S20 series 10KV oil-immersed double-winding unexcited voltage regulation distribution transformer energy efficiency grade technical parameters
Rated Capacity | Voltage combination | Join group label | open circuit losses | Load loss W | short circuit impedance | no-load current | ||
high pressure(KV) | High pressure tap range(%) | low tension(KV) | W | W | % | % | ||
30 | 6 6.3 10 10.5 11 | ±5% or ±2×2.5% | 0.4 | Dyn11 | 70 | 505 | 4 | 1.5 |
50 | 90 | 730 | 1.3 | |||||
63 | 100 | 870 | 1.2 | |||||
80 | 115 | 1050 | 1.2 | |||||
100 | 135 | 1265 | 1.1 | |||||
125 | 150 | 1510 | 1.1 | |||||
160 | 180 | 1850 | 1.0 | |||||
200 | 215 | 2185 | 1.0 | |||||
250 | 260 | 2560 | 0.9 | |||||
315 | 305 | 3065 | 0.9 | |||||
400 | 370 | 3615 | 0.8 | |||||
500 | 430 | 4330 | 0.8 | |||||
630 | 510 | 4960 | 4.5 | 0.60 | ||||
800 | 630 | 6000 | 0.60 | |||||
1000 | 745 | 8240 | 0.60 | |||||
1250 | 870 | 9600 | 0.50 | |||||
1600 | 1050 | 11600 | 0.50 | |||||
2000 | 1225 | 14640 | 5 | 0.4 | ||||
2500 | 1440 | 14840 | 0.4 |




product feature
2, the core adopts high-quality cold-rolled silicon steel sheet, domestic excellent transverse shear line, shear burr <0.02, full oblique joint, no punching, no stacking iron wheel process; The double H adhesive makes the three columns of the core become a tight, flat and compact whole, effectively reducing the no-load loss, no-load current and noise of the transformer.
3, the transformer coil adopts high purity oxygen-free copper, which effectively reduces the copper consumption, the pad and the stay are rounded, the electric field is uniform, and the reliability is increased. The inner winding support is strengthened to improve its stability and prevent instability and deformation. For products with a capacity of more than 12500kVA, the internal and external coils are assembled with a unified integral plate and pressure plate at the same time, ensuring the consistency of the height and size of the coils along the axis, and improving the ability of the transformer to resist sudden short circuit.

5, the volume of the tank adopts the whole steel plate, which is folded into a corrugated structure by a large press, which reduces the weld, increases the mechanical strength, expands the heat dissipation area, and improves the heat dissipation effect. At the same time, the corrugated box wall avoids the plane reflection of the sound wave to reduce the noise. The transformer is beautiful and simple.
6, the capsule type oil storage tank effectively slows down the aging degree of transformer oil; The pointer type oil level meter can avoid the occurrence of false oil level phenomenon and completely solve the problem of light aging of transformer oil; Gas relay with gas collecting device for easy maintenance and operation; The chip radiator and large diameter low noise fan are used to improve the heat dissipation effect and reduce the noise.
7, for the original traditional sealing structure, especially where oil leakage is easy to occur, start from the material procurement control to ensure that the steel does not rust, bump, scratch, hammer, special processing of the oil tank sealing part, and the overall painting of the box, remove the sharp corner burrs and welding slag generated in the processing of the box, and strengthen the adhesion of the paint.

Difference between S20 transformer and S13 transformer
The difference between S20 transformer and S13 transformer is mainly reflected in the loss, S20 transformer than S13 transformer no-load loss and load loss are reduced by 10%, that is to say, S20-M series transformers are more in line with the national concept of energy saving and emission reduction, but also the future focus of the oil-immersed transformer model.
S20 transformer price
The S20 oil-immersed transformer meets the national secondary energy efficiency standards, so the S20 transformer price is higher than the S13 transformer, but the S20 transformer power consumption is about 10% lower than the S13 transformer, and the S20 transformer price is about 15% higher than the S13 transformer price.
At present, there are fewer manufacturers with S20 oil-immersed transformer production qualifications. If you need to customize S20 transformer, you may wish to visit our factory and customize S20 transformer on site.
According to the requirements of the national secondary energy efficiency standard, the winding scheme and coil material of the transformer are redesigned, and the temperature rise and loss of the winding of the S20 transformer are optimized.