International Journal of Power System Operation and Energy Management


Intrinsic safety (I.S) is a worldwide accepted standard to protect low power electrical circuits from the potentially explosive hazardous area. End users throughout the fieldbus world are demanding more power to connect more instruments to their Fieldbus segments in Class I, Division 1, and Class I, Division 2, hazardous location applications. The intention of this paper is to discuss the fundamentals and application of the recently developed High Powered Trunk (HPT) technology and Dynamic Arc Recognition and Termination Technology (DART) that gives engineers all the power they need to fully load a Fieldbus segment, even in a hazardous location than other. It also illustrates the essential technical safety aspects necessary for the demonstration of IS and explains the impact of these on the relevant international standards.





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