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:
- Altitude: ≤2000m
- Maximum environmental temperature:
- Maximum annual average temperature
- 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
Voltage |
Max RMS voltage of transformer kV |
Rated short-time power frequency RMS withstand voltage kV/min |
Rated lightning impulse withstand voltage full-wave (peak) kV |
≤1 |
≤1.1 |
5 |
/ |
6 |
7.2 |
25 |
75 |
10 |
12 |
35 |
95 |
20 |
24 |
50 |
120 |
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