020 CVA Risk: CVA Metering Equipment Installation and Commissioning


This page outlines the Risk that CVA Metering Equipment is installed, programmed or maintained incorrectly including where Commissioning is performed incorrectly, or not at all.

How it relates to you

Parties responsible for risk factors

  • Licensed Distribution System Operator
  • CVA Meter Operator Agent
  • non-Performance Assurance Parties

Parties responsible for risk controls

  • Registrant
  • Licensed Distribution System Operator
  • CVA Meter Operator Agent
  • non-Performance Assurance Parties

Potential causes

Potential causes, or as they known in the Risk Evaluation Register: Risk Factors are the points of failure that could result in erroneous or estimated data entering Settlement.

Elexon has identified a number of typical failure points related to this risk, parties should note the list is non-exhaustive, and not all risk factors are applicable to every role type.

  • Incorrectly installed wiring (e.g. polarity reversed, etc.)
  • Incorrect Measurement Transformer ratios for circuit (i.e. not operating in accurate current range)
  • Shorted Current Transformer links left in place resulting in no current signal to Meter
  • Fuses not installed or blown resulting in no voltage signal to Meter
  • Faulty Metering Equipment batches
  • Incorrect Measurement Transformers ratios programmed into Meter
  • Clock trimming by CDCA (e.g. Outstation not trimmed, incorrect time used in installation)
  • Different participants Commissioning resulting in no end-to-end testing
  • Responsible Party or third party performs installation without Commissioning
  • Commissioning records not completed correctly or notified incorrectly to CDCA
  • Expired Metering Dispensations resulting in non-compliant metering

Potential solutions

Parties responsible for operating controls should take note of the information below. The information below identifies the BSC Sections and Procedures relating the risk.

Review the processes outlined in the following documents and ensure that internal processes match the requirements:

Impact of this risk on the industry

  • Impact: £1.0 Million
  • Upper Impact: £1.7 Million
  • Volatility: Medium

In order to calculate the impact this risk has on your Party, multiply your market share by the impact as outlined above.

Further information

Risk Evaluation Register sets out further detailed information on the noted controls. Details can be found under Associated Documents. 

Support and training

Operational Support Managers (OSMs) are able to help with further information or training on this risk and associated processes.

Methodology used for this risk

The following documents outline the methodology used to assess the Settlement Risk related to Agent appointments.



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