3-Phase Oil Immersed Distribution Transformers
20/0.4kV 630kVA Oil Immersed Distribution Transformer is designed for medium-voltage power distribution networks in Albania and other European markets. Featuring a Dyn11 vector group and aluminum (AL) windings, the transformer provides reliable voltage conversion from 20kV to 0.4kV. The oil immersed structure provides effective insulation and heat dissipation, making it suitable for industrial facilities, commercial buildings, residential areas and distribution substations.
Basic Info.
The 20/0.4kV 630kVA oil immersed distribution transformer is a three-phase step-down transformer designed for medium-voltage distribution systems. It adopts a 20kV high-voltage winding and 0.4kV low-voltage winding, with Dyn11 vector group and aluminum (AL) windings.
The oil immersed construction provides electrical insulation and natural heat dissipation during transformer operation. The transformer is suitable for outdoor distribution applications and can be integrated into conventional substations or prefabricated distribution substations according to project requirements.
Typical Applications
· Industrial plants and manufacturing facilities
· Commercial buildings and business complexes
· Residential areas and community power supply
· Medium-voltage distribution substations
· Public infrastructure projects
· Renewable energy and solar power distribution projects
Performance parameters for reference
| Parameter / Feature | Technical Standard & Specification |
| Primary Rated Voltage | 20 kV |
| Secondary Rated Voltage | 0.4 kV |
| Rated Capacity | 630 kVA |
| Phase & Frequency | 3-Phase, 50Hz |
| Vector Group | Dyn11 |
| Cooling Method | ONAN |
| Winding Material | AL (Aluminum) |
| Standard | IEC 60076 |
We follow established manufacturing and quality control procedures to ensure that each transformer meets the specified technical requirements before delivery.
1.Factory Testing
Each transformer undergoes routine factory inspection and testing before dispatch. Testing can include winding resistance, voltage ratio, phase displacement, no-load loss, load loss, insulation and dielectric withstand tests according to the applicable technical specification.
2.Packing & Delivery
The transformer is professionally packed and securely fixed before shipment. Protective measures are applied to safeguard the tank, bushings, radiators and other external components during transportation and delivery to the project site in Albania.
FAQ
Q1 What is the rated capacity of this transformer?
A1 The rated capacity is 630kVA, with a rated voltage of 20kV on the high-voltage side and 0.4kV on the low-voltage side.
Q2 What is the vector group of this transformer?
A2 The transformer adopts a Dyn11 vector group, which is commonly used for three-phase distribution transformer applications.
Q3 What winding material is used?
A3 The transformer uses aluminum (AL) windings according to the project specification.
Q4 What cooling method is adopted?
A4 The standard cooling method is ONAN, Oil Natural Air Natural, using natural circulation of transformer oil and surrounding air for heat dissipation.
Q5 Where can this 630kVA transformer be used?
A5 It is suitable for medium-voltage distribution networks, industrial plants, commercial buildings, residential areas, public infrastructure and distribution substations in Albania and other European markets.
Q6 Can the transformer be customized?
A6 Yes. Transformer voltage, impedance, losses, tap range, accessories and other technical parameters can be configured according to the customer's project requirements.
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