV medium-voltage power to 480V for production machinery, motors, pumps, compressors, and auxiliary electrical systems. The oil immersed construction provides insulation and heat dissipation for continuous operation under normal industrial loading conditions.
The transformer is suitable for large commercial buildings, shopping centers, hotels, office complexes, and other facilities requiring a high-capacity 480V power supply. It can provide power for HVAC systems, elevators, pumps, lighting, fire protection equipment, and other building services through a properly designed low-voltage distribution system.
With a 12.47kV primary voltage and 480V secondary voltage, the transformer can be used in local substations and distribution systems where medium-voltage power needs to be converted for downstream low-voltage loads. Its 5040kVA capacity makes it suitable for utility distribution, commercial developments, infrastructure projects, and other high-demand electrical installations.
The transformer can be integrated into solar PV, battery energy storage, distributed generation, and other renewable energy projects requiring voltage conversion between medium-voltage and low-voltage systems. The transformer configuration can be selected according to the project's voltage levels, connection requirements, protection scheme, and operating conditions.
The 5040kVA 12.47kV/480V transformer can be used for water treatment plants, transportation facilities, public buildings, schools, hospitals, and other infrastructure projects requiring dependable power distribution. Temperature monitoring, oil level indication, pressure relief, and other protection or monitoring equipment can be provided according to project requirements.
The 480V secondary output is suitable for electrical systems supplying motors, pumps, compressors, production lines, HVAC equipment, and other industrial loads. Transformer parameters can be coordinated with downstream switchgear, motor control centers, VFDs, protection equipment, and low-voltage distribution systems to support the requirements of the complete electrical installation.
The 5040kVA 12.47kV/480V Oil Immersed Three Phase Distribution Transformer is well suited to manufacturing facilities, processing plants, industrial parks, and other sites with high electrical demand. It converts 12.47kV medium-voltage power into 480V low-voltage power for motors, pumps, compressors, production equipment, and plant auxiliary systems. Its oil immersed design provides both electrical insulation and heat transfer for reliable day-to-day operation.
This transformer can serve large commercial and building projects that require a dependable 480V distribution system. Typical applications include shopping centers, hotels, office buildings, warehouses, and mixed-use facilities. The 480V output can supply HVAC equipment, elevators, pumps, lighting, fire protection systems, and other building loads through suitable downstream distribution equipment.
The transformer provides a 12.47kV to 480V voltage conversion solution for local substations and electrical distribution networks. It can be installed in commercial developments, infrastructure projects, utility facilities, and other locations where medium-voltage power must be converted for local low-voltage consumption. The 5040kVA rated capacity provides substantial power for centralized distribution applications.
The transformer can be incorporated into solar photovoltaic systems, battery energy storage projects, distributed generation facilities, and other energy installations requiring medium-voltage and low-voltage interfacing. Its electrical configuration can be selected according to the project's voltage levels, connection method, protection requirements, and operating conditions.
The transformer is suitable for infrastructure facilities such as water treatment plants, transportation systems, public buildings, hospitals, schools, and municipal facilities. Depending on the project specification, monitoring and protection equipment such as oil temperature indicators, oil level indicators, pressure relief devices, and other accessories can be included.
The 480V secondary side provides a suitable supply for motors and other industrial equipment, including pumps, compressors, HVAC systems, production machinery, and processing lines. The transformer can be coordinated with low-voltage switchgear, motor control centers, VFDs, protection devices, and distribution panels to form a complete power supply system for demanding industrial applications.
