Product Introduction
This 11kV/415V, 50Hz oil-immersed three phase 500kVA transformer is engineered to comply with Nigerian distribution network standards, supporting stable power step-down under high-ambient tropical conditions.
Scope of Supply
Product Category: Liquid-Immersed Distribution Transformer
Phase Configuration: Three-Phase
Rated Capacity: 500 kVA
Primary Voltage: 11KV
Secondary Voltage: 415V
Vector Group: Dyn11
Customizable Production: Yes
Key Advantages
- Thermal Overload Resilience: Optimized radiator oil-convection channels and high-flashpoint mineral insulation oil sustain short-term cyclic overloads during regional peak demand spikes.
- Extended Voltage Regulation: Configured with a ±2×2.5% off-circuit tap changer (NLTC) to counteract local grid voltage drops.
- Harmonic Distortion Tolerance: Reinforced mechanical winding clamping and core mitering mitigate magnetic flux distortion and vibration caused by non-linear industrial loads.
Applications
| Application | System Integration | Primary Benefit |
|---|---|---|
| Power Utilities | Grid distribution and local substations | Minimizes no-load core losses |
| Heavy Industry | Manufacturing and chemical plant processing | High short-circuit thermal withstand capacity |
| Transportation | Rail, airports, and seaport infrastructure | Sustains heavy cyclic loading profiles |
| Commercial Buildings | Data centers, hospitals, and residential areas | High heat dissipation under high-density loads |
| Renewable Energy | Photovoltaic and wind grid-tie systems | Mitigates non-linear harmonic distortion |
Technical Specifications
|
Model |
S-M-500kVA-11/0.415 |
|
Type |
Oil Immersed Power Transformer |
|
Standard |
IEC60076 |
|
Rated Power |
500kVA |
|
Frequency |
50HZ |
|
Phase |
Three |
|
Cooling Type |
ANAF |
|
Primary Voltage |
11 KV |
|
Secondary Voltage |
0.415KV |
|
Winding Material |
aluminium |
|
Vector Group |
Dyn11 |
|
Impedance |
4% |
|
Tap Changer |
NLTC |
|
Tapping Range |
±2*2.5% @ Primary Side |
|
No Load Loss |
0.680 KW |
|
On Load Loss |
5.41KW |
|
Accessories |
Standard Configuration |
System Engineering Design
Engineering Workflow:
| Phase 1: Drawing Design - Engineers design tailored electrical and structural schematics. |
| Phase 2: Iron Core Production - Silicon steel sheets cut and stacked precisely. |
| Phase 3: Winding Production - Automated machines wind high and low-voltage coils. |
| Phase 4: Tank Production - Steel enclosures are fabricated, welded, and sealed. |
| Phase 5: Customized Accessories Preparation - Bushings, radiators, and tap changers inspected. |
| Phase 6: Transformer Assembly - Core, windings, and tank fully integrated. |
| Phase 7: Experimental Testing - Units undergo full routine electrical testing. |
| Phase 8: Packaging & Shipping - Transformers are dried, sealed, and securely packaged. |
Engineering Drawings & Schematics
Iron Core
Coil Winding
Transformer assembly
Transformer Tank
FAQ
Q: What quality documentation is provided before this Three Phase 500 Kva Transformer ships?
A: Each unit ships with a certified Factory Acceptance Test (FAT) report covering routine dielectric and loss measurements.
Q: How is this Three Phase 500 Kva Transformer protected against moisture during ocean transit?
A: Transformers are vacuum-dried, nitrogen-sealed, and packed in heavy-duty seaworthy wooden cases with moisture-absorbent desiccants.
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