High-voltage electrical installations are governed by standard NF C13-200 and delivery stations supplied by a public HV distribution network are governed by standard NF C13-100.
French standards NF C13-100 and NF C13-200 prevent the electrical risks of overcurrents, earthing problems, fire risks, short circuits, soil pollution and environmental pollution. They protect people and property in direct or indirect contact with electrical installations.
NF C13-200 “applies to installations supplied with alternating current at a nominal voltage greater than 1,000 V and less than or equal to 245 kV, the preferred frequencies being 50 Hz and 60 Hz”.
It advises on the installation of annexes by providing advice on the design of installations: the most common electrical installation distribution architectures, classification of earth connection diagrams, examples of dielectric recovery devices, determination of the k factor, etc.
NF C13-200 states that dielectric oils from power transformers must be recovered using an appropriate device or a liquid dielectric extinguishing pit with an integrated recovery tank for transformers with a power rating of over 1,250 kVA. Above 40 MVA, oil-filled transformers must be fitted with a liquid dielectric extinguishing pit with a separate recovery tank.
- Dielectric recovery pits must be watertight and designed to withstand the temperature rise caused by the properties of the dielectric.
- Where several transformers share a recovery system, it must be designed to prevent fire spreading from one transformer to another.
- A fire trap must be used when the distance between the discharge pipes and the recovery tank is less than 15 m.
- Every precaution must be taken to ensure that the recovery tanks do not fill with water.
- Oil and water must be separated in a separate recovery tank using appropriate equipment.
- The extinguishing tank must contain at least 20% of the transformer’s liquid. The separate recovery tank may be common to several transformers, but with a capacity at least equal to that of the transformer with the highest capacity.
NF C13-100 “deals with electrical energy delivery stations, intended for the connection of a user or producer from the public distribution network at a nominal voltage greater than 1,000 V and less than or equal to 33 kV and with a maximum current equal to 630 A”.
Revised in 2015 to be consistent with NF C13-200, NF C13-100 strengthens the requirements for specifications relating to high-voltage electrical installations.
- Electrical substations must be large enough to allow for the installation and connection of appliances and equipment, as well as for checking and maintenance.
- The delivery substation is located on the site to be served so as to allow access to the substation from the public domain, limiting the length of its connection to the public distribution network.
- The MV substation and the control and protection devices of the delivery substation must comply with the distributor’s technical reference file, which sets out its specifications and authorised equipment.
- Addition of EUROCODE.
La NF C13-100 « traite des postes de livraison d’énergie électrique, destiné au raccordement d’un utilisateur ou d’un producteur à partir du réseau public de distribution sous une tension nominale supérieure à 1 000 V et inférieure ou égale à 33 kV et d’une intensité au plus égale à 630 A. »
Thanks to our highly qualified teams, we are able to offer you a wide range of electrical transformers that comply with the latest laws and standards in force:
- Trafo ELETTRO encapsulated dry-type transformers with enclosures up to IP54.
- Kolektor ETRA’s oil-fired power transformers are fitted with retention devices (BDRG ranges, TRT ranges, ERT ranges, TRT-LHD ranges, TRFLEX ranges), SPI filtration systems® , EXTICOV fire extinguishing covers® , Midsun bird protection® , GALVAGRID anti-corrosion coatings® RUST-ANODE® , SanerVib anti-vibration equipment® , HV insulator protection equipment.