The Zener barrier earth must provide a secure, robust, low-resistance path back to the source of supply for any fault currents which flow. As was already shown, In the case of mains breakthrough, this arrangement prevents unacceptable voltage and current levels from going to the hazardous area. Installation of an intrinsically safe system to connect a safety barrier to a field device requires a precise assessment. The Code of Practice for such installations must be strictly adhered to in order to ensure that the installation is safe.
We hope you enjoyed this presentation. Please ask the Hazcon team if you have any questions about intrinsic safety barriers and how to install them properly.
www.hazcon.com
