YIMAI Oil-Immersed Power Transformer | Three-Phase Distribution Transformer 10kV~35kV 50kVA~2500kVA

Product Overview

Core Technical Advantages

1. High-Efficiency & Low Loss Design
   • Uses high-permeability grain-oriented silicon steel laminations to minimize no-load loss and excitation current.
   • Copper windings with high conductivity reduce load loss, achieving energy efficiency up to 99%, significantly lowering operational costs and carbon footprint.
   • Optimized oil circulation design ensures efficient heat dissipation, allowing continuous operation at full load even in high-temperature environments.
2. Fully Sealed & Maintenance-Free Structure
   • The tank is fully sealed with a corrugated fin or expansion conservator, preventing oil oxidation and moisture ingress, eliminating the need for regular oil top-ups or maintenance.
   • Hermetic sealing extends the transformer’s service life to 30+ years, reducing total ownership costs.
3. Superior Insulation & Safety Performance
   • Mineral oil insulation provides excellent dielectric strength and thermal conductivity, protecting windings from electrical breakdown and overheating.
   • High-voltage bushings (porcelain or composite) ensure reliable insulation and resistance to pollution, lightning, and short-circuit forces.
   • Built-in protection devices: oil level gauge, pressure relief valve, temperature indicator, and Buchholz relay (for gas detection) to prevent catastrophic failures.
4. Strong Short-Circuit Resistance
   • Windings are tightly wound and reinforced with epoxy resin, providing exceptional mechanical strength to withstand the electromagnetic forces generated during short-circuit events, preventing winding deformation or damage.
   • Complies with IEC 60076-5 short-circuit withstand standards, ensuring system stability during grid faults.
5. Flexible Configuration & Customization
   • Supports multiple voltage ratios (e.g., 10kV/0.4kV, 20kV/0.4kV, 35kV/10kV) and connection groups (Dyn11, Yyn0, etc.) to meet different grid requirements.
   • Optional on-load tap changer (OLTC) or off-circuit tap changer allows voltage adjustment under load or no-load conditions, maintaining stable output voltage.
   • Can be customized with additional features: oil temperature monitoring, remote monitoring (RS485/Modbus), and anti-theft locks for outdoor installation.
6. Environmentally Friendly Design
   • Uses low-toxicity, biodegradable insulating oil (optional) to minimize environmental impact in case of leaks.
   • Low noise design (<55dB) meets urban environmental noise standards, suitable for installation in residential areas and city substations.

Technical Specifications (Typical Values)

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