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The 300kVA cast-resin dry-type transformer is a core equipment for medium-to-small capacity distribution systems. Utilizing an enhanced resin-cast insulation and an optional dual-mode natural/forced air cooling system, it merges the eco-friendly, zero-fire-risk benefits of dry-type equipment with high efficiency and adaptability. It is highly suitable for medium-small industrial parks, office buildings, residential substations, hospitals, schools, and mid-sized data centers. It provides highly reliable and stable power transmission in standard climates (-25℃ to 40℃).
Core Parameters:
• Energy Efficiency: Tier 2 Efficiency (Complies with GB 20052-2024).
• Structure: Enhanced Resin Cast + Natural/Forced Air Cooling (Anti-corrosion, zero-leakage).
• Warranty: 3-Year Standard Warranty.
Product Features
Fully oil-free enhanced resin insulation. Inherently flame retardant and self-extinguishing, ensuring absolute safety for densely populated areas and pollution-sensitive facilities.
Tier 2 efficiency and large-section copper windings minimize running losses. The anti-aging resin repels moisture and dust, ensuring a robust design lifespan exceeding 25 years.
Equipped with smart temp controllers, overheat alarms, short-circuit, and lightning surge protection devices. The fully enclosed thick enclosure easily handles complex semi-outdoor setups.
Lightweight and compact modular design saves vital infrastructure space. Features a 1.2x overload capacity capable of seamlessly sustaining sudden power peaks.
Absolutely no oil testing needed. A simple semi-annual visual check and dust wipe of the cooling channels are sufficient, making it perfect for low-O&M operations on a 300 kVA dry type transformer.
Supports integration with a smart monitoring system to remotely track winding temperatures, load currents, and insulation status, minimizing physical patrol needs for any dry type transformer — including the 300 kVA dry type transformer in remote or hard-to-access installations.
Key Specifications (300 kva dry type transformer SCB13 Series)
| Parameter | Typical Value | Description |
| Rated Capacity | 300kVA | Long-term safe apparent power, satisfying standard mid-small capacity distribution scenarios. |
| Rated Voltage | HV: 10kV | LV: 0.4kV | Customizable inputs (e.g., 6kV) to adapt to varying regional grid standards. |
| Vector Group | Dyn11 / Yyn0 | Mainstream connections ensuring simple wiring and excellent compatibility with 3-phase loads. |
| Impedance | 4.0% ~ 6.0% | Standard values tailored to effectively limit short-circuit currents and protect the grid. |
| No-Load Loss | ≤ 0.88kW (SCB13) | Tier 2 compliant; ultra-low idle energy consumption saves electricity costs. |
| Load Loss (120℃) | ≤ 3.30kW | Copper windings minimize resistance losses, converting energy efficiently under load. |
| Winding Temp. Rise | ≤ 100K (Class F) | Enhanced resin insulation and dual-mode air cooling prevent heat-induced insulation aging. |
| Noise Level | ≤ 48~52dB(A) | Low-noise core and shock-absorbing base ensure whisper-quiet operation in populated areas. |
| Cooling Method | AN / AF | Natural air for normal loads; forced air (AF) boosts load capacity safely by 30%. |
Detailed Description
The 300 kva dry type transformer (represented by the mainstream SCB13 series) is a three-phase, Tier 2 efficiency distribution equipment utilizing an enhanced resin-cast insulation and pure copper windings. It serves as the primary choice for medium-small dry-type distribution nationwide. 300 kva dry type transformer is distinct advantage lies in combining ultimate safety and eco-friendliness with flexible adaptation, fitting seamlessly into space-constrained and safety-critical environments.
The enhanced resin-cast insulation structure employs thickened layers to fully block moisture and dust, averting winding deterioration. Highly flame retardant, it eradicates the fire hazards typical of oil-immersed alternatives. Large-section copper windings operate harmoniously with the efficient dual-mode (natural and optional forced air) cooling system to ensure stable, low-loss performance. Functioning reliably between -25℃ to 40℃, it provides impeccable power support for commercial and administrative facilities.
SCB10 Type 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. 0.98kW | Slightly higher than SCB13, fulfilling fundamental distribution needs. |
| Load Loss (120℃) | Approx. 3.30kW | Consistent with the SCB13 model of the same capacity. |
| Partial Discharge | ≤ 10pC | Reliable insulation performance, ensuring operational safety. |
| Core Material | Standard High-Grade Silicon Steel | Balances magnetic permeability and cost for conventional operations. |
| Applicable Scenarios | Budget-limited, load ≤ 60% | Ideal for older residential upgrades, standard small factories, and basic infrastructure demanding highly economical base power. |
Standard SCB13 Series Technical Reference
| Capacity (kVA) | Impedance (%) | No-Load Loss (W) | Load Loss (W) | Total Weight (kg) | Dimensions W×D×H (mm) |
| 160 | 4.0 | 280 | 1900 | 750 | 1050×750×1050 |
| 200 | 4.0 | 340 | 2300 | 880 | 1100×800×1100 |
| 250 | 4.0 | 400 | 2700 | 1050 | 1150×800×1150 |
| 315 | 4.0 | 480 | 3300 | 1250 | 1200×850×1200 |
| 400 | 4.0 | 570 | 3900 | 1450 | 1250×900×1250 |
| 500 | 4.0 | 680 | 4800 | 1700 | 1300×950×1300 |
* The table displays standard SCB13 dry-type technology platform parameters. 300kVA is available as a customized tier perfectly matched within this scale.
FAQ
A 300 kva dry type transformer typically supports primary voltages from 3.3kV to 35kV, with secondary outputs at 400V/230V, suitable for indoor commercial and industrial use.
The 300 kva dry type transformer uses natural air cooling (AN) or forced air cooling (AF), ensuring safe operation without oil, ideal for fire-sensitive environments.
A 300 kva dry type transformer weighs approximately 1,200–1,800 kg depending on voltage class and core material, making it easier to install than oil-filled units.
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