1. The core adopts high-quality high-permeability silicon steel, with fully skewed joints and a multi-stage stepping process, resulting in a low no-load loss.

2. The surface of the core is treated with a self-leveling nanometer paint process, resulting in low noise levels, and meeting the requirements of residents in residential areas.

3. The low-voltage winding is made of copper foil, with low stress on interlayer insulation. After curing and forming, the bonding is uniform and moisture-resistant.

4. The high-voltage winding adopts a multi-stage multi-layer wire winding or foil structure, combined with Heidrich static mixed pouring and online degassing process, resulting in low partial discharge and excellent electrical performance.

5. High-quality accessories (fans, enclosures) are selected, providing strong overload capacity and high electrical safety.

6. The design of the entire product series adopts an electric field, temperature field, and magnetic field simulation analysis. It has passed KEMA's E2, C2, and F1 tests earlier in China and can operate safely in harsh environments.

7. The product can adopt a dual-mode structure scheme to meet the needs of different customer groups.

8. Unique intelligent transformer solutions, including real-time online big data cloud diagnosis technology, are employed.

SC Transformer Operational Assurance

Enclosure

The protective enclosure can be classified into indoor and outdoor types.

For indoor use, considering heat dissipation and maintenance issues, if there is sufficient installation space, it is generally preferable not to add an enclosure. However, if the user requires it, an enclosure can be provided with multiple observation holes on it, and the enclosure can be coated with the color requested by the user.

The enclosure protection level is usually IP20 or IP23.

IP20 can prevent solid foreign objects larger than 12mm from entering and can resist accidental impacts. IP23, in addition to the functions of IP20, can also avoid droplets of water from entering at angles up to 60° from the vertical line, making it suitable for outdoor installation.

Enclosure materials include powder-coated ordinary steel plates, stainless steel plates, aluminum alloy composite plates, etc.

Temperature Control Device

Transformers are equipped with temperature overheating protection devices, which mainly detect and control the transformer temperature through a PT thermistor embedded in the low-voltage winding. Output digital signals are transmitted through the RS232/485 communication interface. This device has the following functions: ① Circuit display of three-phase winding temperatures during transformer operation. ② Display of the temperature value of the hottest phase winding. ③ Over-temperature alarm and trip. ④ Audible and visual alarms, fan start.

Air Cooling Device

The cooling methods of dry-type transformers are divided into natural air cooling (AN) and forced air cooling (AF). Under normal conditions of use, continuous output of 100% rated capacity is achievable with natural air cooling (AN).

Under forced air cooling (AF), a 50% increase in capacity can be achieved under normal operating conditions. It is suitable for various emergency overload or intermittent overload operations; due to the large increase in load losses and impedance resistance, continuous overload operation with forced air cooling (AF) is generally not recommended.

Terminal Arrangement

Generally, the inlet and outlet methods of transformers are divided into: top inlet and top outlet, bottom inlet, and bottom outlet, and side inlet and side outlet methods.

Conventional outlet methods are still adopted for transformers with a capacity ≤200kVA, and the side outlet is connected to the user's cables.

When the rated capacity is ≥1600kVA, a, b, and c phases adopt double-row outlets, with a spacing of 10 (for 1600,2000kVA) or 12 (for 2500kVA) between the two outlet rows.

As the transformer's side neutral line is located above, for switchgear with the neutral line drawn from the bottom, it is recommended that the transformer's neutral line still enter the switchgear from the top.

SC Series Product Features

Safety

① Fire retardant. The use of epoxy resin materials enables flame retardancy.

② Non-toxic gas. Our company's transformers use resin from the United States Huntsman, which does not contain halogens. During use, it does not release toxic gases, causing no harm to the environment, equipment, or human body.

Reliability

① a. Winding: Coated with anti-mold, anti-bacterial paint (8363). b. Copper busbars: Silver-plated with a thickness of 15μm. c. Iron parts: Coated with epoxy iron red primer and amine-cured baking enamel. d. Clamps: Zinc-plated with a thickness of 15μm.

② Strong seismic resistance. It has strong seismic resistance and can withstand earthquakes up to magnitude eight.

③ Good heat dissipation performance.

Stability

① Moisture resistance. Vacuum impregnation sealing and end sealing processes ensure that the transformer can operate safely and reliably in extremely humid environments (humidity above 96%).

② Impact resistance. Using special segmented cylindrical winding improves voltage distribution, and the starting voltage of partial discharge can reach 8kV/mm; the breakdown voltage can reach 190kV/mm.

Installation and Use of Transformers

1. The installation location should avoid being submerged in water, with an altitude not exceeding 1000m and an ambient temperature exceeding 40°C. Relative humidity should be 100%, and the environment should range from 40°C to -25°C (with the requirement of having load switches and temperature controllers at -25°C).

2. The installation site should be clean, free from conductive dust, and non-corrosive gases, with adequate natural or artificial ventilation conditions.

3. When installing the product, it should generally be positioned 300mm away from walls and other obstacles, and there should be a distance of 300mm between adjacent transformers. These distances can be adjusted appropriately for locations with limited installation space, such as distribution boxes and other constrained areas.

1. Qinshan Nuclear Power Plant Project

CEEG Transformer successfully won the bid for the Qinshan Nuclear Power Project. It provided high-performance SCB epoxy cast dry-type transformers in the first phase, operating well.

2. Tibet Zanda Energy Storage

The Zanda 20MW Photovoltaic Energy Storage Project in Tibet selected CEEG SC(B)-2300/36.5kV epoxy cast dry-type transformers.

3. Shandong CNNC Tancheng Energy Storage Power Station

The Shandong CNNC Tancheng Energy Storage Power Station project utilizes CEEG SC(B)-3750/37kV epoxy cast dry-type transformers.

4. Ningxia Muhe Energy Storage Project

The Ningxia Muhe Energy Storage Project in Ningxia adopts CEEG SC(B)-2300/36.5kV epoxy cast dry-type transformers.

5. NECC（Shanghai）

The main venue of the China International Import Expo, the NECC（Shanghai）, adopts over 200 units of CEEG SCB10 series dry-type transformers.

6. Thailand Project

BYD's automotive production base in Thailand is the company's first overseas venture in passenger vehicles, located in the WHA Industrial Park in Rayong with an annual capacity of 150,000 cars. During construction, 35 SCB14 energy-saving dry-type transformers were provided by CEEG.

7. Romania Project

Romanian paper mill purchased CEEG SCB series 2000kVA dry-type transformers.

8. Iraqi Project

Iraqi cement plant purchased CEEG SCB series 2500kVA dry-type transformers.