Oil-immersed Amorphous Planar Transformer

Product Display

Technical Overview of  Planar Transformers and Amorphous Alloy Energy-Efficient Models

1. Core Function of Transformers

Transformers enable the conversion of grid voltage to system- or load-specific voltage levels, facilitating efficient power transmission and distribution.

2. Amorphous Alloy Transformers

• Technology: Utilizes iron-based amorphous alloy cores with superior soft magnetic properties, achieving high energy efficiency (no-load losses ≤0.15W/kg).
• Standards Compliance:
  1. GB 1094: Power Transformers (equivalent to IEC 60076-1).
  2. GB/T 6451: Technical Parameters for Three-Phase Oil-immersed Power Transformers.
  3. GB/T 25446: Technical Parameters for Oil-immersed Amorphous Alloy Distribution Transformers.
  4. GB 20052: Energy Efficiency Limits and Grades for Power Transformers (aligned with IEC 60076-20).

3. Energy Efficiency Classification

The product series is categorized into three efficiency grades:

1. S25 Class I Efficiency (NX1): Ultra-high efficiency (compatible with IEC 60076-20 Tier 3).
2. S21 Class II Efficiency (NX2): Advanced efficiency (meeting NEMA TP-2 criteria).
3. S15 Class III Efficiency (NX3): Baseline efficiency for cost-sensitive applications.

Structural features

Amorphous Alloy Energy-Efficient Transformer

1. Amorphous Alloy Core Advantages

• Material properties:
  • Non-crystalline structure with low hysteresis loss and high resistivity, minimizing eddy current losses (core loss reduction ≥75% vs. S11-type transformers).
  • Compliant with IEC 60404-8-8 (magnetic materials).

2. Core & Winding Design

• Three-phase five-limb wound core:
  • Rectangular cross-section for optimized magnetic flux distribution.
• Winding configuration:
  • HV windings: Polyvinyl acetal enameled wire.
  • LV windings: Flat wire or copper foil construction, enhancing short-circuit withstand capability (≥25kA/3s per IEC 60076-5).

3. Electrical Performance

• Dyn11 connection group:
  • Suppresses higher-order harmonics (THD ≤3% per IEEE 519).
  • Robust load imbalance tolerance (≤10% phase deviation).
• Vacuum oil impregnation:
  • Eliminates air pockets in windings (degassing rate ≥99.9%, per IEC 60296).
  • Ensures stable dielectric strength (≥40kV AC/1min).

4. Advanced Cooling & Sealing

• Fin-type radiators:
  • Replace conventional oil ducts, improving heat dissipation efficiency (temperature rise ≤60K).
• Gas-filled cushion:
  • Installed atop the tank to compensate for oil expansion/contraction.
• Hermetic sealing:
  • IP55 protection (IEC 60529) prevents oil oxidation and moisture ingress.
  • Enables maintenance-free operation with extended service life (≥30 years).

Technical Performance Parameters