Intrinsic Safe Barrier as Surge Protectors


Thread Starter

Kumar G

Can intrinsic safe barriers also serve the purpose of surge protection from any external Surge Source on the control loop cable in field, or just current limitation in case of any fault in loop circuit to prevent hazard?
Its a late reply hope that helps future searchers.

You have to check EMC documentation of the barrier you want to use. According to IEC 61326 surge protection for the Criteria A the electronic components should stand (keep working) under the load of 1kV of surge charge. Generally barriers/isolators are Criteria B for surge protection, meaning they can go back to normal operation after a short disruption.