Product Description
A dry-type transformer is a type of transformer that does not use liquid cooling agents. Unlike traditional oil-immersed transformers, dry-type transformers use air as the cooling medium, thus eliminating the safety hazards such as oil leakage and explosion. At the same time, dry-type transformers also have the advantages of simple structure and convenient maintenance, making them widely used in various industries. The main components of a dry-type transformer include the main wiring, high and low voltage windings, core, and insulating materials. The main wiring of a dry-type transformer is usually made of high-purity copper or aluminum, capable of withstanding high temperatures and high currents.It is widely used in local lighting, high-rise buildings, airports, docks, CNC mechanical equipment and other places. In simple terms, a dry-type transformer refers to a transformer whose core and windings are not impregnated with insulating oil.
Transformer normal service conditions
1.The height above the sea level is below 1000m;
2.Highest air temperature +40ºC;
3.Highest daily average air temperature+30ºC;
4.Highest annual average air temperature +20ºC;
5.Lowest outdoor air temperature -5ºC.
(defines in detail when transformer in special service conditions )
Type of cooling
The cooling methods are divided into natural air cooling (AN) and forced air cooling (AF). During natural air cooling, the transformer can operate continuously at the rated capacity for a long time. When using forced air cooling, the output capacity of the transformer can be increased by 50%. This method is suitable for intermittent overload operation or emergency accident overload operation; however, due to the significant increase in load loss and impedance voltage during overload, it is in an uneconomical operating state, so it should not be allowed to operate under long-term continuous overload conditions.
Structure type
The core is mainly composed of silicon steel sheets and the coils are epoxy resin cast. Insulating tubes are placed between the high and low voltage coils to enhance electrical insulation, and the coils are supported and constrained by pads. The fasteners for the components that are connected together have anti-loosening properties.
Construction performance:
1. Solid insulation encapsulated windings
2.Unencapsulated windings
The windings: Among the two windings, the one with higher voltage is the high-voltage winding, and the one with lower voltage is the low-voltage winding.
From the relative positions of the high and low voltage windings, high voltage can be divided into concentric type and overlapping type.
Concentric windings are simple and easy to manufacture, and this structure is adopted in all cases.
Advantage
Due to the advantages of dry-type transformers, such as strong anti-short-circuit capability, low maintenance workload, high operating efficiency, small size, and low noise, they are often used in places with high requirements for fire prevention and explosion protection.
1.
Safe, fireproof, pollution-free, and can be directly operated at the load center;
2.
Adopting domestic advanced technology, with high mechanical strength, strong anti-short-circuit capability, small partial discharge, good thermal stability, high reliability, and long service life;
3.
Low loss, low noise, significant energy-saving effect, and maintenance-free;
4.
Good heat dissipation performance, strong overload capacity, and can increase capacity for forced air cooling;
5.
Good moisture-proof performance, suitable for operation in high humidity and other harsh environments;
6. Dry-type transformers can
be equipped with a complete temperature detection and protection system. Using an intelligent signal temperature control system, it can automatically detect and patrol display the working temperature of each phase winding, can automatically start and stop the fan, and has alarm and trip function settings;
7.
Small size, light weight, less floor space occupation, and low installation cost.
Technical Specification
20/0.4kV Dry type transformer Technical parameters(Second level of energy efficiency)
Rated
capacity
(kVA) |
Voltage combination |
Connected
group
label |
No-load
loss (W) |
Load loss (W) |
No-load
current (%) |
Impedance
voltage (%) |
High
voltage
(kV) |
(%) tap
range |
Low
Voltage
(kV) |
| 130°C(B) |
155°C(F) |
180°C(H) |
| 100°C |
120°C |
145°C |
| 50 |
20
22
24 |
±2X2.5
±5 |
0.4 |
Dyn11
YynO |
272 |
1160 |
1230 |
1310 |
2.0 |
6.0 |
| 100 |
432 |
1870 |
1990 |
2130 |
1.8 |
| 160 |
536 |
2330 |
2470 |
2640 |
1.5 |
| 200 |
584 |
2770 |
2940 |
3140 |
1.5 |
| 250 |
672 |
3220 |
3420 |
3660 |
1.3 |
| 315 |
776 |
3850 |
4080 |
4360 |
1.3 |
| 400 |
920 |
4650 |
4840 |
5180 |
1.1 |
| 500 |
1080 |
5460 |
5790 |
6190 |
1.1 |
| 630 |
1220 |
6450 |
6840 |
7320 |
1.0 |
| 800 |
1400 |
7790 |
8260 |
8840 |
1.0 |
| 1000 |
1660 |
9220 |
9780 |
10400 |
0.85 |
| 1250 |
1900 |
10800 |
11500 |
12300 |
0.85 |
| 1600 |
2230 |
13000 |
13800 |
14800 |
0.85 |
| 2000 |
2590 |
15400 |
16300 |
17500 |
0.7 |
| 2500 |
3100 |
18200 |
19300 |
20700 |
0.7 |
| 2000 |
2590 |
16800 |
17800 |
19100 |
0.7 |
8.0 |
| 2500 |
3100 |
20000 |
21200 |
22700 |
0.7 |
Note: 1, To transformers whose rated capacity of 500kVA and below, load loss in the table above the diagonalis suitable for Dyn11 or Yzn11 connection group,the load loss below the diagonal suitable for YynO connection group.
NOTICE !
Kindly provide the essential details outlined below prior to placing your order for a seamless transaction experience:
1. Specify the type of Prefabricated Substation required;
2. Indicate the precise Transformer model and desired capacity;
3. Outline the High and Low Voltage Circuit Main Wiring Scheme for clarity;
4. Detail the Types and Parameters of Electrical Components with any special requirements;
5. Choose a Shell Color to match your aesthetic preference;
6. List the Names, Quantities, and any additional requirements for Spare Parts;
Two-year warranty
More than three certifications
15 years of accumulated experience
Packaging & Shipping
product recommendation
Company Profile
ABOUT OUR COMPANY
Golden Triangle Power Technology Co., Ltd.(stock name: Golden Trianglestock code: 837424) was established in November 2009. lt is a company specializingin the research and development, production, sales, and technical services of powerproducts such as three-dimensional coil core transformers, amorphous alloy coretransformers,amorphous three-dimensional coilcore transformers, photovoltaicsubstations, energy storage equipment, high and low voltage switchgear, European,American, Chinese outdoor box substations,intelligent substations, etc A productionservice oriented enterprise integrating construction EPC. The products are widelyused in fields such as State Grid, Southern Power Grid, railways, mines, infrastructure, metallurgy, roads and bridges, and real estate management system
The company has passed ISO9001:2015 quality management system certification, ISO14001:2015 environmental management system certification, ISO45001:2008 occupational health and safety management system certification, PCCC energy-saving product certification, national mandatory product"CCC"certification, CQC China quality certification, AAA credit rating certification, etc. The company has been rated as a national high-tech enterprise, a provincial "specialized. special and new" small and medium-sized enterprise, one of the top 100 scientific and technological enterprises with the most growth potential in the province, a provincial small and medium-sized scientific and technological enterprise, and a municipal green factory. The company has provincial high-tech enterprise research and development center academician workstation, doctor innovation workstation, 3 invention patents and 51 utility model patents.
The company's products have been recorded in the promotion catalog of the"Energy Saving and People Benefiting Project" and the "Recommended Catalog of Energy Saving Electromechanical Equipment" of the Ministry of Industry and Information Technology, the Ministry of Finance and the National Development and Reform Commission.lt is the first power industry enterprise in Wenzhou to receive direct subsidies from the Ministry of Finance for product sales. The company's products have won honorary titles such as the national industrial energy saving technical equipment products, the first set of products in key fields of provincial equipment manufacturing, and the provincial excellent new industrial products. The production standards of the main products "SCB13-RL solid triangle ironcore dry-type transformer" and "SBH16-RL solid triangle rolled iron core amorphous transformer" are listed as "Zhejiang manufacturing quality standard". The company led the drafting of 10 standards, including "GB/T32825-2016 National Standard for Three phase Dry type Three dimensional Wound Core Distribution Transformer","NB/T 10483-2020 Standard for Three phase Dry type Amorphous Alloy Three dimensional Wound Core Distribution Transformer" and "T/CEElA 251-2016 Standard for Composite Transformers for Photovoltaic Power Generation", making positive contributions to energy conservation and emission reduction in China's powerindustry and the development of green energy technology.
THE HONOR OF COMPANY
Nowadays, market competition is ncreasingly fierce, science and technology changes rapidly. Adhereing to persistent philosophy of "quality is the enterprise life", with the full implementtation of ISO9001:2000 international quality management system, Golden Triangle frimly established "quality execellence .service perfect, product quality, continuous quality improvement" as the quality policy to ensure customer satisfaction. The company was included in "energy saving and Huimin engineering energy-effcient distribution transformer" by the national development and Reform Commission, Ministry of Finance, Ministry of industry and imformation in its first promotion of enterprise.
Company exhibition
Display area
SEVERAL PICTURES ABOUT COMPANY AND PRODUCTION
The company adheres to the quality policy of "quality first, honestservice, strict management, and striving for perfection", and gives back tothe majority of users with first-class technology, first-class quality, and first-class service. We warmly welcome people from all walks of life to visit us forguidance and negotiation, to seek common development, to jointly build a'win-win" and to create a better future with you !
Audited Supplier 
){kind=link}