Flyback Transformer (High-overload Oil-immersed Transformer)
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- Model NO.: High-overload Oil-immersed Transformer
- Phase: Three
- Cooling Method: Oil-immersed Type Transformer
- Certification: ISO9001-2000, ISO9001, CCC
- Frequency Characteristics: 50-60Hz
- Brand: Keyuan
- Rated Capacity: 30kVA-1600kVA
- Product Name: Flyback Transformer(High-Overload Oil-Immersed Tra
- Tap Range: ±5 or ±2X2.5%
- Vector Group: Dyn11 or Yyn0
- Primary Voltage: 6kv/ 6.3kv/ 10kv/ 10.5kv/ 11kv/ 13.2 Kv
- Transport Package: Wooden Case
- Origin: China
- Application: Power, Electronic
- Core: Amorphous Alloy Transformer
- Winding Type: Two-winding Transformer
- Usage: Power Transformer
- Shape of Core: Ring
- Secondary Voltage: 0.4kv/10kv
- Color: Gray
- Product Model: High-Overload Oil-Immersed Transformer
- Type: Oil Immersed
- Frequency: 50Hz ,60Hz
- Trademark: KEYUAN
- Specification: 30KVA-2500KVA
- HS Code: 8504
High-overload Oil-immersed Transformer
1. Brief Description
The seasonal variation, personal mobility, and the difference of power consumption of residents at different time periods of day and night lead to big load fluctuation of power distribution network of China, the capacity of distribution transformer doesn't match the power demands, the specific transformers of general enterprises run at no load or at light load in over 70% of the time, and the common transformers of residents run at no load or at light load in over 80% of the time, resulting in high loss of transformer. To address such situation, the Company develops the high-overload oil-immersed transformer. The insulating material of this new transformer reaches the standard of insulation class B and higher. On the basis of normal temperature rise requirements, this new transformer satisfies staged continuous operation for 6h at 1.5 multiples of rated capacity (3h respectively at load rising and dropping stages), 3h at 1.75 multiples of rated capacity (1.5h respectively at load rising and dropping stages), and 1h at 2.0 multiples of rated capacity, without affecting the normal service life of transformer. The temperature rise of high-overload distribution transformer satisfies class-F insulation limit value, and the current applying process curve of temperature rise test is shown by Fig. 1. Meanwhile, according to the core material, this new transformer can be classified into the high-overload oil-immersed transformer with amorphous alloy core and the high-overload oil-immersed transformer with the core made of silicon steel sheet.
2. Application Scope
The product has been widely applied in new and reconstruction projects of urban and rural power grids, and is especially suitable for the areas where the seasonable fluctuation of power consumption is big, the difference of power consumption at day and night is big and the daily maintenance is difficult. As the transformer adopts fully sealed structure and avoids contact with the air, it may run in the humid environment and is the ideal power distribution equipment for urban and rural power distribution network.
3. Model Description
: GB1094.1, GB1094.2, GB1094.3, GB1094.5,
IEC 60076-1:2000, IEC 60076-2:1993, IEC 60076-3:2000, IEC 60076-5:2006,
GB1094.1, GB1094.2, GB1094.3, GB1094.5,
IEC 60076-1:2000, IEC 60076-2:1993, IEC 60076-3:2000, IEC 60076-5:2006,
GB/T 6451, etc
5. Normal Service Conditions
Height above sea level: Not greater than 1,000m;
Ambient temperature: Maximum temperature: +40ºC;
Maximum daily average temperature: +30ºC;
Maximum annual average temperature: +20ºC;
Minimum outdoor temperature: -25ºC;
Installation environment: ground acceleration caused by earthquake: ag<2m/s
1. The product may overload at double the rated capacity for 1h, at 1.75 multiples of rated capacity for 3h and 1.5 multiples of rated capacity for 6h while ensuring normal service life of the transformer.
2. The low voltage adopts foil winding, thus enhancing the ability of the transformer to withstand the sudden short circuit; as the low voltage adopts copper foil winding, the electric field distribution of transformer is uniform. The low-voltage inner frame adopts formed hard paper tube, while the high-voltage outer half lap is wound with tasteless glass adhesive tape layer by layer. The compression pad adopts the laminated wood, thus enhancing the mechanical strength of the transformer. The transformer uses vacuum oil filling, which may totally eliminate the bubble in the coil, so as to improve the overall ability of the transformer to withstand the sudden short circuit.
3. The tank rim adopts stainless steel bolts, with beautiful appearance.
4. The oil tank adopts the fully sealed tank, thus isolating the transformer oil from the air, and slowing down the aging of transformer oil. The sealing elements adopt formed parts, with the sealing reliability of the transformer enhanced.
Guangdong Keyuan Electric Co., LTD is a professional electrical manufacturer engaged in power transformer up to 35kv and other electrical equipment. For instance, amorphous alloy power transformer, dry-type transformer, oil-immersed transformer, with type, combined transformer substation, high and low voltage complete switchgear, rectifier transformer, electric furnace transformer, mining and other special purpose transformer. After nearly 10 years of development, Keyuan Electric has now become one of the major suppliers of Chinese state grid and southern power grid.
Keyuan electric is located in Nanhai district, Foshan city of Pearl River delta. As the forefront of reform and opening up, Foshan provides us convenient traffic conditions. Our Industrial park covers an area of 40000 square meters, and the annual design production capacity is almost 300 million dollars. The modern garden-like factory has several functions, for example production, technology development, staff living, learning and entertainment. Hereinto, production plant owns 2 spacious and bright body building, 11 workshops, and more than 260 sets of advanced production and testing instruments, which guarantee the high quality of our production; Perfect function design of the complex and the r&d center adopt ERP management system which provide an advanced platform for e-commerce, operations management, and the product innovation; At the same time,our quiet and graceful staff living area provides employees with a comfortable living environment which owns dine, entertainment, information, learning, and other
functions Currently, Keyuan electric has more than 30 senior engineering and technical talents, including 5 senior engineers. The strong technical force provide us with effective guarantee about product research and development. The company has got the certification of ISO9001:2008 quality management system, ISO14001 environmental management system and OHSAS18001 occupational health and safety management system. The amorphous alloy power transformer, dry type transformer, amorphous alloy class H dry type transformer, oil-immersed transformer, pre-installed type transformer, combined transformer, high and lowvoltage complete switchgear of our own successively won the "Guangdong famous brand", "Guangdong famous quality products", "China AAA + grade credit enterprise", "qualified supplier" and "excellent supplier" of the state grid and southern grid power electric equipment, "eagle enterprises " which was known as providing special support and training up to become listed companies. In 2009, Keyuan Electric was named as national hi-tech enterprise
Keyuan Electric always adheres to keep synchronized between management innovation and technology innovation, import modern management mode. At the same time of continuously expanding the sales network to the nationwide, our company is constantly trying to improve the internal management quality, optimize the management system.
"Science and technology, energy saving, green, safe, efficient" is always the core principle of our keyuan employees. We will always stick to it and become our customers' loyal service provider and guider of the electric industry.
If you are interested in our products, feel free to contact me!
Mobile: +86 13106709321
Guangdong Keyuan Electric Co., Ltd.