In the modern electrical landscape, the shift toward safety and environmental sustainability has pushed dry transformers to the forefront. Unlike their oil-filled predecessors, these units are fire-resistant, moisture-proof, and virtually maintenance-free.
But what exactly happens inside that metal enclosure? At FIJ TECH, we believe that understanding the internal engineering is key to selecting the right equipment for your infrastructure. Here is a detailed look at the core components that make our dry-type transformers the gold standard for reliability.
1. The Magnetic Heart: The Core
The core is the “engine room” of the transformer. Its primary job is to provide a low-reluctance path for the magnetic flux.
At FIJ TECH, we utilize high-quality, cold-rolled grain-oriented (CRGO) silicon steel sheets. To maximize efficiency, these sheets are stacked using a 45-degree full-mitred joint design. This precision engineering significantly reduces no-load losses and minimizes the “humming” noise often associated with high-voltage equipment.
2. Advanced Winding Technology
Windings are where the conversion happens. Depending on the application, we offer both Copper and Aluminum options.
- High-Voltage (HV) Windings: These typically utilize a multi-layer cylindrical or segmented structure to handle high-stress environments.
- Low-Voltage (LV) Windings: For superior mechanical strength during short-circuit events, we often employ a foil-winding structure. This ensures the transformer can handle the thermal and physical rigors of industrial use.
3. The Insulation System (SCB vs. SGB)
Insulation is what defines a “dry” transformer. We specialize in two primary formats:
- Cast Resin (SCB Series): The windings are vacuum-cast in epoxy resin. This creates a solid, maintenance-free block that is impervious to dust and moisture—perfect for harsh indoor environments.
- Open Wound (SGB Series): Using glass-fiber reinforced insulation, these offer excellent heat dissipation and are often preferred for specific high-reliability industrial sectors.
4. Intelligent Thermal Management
Heat is the enemy of longevity. Our systems integrate a sophisticated Temperature Control Unit (TCU) that acts as the brain of the machine.
The system supports two cooling modes:
- Air Natural (AN): Operates under normal rated capacity without external help.
- Air Forced (AF): When the load spikes, the TCU triggers high-speed fans to boost cooling capacity, allowing the transformer to handle emergency overloads safely.
Pro Tip: Our sensors include auto-alarm and trip functions. If temperatures exceed safe thresholds, the system automatically shuts down to prevent permanent damage to the insulation.
5. Protective Enclosures (IP Ratings)
The external housing isn’t just for aesthetics; it’s a shield. We offer various protection levels based on your site requirements:
- IP20: Prevents solid foreign objects (like tools or fingers) from entering.
- IP23: Adds protection against water spray at angles up to 60°, ideal for more demanding environments.
6. Customization & Accessories
To further optimize performance, FIJ TECH units can be outfitted with specialized accessories, including:
- EMI Filters for sensitive electronics.
- DC/AC Reactors to improve power quality.
- Vibration Dampers for high-rise or hospital installations.
Why Choose FIJ TECH?
As a dedicated manufacturer, FIJ TECH doesn’t just assemble parts; we engineer solutions. By controlling every step of the process—from the mitered cut of the core to the vacuum casting of the resin—we ensure that our Dry transformers provide stable, efficient power for decades.
Looking for a technical consultation or a quote for your next project? [Contact the FIJ TECH Today]