TY - GEN
T1 - Evaluation of the impact of supply quality on the failure time of varistor arresters using the two-way ANOVA
AU - Mulalo, Marwala
AU - Bokoro, Pitshou
N1 - Publisher Copyright:
© 2019 Chamber of Turkish Electrical Engineers.
PY - 2019/11
Y1 - 2019/11
N2 - This study investigates the impact of harmonics on the time to breakdown or failure of metal oxide Varistor. Electrothermal accelerated ageing test was conducted for a time- period 48 hours, with both clean voltage (without harmonics) and distorted voltage (with harmonics). The test temperature was kept constant at 135°C. Sixty varistor samples were used for each set of test, which consisted of three different applied voltage magnitudes: 50%, 60% and 70% of VimA. Recorded failure times for each tested sample were statistically analyzed, using the two-way analysis of variance, in order to investigate the impact of the quality of supply on the breakdown point of Metal oxide varistor- based surge arresters. Results show that harmonics may accelerate the breakdown time of these transient overvoltage units.
AB - This study investigates the impact of harmonics on the time to breakdown or failure of metal oxide Varistor. Electrothermal accelerated ageing test was conducted for a time- period 48 hours, with both clean voltage (without harmonics) and distorted voltage (with harmonics). The test temperature was kept constant at 135°C. Sixty varistor samples were used for each set of test, which consisted of three different applied voltage magnitudes: 50%, 60% and 70% of VimA. Recorded failure times for each tested sample were statistically analyzed, using the two-way analysis of variance, in order to investigate the impact of the quality of supply on the breakdown point of Metal oxide varistor- based surge arresters. Results show that harmonics may accelerate the breakdown time of these transient overvoltage units.
UR - http://www.scopus.com/inward/record.url?scp=85080853729&partnerID=8YFLogxK
U2 - 10.23919/ELECO47770.2019.8990522
DO - 10.23919/ELECO47770.2019.8990522
M3 - Conference contribution
AN - SCOPUS:85080853729
T3 - ELECO 2019 - 11th International Conference on Electrical and Electronics Engineering
SP - 341
EP - 344
BT - ELECO 2019 - 11th International Conference on Electrical and Electronics Engineering
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 11th International Conference on Electrical and Electronics Engineering, ELECO 2019
Y2 - 28 November 2019 through 30 November 2019
ER -