6.6kV rating applied to Merlin Gerin MV Ringmaster Range .

In Electricity North Wests area they have primary substation network operating at 6.6kV and a fault level of 250MVA. The Ringmaster range is rated to 21.9KA therefore compatible but it returns an error code for the Pscc exceeding fault capacity as the rating of the ICU doesnt reflect this voltage change.