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Interior of the transformer is isolated from air, so the transformer oil can not absorb outer moisture and oxygen since change of transformer's volume could be fixed with flexibility of corrugated tank structure. Then aging speed of insulated material will be decreased. Before being put into operation, suspension of core is not necessary to be checked. Clients could also be free from later maintenance and reparation. Reliability is visibly upgraded. the transformer is designed with PC CAD, Its characters are conformed to IEC 60076 and GB 1094, and qualification of ISO 9001.
Overview & featuresS11 Series of three-phase oil-immersed distribution transformer adopts new type insulation structure in its whole body, quitely improving its short-circuit resistant capacity; its core is made of high quality cold-rolled steel sheet; all HV. windings are made of oxygen-free copper, and constructed in multi-layer barrel type structure; all fasteners have treated with special tightening treatment.
Having many good features such as high efficiency, low loss, the transformer can save much electric energy and running cost, having had significant social benefits, It is a real high-new-tech product which has been popularized by many nations.
Depending on mature technologies, we made a lot of improvements on the basis of traditional structure:
>>Spiral winding with longitudinal oil duct that enjoys good inner heat dissipation;
>>Effective support at winding end surface that further improve the short-circuit resistant capacity of winding;
>>Adoption of new hoisting structure and body positioning structure that guarantee safety in long-distance transport and in service;
>>More unique and reliable structures for your option;
>>Adoption of transformers with more excellent performances to improve the technical content.
>>Because we use oxygen-free copper wires of lower resistivity, which will become smoother and burr-free after a series of surface treatment, so the load loss of our transformer is lower and the electric performance is better.
>>We use high-quality silicon-steel sheets which are of lower specific loss, so the no-load loss of the transformers is lower.
>>We use high quality wooden laminating insulation pieces, which won't split or move even under the influence of short circuit current.
>>We use thoroughly filtrated transformer oil containing less water, gas or impurities, which makes our transformers work better.
>>We use high quality rubber sealing material, which can prevent the transformers from aging or leakage effectively.
>>All raw materials have passed the quality testing, and all the raw material factories have passed the national standard IS09000 inspection.
Good technology and economic performance
Improved from S9 series product, S11 series product reduces the no-load loss by 31%; no-load current by 75-90%; average temperature-rise by 10k; noise level by 3-5 db; and double the products' service life. Even under 20% overloads, it can also work for a long period of time.
>>Installation height: altitude shall not exceed 1000m
>>Ambient temperature: -40oC~40oC
Dimension & SchematicTechnical parameters
|Rated capacity||Installation dimension|
|Rated capacity||Voltage combination||Connection group||Loss (KW)||No-load current||Short-circuit impedance||Weight (kg)|
|kVA||HV kV||High-voltage tapping range||LV kV||symbol||No-load||On-load||%||%||Oil weight||Gross weight|
1. High-voltage tapping range of ±5×2.5% or ±2×2.5% is available on request.
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