Fast deployable transformers for high-voltage transmission systems

A severe incident can put a transformer out of service for months or even over a year while a replacement is procured or heavy repairs effected. To be able to serve customers in the interim, an alternative is needed. One solution is to deploy a mobile transformer. Such a transformer is sufficiently small and light to be able to be moved by road, either in one piece or in a way that permits rapid assembly and commencement of service. Until now, mobile transformers have been limited to 230 kV. However, through innovative design, 400 kV mobile transformers now exist.

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