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The 300kVA oil-immersed power transformer is a core distribution equipment for small and medium-capacity single-phase systems. Featuring a fully sealed oil-immersed insulation and a highly efficient cooling system, oil immersed transformer combines low loss and reliable insulation with high stability and strong adaptability. It is highly suitable for various single-phase distribution scenarios, including urban residential communities, rural centralized living areas, small industrial workshops, and commercial complexes. Oil immersed transformer operates stably in standard climates (-25℃ to 40℃) to seamlessly meet single-phase power transmission needs.
Core Parameters:
• Energy Efficiency: Tier 2 Efficiency (Complies with GB 20052-2024).
• Structure: Fully Sealed Tank + Highly Efficient Cooling System.
• Warranty: 3-Year Standard Warranty.
Product Features
A specialized high-efficiency cooling system provides a large, uniform heat dissipation area. It perfectly adapts to continuous distribution operations, effectively controlling temperature rise.
Tier 2 efficiency design + pure copper windings minimize running losses. The fully sealed tank prevents oil degradation, yielding a design lifespan exceeding 25 years.
Equipped with complete protection devices (Buchholz relay, pressure valve, fault alarms). The anti-corrosion tank adapts safely to complex outdoor and semi-outdoor environments.
Its compact volume supports diverse installation layouts (outdoor open-air, narrow indoors). A 1.2x overload capacity handles temporary peak loads effortlessly.
The fully sealed structure drastically reduces maintenance frequency. Mature core components ensure a low failure rate, meeting low O&M cost requirements.
Optimized specifically for single-phase distribution networks. Convenient wiring precisely matches single-phase equipment demands, avoiding 3-phase conversion waste.
Key Specifications (300kVA Single-Phase)
| Parameter | Typical Value | Description |
| Rated Capacity | 300kVA | Maximum apparent power for long-term safety, meeting single-phase distribution load needs. |
| Rated Voltage | 10kV / 0.23kV | Customizable 6kV, 11kV high voltage to adapt to different distribution grid standards. |
| Vector Group | Ii0 | Standard single-phase connection; simple wiring perfectly adapted to single-phase systems. |
| Impedance | 4.5%~6.5% | Standard 5%~6% limits short-circuit currents, protecting downstream equipment. |
| No-Load Loss | ≤ 0.55kW | Complies with Tier 2 standards; low idle energy consumption saves operational costs. |
| Load Loss (75℃) | ≤ 3.0kW | Copper windings and efficient cooling structures elevate energy conversion efficiency. |
| Winding Temp. Rise | ≤ 65K (AN, Class A) | Synergistic temperature control prevents insulation aging caused by excessive heat. |
| Noise Level | ≤ 52~57dB(A) | Low-noise core and shock-absorbing design lower noise by 5dB, reducing environmental pollution. |
| Cooling Method | ONAN + High Efficiency | Highly efficient cooling system tailored for continuous power distribution operations. |
Detailed Description
The S13 type oil immersed power transformer is a single-phase, Tier 2 efficiency distribution transformer featuring a fully sealed oil-immersed insulation, a highly efficient cooling system, and pure copper windings. It is the mainstream model for small and medium-capacity single-phase distribution in the domestic market. Its core advantage lies in its strong universal adaptability; equipped with comprehensive insulation protection and thermal regulation, it seamlessly adapts to diverse and complex single-phase environments.
The fully sealed structure prevents oil oxidation and moisture ingress. Combined with low-resistance copper windings and the high-performance cooling system, 300kva single phase oil immersed power transformer achieves stable, low-loss operation. Delivering exceptional overload capacity and reliable performance in environments from -25℃ to 40℃, it acts as a dependable power support for various single-phase transmission scenarios.
S11 Type Power Transformer Parameters & Scenarios
| Parameter | Typical Value | Description |
| Energy Efficiency | GB 20052-2024 Tier 2 (NX2) | Adapts to basic energy-saving compliance requirements. |
| No-Load Loss | Approx. 0.7kW | Slightly higher loss than S13, satisfying basic single-phase distribution energy needs. |
| Load Loss (75℃) | Approx. 3.0kW | Consistent with the S13 model of the same capacity. |
| Partial Discharge | ≤ 10pC | Reliable insulation performance, ensuring basic distribution operational safety. |
| Structure | Sealed Tank + Basic Cooling | Adequate for conventional distribution scenarios ensuring basic operational demands. |
| Applicable Scenarios | Budget-limited, load ≤ 60% | Ideal for rural centralized communities, small community distribution, and older system upgrades. |
Standard S13 Series Technical Reference
| Capacity (kVA) | Impedance (%) | No-Load Loss (W) | Load Loss (W) | No-Load Current (%) | Oil Weight (kg) | Total Weight (kg) | Dimensions W×D×H (mm) | Gauge (mm) |
| 30 | 4.0 | 80 | 630 / 600 | 1.2 | 100 | 340 | 790×580×910 | 400 |
| 50 | 4.0 | 100 | 910 / 870 | 1.2 | 115 | 410 | 830×600×970 | 400 |
| 63 | 4.0 | 110 | 1090 / 1040 | 1.0 | 120 | 440 | 850×630×1000 | 400 |
| 80 | 4.0 | 130 | 1310 / 1250 | 1.0 | 135 | 470 | 900×650×1000 | 400 |
| 100 | 4.0 | 150 | 1560 / 1500 | 0.8 | 150 | 500 | 950×700×1000 | 400 |
| 125 | 4.0 | 170 | 1890 / 1800 | 0.8 | 175 | 600 | 1100×800×1000 | 550 |
| 160 | 4.0 | 200 | 2310 / 2200 | 0.7 | 200 | 700 | 1200×900×1050 | 550 |
| 200 | 4.0 | 240 | 2730 / 2600 | 0.7 | 215 | 750 | 1300×1000×1050 | 550 |
| 250 | 4.0 | 290 | 3200 / 3050 | 0.7 | 240 | 900 | 1400×1050×1100 | 550 |
| 315 | 4.0 | 340 | 3830 / 3650 | 0.6 | 275 | 1050 | 1500×1100×1150 | 660 |
| 400 | 4.0 | 410 | 4520 / 4300 | 0.6 | 310 | 1300 | 1550×1150×1150 | 660 |
| 500 | 4.0 | 480 | 5410 / 5150 | 0.6 | 360 | 1500 | 1650×1230×1200 | 660 |
| 630 | 4.5 | 570 | 6200 | 0.6 | 420 | 1700 | 1600×1250×1250 | 820 |
| 800 | 4.5 | 700 | 7500 | 0.5 | 520 | 2100 | 2100×1300×1650 | 820 |
| 1000 | 4.5 | 830 | 10300 | 0.5 | 620 | 2400 | 2150×1350×1700 | 820 |
| 1250 | 4.5 | 970 | 12000 | 0.5 | 680 | 2700 | 2200×1400×1900 | 820 |
| 1600 | 4.5 | 1170 | 14500 | 0.5 | 880 | 3400 | 2300×1450×1900 | 820 |
| 2000 | 5.0 | 1360 | 18300 | 0.4 | 1050 | 4400 | 2100×2200×2100 | 820 |
| 2500 | 5.0 | 1600 | 21200 | 0.4 | 1260 | 5000 | 2150×2300×2200 | 820 |
* The table above shows standard three-phase S13 series parameters, provided as a general manufacturing reference for the S13 technology platform.
FAQ
It typically supports primary voltages like 11kV/33kV with secondary output of 220V/400V.
It uses ONAN (Oil Natural Air Natural) cooling, relying on natural oil circulation and air convection.
The weight is approximately 1500–1800 kg with dimensions around 1500×1000×1400 mm depending on design.
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E-mail: junqiu.wang@czguanghui.cn
jocelyn.duan@czguanghui.cn
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Mobile: 0086-15380068868
