Hengfengyou Electric successfully delivered 206 single-phase transformers on poles to American Samoa customers
Writer： Hengfeng you electric Time：2024-12-25 views：times
Recently, Qingdao Hengfengyou Electrical Engineering Co., Ltd. (hereinafter referred to as "Hengfengyou Electrical") successfully completed the delivery task to American Samoa customers, delivering a total of 206 single-phase transformers on the pole. The smooth implementation of this project not only demonstrates Hengfengyou Electric's outstanding strength in the field of power equipment manufacturing, but also further consolidates the company's position in the international market.
I、 Background of the American Samoa Transformer Project
American Samoa is a US territory located in the South Pacific, and due to its unique geographical location and maritime climate conditions, it has extremely strict requirements for electrical equipment (corrosion resistance). In order to meet the electricity needs of local residents and enterprises, improve the stability and reliability of the power system, the local government has decided to upgrade the power grid and purchase a batch of high-quality single-phase transformers on the poles.
II、 American Samoa Transformer Design Standards:
The design, construction, and testing of transformers in American Samoa shall comply with the latest published recognized ANSI, IEEE, and NEMA standards, such as ANSI C57.12.00, C57.12.22, C57.12.70, C57.12.90, NEMA TR-1, TR-P9-1977, and REA U-5.
III、 Customer demand in American Samoa:
The primary distribution feeder of ASPA adopts a 13.2 kV/7.62 kV multi grounding system. For 240/480 V three-phase loads, the transformer will be connected as single-phase or three-phase.
When measured by resistance method at rated voltage and kilovolt ampere, the temperature rise of the transformer winding should not exceed 65 ℃. According to the latest version of ANSI C57.12.90
3. The temperature rise of hot spots shall not exceed 80 ℃. The bottom of the lid and related hardware and brackets should be made of 304L or 304 low-carbon (0.05%) stainless steel.
The paint used for transformer boxes and covers should be # 70 gray. If there are special anti-corrosion coatings or painting methods, please explain their advantages and indicate the price appendix (if any).
5. The casing should be # 70 gray. High voltage gaskets with corona protection should be provided to prevent marks on the transformer cover. (Each transformer should have two main bushings)
6. If the manufacturer has other functions that can extend the service life of its transformer in corrosive coastal environments, the manufacturer should provide explanations for these functions.
7. The transformer should have an MCOV lightning arrester installed on the storage tank, with an insulated bird proof cover and insulated jumper wires to the bushing. The rated values of lightning arresters should be MCOV of 10 kV rms and 8.4 kV rms..
8. Transformer oil should comply with the regulations of the US Environmental Protection Agency (EPA) regarding non polychlorinated biphenyls oil. Each transformer should be clearly marked with the "NO PCB" symbol.
9. Procurement List
Pole type single-phase transformer high voltage: 7.23kv 120/240 10KVA -16 units
Pole type single-phase transformer high voltage: 7.23kv 120/240 100KVA -50 units
Pole type single-phase transformer high voltage: 7.23kv 120/240 25KVA -54 units
Pole type single-phase transformer high voltage: 7.23kv 120/240 37KVA -36 units
Pole type single-phase transformer high voltage: 7.23kv 120/240 75KVA -50 units
IV、 Customized production of transformers in American Samoa:
Based on customer needs, Hengfengyou Electric has launched a customized production process. The company has carefully designed and manufactured this batch of column mounted single-phase transformers in strict accordance with international standards and customer requirements. All products undergo strict FAT testing and quality inspection to ensure that each transformer can operate stably in harsh environments.
V、 Logistics and transportation support for transformers in American Samoa:
In order to ensure that the equipment arrives at its destination on time and safely, Hengfengyou Electric has arranged a professional logistics team to be responsible for transportation work. After several days of sea voyage from Qingdao Port, 206 single-phase transformers were successfully transported to American Samoa. Throughout the transportation process, Hengfengyou Electric closely monitored the status of the goods and promptly coordinated to resolve any potential issues.
VI、 On site installation and commissioning of transformers in American Samoa:
After the equipment arrived, Hengfengyou Electric dispatched technical engineers to American Samoa for on-site guidance, installation, and commissioning. The engineers overcame language barriers and environmental differences, efficiently completed the installation work, and trained local technicians to ensure they could independently operate and maintain these devices.
At present, all 206 single-phase transformers delivered this time have been put into operation, significantly improving the power supply capacity and stability of the American Samoa power grid. The American Samoa client highly praised the work of Hengfengyou Electric and considered it a very successful cooperation case. Through the successful implementation of this project, Hengfengyou Electric has not only won the trust and praise of customers, but also accumulated valuable experience for the company to expand into overseas markets.
