Tap Changing YNd11 Oil Immersed Distribution Transformer 220kV Arc Furnace ONAN

Outdoor 220kV Electric Arc Furnace Power Transformer Oil Immersed

The 220KV transformer adopted the full folding plate tank structure of 110KV transformer, making its structure more rational, easier for site installation and inspection. Combining our many years of design and manufacture experiences, the reliability and performance of the product have reached international advanced level.

Through continuous improvement and alteration, our products are with characteristics of low loss, low noise, low partial discharge, high short circuit withstand capacity, high impedance, and fully-enclosed structure. The series covers two-winding and three-winding off-circuit tap changing power transformer, on-load tap changing transformer and tap-changing auto transformer. Main features as follows:

1 Outdoor 220kV Electric Arc Furnace Power Transformer Oil Immersed Product Features

1.1 Product standards

GB1094.1~2-2013

GB1094.3-2003

GB1094.5-2008

GB/T6451-2008

IEC60076

1.2 Low loss

Optimization of electromagnetic calculations, using combined technology of electrical shielding and magnetic circuit, effectively controlled leakage, s0 as to reduce the load loss and to avoid partial overheating.

1.3 Low partial discharge

To ensure the safe and steady operation of the transformer under continuous rated voltage, our Electric Power Research Institute conducted loads of research to develop a more reasonable insulation structure, plus the strict technology specifications and technical staff experience, ensured the low partial discharge of our products.

1.4 High strength

Upper and lower clamps and the formation of tight fixed side beam frame.

2 Outdoor 220kV Electric Arc Furnace Power Transformer Oil Immersed Technology Features

2.1 For the core fabrication, we use high quality and superior performance Hi- B silicon steel sheet, using the CNC controlled CEORG core cutting line, ensure the silicon steel burrs and angle error, so that after the cutting, it can be moved to the stacking process right away.

For the core stacking, we adopted 45 degree full reclining, multi- joint core type. Core columns are pre-compressed use synthetic material or steel ribbon, together with the corresponding fixture and process condition, to ensure the clamping force in a reasonable condition, for the assurance of core quality.

Use spherical measures to eliminate the possibility of interior line deformation under the short circuit status.

2.2 Changed the traditional process of coil assembly. use pre- assembly structural design, with the technology and craft, to avoid decrease of mechanical strength caused by the overall contraction during the drying process.

Use imported laminated wood at coil ends, with good mechanical and electrical quality.

Constant pressure device is used during the transformer assembly process, to apply axial pretightening force on the three-phase coil and insulation parts.

3.Outdoor 220kV Electric Arc Furnace Power Transformer Oil Immersed  Parameter sheet