10kV Oil-Immersed Distribution Transformer
Standards
GB / IEC 60076
Testing
Routine report
Origin
China
10kV Distribution Transformers
400 kVA 10 kV Oil-Immersed Transformer Pure Copper
400KVA 10KV All-Copper Oil-immersed Transformer : Core Equipment for Outdoor Power Distribution
- Product type
- 10kV Oil-Immersed Distribution Transformer
- Rated capacity
- 400 kVA
- Voltage class
- 10 kV
- Cooling
- ONAN / ONAF
- Tap range
- Off-circuit or on-load, project-specific
- Winding
- Copper or aluminium (project-specific)
Final ratings, losses, impedance and dimensions are confirmed on the approved datasheet. Website values are for family selection.
- Routine test report with the unit
- English GA drawing and O&M manual
- Copper or aluminium winding options
- 50 Hz / 60 Hz and harsh-site options
Product overview
400KVA 10KV All-Copper Oil-immersed Transformer : Core Equipment for Outdoor Power Distribution
Currently, the power distribution industry commonly suffers from high losses in aluminum core transformers, leading to overheating and aging under overload conditions. Purchasers often face challenges such as short equipment lifespan, substandard grid connection parameters, and high ongoing maintenance costs. This 400KVA 10KV all-copper oil-immersed transformer offers a solution using high-purity copper windings and a fully sealed heat dissipation structure. It can stably operate at full load in factories and photovoltaic power plants for extended periods, resulting in reduced energy consumption and significantly decreased failure frequency, effectively compressing the overall project cost throughout its lifecycle. This equipment is often used in conjunction with a High And Low Voltage Switchgear to build basic power distribution systems. Compared to a Dry Type Transformer of the same specifications, it has stronger heat dissipation capacity and is more suitable for outdoor scenarios with limited ventilation, such as in the field and industrial mines. It can be deployed independently or integrated into a Box Type Substation . It is compatible with Combined Photovoltaic Substations for centralized photovoltaic power supply projects. Combined with an Electric Power Converter , it completes AC/DC voltage conversion and is widely used in industrial parks, rural power grids, large-scale photovoltaic power plants, and temporary power supply in mines. The all-copper winding material has lower resistance and excellent short-circuit withstand performance, maintaining stable output even under fluctuating production loads and extreme high and low temperature environments. The equipment undergoes a full set of insulation, withstand voltage, and loss tests at the factory, conforming to internationally recognized power distribution standards. Complete testing documentation is provided with bulk deliveries, adapting to various power engineering procurement needs both domestically and internationally. Long-term operation requires no frequent downtime for maintenance, extending its service life by nearly ten years compared to aluminum core equipment, reducing economic losses from downtime maintenance. Combining economy and operational stability, it is a cost-effective main choice for medium to large-scale outdoor power distribution projects.
Design features
What the design is built around
Pure Copper Winding Low-Loss Structure
Utilizing high-purity electrolytic copper windings, the coils exhibit superior no-load and load losses compared to industry standards, resulting in lower long-term electricity costs. It also boasts excellent resistance to short-circuit impacts, making it suitable for industrial and mining applications and photovoltaic scenarios with significant load fluctuations.
Fully Sealed Oil-Immersed Cooling System
The corrugated cooling structure of the oil tank eliminates the need for an external fan, adapting to dusty outdoor environments with large temperature differences. Equipped with pressure relief and oil level monitoring dual protection devices, it offers ample operational safety redundancy.
Purchase and Maintenance Tips
During the selection phase, confirm the project's altitude and pollution level. If integration into a Box Type Substation or matching Combined Photovoltaic Substations is required, inform the technical team in advance to adjust the equipment's external dimensions and wiring interfaces.
Routine maintenance only requires annual testing of the insulating oil withstand voltage and biennial retesting of the winding resistance. Promptly verifying the three-phase load balance when abnormal oil temperature rises can significantly extend the equipment's service life.
Typical specification
Specifications to confirm on the datasheet
| Product type | 10kV Oil-Immersed Distribution Transformer |
|---|---|
| Rated capacity | 400 kVA |
| Voltage class | 10 kV |
| Cooling | ONAN / ONAF |
| Tap range | Off-circuit or on-load, project-specific |
| Winding | Copper or aluminium (project-specific) |
| Standards | GB 1094.1, GB/T 6451, IEC 60076 |
| Testing | Routine tests plus type and special tests on request |
The table is a family-level starting point. The approved datasheet fixes the guaranteed values, drawing dimensions and test plan for the specific order.
Typical applications
- 10 kV utility distribution feeders
- Industrial parks and factory substations
- Commercial buildings and campuses
- Distributed PV and wind projects
- Rural electrification and grid upgrades
Confirm before ordering
- Rated capacity, voltage ratio and tap range
- Impedance, fault level and parallel operation
- Ambient temperature, altitude and enclosure
- Winding material, losses and efficiency class
- Terminations, protection and monitoring
- Tests, inspection, packing and shipping limits
Buyer questions
FAQ for 400 kVA 10 kV Oil-Immersed Transformer Pure Copper
Can this Oil Immersed Transformer be used for indoor basement power distribution?
How long is the after-sales warranty period, and how can I obtain maintenance support for overseas purchases?
Does the equipment support customized voltage parameters? Can it be supplied as a complete set with an Electric Power Converter?
What are the operational requirements for restarting the equipment after a long period of inactivity?
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