Uses of Matlab software to size intrinsic safety barriers of the electric equipment intended for use in atmospheres with explosion hazard

摘要

Electrical equipments destined to operate in potentially hazardous environments are externally connected through intrinsic safety barriers. Their gauging should observe the safety standards in the field and it is made on grounds of a theoretical analysis, on which this paper focuses. The analysis of the safety barrier involves the consideration for two regimes: the non - periodical regime, and the oscillatory regime. To this purpose, a theoretical analysis of the barrier was made, in which the uniformly distributed parameters were considered to be concentrated. For each of the situations mentioned above, the analytical expressions of the output voltage and of the current through the barrier were inferred. The analysis of the safety barrier is made in MATLAB environment, through numerical simulation in SIMULINK.