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The encapsulated dry-type transformer represents an advanced upgrade from standard models. Utilizing a fully sealed encapsulation process, the core and windings are entirely wrapped in a protective shell, completely isolating them from ambient dust, moisture, and corrosive gases. Its ultimate advantage lies in its extreme environmental weather resistance. It is purposely built for harsh environments such as highly humid coastal areas, heavy-dust cement plants, chemical factories with corrosive atmospheres, and challenging outdoor utility applications.
Core Parameters:
• Rated Capacity: 10kVA ~ 2500kVA (AF mode boosts capacity by 30%~50%).
• Rated Voltage: HV 10kV/6kV | LV 380V/400V/690V.
• Protection Level: Main body IP54 (Dust/Splash proof), expandable to IP65 with specialized enclosures.
Product Features
Fully sealed encapsulation blocks out severe environmental factors including dense industrial dust, coastal salt spray, and corrosive chemical vapors, ensuring enduring reliability.
The core body natively achieves an IP54 rating (dust and splash-proof). With specialized external enclosures, it escalates to IP65, perfectly conquering demanding outdoor terrains.
Utilizes flame-retardant epoxy resin for encapsulation. The insulation endurance strength is rigorously augmented by 10%~15% compared to standard dry-type models.
Standardly equipped for Natural Air (AN) cooling. Incorporating Forced Air (AF) cooling can safely surge output capacity by 30% to 50% for high-demand industrial periods.
Features a highly robust Dyn11 vector group to combat unbalanced loads. Supports varied low voltage outputs including 380V, 400V, and industrial 690V.
The airtight encapsulation practically eliminates the need for internal cleaning or insulation checks, yielding virtually zero maintenance costs over its extensive lifecycle.
Key Specifications (Encapsulated Dry-Type)
| Parameter | Typical Value | Description |
| Rated Capacity | 10kVA ~ 2500kVA | Highly scalable range. AN is the baseline capacity; AF mode boosts it by 30%~50%. |
| Rated Voltage | HV: 10kV / 6kV LV: 380V / 400V / 690V | Supports specialized 690V industrial outputs alongside standard distribution voltages. |
| Vector Group | Dyn11 | Standard connection ensuring robust handling of severe unbalanced electrical loads. |
| Insulation & Thermal | Class F (155℃) / Class H (180℃) | Flame-retardant epoxy encapsulation delivers 10%-15% higher dielectric strength. |
| Loss Metrics | No-Load: ≤ 1.2% of Capacity | Strictly adheres to national standards, maximizing operational energy efficiency. |
| Protection Level | Main Body: IP54 With Enclosure: Up to IP65 | The core differentiator; entirely prevents dust ingress and powerful water jets. |
Detailed Description
The encapsulated dry-type transformer is a revolutionary upgrade designed explicitly for punishing industrial and outdoor conditions. While traditional dry-type transformers excel indoors, this unit takes protection further by utilizing a fully sealed encapsulation process. The iron core, windings, and vital conductive components are enveloped in a robust, flame-retardant epoxy resin barrier. This ensures complete isolation from ambient dust, heavy moisture, coastal salt spray, and highly corrosive chemical fumes.
Boasting a native IP54 rating on the main body—expandable to IP65 with specialized enclosures—it thrives where conventional transformers would fail. Providing flexible capacities from 10kVA to 2500kVA and supporting unique industrial voltages like 690V, it handles unbalanced loads effortlessly via its Dyn11 vector group. With its augmented insulation strength (15% higher than standard models) and zero-maintenance architecture, it is the ultimate workhorse for metallurgy, mining, petrochemical plants, and rugged outdoor power nodes.
Standard SCB Series Technical Reference
| Capacity (kVA) | Impedance (%) | No-Load Loss (W) | Load Loss (W) | Total Weight (kg) | Dimensions W×D×H (mm) |
| 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 |
| 2000 | 4.5 | 2050 | 15600 | 4500 | 1750×1250×1800 |
| 2500 | 4.5 | 2450 | 19000 | 5300 | 1850×1300×1900 |
* The table displays standard dry-type technology platform parameters. Encapsulated models generally have a slightly larger outer dimension and weight due to the thick sealing resin layer.
FAQ
The choice heavily depends on the harshness of your operational environment. You should select the encapsulated model if you face the following conditions:
1) High Dust Environments: In cement plants, mining operations, or flour mills, heavy particulate matter can settle inside standard transformer coils, reducing cooling efficiency and causing short circuits. The encapsulated model’s IP54/IP65 barrier totally blocks dust ingress.
2) Corrosive Atmospheres: Standard exposed metal parts will rapidly degrade in chemical plants, paper mills, or coastal sites with high salt spray. The completely sealed resin encapsulation shields all sensitive copper and steel components from chemical corrosion.
3) High Humidity & Outdoor Use: Standard dry-types (usually IP20) cannot be exposed to rain or heavy condensation. The encapsulated transformer can handle direct moisture, allowing for safe outdoor deployments or operations in damp underground tunnels without the risk of arcing or insulation breakdown.
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E-mail: junqiu.wang@czguanghui.cn
jocelyn.duan@czguanghui.cn
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