The "Voltage" dataset details historically measured average voltage for each Grid and Primary circuit for each half-hourly period.Note, this data has been triaged to remove information pertaining to individual customers or where the dataset contains sensitive information.This dataset is updated on a weekly basis.Definitions:NameDescriptionUnit of MeasurementNetwork Group NameThe unique name given to the network demand group supplied by the Primary or Grid transformers.In our SPM license, some of our network operates solidly interconnected. For example, geographically dispersed single transformers may supply interconnected network instead of multi-transformer substations. For more information on network arrangements, including both Single Line schematic diagrams and geographical maps please refer to our Long Term Development Statement (LTDS).N/ATimestampDate / time that the data was recorded - data is provided at half hourly intervals over a 12 month period.N/ANominal VoltageRefers to the nominal operating voltage of the network group.kilovolts (kV)Actual Voltage T1Actual voltage of transformer 1 for the network group.kilovolts (kV)Actual Voltage T2Actual voltage of transformer 2 for the network group.kilovolts (kV)Actual Voltage T3Actual voltage of transformer 3 for the network group.kilovolts (kV)Actual Voltage T4Actual voltage of transformer 4 for the network group.kilovolts (kV)Actual Voltage T5Actual voltage of transformer 5 for the network group.kilovolts (kV)Actual Voltage T6Actual voltage of transformer 6 for the network group.kilovolts (kV)Whilst all reasonable care has been taken in the preparation of this data, SP Energy Networks is not responsible for any loss that may be attributed to the use of this information.