Interruptions Incentive Scheme

It includes key characteristics such as: Date/time fault start/end Number of customers affected Restoration stages Cause and main equipment involved Status of fault in terms of its exclusion from the IIS scheme due to it being a one-off /severe weather fault The upstream primary substation to the fault More information about the IIS can be found on Ofgem's website or this document: RIIO-ED2 Regulatory Instructions and Guidance – Interruptions Methodological Approach Source: IIS returns post application of Ofgem decision one status of fault in terms of its exclusion from the IIS scheme due to it being a one-off /severe weather fault Manipulation: Includes all rows from unplanned fault reporting IIS returns with calculation of CI/CML removed, leaving source data only i.e. no calculated fields Addition: Inclusion of the sitefunctional location of the upstream Primary substation and its geopoint.

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