A few metal clad switchgear (MCSG) trip failures were found in the past two decades and the main causes were found related to the characteristics of operation mechanism. Meanwhile, the characteristics of circuit breaker operation mechanism are related to its trip coil current. Mechanical model and electrical model for trip mechanism of circuit breaker of 23-kV GIS are proposed in this article. Trip coil current with different resist force and shaft gap are simulated with MATLAB. One medium voltage GIS trip coil current under different conditions are measured to make a comparison with computer simulation results. Finally, current patterns are proposed as quick reference data for diagnosing operation mechanism failure.
No takes yet. Share an insight, caveat, or question.
Cheng et al. (2008) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: