The Balancing & Settlement Code Procedure (BSCP) 515 and the Retail Energy Code (REC) Metering Operations Schedule set out the obligations and timescales imposed on the DNO to send commissioning information to the MEM (using the D0383 (MM00370) data flow), where the DNO has installed metering equipment, with Measurement Transformers. When the DNO installs Low Voltage Current Transformer (LV CT) metering units, that have been pre-commissioned off-site, the commissioning of the units is done before installation and separately to the Energisation of the Supply. When the Energisation status change is the responsibility of the Registered Supplier and is requested of the MEM using the D0134 data flow, notification of the change in energisation status is then sent to the Registered Supplier and the DNO by the MEM, using the D0139 (MM00036) For an LV fused supply, the DNO may not be aware of who the MEM is to send the commissioning information to via a D0383 (MM00370) until a D0139 (MM00036) is received. This is often the point at which the DNO first becomes aware that a fused supply is now Energised. This may be several days/weeks/months after DNO commissioning, and it is proving difficult for the DNO to meet their BSC obligations.

1. As the DNO, I only want to send the commissioning information using the D0383 (MM00370) when I am made aware that the site has now been energised by the Registered Supplier’s MEM for a CT Pre-commissioned meter, so that I can meet my regulatory obligations under the BSC
2. As a MEM I want to receive the information from the DNO in a timely manner to ensure my records are accurate and up to date, and that I can provide the Registered Supplier with information to ensure the metering point is accurately settled.