On Load Tap Changing ONAF Oil Immersed Power Transformer YNa0d11 IEC

Low Temperature Noise Three-winding On-load-tap-changing Oil Immersed Transformer

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 Product Features of Low Temperature Noise Three-winding On-load-tap-changing Oil Immersed Transformer

1.1 Product standards

GB1094.1~2-2013

GB1094.3-2003

GB1094.5-2008

GB/T6451-2008

IEC60076

1.2 Low loss

Core all-helical stacking with STEP joints, and advanced stacking process, reduced the load loss, load current and electromagnetic noise.

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 Technology Features of Low Temperature Noise Three-winding On-load-tap-changing Oil Immersed Transformer

2.1 Use high-quality oxygen-free copper wire for the coils, choose adhesive - type transposition wire, to improve the overall strength. With accordance to design needs, coil (especially low-voltage, voltage regulator) can be winded on hard paper tube, the appropriate increase in the number of stays among the coil, will enhance the mechanical strength of the coil.

For the coil assembly structure, we use the standard structure of Tianan power transformers, with accordance to the design program result, cooling and insulation structure like oil separator can be placed inside the coil, to guarantee its superior reliability.

2.2 Use advanced kerosene vapor drying equipment to thoroughly dry the transformer, and the oil- pumping is carried out under complete vacuum condition, to ensure the insulation of insulators and oil, therefore greatly improved the safety and reliability of the product.

3. Parameter sheet of Low Temperature Noise Three-winding On-load-tap-changing Oil Immersed Transformer