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The 225kVA cast-resin dry-type transformer is a highly robust, medium-capacity three-phase distribution equipment. It is expertly designed to satisfy centralized power demands for dynamic production lines in mid-sized factories, large supermarkets, office buildings, and hospital outpatient departments. Utilizing a high-permeability CRGO silicon steel core alongside oxygen-free copper windings treated with advanced vacuum casting or VPI technology, it forms a hermetic, oil-free insulation barrier. This guarantees exceptional flame retardancy, low noise, and stable load-bearing capabilities when multiple devices run simultaneously.
Core Parameters:
• Energy Efficiency: Tier 1 Efficiency (Compliant with national standards for superior energy savings).
• Cooling Mode: Dual-Mode AN/AF (Capacity surges to 292.5kVA under forced air).
• Protection: IP20/IP23 for indoor use, scalable to fully enclosed IP54 for outdoor applications.
Product Features
A totally oil-free design featuring resin-cast or VPI impregnated windings. The 225 kVA dry type transformer adopts materials that are inherently self-extinguishing and flame retardant, ensuring 100% safety for densely populated venues like hospitals and malls.
Utilizes the standard Dyn11 vector group for superior resistance against unbalanced loads. A stable 4%~6% short-circuit impedance safeguards the system, delivering exceptionally smooth voltage output — a hallmark of every reliable 225 kVA dry type transformer on the market.
The combination of a high-permeability CRGO silicon steel core and oxygen-free copper drastically reduces operational noise and satisfies Tier 1 energy efficiency standards, lowering operational costs.
Supports both Natural Air (AN) and Forced Air (AF) cooling modes. By engaging the AF mode, the capacity is safely amplified by 30% up to 292.5kVA, gracefully handling short-term peak load surges.
Features Class F/H insulation that resists dust and moisture across broad temperature ranges. Available with IP20/IP23 enclosures for indoors or custom IP54 for outdoors. Requires only simple visual cleaning.
Key Specifications (225kVA Dry Type Transformer)
| Parameter | Typical Value | Description |
| Rated Capacity | 225kVA (AN) / 292.5kVA (AF) | Provides 225kVA naturally, effortlessly scaling up 30% under forced fan cooling. |
| Rated Voltage | HV: 10kV | LV: 400V | Standard high voltage (customizable to 6kV/20kV); 400V output suits 3-phase 4-wire systems. |
| Vector Group | Dyn11 | Provides robust performance against unbalanced loads, maximizing grid stability. |
| Insulation Class | Class F (155℃) / Class H (180℃) | Epoxy resin casting or VPI process guarantees high thermal limits and electrical safety. |
| Short-Circuit Impedance | 4% ~ 6% | Reliably withstands the mechanical impact of grid short-circuits to ensure safe operation. |
| Efficiency Level | Tier 1 Standard | Exceptional energy-saving performance covering both no-load and load conditions. |
| Protection Level | IP20 / IP23 (Indoor) IP54 (Outdoor Custom) | Scalable enclosure configurations to match any indoor or harsh outdoor setting. |
Detailed Description
The 225 kva dry type transformer is a robust, medium-capacity three-phase power distribution unit. It is purpose-built to supply centralized power for dynamic factory production lines, large retail supermarkets, corporate office buildings, and hospital outpatient departments, easily carrying the load of multiple devices operating concurrently. The core structure is driven by a high-permeability cold-rolled grain-oriented silicon steel core, assembled using a 45° full-mitre step-lap method to dramatically reduce operational noise and no-load losses.
Its oxygen-free copper windings are seamlessly encapsulated using either epoxy resin vacuum casting or VPI (Vacuum Pressure Impregnation) technology. As a leading dry type transformer manufacturer, this process creates a dense, impermeable insulation layer (Class F/H) that is fundamentally oil-free—eliminating any risk of leaks or combustion. At its core, this 225 kva dry type transformer supports both Natural Air (AN) and Forced Air (AF) cooling; engaging AF mode allows the capacity to safely expand to 292.5kVA. Combining Tier 1 energy efficiency with flexible enclosure options (IP20/IP23 standard, IP54 custom), it guarantees both ultimate safety and remarkable long-term economic efficiency.
Standard Dry-Type 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 |
* The table displays standard SCB technology platform parameters. 225kVA is a highly customized specification falling squarely between the 200kVA and 250kVA platforms. Actual losses are further optimized to meet Tier 1 efficiency criteria.
FAQ
Our 225 kva dry type transformer fits indoor factories, hospitals, schools and solar stations. It has no flammable oil, meets strict fire safety standards and supports IP20/IP54 enclosures for different indoor environments.
Our 225 kva dry type transformer provides natural air cooling (AN) and forced air cooling (AF). The extra cooling fans help it bear short-time overload and stabilize operation under high ambient temperature.
With regular inspection and proper load control, our 225 kva dry type transformer can work steadily for over 25 years. Its epoxy resin winding resists aging, moisture and partial discharge to extend whole unit lifespan.
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
