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Distribution auto-transformer / high-power - max. 500 MVA, 765 kV
There are 2 types of power transformers that can connect to AC networks of different voltage levels to allow power exchange and handle requirements of each individual network. These are the called the PTR L1 Transfo-MD Interconnection Transformers and Autotransformers. The interconnection transformers offer an insulation between primary and secondary networks and high flexibility to expected levels. Interconnection transformers have Alstom Grid. This ensures that the design of tertiary windings, couplings and arrangements that can adapt to the needs and constraints of the customer. The Autotransformers, on the other hand presents a lighter and more economic optimized solution. The other difference between the 2 is autotransformers have non-disconnected windings which means that there is no insulation between the interconnected systems.