1. Energy conserving

Compared with the original S9 type, no-load loss of S11 decreases by 10.25% averagely, no-load current decreases by 37.9%, and the running expense decreases by 18.9% averagely.

2. High reliability

Structurally improve the effective supporting of both HV and LV coil end faces, adopt the new body location structure. Expand the application scope of the cylindrical coil, and adopt a series of new material, new subassembly, new fastening pieces and new process to make both the performance of the product and structure reach up to higher level, improve the running reliability of the product.

3. The service life is prolonged

Compact structure, small volume, low noise, high efficiency and steady performance of S11 series of transformers prolong the service life of transformers.

S11 series of oil-immersed transformers produced by our company are low loss series of products that have international advanced level. The energy conserving effect is significant. They can be widely used in urban and countryside industrial and agricultural power grid. The iron core adopts the new process of the stepping lamination, resulting in improvement in no-load performance and reduction in noise.

Transformers are equipment which convert the voltage transmitted by the grid to lower voltage as required by the system or load. Amorphous alloy transformers are widely used in the distribution systems of urban and rural areas. The main feature of the product is that it can significantly reduce no-load loss of transformers, and is especially suitable for areas which lack power, have a fluctuating load, low load rate, or hard to perform daily maintenance. Because the insulating medium cannot easily be polluted by air due to the full seal structure, the transformer can be operated in humid environments, which is ideal distribution equipment for urban and rural grids. The products will save energy and decrease pollution to the atmosphere effectively if they are widely installed and operated properly.

Working conditions:

1. Altitude: ≤2000m
2. Maximum environmental temperature:
3. Maximum annual average temperature
4. Customized products are available.

Transformer cores are made of amorphous alloy strips, with no-load loss 70% lower than the current S11 types. Its performance parameters comply with the requirements of GB/T25446-2010 standards.

The LV winding of the transformer is foil wound, which increases the mechanicalintensity of windings and improves the ability of transformers to endure short circuits.

The connection symbol of the transformer is Dyn11, decreasing the impact of harmonic wave on the grid and improving the quality of power supply.

We adopt a full seal structure in oil tanks of transformers, preventing the insulating medium from coming into contact with the air, prolonging the use life of products and increasing the operational reliability of transformers.  

The transformer uses vacuum oiling, which can eliminate the bubble in windings completely, and ensure stable and reliable insulation performance.

To ensure transformers can be operated safely and reliably, we will carry out a full wave thunderbolt surging test on each transformer at a peak value voltage which is 25% higher than that of the national standards. (We don’t have the ability to do a surging test currently.)

Because the acceptability of amorphous alloy cores to mechanical intensity and the mechanical strength of rectangle wirings are weak, it is difficult to pass the test for short circuit of amorphous alloy transformers successfully in the transformer field. Our company overcame the difficulty with our mature technical expertise and experiences, which indicates the transformer design and manufacture technology of our company is among the best in the domestic transformer industry.

Insulation Level of the Product

Product Standards

GB1094.1-1996 Power Transformer   Part I     General Rules

GB1094.2-1996    Power Transformer   Part II    Temperature Rise

GB1094.3-2003    Power Transformer   Part III    Insulation level, insulation test andexternal insulation air gap

GB1094.5-2003    Power Transformer   Part V    Ability to withstand short-circuit

GB/T25446-2010   Technology parameters and requirements for oil-immersed amorphous alloy distribution transformer

GB/T22072-2008   Technology parameters and requirements for dry-type amorphous alloy core distribution transformer

GB1094.11-2007    Dry-type power transformer

IEC 60076              Power transformer