20KV LEVEL S13-M SERIES OF THREE-PHASE DOUBLE-WINDING DISTRIBUTION TRANSFORMER WITH OFF-CIRCUIT TAP-CHANGER

Description

20kv Ievel S13-M series of three-phase double-windinq distribution transformer with off-circuit tap-changer is using the type of S11-M serial full-sealed oiI-immersed type transformer it has nol oiI conservator moisture absorber and other devices. Coil is using Iayer-to-layer structure, ampere-turns evenly distributed, the insulation structure is reasonable and has a strong short circuit impact resistance Using the ripple fuel tank, wave wings can follow with the dilatation of transformer oil while dilatation, thereby make transformer internal maintain a certain pressure, enhance the reliability
of the operational.

Features:

1. Scientific computing tools: the transformer uses advanced electric, magnetic, thermal and mechanical computing software to calculate electro-magnetic field and magnetic flux leakage distributions, to analyze wave processes, and to select reliable insulation margin, thus to guarantee product reliability.

2. Reasonable structural layout: The transformer uses multilevel stepped lap helical structure to reduce the no-load losses and noise. Its core is supported by inside rods,and its winding uses cardboard tubes to enhance short circuits withstand capacity,we also uses baffle plate to direct the oil flow for reduction of winding temperature rise. Heterotypic radiators are applied to improve the cooling centers for reduction of oil temperature rise. All internal insulating parts and metal structural parts have round processed for reduction of partial discharge.

3. Advanced technology: Its core is automatically cut with high precision and few burrs. It works without folding the upper yoke, with surface coated double H curing adhesive and fastened. We have vertical winding machine with digital control tension device. Its active part adopts phase-assembly technology, and the lead is wholly pre-fabricated. Automatic control of Kerosene Vapor-phase drying process is used.

4. Perfect quality guarantee system: The company strictly controls the quality of products according to ISO19001 standard.

5. To meet the client’s needs, we can provide products of other voltage ratios, Vector Groups, and rated capacities, as listed in the table.

Product parameters：

35kV Three-winding Double-winding No Excitation Regulating Distribution Transformer

Application：

Packaging and Transportation：

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