The use of the 3M Cold Shrink as part of WCML’s auto transformer feeding system is expected to allow Network Rail a saving of £3 million compared to traditional methods.
To inter-connect 25kV feeders through the top of the tunnel in the horizontal plain, Network Rail and its WCML joint venture partner looked at various cable connection options and found that most could not achieve this aim.
Termination and joints can be quickly installed on-site and without the need to apply heat or using specialist tooling, hence reducing the amount of equipment that needs to be carried. However it was the fact that 3M Cold Shrink – unlike alternative methods – is flexible enough to enable the feeder system to connect to the insulated cable horizontally, that led Network Rail to choose this method.
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