Oil-Immersed Transformer-High Voltage 66KV

Product Application​

Its voltage level is well-suited for the transmission and distribution links in medium-voltage power grids. It is widely applied in various fields such as industrial power supply, urban and rural power distribution, and infrastructure projects. For example, it provides stable power support for large industrial parks, mining areas including metal mines and non-metallic mines, as well as key transportation facilities like highways and ports. Designed with excellent energy conversion efficiency and safety performance, it ensures a stable and reliable power supply to meet diverse operational needs.​

Product Advantages​

Enhanced Short-Circuit Tolerance​

The 66kV transformer has obtained national-level certification. It is specially designed to withstand and alleviate the impact of short circuits, effectively protecting the safety and stability of the electrical system.​

Parameters table

Oil-immersed Transformer-High Voltage 66KV
Type	Rated capacity (kVA)	voltage combinations(kV)	Cennection Symbol	Impedance                                                                                     (%)	Gross Weight (t)	Reference Dimensions(mm) L*W*H	No-Load Loss  (W)	Load Loss    (W)
S(F)11-6300/66	6300	H.V. 35~38.5  ±2×2.5%  L.V.   3.15,3.3,6.3,  6.6,10.5	YNd11	9~11	22	5600*3800*4000	8	34.2
S(F)11-8000/66	8000				24	5700*4000*4200	9.6	40.5
S(F)11-10000/66	10000				27	5800*4200*4400	11.3	47.8
S(F)11-12500/66	12500				30	5900*4300*4500	13.4	56.8
S(F)11-16000/66	16000				33	6000*4400*4600	16.1	69.8
S(F)11-20000/66	20000				36	6100*4500*4800	19.2	84.6
S(F)11-25000/66	25000				43	6500*4500*5000	22.7	100
S(F)11-31500/66	31500				49	6600*4600*5200	26.9	120
S(F)11-40000/66	40000				59	6800*4800*5300	32.2	141
S(F)11-50000/66	50000			10~12	69	7000*5000*5500	38	167
S(F)11-63000/66	63000				75	7400*5300*5700	44.9	198

Low Energy Loss Design​

By adopting advanced design concepts and high-quality materials, this transformer reduces power loss to a great extent, improving energy efficiency and lowering operational costs. The no-load loss is 10%-15% lower than the current national standard GB 6451-2008, and the load loss is 3%-5% lower than the same national standard.​

Quiet Operational Performance​

Its optimized structural design and high-performance components reduce operational noise, contributing to a quieter environment in the surrounding areas.​

Dependable Long-Term Operation​

Through strict testing procedures and stringent quality control, the transformer maintains stable performance, making it ideal for applications that require 24/7 continuous operation.​

Product Features​

Core Material and Structure​

The transformer core is made of high-grade silicon steel sheets, stacked in a multi-stage ladder form. It boasts low loss, low noise, and strong short-circuit resistance.​

Wide Application and Recognition​

Widely used in regional substations and distribution networks, the product has received consistent praise from users. Our 66kV oil-immersed distribution transformer has passed relevant national certifications and appraisals.​

Tank Design​

Adopts a sealed oil tank with a corrugated fin structure, which enhances heat dissipation performance while ensuring good mechanical strength and a neat appearance.​

Core Structure​

Features a unique design with a rational yoke structure and precise lap joints.​

The core and the tank are positioned firmly in all directions to resist impact during transportation.​

Winding Design​

The windings adopt a concentric arrangement with an internal and external support structure. High-strength insulating materials are used between windings and between windings and the core to improve short-circuit impact resistance.​

Advanced Manufacturing Processes​

Employed processes include vacuum pressure impregnation, precision winding, and strict welding techniques, ensuring the quality and performance of the transformer.​

Normal service conditions​

Altitude​

No more than 1000m;​

Environmental temperature:​

The maximum temperature is +40℃;​

The maximum monthly average temperature is +30℃;​

The maximum annual average temperature is +20℃;​

The outdoor minimum temperature is -25℃.​

The waveform of the power supply voltage is similar to a sine wave.