Medium And High Voltage Electric Powertransformers

Product Description

We provide transformers: Low, medium and high voltage transformers, both oil immersed and dry types, normal and specific transformers. These transformers' rated voltage ranges form 10kv to 500kv. With capacity ranging of 30KVA to 900mva.

Transformehave been continuously improved in design and manufacturing technology, and achieved international level, the product meets GB(Chinese National Standard)and IEC standard. We have full ability to design and manufacture transformers of three phase unit and single phase bank for power station. The transformers have been installed in China and around the world.

Take 110kv class for example:
The110kV class low loss transformers are developed by Huapengour workshop through years of service experience and careful analysis of the advantages and disadvantages of the transformers of different manufacturers, both domestic and abroad, and are featured by low loss, low partial discharge, low noise, high strength against short circuit, and high reliability in service. Its outstanding performance has won high reputation throughout China, and the world, and are highly appreciated by experts of the circle. Transformers can be made with welded tank cover and/or flange, Thus obviated from the necessity of lifting out the active part for inspection after arrival on site.

Partial discharge level: Apparent discharge < 80pC at 1.5 times rated voltage.
Noise level: Below 58 dB for transformers 63MVA and below with AN cooling
Losses: No-load loss 30% lower than specified by GB/T 6451-1995
Reliability: No damage or oil leakage have been found in transformers in service up to the present

Short-circuit withstand capability: Our SZ9-31500/110, SSZ-50000/110 transformers successfully passed short-circuit test in National Transformer Quality Inspecting and Testing Center, and in CESI Laboratory of Italy.

Main characteristics of transformer for 300mw, 500mw 600mw power plants, from 110kv to 600kw.
1. Reasonable structure Using our own R&D results and programs to analyze the electricity, magnetism, heat and mechanic force in transformer to determine the type of winding, insulation structure, tank shielding, the layout of lead exit in order to perfect the product's structure.
2. Advanced performance The transformer loss reaches the international level, impedance voltage can meet the requirements of different users, partial discharge is far lower than the data of GB (Chinese National Standard) and IEC standard.

3. Operation stability Calculations and analyses of the oil flow in the cooling system and temperature field in the windings have been done to determine the reasonable structure of oil flow path and to control temperature.
4. Reliability and safety From the calculation result of impulse voltage distribution in windings to optimize adjusting capacitance parameters in the different parts of the windings, to reach the best impulse voltage distribution.