Norm

NEN 11181:1993 en;fr

Geïmpregneerde isolatiematerialen - Toepassing van de analyse van opgeloste gassen bij de fabrieksbeproeving van elektrisch materieel

  • Deze norm is ingetrokken sinds 15-05-2007

29,08

Over deze norm

Status Ingetrokken
Aantal pagina's 18
Commissie Vloeistoffen voor elektrotechnische doeleinden
Gepubliceerd op 01-09-1993
Taal Engels, Frans
This standard specifies oil-sampling procedures, analysis requirements and procedures and recommends sensitivity and precision criteria for the application of dissolved gas analysis (DGA) to factory testing of power transformers, reactors and instrument transformers when DGA testing has been specified. DGA is a technique for detecting certain types of faults in oil-filled electrical equipment which may not be detected by conventional methods. The most effective and useful application of DGA techniques to factory testing is during the performance of long-term tests, typically temperature-rise and overloading tests on power transformers and reactors, also chopped lightning-impulse tests on instrument transformers. DGA may also be valuable for over-excitation tests run over an extended period of time. Experience with DGA results, before and after short-time dielectric tests, indicates that DGA is normally less sensitive and accurate than electrical methods for detecting dielectric failures. However, DGA may sometimes be a valuable source of relevant information of abnormal equipment behaviour.

Details

ICS-code 29.035.99
Nederlandse titel Geïmpregneerde isolatiematerialen - Toepassing van de analyse van opgeloste gassen bij de fabrieksbeproeving van elektrisch materieel
Engelse titel Impregnated insulating materials - Application of dissolved gas analysis (DGA) to factory tests on electrical equipment
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