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Calculating and Compensating for power transformer and cable (or line) losses – standard methods

This sets out basic standard methods for calculating electrical loss compensation factors for power transformers and cables (or lines) that need to be applied to Half Hourly Metering Systems (HHMS) used for Settlements. This is in the event the measurement transformers for a HHMS cannot be located at the Defined Metering Point (DMP), as set out in the relevant metering Code of Practice (CoP). Due to this non-compliance with the requirements of the CoP the Registrant of the HHMS needs to apply for a Metering Dispensation and it may be necessary to compensate the HHMS for electrical losses in any power transformers and/or cables (or lines) between the Actual Metering Point (AMP) and the DMP.