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Home See our solutions to access the grid or the electricity markets - Cataliz {{item}} {{item.label}} Quality of power supply: the solutions Quality of Voltage + (Q+) and Sup Quali + {{vm.currentItem}}

+ Because several industrial sites are more sensitive to this, RTE proposes optional services to constantly monitor power quality, with undertakings regarding voltage dips

The service Quality of Voltage + (Q+) consists of:

  • monitoring disruptions to power with the help of a quality measuring tool (installed and managed by RTE);
  • provide you with  factual information within 1 to 5 working days following the disruptions;
  • benefit from a cross-referenced analysis of the disruptions, to identify their origins over the network and determine their consequences on your facility;
  • commit to a maximum annual number of voltage dips to a standard gauge (depth greater than 30% for more than 400 ms), with possible compensation if the engagement threshold is exceeded (this threshold, from 1 to 4 dips tension per year, is reviewed every 3 years and can improve depending on the evolution of the history of voltage dips);
  • provide you with an annual report on disruptions.

This cross-referenced analysis will enable a diagnosis, allowing for targeted improvement actions over the network and/or, for your part, the desensitisation of your facilities.

The Sup Quali+ (Top Quality)+ service goes a step further in RTE’s commitment

It is aimed at clients that have attempted the desensitisation of their facility.

RTE proposes an improved commitment, with an additional template, taking into account more voltage dips than in the Q+ standard template: voltage dips whereby the depth exceeds 45% for 20 ms, or 30% for 200 ms, or 20% for 500 ms.

How to subscribe

To subscribe to the Q + or Sup Quali + solution, please contact your usual sales representative.

To get the Q+ solution, you must:

  • have a Consumer public transmission network access (CART) contract,
  • have taken out an Ancillary Services contract,
  • have been subscribing to the service for at least 3 years.

To get the Sup Quali+ solution, you must:

  • have been subscribing to the Q+ service for at least 3 years,
  • have obtained an assessment higher than the minimum required level in an independent audit of the desensitisation of your site. (an audit carried out by an independent company).


  • Service Q+: €2265/year per measuring device,
  • Sup Quali+ service: €4000/year of commitment.

The service includes the installation of a quality measurement device to collect the data (intervention provided by RTE within 3 to 6 months following your request).

Access for monitoring your power quality

Online information concerning disruptions, voltage dips and associated commitments can be accessed via your Personalized Customer Area.

Reference documents

Additional services