330kV oil immersed power transformer is a self-developed product for the transformation of urban and rural power grids in China on the basis of absorbing advanced technologies at home and abroad. Its performance index is superior to GB/T6451《 Technical parameters and requirements of three-phase oil immersed power transformer》, fully in line with manufacturing standards of JB/Y3837-1996 《Method for model preparation of transformer products》 and GB1094.1.2-1996 and GB1094.3-2003 《Power transformer》and GB1094.5-2008 《Power transformer》 and standard UEC-60076 recommended by International Electrotechnical Commission. This product has the outstanding characteristics of low loss, low noise and no pendant core. It has special innovation in safety, reliability, economy, etc.
| Rated Capacity （kVA） |
Tapping Range of high voltage(%) |
L.V. winding (kV) |
Vector Group |
No-Load Loss(W） |
Load Loss (W) |
No-load current (%) |
Short-circuit impedance(%) |
|---|---|---|---|---|---|---|---|
| 90000 | 345 34±2X2.5% 363 36±2X2.5% |
10.5 13.8 15.75 18 20 |
YNd11 | 68.0 | 274 | 0.44 | 14～15 |
| 12000 | 85.0 | 340 | 0.44 | ||||
| 150000 | 101 | 402 | 0.41 | ||||
| 180000 | 116 | 461 | 0.38 | ||||
| 240000 | 145 | 572 | 0.34 | ||||
| 360000 | 198 | 802 | 0.34 | ||||
| 370000 | 202 | 818 | 0.30 | ||||
| 400000 | 214 | 867 | 0.30 | ||||
| 720000 | 332 | 1347 | 0.20 | ||||
| Note: if you have any other special requirements, Please call :86-17560051253 | |||||||
Low loss and noise: the core plate adopts the laminating form of high-performance silicon steel sheet and five layer step full oblique joint, which can provide low no-load loss and noise. The oil tank adopts the technology of magnetic shielding and copper shielding. According to the different positions of the leakage magnetic field, measures are taken to reduce the eddy current loss, which reduces the load loss and fundamentally solves the local overheating of the transformer.
Safe operation: the partial discharge capacity of the product is kept below 100pC. In order to prolong the service life of the transformer and improve its short circuit resistance, the cooling structure is designed reasonably. When the transformer is short circuited, the mechanical stress of the winding conductor is low, and there are other short-circuit withstand measures and strict production process as guarantee.
Reliable operation: at present, oil immersed power transformer usually controls on load operation by limiting the average temperature rise of winding to realize the thermal life of transformer. In the development process, the control of hot spot temperature is more important than that of average temperature for large capacity UHV Transformer. For transformers with natural oil circulation, the average temperature rise of oil may meet the requirements, while the temperature rise of hot spot may exceed its limit. Therefore, it is necessary to calculate and strictly control the hot spot temperature rise of large capacity transformer.
Easy installation and maintenance: in order to reduce the workload field installation, all accessories are pre installed before leaving the factory. The secondary cable is laid on the main body of the transformer before leaving the factory and led to the terminal box and control box. Most large capacity transformers adopt natural oil circulation and air cooling, and maintain 70% cooling capacity when the fan stopped.
1. The maximum ambient air temperature shall not exceed 40℃, and the minimum shall not below - 25℃;
2. The altitude shall not exceed 1000m. If special customized transformers and low-voltage components are used, the altitude can reach 4000m;
3. The vertical inclination is no more than 5°, and no violent vibration and impact;
4. The air humidity is not more than 90% (+ 25℃);
5. No gas and conductive dust that will seriously affect the insulation of transformer, no explosion hazard and no corrosion of electrical components;
6. Outdoor wind speed shall not exceed 35m /s.
7. If service conditions beyond the above, specially customized product is available.
The customer needs provide main parameters of the transformer: capacity, input and output voltage, wiring group, etc.
Other customer requirements
As an enterprise specializing in transformer production for 20 years, we have high quality, fast delivery, guarantee after-sales service and factory price. What's more, we have ISO9001-2008, OHSAS 18001:2007, ISO4001:2004L certificates and IEC, ANSI, KEMA, GOST standard.
Yes, each product comes with two year(Up to 5 years)warranty to ensure the correct use of the product by the customer.
11kV-220kV Oil-immersed Power Transformer, Dry-type Transformer, Unpacked H Grade Dry Transformer, Oil-immersed Distribution Transformer, Pad-mounted Transformer.
Yes! Our products can be customized. We have design and engineering teams, and we can customize products according to customers' drawings or requirements.
1 set.
It depends on the quantity of your order. It usually takes 20-45 days.
We always adhere to technology as our guiding principle, upholding the spirit of "dedication, professionalism, and focus," to provide meticulously crafted tools and serve millions of users worldwide.
We have established a professional R&D team to continuously optimize our products, save energy, and adopt new manufacturing processes to tailor high-performance, cost-effective equipment for our customers.
We have more than 20 years to produce different kinds of transformers.
The factory's 6S management system improves efficiency, ensures quality, and safeguards the quality of the products the company outputs.
As a high-tech enterprise integrating R&D, production and sales, we ensure product quality while maximizing cost advantages for our customers.
We have a strong supply chain and after-sale service.
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