Dry-type Transformer

Product Display

With the development of modern cities, electrical rooms—particularly those in high-rise buildings and structures requiring high fire safety ratings—must comply with stringent fire and explosion prevention regulations under fire safety codes. Dry-type transformers, owing to their inherent advantages such as fire resistance, explosion-proof design, pollution-free operation, and maintenance-free performance, have been widely adopted in:

• High-rise buildings
• Underground facilities
• Densely populated areas
• Humid environments

Consequently, the proportion of dry-type transformers in urban distribution systems has significantly increased in recent years.

Compliance with National Standards

This product series adheres to the following Chinese national standards:

1. GB 1094: Power Transformers
2. GB/T 10228: Technical Parameters and Requirements for Dry-type Power Transformers
3. GB 20052: Energy Efficiency Limits and Grades for Power Transformers

Energy Efficiency Classification

The current product series is categorized into three energy efficiency levels:

1. SCB18 Class I Efficiency (NX1): Ultra-high efficiency (aligned with IEC 60076-20 Tier 3).
2. SCB14 Class II Efficiency (NX2): Advanced efficiency (compatible with NEMA TP-1 requirements).
3. SCB12 Class III Efficiency (NX3): Standard efficiency (meeting baseline market demands).

Structural Features

Technical Features of Dry-type Transformers

1. HV/LV Cast Resin Coils:
   • Robust short-circuit resistance, minimal maintenance, high operational efficiency, compact footprint, and low noise levels.
   • Ideal for applications demanding fire and explosion prevention, such as commercial complexes and underground substations.
2. Advanced Casting Process:
   • Employs static mixing, vacuum casting, and positive-pressure techniques, ensuring superior mechanical and electrical performance compared to conventional vacuum casting without positive pressure.
3. Simulation-Optimized Design:
   • Core resonance analysis: Mitigates core cavity resonance to reduce noise (≤55 dB(A) per IEC 60076-10).
   • Lightning impulse simulation: Enhances lightning withstand capability (up to 170kV per IEC 60076-3).
   • Reduced partial discharge: Achieved by optimizing interlayer and segmental electric field distribution (PDIV ≥ 15kV).
4. Thermal Performance:
   • Thin-layer resin encapsulation prevents cracking and ensures efficient heat dissipation (temperature rise ≤ 80K under rated load).
5. Overload Capacity:
   • Class H insulation materials for HV/LV windings enable:
     • 110% continuous load in self-cooling mode.
     • 150% continuous load in forced air-cooling mode (per IEEE C57.96).
6. Intelligent Monitoring System:
   • Integrated temperature protection:
     • Real-time detection and display of three-phase winding temperatures.
     • Auto-start/stop cooling fans with alarm and trip functions (thresholds configurable via IEC 61850 protocols).
7. Design Advantages:
   • Aesthetic enclosure: Modern industrial design.
   • Space-saving: Compact dimensions reduce floor space requirements.
   • Cost-effective installation: Simplified deployment with minimal civil engineering.

Product Specification