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The 300kva oil immersed transformer is a core piece of equipment for small and medium-capacity power distribution. Utilizing high-quality transformer oil as the insulation and cooling medium, it features stable heat dissipation and robust overload capabilities. Our 300kva oil immersed transformer is ideal for outdoor small substations, SME industrial parks, rural grid upgrades, and flexible installation scenarios requiring reliable power.
Core Parameters:
• Energy Efficiency: Tier 2 Efficiency (Complies with GB 20052-2024).
• Maintenance: Periodic Maintenance Design.
• Warranty: 3-Year Standard Warranty.
Product Features
Tier 2 efficiency and pure copper windings reduce operational losses. The hermetically sealed tank minimizes oil degradation for a 25+ year lifespan.
Equipped with comprehensive protection devices (Buchholz relay, pressure valve, thermometer) for rapid circuit cut-off. Anti-corrosion tank withstands harsh weather.
The 300kva oil immersed transformer supports outdoor deployment without a dedicated room. Its robust 1.2x overload capacity effortlessly handles temporary peak loads.
The fully sealed structure of the 300kva oil immersed transformer drastically reduces maintenance frequency. Mature manufacturing processes ensure low failure rates.
Key Specifications (300kva oil immersed transformer)
Parameter | Typical Value | Description |
Rated Capacity | 300kVA | Max apparent power under long-term safe operation. |
Rated Voltage | 10kV / 0.4kV | Customizable (e.g., 6kV, 11kV, 35kV) to adapt to different grids. |
Vector Group | Dyn11 | Strong resistance to unbalanced loads; ensures balanced 3-phase supply. |
Impedance | 4.5%~6.5% | Standard 5%~6% limits short-circuit currents to protect equipment. |
No-Load Loss | ≤ 0.6kW | Meets Tier 2 standards; low idle energy consumption saves costs. |
Load Loss (75℃) | ≤ 3.2kW | Copper windings reduce resistance loss, ensuring high efficiency. |
Noise Level | ≤ 55~60dB(A) | Low-noise core structure reduces environmental noise pollution. |
Full S13 Series Technical Parameters
Capacity (kVA) | Impedance (%) | No-Load Loss (W) | Load Loss (W) | No-Load Current (%) | Dimensions W×D×H (mm) | Gauge (mm) |
| 30 | 4.0 | 80 | 630 / 600 | 1.2 | 790×580×910 | 400 |
| 50 | 4.0 | 100 | 910 / 870 | 1.2 | 830×600×970 | 400 |
| 63 | 4.0 | 110 | 1090 / 1040 | 1.0 | 850×630×1000 | 400 |
| 80 | 4.0 | 130 | 1310 / 1250 | 1.0 | 900×650×1000 | 400 |
| 100 | 4.0 | 150 | 1560 / 1500 | 0.8 | 950×700×1000 | 400 |
| 125 | 4.0 | 170 | 1890 / 1800 | 0.8 | 1100×800×1000 | 550 |
| 160 | 4.0 | 200 | 2310 / 2200 | 0.7 | 1200×900×1050 | 550 |
| 200 | 4.0 | 240 | 2730 / 2600 | 0.7 | 1300×1000×1050 | 550 |
| 250 | 4.0 | 290 | 3200 / 3050 | 0.7 | 1400×1050×1100 | 550 |
| 315 | 4.0 | 340 | 3830 / 3650 | 0.6 | 1500×1100×1150 | 660 |
| 400 | 4.0 | 410 | 4520 / 4300 | 0.6 | 1550×1150×1150 | 660 |
| 500 | 4.0 | 480 | 5410 / 5150 | 0.6 | 1650×1230×1200 | 660 |
| 630 | 4.5 | 570 | 6200 | 0.6 | 1600×1250×1250 | 820 |
| 800 | 4.5 | 700 | 7500 | 0.5 | 2100×1300×1650 | 820 |
| 1000 | 4.5 | 830 | 10300 | 0.5 | 2150×1350×1700 | 820 |
| 1250 | 4.5 | 970 | 12000 | 0.5 | 2200×1400×1900 | 820 |
| 1600 | 4.5 | 1170 | 14500 | 0.5 | 2300×1450×1900 | 820 |
| 2000 | 5.0 | 1360 | 18300 | 0.4 | 2100×2200×2100 | 820 |
| 2500 | 5.0 | 1600 | 21200 | 0.4 | 2150×2300×2200 | 820 |
* Data based on S13 series specifications[cite: 1306].
Detailed Description
The S13 type oil immersed transformer is a three-phase, fully sealed, copper-wound Tier 2 efficiency distribution transformer. It is currently a mainstream model for outdoor small and medium-capacity power distribution. Its fully sealed tank design effectively prevents oil oxidation and moisture ingress, significantly slowing oil degradation.
The 300kva oil immersed transformer utilizes copper windings that provide low resistance, achieving low-loss operation—reducing losses by approximately 20% compared to traditional S11 models. Combining excellent overload capabilities and environmental adaptability, this 300kva oil immersed transformer operates reliably in temperatures ranging from -25℃ to 40℃.
S11 Core Parameters & Applicable Scenarios
Parameter | Typical Value | Description |
Energy Efficiency | GB 20052-2024 Tier 2 (NX2) | Adapts to basic energy-saving compliance requirements, balancing performance and budget. |
No-Load Loss | Approx. 0.75kW | Slightly higher loss than S13, meeting basic power distribution energy consumption needs. |
Load Loss (75℃) | Approx. 10.5kW | Consistent with S13 models of the same capacity, ensuring stable load condition energy consumption. |
Partial Discharge | ≤ 10pC | Reliable insulation performance, ensuring basic operational safety. |
Core Material | High-Grade Silicon Steel | Balances magnetic permeability and cost, meeting conventional distribution needs. |
Applicable Scenarios | Budget-limited, load ≤ 60% | Ideal for normal industrial distribution, small commercial complexes, and rural grid upgrades. |
FAQ
There is no need for an immediate shutdown; you can first conduct live monitoring and troubleshooting.
Common causes:
1) Grid voltage fluctuations (e.g., high voltage), which increase the core magnetic density and elevate electromagnetic noise.
2) An uneven transformer foundation or slightly loose fixing brackets, causing resonance during operation.
3) Environmental temperature changes, causing slight sounds due to the thermal expansion and contraction of the oil tank.
Troubleshooting steps:
1) Use a multimeter to test the grid voltage and confirm if it is within the ±5% range of the rated voltage.
2) Check whether the transformer foundation is level and if any fixing bolts are loose; tighten them if necessary.
3) Monitor the oil temperature, oil level, and the status of the Buchholz relay. If only the noise has increased and other parameters are normal, you can continue operation and observe. However, if it is accompanied by rising oil temperatures, abnormal oil levels, or other issues, shut down for inspection immediately.
It needs periodic oil quality testing, seal inspection and dust cleaning. Regular checks on oil level, temperature and cooling parts help extend service life and keep stable daily power distribution operation.
This 300kva oil immersed transformer adapts to industrial parks, commercial areas and outdoor distribution stations. Its sealed structure resists moisture and dust for long-term outdoor and indoor continuous operation.
Yes, we support custom high and low voltage combinations. Common specifications include 10/0.4kv, and we can adjust winding design to meet clients’ local power grid and project needs.
Whatsapp: +86-13961294414
E-mail: junqiu.wang@czguanghui.cn
jocelyn.duan@czguanghui.cn
ADD: No. 1, Yulong Middle Road, Xuejia Town, Xinbei District, Changzhou City, China
Mobile: 0086-15380068868
