Product overview

The three-phase oil-immersed distribution transformer produced by our company adopts a new insulation structure to improve the short-circuit resistance; the iron core is made of high-quality cold-rolled silicon steel sheets; the high-voltage windings are made of high-quality oxygen-free copper wires. material and adopts a multi-layer cylindrical structure; all fasteners are treated with special anti-loosening treatments.

The product has the characteristics of high efficiency and low loss, which can save a lot of power consumption and operating costs, and has significant social benefits. It is a high-tech product .

Model and features

Normal service condition

The altitude does not exceed 1000m;
Ambient temperature: maximum temperature +40℃;
The maximum daily average temperature is +30℃;
The highest annual average temperature +20℃;
Minimum outdoor temperature -25℃.

Transformer product standard

GB 1094.1-2013
GB 1094.2-2013
GB 1094.3-2017
GB 1094.5-2008
GB/T 6451-2015
GB 20052-2020
IEC 60076

Performance technical index

Product standard :GB 10941.1-5 GB/T 6451-2015
Rated high voltage: 11, 10.5, 10, 6.3, 6kV
Rated low voltage: 0.4kV
Link group: Dyn11 or Yyn0
High pressure tapping range: ±5% or ±2x2.5%
Insulation level: LI75AC35/LI0AC5
Frequency: 50Hz

Reliable construction

On the basis of traditional structure and mature technology, our company has made many improvements, such as the adoption of:
Spiral coil with longitudinal oil passage, better internal heat dissipation;
The effective support of coil end face is improved, and the ability to resist short circuit current is stronger;
New lifting structure and body positioning structure are adopted to ensure more reliable in long-distance transportation and operation.
We also have many unique and reliable structures to serve you;
The selection of transformers with higher performance levels will have a higher level of technical content.

Quality material

The selection of oxygen-free copper wire with lower resistivity, and after a series of additional surface treatment, more smooth, no burr sharp Angle, so that the transformer load loss is lower, electrical performance is more reliable.
The selection of high-quality silicon steel sheet, with the improvement of the performance level, the use of silicon steel sheet with lower unit loss, so that the transformer no-load loss is lower.
Selection of high-quality laminated wood insulation, never cracking, even under the action of short circuit current, but also motionless.
The selection of transformer oil through deep filtration, lower water, gas, impurity levels, transformer work more reliable.
Selection of high quality rubber sealing material, effective anti-aging, prevent leakage.
All raw materials through the quality inspection, all raw material manufacturers are in accordance with the national standard IS09000 strict review.

Good technical and economic performance

The S20 series products reduce no-load loss, load loss and no-load current by 10%, 24% and 46%, respectively, compared with the S11 series. This resulted in a 19% reduction in operating costs.
S22 series products on the basis of S20 series, no-load loss is reduced by 20% on average; The no-load current is 70-85% lower than S20; The average temperature is reduced by 10K, the service life of the product is more than doubled, it can still run for a long time even under the conditions of 20% overload, and the product operation noise is reduced by 2-4 decibels.

Coil Core (R)

The R in S20(M)R- indicates that the iron core is rolled iron core, and the cold-rolled silicon steel sheet with high quality and low unit loss is used, without punching and punching, and the horizontal and longitudinal joints of the traditional iron core are eliminated.
Thus, lower no-load current is obtained, and the reactive power loss level of the transformer is lower. Thus, lower noise levels are obtained, making the transformer more environmentally friendly.
Integral iron core, the clamp is mainly to clamp the coil, thus further strengthening the coils resistance to short circuit current.

Full seal (M)

The M in S20(M)R indicates that the fuel tank adopts a fully sealed structure. Compared with the ordinary oil-immersed transformer, the fully sealed distribution transformer eliminates the oil storage tank. The wave fin of the oil tank replaces the oil pipe as a cooling and cooling element. The corrugated oil tank is made of high-quality cold-rolled sheet in a special production line. Prevent and slow down oil deterioration and insulation moisture, enhance operation reliability, normal operation maintenance-free.
After oil removal, rust removal and phosphating, the surface of corrugated oil tank is coated with three anti-rain, moisture-proof and anti-salt spray paint, which is suitable for use in metallurgical, petrochemical, mining and other environments.

Technical parameter

Overall dimension