Main Functions And Features
1. The low-voltage winding is made of full-section copper foil and by special low-voltage winding machine with f-grade insulation.
2. The winding end is sealed and casted with resin, and then shaped by curing to prevent moisture and fouling.
3. Temperature control device: the transformer is equipped with BWDK series signal thermometer, which is embedded in the upper part of the low-voltage coil. The temperature-measuring components can automatically detect and display the working temperature of the corresponding phase coil, and alarm and trip at over temperature .
4. Insulation grade: the insulation grade of transformer can be divided into grades.
Transformer Structure
| Rated Capacity(kVA) | H.V. Winding (kV) | Tapping range of high voltag (%) | L.V. winding (kV) | Vector Group | No-Load Loss(W) | Load Loss (W) | No-load current (%) | Short-circuit impedance (%) |
| 31500 | 220 242 | ±2×2.5% | 6.3 6.6 10.5 | YNd11 | 28 | 128 | 0.56 | 12~14 |
| 40000 | 32 | 149 | 0.56 | |||||
| 50000 | 39 | 179 | 0.52 | |||||
| 63000 | 46 | 209 | 0.52 | |||||
| 75000 | 10.5 13.8 | 53 | 237 | 0.48 | ||||
| 90000 | 61 | 273 | 0.44 | |||||
| 120000 | 75 | 338 | 0.44 | |||||
| 150000 | 10.5 13.8 15.75 18 21 | 89 | 400 | 0.40 | ||||
| 160000 | 93 | 420 | 0.39 | |||||
| 180000 | 102 | 459 | 0.369 | |||||
| 240000 | 128 | 538 | 0.33 | |||||
| 300000 | 15.75 18 21 | 151 | 641 | 0.3 | ||||
| 360000 | 173 | 735 | 0.3 | |||||
| 370000 | 176 | 750 | 0.3 |
Our Workshop
Company Introduction 
1.Qingdao Hengfengyou Electrical Engineering Co., Ltd. (hereinafter referred to as Hengfengyou) is a large-scale enterprise group with electricity transmission and distribution as its main business,which integrates scientific research, development, manufacturing and trade. After 30 years rapid economy development in China, Hengfengyou now is a leading R & D, manufacturing and service base for MV , HV and ultra-HV power distribution equipment in China. At present,we have 50 senior technicians and more than 300 employees, with a complete sales and service system. Our products sell well at home and abroad, and our annual output value adds up to $100 million. .
2.At present, Hengfengyou has 6 wholly-owned and holding subsidiaries, which are respectively engaged in R & D, manufacturing and service of transformers, switchgear, package/unit substation, pole-mounted high-voltage vacuum circuit breakers, new energy, and electrical engineering.
For a long time, the company has maintained close technical exchanges and cooperation with domestic and foreign universities, scientific research institutes and electric power enterprises.
Hengfengyou independently designed and developed SCB series dry-type transformer and SC series oil immersed transformer. Our product performs with high operation efficiency, and obvious energy conservation. The overall performance index reaches the world's advanced level.
HFY Certificate 
Our Services
We have established strict working procedures and standards in the development, production, sales and after-sales of electrical products, so as to provide customers with first-class products and the best service.
1. Our electrical engineer has more than 10 years of working experience
2.Our workshop workers are all skilled industrial workers who have received three months 'pre-job training
3. Our sales team has been extensively trained by management consultants to provide professional solutions for customers
4. Our technical team can provide customers with 24-hour technical support world wide
5. Our customer service team ensures that orders are delivered on time.
Pre-sale service:
1.ISO certified excellent Manufacturer
2. Third-party authoritative certifications: SGS, CE, CB, CNAS, CQC, CCC, etc
3. Flexible payment: T/T, LC, O/A
4. Sufficient inventory, fast delivery time and long validity of the price
5. The whole process of picture tracking can be realized in production and transportation
6. Experienced professional sales team and a strong technical team
7. Sincerely invite customers to visit the company for guidance
After-sales service:
1. If there is any quality problem after receiving the goods, you can return the goods free of charge or ship new products
2. We provide our customers with a 2-year product warranty
3. Provide 24-hour, 365-day technical guidance worldwide
4. The VIP customers enjoy our promotional activity
The Finished Project
Team Show
FAQ
Q1: Is OEM/ODM available?
A1: Yes, it is! Our products can be Customized. We have design and engineer teams,we can customize products according to customers' drawing or requirements.
Q2: What's your MOQ?
A2: One Set.
Q3: How is the delivery time?
A3: It depends your order quantity and it normally takes about 15-20 days.
Q4: How do you control the quality?
A4: We have QC team comply with TQM to ensure the quality. Each step is in compliance to the standards. At the same time, we will take photos and shoot video for you if you need.Every product will be fully assembled and carefully tested before packing and shipping.
Q5: How long is the warranty?
A5: Within one year from the sale date, if there are any accessory problems, you just provide the photos of damaged accessory, then we will provide free accessory. According to the number of products, we will provide easily damaged accessories for free. We also can provide technical support if you need.