20KV Series Cast Resin Dry Type Transformer

The 20kV resin-cast dry-type transformer series represents advanced power distribution technology, specifically engineered for reliable electricity transmission and distribution in modern grid systems. Utilizing vacuum pressure impregnation (VPI) technology with epoxy resin encapsulation, these transformers deliver exceptional performance in diverse electrical applications.

1. Standards Compliance: GB, IEC, GOST, EN, NF, ANSI/IEEE (Customizable to client specifications)
2. Certifications: ISO, CE, IEC, SABS, COC, CSA, UL
3. High Insulation Strength: Epoxy resin casting provides 18-22KV/mm dielectric strength with lightning impulse withstand comparable to oil-immersed transformers. Class F insulation (155°C max) with 100K winding temperature rise limit.
4. Exceptional Short-Circuit Resistance: Solid resin casting creates monolithic winding structures with proven mechanical strength, demonstrating superior performance in short-circuit tests.
5. Fire Safety Excellence: Self-extinguishing epoxy resin prevents fire propagation and eliminates explosion risks.
6. Environmental Resilience: Chemically inert construction withstands 100% humidity and contaminated atmospheres without requiring drying after shutdown.
7. Maintenance-Free Operation: Integrated temperature/humidity monitoring systems enable completely unmanned operation with minimized lifecycle costs.
8. Overload Capability: 1.16× continuous overload capacity at 20°C ambient, with 1.5× short-term overload (60 mins) extendable with forced air cooling (AF mode).
9. Additional Benefits: Low losses (<70dB noise), compact footprint, simplified installation (no core inspection required), and high energy efficiency (up to 99%).

1. Intrinsic Safety: Non-flammable construction eliminates toxic emissions and fire hazards, with immunity to moisture/dust contamination and guaranteed freedom from partial discharge or cracking.
2. Premium Reliability: NOMEX/VPI-treated H-class (180°C) windings with C-grade (220°C) insulation materials ensure outstanding short-circuit withstand and overload capacity.
3. Eco-Efficient Design: Advanced grain-oriented steel, foil windings, and stepped-core construction deliver industry-leading efficiency (≤55dB) through optimized electromagnetic performance.
4. Proven Durability: Rigorous R&D in thermal modeling, partial discharge control, and manufacturing processes ensures >30-year service life with reliability-certified performance.
5. Modular Configurations: Flexible integration options include air-cooling systems, protective enclosures, SCADA interfaces, metering CTs, and busway connections.
6. Superior Surge Protection: Enhanced inter-disc capacitance (3.5-4× higher than air-insulated designs) ensures optimal voltage gradient distribution during lightning/switch surges.
7. Corrosion Immunity: Complete conductor encapsulation provides IP54-rated protection against chemical/industrial atmospheres for harsh environment deployment.
8. High-Voltage Capability: 250kV BIL rating supports applications up to 66kV class, outperforming conventional dry-type alternatives limited to 35kV applications.

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