English 
 |
loading
Manufacturer: Pearl Electric (China-based, trusted supplier)
Type: Oil-immersed distribution transformer
Capacity: 40 MVA / 50 MVA
Technical Advantages: Cooling System, on-load tap changers(OLTC)
| Availability: | |
|---|---|
| Quantity: | |
1. Product Overview
Capacity Range: 40-50 MVA
Voltage Classes:
Primary: 33kV/66kV/110kV (customizable)
Secondary: Project-specific configurations
Cooling Type: Oil-immersed (ONAN standard, ONAF optional)
Phase Configuration: Three-phase systems
2. Key Technical Speccifications
| Feature | Specification |
| Tap Changer | On-load tap changer (OLTC) with ±4×1.25% regulation |
| Insulation Class | Class A (up to 105°C) |
| Core Material | CRGO silicon steel (M5/MOH/HI-B grade, 0.23-0.30mm) |
| Conductor Options | Copper/aluminum LV foil/HV rectangular/round conductors |
| Protection System | Integrated fuse protection for overload/short circuit |
| Tank Design | Radiator or corrugated wall options |
| Paint System | RAL 7033 standard (custom colors available) |
3. Advanced Features
Electrical Performance
Optimized step-lap core construction reduces no-load losses by 15-20%
DDP resin-coated windings with special Kraft paper insulation
Impulse voltage withstand up to 250kV
Mechanical Design
Corrugated tank walls or bolt-on radiators
Vacuum-dried insulation system (<1% residual moisture)
Double-layer corrosion-resistant painting (120μm minimum)
4. Performance Advantages
Efficiency: <0.8% no-load losses, >99.3% efficiency at full load
Reliability: 30-year design life with proper maintenance
Safety:
Pressure relief valve (7psi withstand)
Buchholz relay optional
Environmental:
Noise level <65dB
Compatible with FR3 vegetable oil
1.Core Assembly
Laser-cut CRGO laminations
Step-lap mitered joints
Zinc-coated clamping frames
2.Winding Process
LV: Helical or foil windings
HV: Continuous disc or layer windings
Vacuum pressure impregnation
3.Quality Control
Routine tests per IEC 60076
Special tests available:
Lightning impulse
Temperature rise
Short-circuit withstand
| Sector | Typical Installation | Special Requirements |
| Grid Infrastructure | Substations | OLTC with SCADA interface |
| Industrial Plants | Process lines | High short-circuit withstand |
| Renewable Energy | Solar/Wind farms | Low-loss design |
| Commercial | Data centers | Reduced fire risk option |
| Parameter | Value |
|---|---|
| Primary Voltage | 33KV or Customized |
| Capacity | 40MVA to 50MVA |
| Taps | ±4x2.5% (On-load tap changer) |
| Frequency | 50Hz or 60Hz |
| Phases | Three-Phase |
| Vector Group | Yd11, YNd11 |
| Cooling | ONAN |
| Insulation Class | A-Class |
| Temperature Rise | 60/65K |
| Insulation Material | Mineral oil, FR3 Oil, or Silicone |
| Winding Material | Copper or Aluminum |
| Standards | IEC60076 or Local standard |
TECHNICAL DATASHEET FOR POWER TRANSFORMER
Model | Rated Voltage(KV) | Uk(%) | P0 [W] | Pk[W] | |
H.V | L.V | ||||
SZ-2000/35 | 34.5 35 38.5 | 6.3 10.5 11 | 6.5 | 2310 | 19240 |
SZ-2500/35 | 2750 | 20640 | |||
SZ-3150/35 | 7.0 | 3230 | 24710 | ||
SZ-4000/35 | 3870 | 29160 | |||
SZ-5000/35 | 4640 | 34200 | |||
SZ-6300/35 | 7.5 | 5630 | 36770 | ||
SZ-8000/35 | 7870 | 40610 | |||
SZ-10000/35 | 9280 | 48050 | |||
SZ-12500/35 | 8.0 | 10940 | 56860 | ||
SZ-16000/35 | 13170 | 70320 | |||
SZ-20000/35 | 15570 | 82780 | |||
FAQs:
Q: What are the advantages of the oil-immersed design?
A: The oil-immersed design provides efficient cooling, enhances durability, and ensures reliable operation under high-load conditions.
Q: Does the transformer comply with international standards?
A: Yes, the transformer complies with IEC, IEEE, and other international standards for safety, performance, and efficiency.
Q: What cooling system does the transformer use?
A: It uses an oil-immersed cooling system, available in ONAN (Oil Natural Air Natural) or ONAF (Oil Natural Air Forced) configurations for efficient heat dissipation.
Q: Is the transformer suitable for outdoor installation?
A: Yes, the transformer is designed with a weatherproof and fully sealed structure, making it ideal for both indoor and outdoor installations, even in harsh environments.
Q: Can this high-capacity oil-immersed transformers be customized?
A: Yes, transformers can be customized to specific requirements, including winding material (copper or aluminum) and insulation options (mineral oil or FR3 oil).
