Purged panel is used for housing normal electrical equipment in a particularly harmful & explosive environment. Originally designed for the consistent, strong and safe operation of centrifuges in unsafe areas, these Broadbent systems are designed for use in process plant operations where there is risk of explosion. Each purging system mentioned in below carries out the subsequent operations: Prior to start up, the system ensures the equipment to be purged is sealed and a small positive pressure (10mB nominal) can be maintained.
Any pressure loss will prevent further operation and purge failure will occur. Allows a high continuous flow of nitrogen through the equipment and exhaust via vent extraction until a low level percentage oxygen is attained.
A ‘Purge Failure’ is activated if the desired oxygen level is not attained in a pre-set time.
A low continual flow of nitrogen provides a positive pressure whilst the equipment is in operation. If during the purge cycle a fault occurs, the system will alarm and continue the operation without interruption thus preventing nuisance tripping. If during the purge cycle, one of the following ‘Purge Failures’ arises, the equipment will be isolated and the emergency purge introduced: Purged panels are extensively used with other industrial lighting equipments.
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