The three-phase oil-immersed distributing transformer applies new
type insulating structure and makes short-circuit resistance
strong. The iron core is made of high-quality cold-rolled
silicon-steel plate. High-voltage winding group is made up of
high-quality oxygen-free copper lines and it adopts multilayered
drum type structure. All fasteners have been processed with special
treatment to prevent them from loosening.
1.Spiral loops with longitudinal oil path to produce a better
interior cooling effect;
2.Improve the effectual support of the loop’s terminal face to
strengthen the anti-short circuit electricity capability;
3.New suspending structure and instrument-positioning frames to
guarantee that the long distance transport and movement will be
1.Oxygen-free copper lines of lower resistivity, which will become
smoother and burr-free after series of additional surface
treatment, so the load loss of our transformer is lower and the
electric performance is better.
2.High-quality silicon-steel plates which are of lower unit loss,
and the no-load of the transformers is lower.
3.High-quality wooden laminating insulation pieces, which won’t
split or move even under the influence of short circuit.
4.Thoroughly filtrated transformer oil containing less water, gas
and impurities, which makes our transformers work better.
5.High-quality rubber sealing material, which can prevent the
transformers form aging or leakage.
Good Technology and Economic Performance
Compare with S7 series product, S9 series product reduces the
no-load loss by 10%, load loss by 24% and no-load electric current
by 46%; as a result, the operating cost will drop by 19%. Improved
from S9 series product, S11 series product reduces the no-load loss
by 20%; no-load electric current by 70%85%; average temperature by
10K; noise level by 2-4db; and double the products’ service life.
Even under 20% overloads, it can also work for a long period of
Transformer Service Condition
Altitude cannot exceed: 1000m
Highest ambient temperature: +40°C
Highest daily average temperature: +30°C
Highest annual average temperature: +20°C
Lowest outdoor temperature: -25°C
|Tech data of 10KV grade S9 series distribution transformer|
|Rated capacity||Voltage combination(KV)||connection method||Dissipation(KW)||No-load current(A)||Impedance voltage(V)|