Rockwell Automation 1512B MV Controllers, 200/400A Two-High Cabinet, Standard and Arc-Resistant Enclosure - Manual (Page 83)

Rockwell Automation Publication 1500-UM055G-EN-P - May 2013 75
ArcShield Unit Information Appendix A
Figure 73 - Chimney Exhaust Space Requirements
Minimum H1: 1.7 m (67 inches)
Minimum H: 1 m (39 inches)
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, or 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.
H1
H