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Conventional Power Transformers

The most common application of power transformers to connect AC networks of different voltage levels to allow power exchange between them, while handling all specified requirements of each individual network.

Two kinds of transformers are offered to fulfil these needs:

Interconnection Transformers: 

It offers a galvanic insulation between primary and secondary networks and high adaptability to expected levels of performance and/or site conditions. Moreover, Alstom Grid ensures you that the design and rating of tertiary windings, couplings and arrangements are fully adaptable to your needs and constraints.


Compared with interconnection transformers of equivalent power flow, the autotransformer presentsa lighter and more economically optimised solution which is possible whenever the voltage ratio is between 1 and 2. However,autotransformers have non-disconnected windings, so this means there is no galvanic insulation between the interconnected systems.

Characteristically for complex regulation arrangements they impose a total mastership of dielectric phenomena. Designs for constant flux regulation at high voltages or booster schemes are part of theAlstom Grid mastery. For many years we have been supplying very high rated auto-transformers such as single phase up to 500 MVA and very high voltage up to 765 kV for networks all over the world.