RW Series VPI Dry-Type Transformers: Uncompromising Protection Through Vacuum Pressure Impregnation Technology
Technical Solution: RW Series Vacuum Pressure Impregnation (VPI) Dry-Type Transformers
I. Core Technological Innovations
Defect-Free Insulation System
Utilizes Vacuum Pressure Impregnation (VPI) process to cast high-density epoxy resin, achieving void-free solidified insulation.
Partial discharge levels stably controlled at <10 pC (IEC 60076-11 standard).
Insulation thermal class reaches Class H (180°C), with insulation performance degradation rate ≤5% throughout the lifespan.
Robust Environmental Adaptability Structure
Integrated casting and sealing technology, achieving IP54 protection (resists persistent dust ingress and water splashing from all directions).
Flame-retardant grade F1 (per GB/T 2207 standard testing, no sustained combustion under 900°C open flame).
Wide operating temperature range: -25°C to +40°C (no derating required in areas at ≤1000m altitude).
Energy Efficiency Optimization Design
≥15% reduction** in no-load losses for SCBH15/SCB14 series compared to GB 20052 energy efficiency standard.
Measured data (1000kVA): No-load loss ≤0.40kW, Load loss ≤7.8kW.
Dynamic load loss optimization technology, achieving efficiency ≥98.5% within the 35%~100% load range.
Intelligent Maintenance System
Embedded PT100 platinum resistors in windings (IEC 60751 Class A accuracy, temperature measurement error ±1°C).
Supports Modbus RTU/TCP protocols. Enables via IoT gateway:
Real-time winding hot-spot temperature monitoring.
Three-phase unbalance analysis.
Dynamic load-rate energy efficiency assessment.
II. Scenario-Based Application Advantages
Application Scenario |
Core Problem Solved |
Technical Implementation Path |
General Industry |
Metal dust erosion; Frequent equipment starts/stops |
IP54 housing seal + VPI pollution-resistant structure |
Commercial Complexes |
Stringent fire codes; Compact space |
F1 flame-retardant grade + Compact design (28% footprint reduction) |
Data Centers |
Harmonic pollution (THDi ≤8%); Require 7×24 stable power |
Anti-harmonic magnetic circuit design + ±2°C temperature control accuracy |
III. Life Cycle Cost Optimization
Parameter |
Oil-Immersed Transformer |
This Solution |
Benefit Comparison |
Maintenance Cycle |
Every 2 years |
Maintenance-free |
Saves ￥40k/year in maintenance |
Failure Rate |
0.8 per 1000 units/year |
0.2 per 1000 units/year |
60% reduction in downtime losses |
Residual Value (20 yrs) |
30% |
55% |
25% increase in asset value |
Total Cost of Ownership |
Benchmark |
30% lower |
|
(Validated by TCO Model) |
IV. Engineering Validation Data
Accelerated Aging Test: Continuous operation for 5000 hours at 40°C/85% RH; Insulation resistance maintained ≥1000 MΩ.
Seismic Performance: Passed Class II seismic test per GB/T 13540 standard (horizontal acceleration 0.3g).
Noise Control: ≤55 dB(A) noise level during operation at 1000kVA load (measured at 1m distance).
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