Social Media
The air-cooled dry-type transformer operates without the use of insulating oil, utilizing ambient air as its primary cooling medium through Natural Air (AN) or Forced Air (AF) convection. Its core advantages lie in being completely fireproof, explosion-proof, environmentally friendly, and virtually maintenance-free. With its advanced thermal dynamics and intelligent cooling fans, it seamlessly adapts to strict safety zones, indoor electrical rooms, densely populated commercial buildings, industrial hubs, and renewable energy integration scenarios.
Core Parameters:
• Cooling Mode: Dual AN / AF (Activating cooling fans boosts capacity by 1.3x to 1.5x).
• Voltage Configuration: HV 10kV/20kV/35kV | LV 0.4kV.
• Insulation Class: Class F (155℃) or Class H (220℃) for supreme heat tolerance.
Product Features
Equipped with an intelligent dual-mode cooling system. Activating the Forced Air (AF) fans safely escalates the operational capacity by 1.3 to 1.5 times, effortlessly managing sudden peak loads.
By completely substituting insulating oil with solid resins and air, it becomes inherently flame-retardant and explosion-proof. The ultimate choice for densely populated indoor structures.
Adopts the Dyn11 vector group configuration. It exhibits phenomenal resistance to asymmetrical loads and suppresses zero-sequence harmonics, ensuring a highly stable 3-phase supply.
Designed with Class F (155℃) or ultra-high Class H (220℃) insulation systems. The winding materials withstand immense thermal stress without deteriorating, prolonging equipment life.
Fitted with a specialized tap changer offering ±2×2.5% or ±5% adjustment ranges, allowing operators to fine-tune the primary voltage drops and deliver a steady output.
Eco-friendly and oil-free. Simply ensure adequate ambient ventilation and perform periodic dusting of the air channels. Substantially slashes long-term grid maintenance budgets.
Key Specifications (Air-Cooled Dry-Type)
| Parameter | Typical Value | Description |
| Rated Capacity (SN) | AN: Base Capacity AF: 1.3x ~ 1.5x of AN | Dual rating based on cooling state. AF mode delivers massive temporary or continuous load expansion. |
| Rated Voltage | HV: 10kV / 20kV / 35kV LV: 0.4kV | Supports broad primary grids, stepping down to standard 3-phase low voltage. |
| Voltage Regulation | ±2×2.5% or ±5% | Off-circuit tap changer allows fine-tuning to stabilize load-end voltages. |
| Rated Frequency | 50Hz (Standard) / 60Hz (Export) | Fully customizable to meet domestic or international grid frequencies. |
| Vector Group | Dyn11 (Preferred) / Yyn0 | Dyn11 suppresses harmonics and excels under severe phase imbalances. |
| Insulation Class | Class F (155℃) / Class H (220℃) | Determines the maximum allowable winding temperature limits. |
| Cooling Method | AN (Natural Air) / AF (Forced Air) | Smart controllers auto-engage fans typically around 100℃ to rapidly cool the core. |
Full Series Technical Parameters (SCB13 10kV 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 |
| 63 | 4.0 | 180 | 1030 | 360 | 900×650×950 |
| 100 | 4.0 | 220 | 1400 | 550 | 950×700×1000 |
| 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 |
| 630 | 4.5 | 810 | 5880 | 1950 | 1350×1000×1350 |
| 800 | 4.5 | 980 | 7100 | 2300 | 1400×1000×1400 |
| 1000 | 4.5 | 1150 | 8600 | 2700 | 1450×1050×1450 |
| 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 the standard SCB13 dry-type platform spanning from 30kVA to 3150kVA. By activating the Forced Air (AF) cooling fans, all listed capacities can safely surge their output by an additional 30% to 50%.
FAQ
The air-cooled dry-type transformer relies on an integrated smart temperature controller linked to PT100 thermistors embedded within the low-voltage windings. The automated logic guarantees safety without manual intervention:
1) Fan Activation (Approx. 100℃): During normal loads, the unit relies purely on Natural Air (AN) convection. If the load increases and the winding temperature reaches approximately 100℃, the controller automatically starts the bottom-mounted Forced Air (AF) fans. This instantly boosts the cooling efficiency, allowing the transformer to carry up to 1.5x its rated load.
2) Fan Deactivation (Approx. 80℃): As the peak load passes and the high-velocity air drops the winding temperature down to around 80℃, the fans will automatically shut off to conserve energy and reduce noise.
3) Overheat Protections: If the temperature continues to rise despite the fans running, the controller will issue an audible/visual Alarm at 130℃. If extreme conditions push the temperature to the critical threshold of 150℃, it will trigger an automatic Trip, instantly disconnecting the circuit to prevent irreversible insulation damage.
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
