High Voltage 10kv/0.4kv 500kVA Transformer with Low Voltage Options
| 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.
| Our Advantage |
The main advantages of dry-type transformers are fire prevention, explosion prevention, maintenance-free, environmental friendliness, and flexible installation. They are particularly suitable for indoor, densely populated, and safety-demanding scenarios with high fire and explosion prevention requirements.
1. Core advantages (sorted by importance)
1. Ultra-safe (the most core advantage)
Oil-free design: No flammable insulating oil is used, which eliminates the risks of oil leakage, combustion, and explosion at the source.
Flame-retardant self-extinguishing: The epoxy resin casted windings have self-extinguishing properties, and they do not contribute to combustion or produce toxic gases during short-circuit faults.
Applicable scenarios: High-rise buildings, subways, hospitals, airports, data centers, chemical plants, mines, etc., where fire and explosion prevention requirements are extremely high.
2. Environmentally friendly and pollution-free
No risk of oil leakage polluting soil and water sources, and the disposal after use is simple and environmentally friendly.
No oil mist or odor during operation, suitable for clean environments such as food and medicine.
3. Extremely low maintenance cost (almost maintenance-free)
No need for regular oil quality testing, oil filtration, oil replacement, or handling of leaks.
Daily maintenance only requires cleaning dust and checking connections, with annual maintenance costs being 1/3 to 1/2 of oil-immersed type.
No oil reservoirs, breathing apparatuses, gas relays, etc., with few fault points.
4. Flexible installation and space-saving
Small size, light weight: At the same capacity, the volume is about 40% smaller than oil-immersed type, and the weight is over 30% lighter.
Can be installed close to the load center: Directly placed in the distribution room or floor shaft, shortening low-voltage cables and reducing line losses.
No special foundation or orientation requirements: No need for oil-immersed chambers or fire barriers, with high flexibility in layout.
5. Strong environmental adaptability
Resistant to moisture, dust, and pollution: The cast structure can operate stably in high humidity (99% RH), dusty, salt fog, coastal, and mining environments.
High temperature rating: Commonly F class (155°C) and H class (180°C), with strong short-circuit overload capacity.
Good short-circuit resistance: The overall cast structure has high mechanical strength and can withstand sudden short-circuit impacts.
6. Reliable operation and long lifespan
No oil quality deterioration, slow insulation aging, and the design lifespan can reach 25-30 years.
Intelligent temperature control (PT100) monitors the winding temperature in real time, automatically cooling or alarming in case of over-temperature, avoiding aging due to overheating.
7. Low noise and high efficiency
Noise is approximately 45-55 dB when cooled naturally, lower than oil-immersed type (60-70 dB).
Low loss, high efficiency, and more energy-saving in long-term operation.
| Product specification |
| 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 |
NOTICE!
Important: Please provide the following information before placing your order:
1. Type of prefabricated substation;
2. Transformer model and capacity requirements;
3. Main wiring scheme for high and low voltage circuits;
4. Specifications and parameters for any special electrical components needed;
5. Desired shell color;
6. Names, quantities, and any other requirements for spare parts and accessories;
Two-year warranty
More than three certifications
15 years of accumulated experience
structure
featured products
Factory pictures
This product is a dry-type transformer with oil-cooled load tap changer 
Display area and dispatch area. 
The exhibition we attended
Company profile
ABOUT OUR COMPANY
Golden Triangle Power Technology Co., Ltd. (stock name: Golden Triangle, stock code: 837424) was established in November 2009. Our company is a prestigious leader in the field of power products, excelling in research, development, production, sales, and technical services. Our extensive product line 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, as well as European, American, Chinese outdoor box substations, and intelligent substations. As a production-service-oriented enterprise with expertise in EPC construction, our cutting-edge products serve a variety of sectors including the State Grid, Southern Power Grid, railways, mines, infrastructure, metallurgy, roads and bridges, and property management.
Golden Triangle has proudly earned numerous certifications including 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, and the AAA credit rating. We are recognized as a national high-tech enterprise, a provincial "specialized, special and new" small and medium-sized enterprise, and among the top 100 most promising scientific and technological enterprises in the province. Additionally, we are honored as a municipal green factory. Our company is equipped with a provincial high-tech enterprise research and development center, an academician workstation, a doctor innovation workstation, 3 invention patents, and 51 utility model patents.
Our products have been showcased in 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. Golden Triangle is the first enterprise in Wenzhou's power industry to receive direct subsidies from the Ministry of Finance for product sales. We have been honored with multiple accolades, including titles for national industrial energy-saving technical equipment products and the first set of products in key fields of provincial equipment manufacturing. Our flagship products like the "SCB13-RL solid triangle iron core dry-type transformer" and the "SBH16-RL solid triangle rolled iron core amorphous transformer" adhere to "Zhejiang manufacturing quality standards." Our company has led the drafting of 10 standards, playing a pivotal role in energy conservation, emission reduction in China's power industry, and the promotion of green energy technology.
Customer visits the factory
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.
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 !