When Does Electrical Power Need To Be Automatically Disconnected?

1.	When Does Electrical Power Need To Be Automatically Disconnected?
Answer» X PURGE systems require internal power isolation on pressurization loss. Except: If power disconnection may lead to a more dangerous situation; Safety-critical systems, e.g. emergency shutdown, public ADDRESS, general alarm SYSTEM; which should remain powered when pressurization is lost. Many users require automatic power disconnection in Zone 2 & Division 2, if they believe: Safety is IMPROVED; Local operator reaction to alarms signalling pressurization loss is likely to be delayed. X purge systems require internal power isolation on pressurization loss. Except: Many users require automatic power disconnection in Zone 2 & Division 2, if they believe:

Answer»

X PURGE systems require internal power isolation on pressurization loss. Except:

If power disconnection may lead to a more dangerous situation;
Safety-critical systems, e.g. emergency shutdown, public ADDRESS, general alarm SYSTEM; which should remain powered when pressurization is lost.

Many users require automatic power disconnection in Zone 2 & Division 2, if they believe:

Safety is IMPROVED;
Local operator reaction to alarms signalling pressurization loss is likely to be delayed.

X purge systems require internal power isolation on pressurization loss. Except:

Many users require automatic power disconnection in Zone 2 & Division 2, if they believe:

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