1. Product Description
Type: Hermetically sealed step-up transformer
Key Feature: Fully sealed construction (oil/air-cooled)
Primary Use: Voltage boosting in harsh environments
Design Standards: IEC 60076, IEEE C57.12.00
2. Key Advantages
| Feature | Technical Benefit | User Advantage |
| Hermetic Sealing | IP67-rated enclosure | Resists moisture, dust, and chemical corrosion |
| Cooling Options | Oil-immersed (ONAN) or air-cooled (AN) | Flexible deployment in extreme temperatures (-40°C to +50°C) |
| Low Maintenance | No breather/vacuum sealing | 10+ years service interval |
| Rugged Design | Reinforced tank with anti-vibration mounts | Suitable for remote/windy locations |
3. Standard Accessories
Electrical: HV/LV bushings (porcelain/silicone), terminal box
Protection: Buchholz relay, pressure relief valve
Mechanical: Bi-directional rollers, lifting lugs
Fluid Management: Oil drain valve, sampling port
4. Testing Protocol
Factory Tests (Per IEC 60076)
Routine Tests:
Winding resistance measurement
Turns ratio & vector group verification
No-load loss/current tests
Dielectric Tests:
Quality Checks:
5. Typical Applications
| Sector | Use Case | Key Requirement Met |
| Renewables | Solar/Wind farm grid connection | Weatherproof operation |
| Industrial | Offshore oil platforms | Salt spray resistance |
| Utility | Mountain substations | -40°C cold start capability |
| Mining | Remote conveyor systems | Vibration/shock resistance |
6. Technical Datasheet
Items | Specifications |
| Production Descriptions | three phase hermetic step-up transformer |
Reference standards | IEC 60076 |
Capacity | up to 1600kVA |
Frequency | 50 Hz |
Voltage (HV) (kV) | 13.8kV |
Voltage (LV) (kV) | 0.66kV |
Impedance | 6% |
Connections (Vector Group) | Dyn11 |
Tapping Range | off-load Tap Changer, ± 2*2.5% on HV side |
Core materials | Silicon Steel |
Winding materials | Copper |
Lightning Impulse Withstand Voltage | 95/30 |
AC withstand voltage | 38/10 |
Insulation Class | A-class |
Temperature Rise | 60/65K |
| Cooling Method | ONAN |
