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.
Our Advantages
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.
Product Parameters
SCB18-(30-2500)/10 3-phase Dry-Type Distribution Transformer
Rated
capacity(kVA) |
High voltage(kV) |
Tap range |
Low voltage(kV) |
connected group label |
No-load
loss(w) |
Load loss
(130ºC)(W) |
No-load current(%) |
| 30 |
6
6.3
6.6
10
10.5
11
|
±2*2.5
±5
|
0.4
|
Dyn11
|
170 |
670 |
4.0 |
| 50 |
240 |
940 |
| 80 |
330 |
1290 |
| 100 |
360 |
1480 |
| 125 |
420 |
1740 |
| 160 |
480 |
2000 |
| 200 |
550 |
2370 |
| 250 |
640 |
2590 |
| 315 |
790 |
3270 |
| 400 |
880 |
3750 |
| 500 |
1040 |
4590 |
| 630 |
1200 |
5530 |
| 630 |
1170 |
5610 |
6.0
|
| 800 |
1360 |
6550 |
| 1000 |
1590 |
7650 |
| 1250 |
1880 |
9100 |
| 1600 |
2200 |
11000 |
| 2000 |
2740 |
13600 |
| 2500 |
3240 |
16100 |
IMPORTANT NOTICE!
Before placing your order, kindly provide us with the following essential information:
1. The specific type of prefabricated substation;
2. Model and capacity specifications of the transformer;
3. Detailed high and low voltage circuit main wiring scheme;
4. Specific types and parameters of any electrical components with special requirements;
5. Preferred shell color;
6. Detailed names, quantities, and other specific requirements for spare parts and accessories;
Two-year warranty
More than three certifications
15 years of accumulated experience
Packaging & Shipping
Product Recommendation
ABOUT OUR COMPANY
Golden Triangle Electric Power Technology Co., Ltd. (stock name: Golden Triangle, stock code: 837424) was established in November 2009. We specialize in the research, development, production, sales, and technical services of power products. Our extensive product range includes three-dimensional coil core transformers, amorphous alloy core transformers, amorphous three-dimensional coil core transformers, photovoltaic substations, energy storage equipment, high and low voltage switchgear, outdoor box substations for various regions, and intelligent substations. We are a service-oriented enterprise integrating construction EPC. Our products are widely utilized in sectors such as State Grid, Southern Power Grid, railways, mines, infrastructure, metallurgy, roads, bridges, and real estate management.
Our company boasts numerous certifications, including ISO9001:2015 for quality management, ISO14001:2015 for environmental management, and ISO45001:2008 for occupational health and safety. We also hold PCCC energy-saving product certification, national mandatory product 'CCC' certification, CQC China quality certification, and an AAA credit rating. Recognized as a national high-tech enterprise, a provincial 'specialized, special and new' SME, and one of the top 100 scientific and technological enterprises with growth potential in the province, we are also a provincial small and medium-sized scientific and technological enterprise and a municipal green factory. Our research and development center houses both academician and doctor innovation workstations. Additionally, we hold 3 invention patents and 51 utility model patents.
Our products are listed in the promotion catalog of the 'Energy Saving and People Benefiting Project' and the 'Recommended Catalog of Energy Saving Electromechanical Equipment' by the Ministry of Industry and Information Technology, the Ministry of Finance, and the National Development and Reform Commission. We are proud to be the first power industry enterprise in Wenzhou to receive direct subsidies from the Ministry of Finance for product sales. Our products have earned numerous accolades, including national industrial energy-saving technical equipment products, the first set of products in key fields of provincial equipment manufacturing, and provincial excellent new industrial products. The production standards for our main products, 'SCB13-RL solid triangle iron core dry-type transformer' and 'SBH16-RL solid triangle rolled iron core amorphous transformer', are recognized as 'Zhejiang manufacturing quality standards'. We have also 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', significantly contributing to energy conservation and emission reduction in China's power industry and the advancement of green energy technology.
THE HONOR OF COMPANY
In today's fiercely competitive market, where science and technology evolve rapidly, we maintain our steadfast philosophy that 'quality is the enterprise's life'. By fully implementing the ISO9001:2000 international quality management system, Golden Triangle firmly upholds the quality policy of 'quality excellence, service perfection, continuous quality improvement' to ensure customer satisfaction. Our company has been included in the 'Energy Saving and Huimin Engineering Energy-efficient Distribution Transformer' initiative by the National Development and Reform Commission, Ministry of Finance, and Ministry of Industry and Information.
The exhibition we attended
SEVERAL PICTURES ABOUT COMPANY AND PRODUCTION
FAQ
- Q: Are you manufacturer?
A: Yes, we are manufacturer. Our factory is in Wenzhou China
- Q: Can I get guarantee of products?
A: Yes, every product is 1 year quality warrantee under customer correct using the products.
- Q: Do you have any Certificate?
A: Yes. Each of our unit has CCC, ISO9001 certificate. All the electric parts with CE certificate, If you need any other Certificate, we can help you to get it.
- Q: How to buy it? What about the delivery?
A: Please contact me by email or online, let me know your situation, I will give you professional solution. We have shipping agent can choosing the cheapest and fastest delivery. FOB, CIF, C&F or EXW are no problem for us.
- Q: What's the payment terms?
A: For small testing orders, we can accept Waster union, T/T and Credit card.
For mass orders, we accept t/t and L/C.
- Q: What about the production?
A: Produce time is 4~6weeks.
- Q: Could you offer some spare parts?
A: Yes, no problem.
- Q: What about the maintenance?
A: All the goods past the test, maintenance is very easy.
Adhering to the quality policy of 'quality first, honest service, strict management, and striving for perfection', we are committed to repaying our users with first-class technology, unparalleled quality, and exceptional service. We warmly welcome individuals from all walks of life to visit us for guidance, negotiation, and to pursue common development. Let us collaboratively build a win-win future and create a better tomorrow together!
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