Norm

NEN-EN-IEC 62770:2014 en

Vloeistoffen voor elektrotechnische toepassingen - Ongebruikte natuurlijke esters voor transformatoren en soortgelijke elektrische uitrusting

72,46

Over deze norm

Status Definitief
Aantal pagina's 34
Commissie Vloeistoffen voor elektrotechnische doeleinden
Gepubliceerd op 01-04-2014
Taal Engels
NEN-EN-IEC 62770 describes specifications and test methods for unused natural esters in transformers and similar oil-impregnated electrical equipment in which a liquid is required as an insulating and heat transfer medium. Use of natural esters is not recommended for electrical equipment that is open to the atmosphere. In this standard the term “natural esters” applies to insulating fluids for transformers and similar electrical equipment with suitable biodegradability and environmental compatibility. Such natural esters are vegetable oils obtained from seeds and oils obtained from other suitable biological materials and delivered to an agreed point, at a set time period. These oils are comprised of triglycerides. Natural esters with additives are within the scope of this standard. Because of their different chemical composition, natural esters differ from insulating mineral oils and other insulating fluids that have high fire points, such as synthetic esters or silicone fluids. Natural, ester-derived insulating fluids with low viscosity have been introduced but are not covered by this standard. Pertinent properties of such fluids are given in Annex B. This standard is applicable only to unused natural esters. Reclaimed natural esters and natural esters blended with non-natural esters fluids are beyond the scope of this standard. The chemical nomenclature and scientific notations used in the standard are in accordance with the IUPAC handbook (Quantities, Units and Symbols in Physical Chemistry).

Details

ICS-code 29.040
Nederlandse titel Vloeistoffen voor elektrotechnische toepassingen - Ongebruikte natuurlijke esters voor transformatoren en soortgelijke elektrische uitrusting
Engelse titel Fluids for electrotechnical applications - Unused natural esters for transformers and similar electrical equipment

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