China Electrical Power Transformer manufacturer

6.6KV/S11 Oil-immersed transformer fully sealed two windings

Product Details:
Place of Origin: China
Model Number: s11
Payment & Shipping Terms:
Minimum Order Quantity: 1
Price: 200-200000/piece
Packaging Details: wooden case
Delivery Time: 15 DAYS
Payment Terms: LC T/T
Supply Ability: 5000 pieces/year
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Detail Information

Usage: Power Product Name: Three Phase Oil Transformer
Frequency: 50Hz/60Hz Output Voltage: Customize
Color: Optional Application: Change Voltage
Place Of Origin: Qingdao,China
High Light:

oil immersed distribution transformer


oil immersed power transformer

Product Description

oil-immersed transformer S11,30-2500KVA,6.6KV series,3 phase/fully sealed/double winding


                                                 6.6KV/S11  Oil-immersed transformer  fully sealed two windings 0

Product Features:

6.6 KV - S11 type three-phase oil-immersed transformer insulation structure of advanced and reasonable, anti-short circuit ability strong, the performance reached the international advanced level of similar products, compared with the integrated type products, no-load loss dropped 10.25% on average, a 37.7% drop in no-load current, average load loss by 22.4%, and beautiful shape, reasonable structure according to user requirements can be tank type and tube type radiator.


Technical data


Rated Capacity



H.V. winding




Tapping range

of high voltage


L.V. winding


Vector Group



Load Loss



current (%)

Short-circuit impedance


S11-30 30


















































100 630/600 2.3 4
S11-50 50 130 910/870 2
S11-63 63 150 1090/1040 1.9
S11--80 80 180 1310/1250 1.9
S11-100 100 200 1580/1500 1.8
S11-125 125 240 1890/1800 1.7
S11-160 160 280 2310/2200 1.6
S11-200 200 340 2730/2600 1.5
S11-250 250 400 3200/3050 1.4
S11-315 315 480 3830/3650 1.4
S11-400 400 570 4520/4300 1.3
S11-500 500 680 5410/5150 1.2
S11-630 630 810 6200 1.1 4.5
S11-800 800 980 7500 1
S11-1000 1000 1150 10300 1
S11-1250 1250 1360 12000 0.9
S11-1600 1600 1640 14500 0.8


Structural characteristics

1, all the use of high quality grain orientation cold rolled silicon steel sheet iron core, all inclined non-porous binding structure, iron core is multi-step ladder, three or five joints, low air loss, low noise;The coiling iron core is directly wound by special equipment, without joint and Angle weight, which reduces the magnetoresistance and reduces the air loss.Compared with traditional silicon steel sheet, amorphous alloy transformer core can reduce the air loss by 72% and the no-load current by 50%.


2, coil: the use of high quality retractable enameled round copper wire, no oxygen copper rod drawn flat copper coin or copper knot winding, its form is cylindrical, continuous, new spiral, split, etc., with sufficient electrical strength, mechanical strength and heat dissipation capacity.


3, tank: adopt high quality steel plate welding and become, such as elliptic shape, structure, heat dissipation component adopts chip radiator, expand the radiator or corrugated tank, fuel tank and reliable sealing experiment was carried out in the factory, both inside and outside surface after pickling, phosphating treatment, for three times primer, a paint spraying again, product has, hot and humid, salt mist prevent mould, beautiful and durable.



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.
High-quality silicon-steel plates which are of lower unit loss, and the no-load of the transformers is lower.
High-quality wooden laminating insulation pieces, which won’t split or move even under the influence of short circuit.
Thoroughly filtrated transformer oil containing less water, gas and impurities, which makes our transformers work better.
High-quality rubber sealing material, which can prevent the transformers form aging or leakage.





6.6KV/S11  Oil-immersed transformer  fully sealed two windings 1


·Service conditions

1. The maximum ambient air temperature shall not exceed 40 ℃, and the minimum shall not below - 25 ℃;

2. The altitude shall not exceed 1000m. If special customized transformers and low-voltage components are used, the altitude can reach 4000m;

3. The vertical inclination is no more than 5 °, and no violent vibration and impact;

4. The air humidity is not more than 90% (+ 25 ℃);

5. No gas and conductive dust that will seriously affect the insulation of transformer, no explosion hazard and corrosion of electrical components;

6. Outdoor wind speed shall not exceed 35m / s.

7. If service conditions beyond the above, specially customized product is available.



6.6KV/S11  Oil-immersed transformer  fully sealed two windings 2



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6.6KV/S11  Oil-immersed transformer  fully sealed two windings 3

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