High-Efficiency Oil-Immersed Power Transformers
Fully hermetically sealed corrugated tank design with low-loss grain-oriented silicon steel cores. Compliant with IEC 60076, GB/T 1094, and GOST standards, providing proven operational stability from Siberian freezes down to -40°C up to scorching desert climates.
Engineered for Zero Maintenance & 30+ Year Lifecycle
Unlike conventional conservator-tank transformers where insulation oil contacts ambient moisture and oxygen, AIKey hermetically sealed transformers utilize the elastic expansion and contraction of the corrugated tank walls to compensate for oil volume changes during load cycles.
- ✓ Laser-Cut Silicon Steel Core: Baosteel high-permeability grain-oriented sheets with 45° step-lap mitred joints, cutting no-load current by 30%.
- ✓ 100% Oxygen-Free Electrolytic Copper: High electrical conductivity (IACS ≥ 100%), reinforced paper insulation with superior thermal endurance.
- ✓ Vacuum Oil Impregnation: Complete deaeration and dehydration process ensures zero gas bubbles inside the windings, with breakdown voltage ≥ 45kV.
- ✓ C5-M Marine Anti-Corrosion Treatment: Shot blasting + zinc-rich epoxy primer + polyurethane multi-layer baking withstands humid and saline atmospheres.
Tier-1 Energy Efficiency: S11 vs S13 vs S20 vs S22 Comparison
Evaluate no-load and load loss reductions to optimize total cost of ownership (TCO) across utility and private electrical grids.
| Product Series | Efficiency Tier | No-Load Loss (Po) | Load Loss (Pk) | Typical Application |
|---|---|---|---|---|
| S11 Series | Baseline Standard | Standard Level | Standard Level | General industrial facilities and budget-sensitive retrofits |
| S13 Series | High Efficiency (Tier 3) | -25% to -30% vs S11 | Standard Level | Urban distribution grids, commercial complexes, schools |
| S20 Series | Ultra-Low Loss (Tier 2) | -35% to -40% vs S11 | -10% vs S11 | Utility solar PV step-up, wind farms, data centers |
| S22 Series | Top Tier Eco-Design (Tier 1) | -45% to -52% vs S11 | -15% vs S11 | Zero-carbon microgrids, mission-critical infrastructure |
| SZ11 / SZ13 Series | On-Load Tap Changer (OLTC) | Low Loss with OLTC | Standard Level | Grids with wide voltage fluctuations requiring automatic regulation (±8×1.25%) |
10kV Series Oil-Immersed Distribution Transformers Technical Parameters (S13 / S20 Series)
| Rated Capacity (kVA) | Primary Voltage (kV) | Secondary Voltage (V) | Vector Group | S13 Po (W) | S20 Po (W) | Load Loss Pk 75°C (W) | Impedance Uk (%) |
|---|---|---|---|---|---|---|---|
| 30 | 10, 10.5 ± 5% | 400 / 230 | Dyn11 / Yyn0 | 80 | 65 | 540 | 4.0 |
| 50 | 10, 10.5 ± 5% | 400 / 230 | Dyn11 / Yyn0 | 115 | 90 | 780 | 4.0 |
| 100 | 10, 10.5 ± 5% | 400 / 230 | Dyn11 / Yyn0 | 180 | 145 | 1,350 | 4.0 |
| 160 | 10, 10.5 ± 5% | 400 / 230 | Dyn11 / Yyn0 | 255 | 205 | 1,980 | 4.0 |
| 250 | 10, 10.5 ± 5% | 400 / 230 | Dyn11 / Yyn0 | 350 | 280 | 2,800 | 4.0 |
| 400 | 10, 10.5 ± 5% | 400 / 230 | Dyn11 / Yyn0 | 500 | 405 | 4,000 | 4.0 |
| 630 | 10, 10.5 ± 5% | 400 / 230 | Dyn11 / Yyn0 | 720 | 580 | 5,750 | 4.5 |
| 800 | 10, 10.5 ± 5% | 400 / 230 | Dyn11 / Yyn0 | 870 | 700 | 6,900 | 4.5 |
| 1000 | 10, 10.5 ± 5% | 400 / 230 | Dyn11 / Yyn0 | 1,030 | 830 | 8,300 | 4.5 |
| 1250 | 10, 10.5 ± 5% | 400 / 230 | Dyn11 / Yyn0 | 1,230 | 990 | 10,000 | 4.5 |
| 1600 | 10, 10.5 ± 5% | 400 / 230 | Dyn11 / Yyn0 | 1,490 | 1,210 | 12,400 | 4.5 |
| 2000 | 10, 10.5 ± 5% | 400 / 230 | Dyn11 / Yyn0 | 1,780 | 1,440 | 15,200 | 5.0 |
| 2500 | 10, 10.5 ± 5% | 400 / 230 | Dyn11 / Yyn0 | 2,150 | 1,730 | 18,500 | 5.0 |
* Note: 20kV and 35kV voltage ratings up to 31,500 kVA (SZ11/SZ20 on-load tap changers) are custom manufactured to tender specifications.