Open AccessDielectric characteristic of dichlorodifluoromethane (R12) gas and mixture with N 2 /air as an alternative to SF 6 gas
Author(s) -
Ullah Rahmat,
Rashid Abdur,
Rashid Arooj,
Khan Faisal,
Ali Amjad
Publication year - 2017
Publication title -
high voltage
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.732
H-Index - 20
ISSN - 2397-7264
DOI - 10.1049/hve.2017.0047
Subject(s) - dielectric , analytical chemistry (journal) , nitrogen gas , nitrogen , chemistry , dielectric gas , materials science , composite material , environmental chemistry , organic chemistry , optoelectronics
In this study, dichlorodifluoromethane (R12) gas and mixtures with nitrogen (N 2 ) andair at different pressures and mixing ratios have been investigated and showedgood alternative to SF 6 gas in terms of high‐voltage application.Mixed gases contain R12 gas, they offer good dielectric properties andpossibility to be used in low‐temperature environment. Synergistic effects andself‐recoverability test have been performed. Dielectric strength underquasi‐uniform field showed in the order of SF 6 > R 12 > N 2 > air in alternating current (AC), directcurrent (DC) and impulse was examined. Mixture R12/N 2 (80/20%) couldreach over 0.90–0.95 times to that of SF 6 gas at 50 lb/in 2 at AC andR12/air (70/30%) gives 0.80–0.90 to SF 6 gas. R12 gas presents brilliantself‐recoverability. The optimal ratio to switch SF 6 gas is R12/N 2 (80/20%) andR12/air (70/30%) is based on the authors’ experimental condition and setup.