6kv 0.4kv 630kva 3 phase 2 winding oil immersed transformer
6kv 0.4kv 630kva 3 phase 2 winding oil immersed transformer
1. Product Description
The 6kv 0.4kv 630kva 3 phase 2 winding oil immersed transformer is a standard medium-voltage distribution power transformer designed for industrial and municipal power grid voltage conversion. As a core two-winding power conversion device, this three-phase oil-filled transformer features a rated capacity of 630kVA, with a high voltage input of 6kV and a low voltage output of 0.4kV, perfectly matching the voltage conversion demand between medium-voltage power grids and low-voltage power distribution systems.
Manufactured with high-quality silicon steel core and copper winding materials, this 6kV to 0.4kV oil immersed distribution transformer adopts a fully sealed oil-immersed cooling structure. It operates stably at a rated power frequency of 50Hz, with standard connection groups of Dyn11 and Yyn0, low no-load loss and low short-circuit loss. The whole machine complies with international electrical safety standards such as CE and ISO9001, featuring reliable insulation performance and stable output voltage, which can adapt to long-term continuous operation in various complex power supply environments. Different from single-phase transformers, this three-phase transformer realizes balanced three-phase power transmission, effectively avoiding voltage imbalance in power supply lines.
2. Core Purpose
The primary core purpose of the 6kv 0.4kv 630kva 3 phase 2 winding oil immersed transformer is to complete step-down voltage conversion of medium-voltage power grids, converting 6kV high-voltage industrial power into 400V low-voltage industrial and civilian usable power. It is a key intermediate device for power distribution systems to realize safe and efficient power transmission, solving the problem that medium-voltage grid voltage cannot be directly used by terminal electrical equipment.
As a high-efficiency 630kVA two-winding oil cooled transformer, it only undertakes single voltage level conversion without multi-stage voltage adjustment, ensuring simpler circuit structure and more stable operation. It can balance three-phase load current in real time, stabilize low-voltage terminal voltage, reduce power loss during power transmission, and improve the overall power supply efficiency of the distribution network. In addition, this medium voltage oil immersed transformer can effectively isolate high and low voltage circuits, prevent high voltage breakdown from damaging terminal equipment, and provide safe power guarantee for subsequent power distribution circuits and electrical loads.
3. Application Scenarios
This 6kv 0.4kv 630kva three-phase two-winding oil immersed transformer has a wide range of practical application scenarios, covering industrial production, municipal construction, commercial supporting and other mainstream power supply fields, and is one of the most commonly used capacity models in medium and small power distribution systems.
In the industrial field, it is widely used in factory power distribution rooms, manufacturing workshops, processing plants and industrial parks, providing stable low-voltage power for production equipment, mechanical motors, automation production lines and factory lighting systems, and adapting to the continuous power consumption demand of industrial production. In municipal engineering scenarios, it is applicable to urban community power distribution, rural power grid renovation, suburban power supply stations and street lamp power distribution systems, solving the daily power consumption demand of residents and public facilities.
Meanwhile, this 6kV/0.4kV oil immersed distribution transformer is also suitable for supporting power supply of commercial complexes, shopping malls, office buildings, schools and hospitals. It can also be used in temporary power supply scenarios such as construction sites, mining areas and highway engineering projects. Its sealed oil-immersed structure enables it to work normally in outdoor open-air environments and humid and dusty working conditions, with strong environmental adaptability.
4. Product Features
Stable Voltage Conversion Performance: As a professional 6kv step down to 0.4kv oil immersed transformer, it adopts optimized magnetic circuit design and high-precision winding winding process. The three-phase voltage balance is high, the output voltage fluctuation is small, and it can maintain stable voltage output under long-term full-load and partial-load operation, effectively avoiding equipment damage caused by voltage instability.
Low Energy Consumption and High Efficiency: The transformer uses high-permeability low-loss silicon steel sheets and high-purity copper windings, which greatly reduces no-load loss and load loss. Compared with traditional old-fashioned transformers, this energy-saving 630kVA oil filled transformer has lower power consumption during operation, effectively reducing the operating cost of power distribution systems and meeting modern energy-saving and emission-reduction standards.
Sealed and Maintenance-Free Structure: The fully sealed corrugated oil tank design prevents external air and moisture from entering the transformer body, avoiding transformer oil aging and insulation degradation. This maintenance-free oil immersed transformer does not need frequent oil replacement and internal cleaning in daily operation, greatly reducing later maintenance workload and maintenance cost, and extending the overall service life to more than 20 years.
Strong Environmental Adaptability: The whole machine has good dustproof, moisture-proof and corrosion-resistant properties, and can operate normally in the temperature range of -20℃ to +40℃. The oil-immersed self-cooling ONAF cooling mode does not rely on auxiliary cooling equipment, with low operating noise and strong heat dissipation capacity, which is suitable for indoor and outdoor installation environments.
Safe and Reliable Operation: Equipped with perfect insulation protection and over-temperature, over-current protection functions, the two-winding structure completely isolates high and low voltage loops, eliminating the risk of high voltage leakage. The product has passed multiple professional certifications, with high operational safety and strong overload resistance, and can cope with instantaneous load fluctuation in power supply systems.
5. Frequently Asked Questions (FAQ)
Q1: What is the difference between a two-winding oil immersed transformer and a three-winding transformer of the same capacity?
The 6kv 0.4kv 630kva 3 phase 2 winding oil immersed transformer only has one high-voltage winding and one low-voltage winding, realizing single 6kV to 0.4kV voltage conversion, with simpler structure, lower failure rate and lower manufacturing and maintenance costs. In contrast, three-winding transformers have an additional medium-voltage winding, suitable for multi-voltage output scenarios. For conventional single-stage industrial and municipal power distribution, the two-winding 630kVA oil immersed transformer is more targeted and cost-effective, with more stable operation.
Q2: Does this 6kV/0.4kV 630kVA transformer need regular oil replacement and daily maintenance?
This sealed oil immersed distribution transformer adopts a fully enclosed corrugated tank structure, which isolates the internal transformer oil from the external environment, preventing oil oxidation, moisture absorption and deterioration. Under normal operating conditions, it basically realizes maintenance-free operation, and no regular oil replacement is required. Users only need to regularly check the transformer operating temperature, shell sealing performance and terminal connection tightness every quarter, and clean the surface dust to ensure heat dissipation. It is recommended to conduct a comprehensive performance test every 3 years to guarantee long-term stable operation.
Q3: What installation and environmental conditions are required for this three-phase oil cooled transformer?
This 630kVA 6kV to 0.4kV oil immersed transformer supports indoor and outdoor installation. The installation site needs to be flat, well-ventilated, and avoid long-term direct sunlight, severe dust accumulation and corrosive gas erosion. The ambient operating temperature should be controlled between -20℃ and +40℃, and the altitude should not exceed 1000 meters. Outdoor installation needs to be equipped with rainproof and sunshade facilities, and a safe heat dissipation space should be reserved around the transformer to avoid heat accumulation affecting cooling efficiency and service life.
