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The cast-resin dry-type transformer is the ultimate centralized power hub for indoor and medium-large substations. Engineered with high-strength vacuum-cast epoxy resin, acoustic optimization, and a highly stable distribution structure, it delivers accurate, oil-free power. Achieving the stringent Tier 1 (NX1) energy efficiency standard, it reduces losses by 35%~45%. Its dust-proof, zero-fire-risk nature makes it the safest and most reliable choice for commercial skyscrapers, large factory floors, municipal facilities, and advanced data centers aiming for continuous operation with minimal OPEX.
Core Parameters:
• Energy Efficiency: Tier 1 Efficiency (GB 20052-2024 NX1), maximizing energy ROI.
• Structure: Solid Resin Cast Insulation + High-Grade Silicon Steel (Partial Discharge ≤5pC).
• Enclosure: IP40+ Custom Cabinets available for complex indoor integrations.
Manufacturer Core Advantages
Complies with GB 20052-2024 Tier 1 standards. By utilizing high-grade CRGO steel, it slashes no-load and load losses by 35%~45%, delivering massive electricity savings for continuous distribution.
Advanced vacuum casting minimizes internal air gaps, achieving a partial discharge of ≤5pC. This ensures unparalleled insulation integrity and guarantees long-term safe operations.
100% oil-free design using premium flame-retardant epoxy resin. It acts as a self-extinguishing barrier, completely eliminating the explosion hazards inherent in oil-filled units.
Engineered with an optimized distribution coil structure, ensuring highly accurate voltage outputs (from 10kV/20kV down) perfectly suited for sensitive commercial and industrial loads.
Available as an open-type unit or fitted with high-protection IP40 steel casings equipped with sealed cable entry ports, perfectly isolating it from dusty or complex indoor environments.
Optional smart monitoring modules offer remote, real-time tracking of critical data like winding temp and load currents, elevating the operational management of the entire distribution setup.
Key Specifications (Tier 1 NX1 Cast-Resin)
| Parameter | Typical Value | Description |
| Energy Efficiency | Tier 1 (GB 20052-2024 NX1) | Top-tier energy savings for demanding, continuous indoor distribution networks. |
| Rated Voltage | HV: 10kV / 20kV LV: 0.4kV | Highly precise distribution output to directly power 3-phase commercial and industrial machinery. |
| No-Load Loss | Approx. 0.2kW ~ 1.8kW | Extremely low idle energy waste through premium low-loss CRGO silicon steel. |
| Load Loss (120℃) | Approx. 1.5kW ~ 11.0kW | Superb energy conversion efficiency under heavy, continuous distribution loads. |
| Partial Discharge | ≤ 5pC | Industry-leading internal insulation purity via vacuum casting, reducing breakdown risks. |
| Protection Structure | IP20 / IP40 (Optional) | Can be supplied with dedicated steel enclosures to block severe indoor dust and moisture. |
Full Series Technical Parameters (SCB13/NX1 Platform)
| Capacity (kVA) | Impedance (%) | No-Load Loss (W) | Load Loss (W) | Total Weight (kg) | Dimensions W×D×H (mm) |
| 30 | 4.0 | 130 | 600 | 250 | 800×600×900 |
| 50 | 4.0 | 170 | 850 | 320 | 850×650×950 |
| 100 | 4.0 | 220 | 1400 | 550 | 950×700×1000 |
| 250 | 4.0 | 400 | 2700 | 1050 | 1150×800×1150 |
| 500 | 4.0 | 680 | 4800 | 1700 | 1300×950×1300 |
| 800 | 4.5 | 980 | 7100 | 2300 | 1400×1000×1400 |
| 1250 | 4.5 | 1350 | 10400 | 3200 | 1550×1100×1550 |
| 1600 | 4.5 | 1650 | 12800 | 3800 | 1650×1150×1650 |
| 2000 | 4.5 | 2050 | 15600 | 4500 | 1750×1250×1800 |
| 2500 | 4.5 | 2450 | 19000 | 5300 | 1850×1300×1900 |
| 3150 | 4.5 | 3000 | 23000 | 6500 | 2000×1400×2100 |
* The comprehensive table above showcases our base cast-resin structural platform. As Tier 1 (NX1) models, the final units feature heavily optimized cores, meaning actual loss values (No-Load/Load Watts) are strictly guaranteed to be substantially lower than these standard reference limits.
Detailed Description
Our Tier 1 efficiency cast-resin dry-type transformer is the pinnacle of indoor centralized power distribution. Built strictly under IEC and national standards, it utilizes an advanced, high-grade silicon steel core paired with a highly stable vacuum-cast coil structure. Its most prominent feature is its NX1 energy rating, which cuts electrical losses by 35%~45% over traditional units. This ensures a rapid return on investment for large-scale industrial operations, commercial skyscrapers, and high-demand municipal facilities that run high-capacity loads continuously.
Beyond efficiency, it prioritizes unparalleled safety. The completely oil-free resin insulation delivers an ultra-low partial discharge (≤5pC) and is inherently flame-retardant. Whether deployed as an open-type unit in a clean indoor substation or outfitted with a rugged IP40 steel cabinet for a dusty factory floor, it executes centralized power distribution with whisper-quiet, zero-hazard reliability.
FAQ
The vacuum resin casting process is the defining technology that ensures the safety, longevity, and efficiency of our dry-type transformers:
1) Eliminating Partial Discharge: By pouring the epoxy resin under a strict vacuum, all microscopic air bubbles are sucked out of the windings before the resin hardens. Air bubbles inside high-voltage insulation cause "partial discharge" (tiny internal sparks), which eventually destroys the insulation. Our vacuum process guarantees a partial discharge of ≤5pC, ensuring the core runs safely for 25+ years.
2) Extreme Structural Strength: Once the resin cures, the copper windings are encased in a solid, rock-hard block. This provides immense mechanical strength, allowing the transformer to easily withstand the massive electromagnetic shocks generated during short-circuits without deforming.
3) Moisture & Dust Proofing: The solid, impenetrable resin barrier means that high humidity, coastal salt spray, or industrial dust cannot reach the conductive copper. This makes the transformer completely maintenance-free regarding internal cleaning.
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
