The 630kVA 6.6/0.4kV Oil-Immersed Distribution Transformer is designed for industrial plants, commercial buildings, utility substations, renewable energy projects, and infrastructure applications. It provides reliable voltage conversion from 6.6kV medium voltage networks to 400V low-voltage distribution systems, ensuring stable and efficient power supply.
The 630kVA 6.6/0.4kV oil-immersed distribution transformer is designed for reliable medium-to-low voltage power conversion in industrial, commercial, and utility distribution systems. It steps down 6.6kV medium voltage to 400V low voltage, providing stable and efficient electricity supply for various end-user applications.
Built with a high-quality silicon steel core and vacuum oil-immersed insulation system, the transformer ensures low no-load loss, low noise, and excellent thermal performance. The ONAN cooling method guarantees safe and continuous operation under heavy load conditions, even in harsh outdoor environments.
This transformer is widely used in factories, infrastructure projects, renewable energy systems, mining operations, and commercial power distribution networks. It supports customizable configurations such as vector group (Dyn11), tap changer range, enclosure type, and protection level to meet different project requirements.
With strong short-circuit resistance and long service life, the 630kVA distribution transformer delivers high efficiency, safety, and long-term operational stability for modern power systems.
Zisheng are a professional 19+ years manufacturer in producing Oil-Immersed Transformers, Compact Substation, Pad Mounted Transformers, Pole Mounted Transformers and Dry Type Transformers. We own the certificates of ISO/CE/IEC 60076 and TUV Rheinland.
Transformers undergo rigorous FAT and type testing, support voltage/capacity customization. Welcome to consult for Catalog and Product. you can contact us at email [email protected].
Project: Industrial Power Distribution Upgrade
Location: Southeast Asia
Transformer Model: 630kVA 6.6/0.4kV Oil-Immersed Transformer
Application: Factory Power Supply System
Customer Requirements:
Solution:
A customized 630kVA oil-filled distribution transformer with Dyn11 vector group and low-loss silicon steel core was supplied to support the customer’s production facility.
Result:
| Item | Specification |
|---|---|
| Rated Capacity | 630kVA |
| High Voltage | 6.6kV |
| Low Voltage | 0.4kV |
| Frequency | 50Hz / 60Hz |
| Phase | Three Phase |
| Cooling Method | ONAN |
| Vector Group | Dyn11 (Optional) |
| Insulation Class | Class A |
| Impedance Voltage | 4%–6% |
| Tapping Range | ±2×2.5% or ±5% |
| Transformer Type | Oil-Immersed |
| Standards | IEC 60076 / ANSI / IEEE |
It is widely used in industrial plants, commercial buildings, utilities, renewable energy projects, and infrastructure power distribution systems.
Yes. Voltage, frequency, vector group, tap changer, impedance, and enclosure options can be customized according to project requirements.
IEC 60076, ANSI, IEEE, and other international standards upon request.
Standard cooling is ONAN (Oil Natural Air Natural).
Yes. It is commonly used in renewable energy power distribution systems and grid connection projects.
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