Rockwell Automation 1512A MV Controllers - 800A One-High Cabinet - Manual (Page 81)

ArcShield Unit Information A-7
1512A-UM102B-EN-P – June 2013
Additional Notes
• The walls of the plenum exit area must be capable of withstanding the
pressure generated.
• Any painted surfaces which face direct contact with the arc products may
ignite. Flame suppression is recommended.
• The exit point can also be outside the building. Ensure exit area can not
be blocked by ice, snow, vermin nests
• Access barriers are recommended as a means of restricting access by
personnel while the equipment is energized. Chain link fencing is a
suitable barrier material.
• Equipment that consists of more than 4 vertical sections bolted together
may require additional plenum exits. Rockwell Automation will provide
guidance on requirements for additional plenum exits when required.
Chimney Information
A chimney can be provided for each unit, and is to be field mounted on
top of the unit structure. The purpose of the chimney is to direct the
hazardous flames and gases away from the top of the resistant enclosure
for the chimney is secured to the top of each unit structure. Refer to
Appendix C for chimney installation instructions.
Each ArcSheild line-up includes a chimney exhaust section that extends
vertically directly above the enclosure.
Chimney Exhaust
Considerations
1. From the outlet of the chimney, there needs to be a minimum
distance of 1.7m (67 in.) from the top of the chimney to the ceiling,
and 1m (37 in.) on each side.
2. No obstructions (eg. Piping) can be in path of the exhaust within this
2m (78 in.) height requirement.
Plan the location where the chimney will exhaust. Ensure that:
• There is no access to personnel while equipment is energized.
• Area is free of flammable material or vapours.
•
Ensure that adequate space is provided around the chimney
exhaust as outlined in Figure A.