13.8kv to 380v distribution transformer 2500kva is a core power conversion device for industrial, new energy and commercial scenarios, which can be classified into two mainstream configurations, including oil immersed type(S11 series) and dry type(SCB14 series).Both of them meet the requirements of 2500kVA capacity, professionally designed to steadily step down 13.8kV medium high voltage to 380V low voltage, strictly adhering to both international and domestic standards to ensure stable performance, high safety and long service life.
The oil-immersed type 13.8kv to 380v distribution transformer 2500kva has a low cost and strong overload capacity, making it suitable for outdoor heavy-load scenarios such as mines, outdoor substations and large industrial parks. In contrast, the dry type 13.8kv to 380v distribution transformer 2500kva is fireproof, explosion-proof, maintenance-free, and energy-efficient, suitable for indoor and explosion-proof requirements. Customers can flexibly choose the suitable type according to actual installation environment, site safety regulations and project budget.
| Parameter Category | Parameter Name | Standard Value |
|
Core Rated Parameters |
Rated Capacity | 2500kVA(2.5MVA) |
| High Voltage Side(HV) | 13.8kV,Three-phase,△ Connection | |
| Low Voltage Side(LV) | 380V(Line Voltage)/220V(Phase Voltage),Three-phase,Y Connection | |
| Rated Frequency | 50/60Hz | |
| Connection Group | Dyn11/Dyn1 | |
| Short-circuit Impedance | 5%(Typical,4%-6%Customizable) | |
| Tap Changer | High Voltage±2×2.5%(5 Taps,Off-circuit) | |
| Oil-immersed Parameters | Model Example | S11/S13/S22-2500/13.8 |
| Cooling Method | ONAN(Oil-immersed Natural Cooling)/ONAF(Forced Air Cooling) | |
| Insulation Level |
BIL 95KV(Lightning Impulse)/30kV(Power Frequency Withstand Voltage) |
|
| Advantages | Low cost,strong overload capacity,good heat dissipation | |
| Dry-type Parameters | Model Example | SCB14/SCR-2500-13.8/0.38 |
| Cooling Method |
AN(Natural Cooling)/AF(Forced Air Cooling),Insulation Heat Resistance Class F(155℃) |
|
| Protection Level | IP00/IP23/IP54 | |
| Advantages | Fire and explosion proof,maintenance-free,small size | |
|
Loss and Efficiency(50Hz Reference) |
No-load Loss(Po) | ×2.8-3.5kW |
| Load Loss(Pk,75℃) | ×16-19kW | |
| Total Loss | ×19-22.5kW |
Oil immersed S11 is specially designed for outdoor and open air installation. With strong environmental adaptability, it can withstand high temperature, rain, dust and harsh climate. It occupies a large floor space and requires a well-ventilated independent area, which is perfect for remote industrial zones, outdoor substations, mining sites and field power distribution projects.
Dry type SCB14 13.8kv to 380v distribution transformer 2500kva is prioritized for indoor installation, such as power distribution rooms, factory buildings, commercial complexes and underground spaces. It features compact size and small occupation, no risk of liquid leakage, and does not need isolation pool. It is also applicable for high-density urban power supply and confined installation spaces.
Oil immersed S11 adopts transformer oil as cooling and insulating medium. The flammable oil brings potential fire and leakage risks, so it cannot be used in closed, crowded or explosion-proof areas. Additional fire prevention and anti-leakage measures are required during installation.
Made of epoxy resin casting structure, dry type SCB14 features fireproof, flame retardant, explosion-proof and non-leakage. It has high insulation safety, no hidden danger of combustion, and fully meets strict safety standards for indoor, public buildings, chemical plants and explosion-proof workshops.
The regular maintenance of 13.8kv to 380v distribution transformer 2500kva oil immersed S11 is required, including periodic inspection of oil quality, sealing performance, oil level and internal aging. Oil filtering or replacement is needed every 1-2 years, with regular professional inspection, leading to higher long-term maintenance workload.
Dry type SCB14 is nearly maintenance-free design. No insulating oil is needed, only simple dust cleaning for windings on a regular basis. It needs no complex daily inspection, saving labor and maintenance costs, and suitable for unattended power stations.
Oil immersed S11 possess superior heat dissipation ability by circulating transformer oil, with strong overload capacity. It can sustain long term heavy-load operation and short time overload impact, ideal for continuous high load industrial production lines.
Dry type SCB14 relies on natural air cooling or forced air cooling. The overload limit is relatively lower than oil immersed type, and the heat dissipation effect is easily affected by indoor ventilation conditions, more suitable for stable and conventional load operation.
The purchase cost of oil immersed S11 is relatively lower for large capacity models. But its no-load loss and load loss are slightly higher, resulting in relatively higher long term power consumption.
The procurement cost of dry type SCB14 is comparatively higher , but with optimized low loss design and higher energy efficiency. It reduces daily power loss, saves electricity expenses in long term operation, and brings better energy saving benefits for long-cycle projects.
13.8kv to 380v distribution transformer 2500kva final Selection Suggestion:
Choose S11 Oil immersed: If your project is outdoors, with limited budget, long-term heavy load, unattended open site and no strict fire protection requirements.
Choose SCB14 Dry type: If installed indoors, in dense crowds, chemical and flammable occasions, with high safety standards, low maintenance demand and long-term energy-saving requirements.
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