Views: 0 Author: Site Editor Publish Time: 2025-05-09 Origin: Site
With the advancement of carbon neutrality goals, transformer energy efficiency has become a core metric for enterprises to reduce operational costs and fulfill social responsibilities. Based on national standards like GB 20052-2024, this article provides an in-depth analysis of energy efficiency classes, testing methods, and selection strategies to help users achieve energy savings.
Class 1 (NX1): Internationally leading level, 30-50% lower no-load/load losses than Class 3.
Class 2 (NX2): Domestically advanced, suitable for stable long-term loads.
Class 3 (NX3): Market entry threshold; outdated models (e.g., S11) will be phased out post-2025.
Labeling: Mandatory blue-white energy efficiency labels on product surfaces.
Metric | GB 20052-2020 | GB 20052-2024 (2025 Implementation) |
Scope | Grid transformers | Adds renewable-specific transformers (PV/wind/storage) |
Load Loss (10kV Oil) | 1,800W (2,500kVA, Class 1) | 1,650W (8.3% improvement) |
Testing | Standard temperature tests | Harmonic-adjusted loss measurements |
Top Models:
SCB18 (Class 1): 20% lower no-load loss vs. SCB10.
SCBH19 (Amorphous alloy): 15% lower load loss, ideal for data centers.
Applications: Hospitals, subways, commercial buildings (IP54+).
Top Models:
SH25 (Amorphous alloy): 70% lower no-load loss vs. S13, 40-year lifespan.
S22 (CRGO steel): Cost-effective for industrial parks.
Innovation: β-oil (fire point 300°C) replaces mineral oil, certified for -40°C.
No-load Loss: ZSTE-9500 tester (±0.2% accuracy, temperature/waveform calibrated).
Load Loss: Measured under ≤5% THD, normalized to 75°C.
Impedance: ≥6% for renewable transformers (grid stability).
Third-party testing (e.g., CTI/STL).
Energy label registration (China Energy Label Portal).
Annual audits (>5% failure rate triggers disqualification).
Application | Recommended Class | Annual Savings | Payback Period |
Data Centers | Class 1 (SCB18) | ¥120,000/unit | 2.3 years |
PV Step-Up | Class 2 (S22) | 18% lifecycle | 4.1 years |
Urban Distribution | Class 3 (S13) | Low upfront cost | N/A |
Formula: TCO = Purchase Cost + 20-Year Energy Cost + Maintenance.
Class 1: 25-30% lower TCO vs. Class 3.
Subsidies: Up to 10% rebates for Class 1 in select provinces.
2025: New transformers must meet ≥Class 2.
2027 Goal: ≥80% high-efficiency adoption (MIIT’s Transformer Efficiency Plan).
Materials: Amorphous/nanocrystalline cores (30% lower no-load loss).
Smart Features: DGA monitoring (≥95% fault prediction accuracy).
Sustainability: Biodegradable insulation oil (50% lower carbon footprint).
Conclusion
Transformer energy efficiency is both a technical benchmark and a cornerstone of corporate sustainability. Selecting optimal classes can reduce lifecycle costs by 15-40%. Driven by policies and innovation, high-efficiency transformers will dominate the market.
(Contact our engineering team for customized efficiency solutions or testing services.)
