Industrial Energy Saving Three Phase Dry Type Distribution Transformer 500kVA 20kV/0.38kV for Textile Chemical and Automotive Manufacturing

This 500kVA 20/0.38kV three-phase dry type distribution transformer is engineered to deliver highly stable and energy-efficient power to sensitive industrial equipment. Built with vacuum cast coil technology and epoxy resin insulation, it is an ideal power solution for precision CNC machines, automated production lines and critical process machinery. Designed specifically for demanding environments in the textile, chemical, cement, electronics and automotive manufacturing sectors, this transformer ensures outstanding fire safety, moisture resistance and long-term operational reliability without the maintenance burden of oil-filled units.

• Exceptional Energy Efficiency - Low no-load and load losses help reduce electricity consumption and operating costs, aligning with global energy conservation standards for industrial power distribution.
• Superior Fire Safety - Epoxy resin encapsulated windings are self-extinguishing and eliminate the fire hazard associated with liquid insulation, making this transformer safe for indoor installation and high-risk zones.
• Robust Environmental Protection - The sealed cast coil design resists moisture, dust and airborne chemical agents, ensuring stable operation in the humid air of textile mills, the corrosive atmospheres of chemical plants and the heavy dust of cement factories.
• Custom Engineering Flexibility - Primary voltage, secondary voltage, vector group (e.g., Dyn11 or Yyn0), enclosure protection and winding material can all be tailored to match the exact requirements of your project or EPC specification.
• Low Maintenance and Quiet Running - Without oil to sample or filter, maintenance is minimal. The rigid cast construction also reduces vibration and noise, suitable for factories where a quiet environment supports worker comfort and productivity.

Technical concern: High ambient humidity, airborne lint fibers and fluctuating loads from spinning and weaving machines.

Our solution: The completely sealed epoxy resin winding surface repels lint accumulation and moisture ingress. Optional anti-condensation heaters and IP54 enclosures protect internal connections even when the transformer is off, while the robust cast coils handle frequent load variations without thermal degradation.

Technical concern: Corrosive fumes, explosive atmospheres and strict fire codes.

Our solution: The dry-type design contains no flammable oil, significantly reducing fire propagation risk. The epoxy cast winding is inherently resistant to chemical corrosion and provided with additional protective coating for harsh fume exposure. Fully sealed construction prevents internal contamination by aggressive gases, and the unit naturally meets the elevated safety requirements of chemical facilities.

Technical concern: Heavy conductive dust, continuous vibration from crushers and mills, and high ambient temperatures.

Our solution: Vacuum-cast coils form a solid, void-free block that prevents dust penetration. Reinforced core clamping and vibration-resistant structural bracing ensure mechanical integrity under constant shaking. High IP enclosure options and special terminal boxes maintain reliable isolation, delivering steady power to the most aggressive grinding and mixing operations.

Technical concern: Voltage instability, harmonic distortion and electromagnetic interference disrupting sensitive PCB assembly and semiconductor equipment.

Our solution: The transformer features a low partial discharge design and electrostatic shielding between primary and secondary windings, attenuating common-mode noise and harmonics. A stable output voltage with tight regulation under variable load conditions ensures clean power for high-precision soldering, pick-and-place and testing lines.

Technical concern: Fire safety in paint shops, high inrush currents from welding robots and presses, and low EMI for robotic control systems.

Our solution: The fire-resistant dry-type design is safe for paint booths and adjacent zones. The transformer is engineered with high short-circuit strength to withstand repetitive inrush currents without mechanical damage. Low electromagnetic interference emissions safeguard the sensitive servo drives and controllers used in robotic assembly and inline measurement systems.

A: Yes. The vacuum cast epoxy windings are inherently non-hygroscopic and lint-repellent. We also recommend incorporating anti-condensation heaters and an IP4X or IP54 enclosure. This combination prevents moisture ingress and fiber buildup on live parts, ensuring stable operation even when the transformer is intermittently shut down.

A: Absolutely. The solid epoxy resin encapsulation provides a chemical-resistant barrier around the high-voltage and low-voltage windings. There is no oil to leak or ignite, and additional anti-corrosion terminal surface treatments are available to withstand typical acidic or alkaline fumes found in chemical processing.

A: The core and coil assembly is securely clamped with high-tensile steel frames and vibration-damping pads. The cast windings form a monolithic structure that resists loosening over time. Terminations are made with flexible connectors, and all bolted connections employ locking washers. This robust construction ensures the transformer remains fully operational under continuous vibration.

A: Yes. Our custom design approach allows us to set your exact secondary voltage, such as 400V or 380V, and provide the required vector group (Dyn11, Yyn0, etc.) to match your plant's earthing system and CNC machine specifications. We also offer wide-range off-circuit taps for fine voltage adjustment.

A: Dry type transformers are virtually maintenance-free. We recommend an annual visual inspection, cleaning the winding surfaces with a vacuum cleaner, checking ventilation, and verifying bolt torque. No oil testing or filtration is required. This minimal maintenance maximizes uptime for robotic welding, painting and assembly stations.

A: Yes. We frequently supply EPC contractors with transformers pre-mounted inside weatherproof enclosures. The transformer can be delivered fully fitted in a containerized package substation with LV switchgear, ready for rapid on-site deployment. We provide complete mechanical drawings, lifting plans and remote commissioning support.