Open AccessInfluence of the Test Current on Dynamic Resistance Measurements of SF6 Circuit Breakers
Author(s) -
Yufeng Lü,
Yi Su,
Zhaoting Liang,
Yifan Lu
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/310/4/042006
Subject(s) - circuit breaker , current (fluid) , contact resistance , electric arc , test method , electrical engineering , materials science , engineering , composite material , mathematics , physics , electrode , statistics , layer (electronics) , quantum mechanics
In order to study the influence of the test current on the dynamic resistance measurement of the SF 6 circuit breaker with different erosion degrees, simulated erosion experiment was carried on 126 kV SF 6 circuit breaker. The result shows, that the higher the test current is, the smaller the resistance of arcing contact when the circuit breaker is of any degree of erosion, but there is always no obvious link between the arcing contact travel and the test current. In addition, the dispersion of the test results decreases with the increase of the test current. However, when the erosion of the circuit breaker is very serious, the dispersion of results will be great regardless of the value of the test current. Therefore, considering the influence of test current on contact resistance, in order to obtain actualarcing contact resistance and to reduce the dispersion of test results considering the influence of test current on contact resistance, the larger dynamic resistance test current should be chosen as much as possible, and the dynamic resistance test must be carried on many times when contact erosion is extremely serious, so that the state of arcing contact can be obtained according to the distribution of test results.