Arc-resistant Low Voltage Switchgear

For years, electrical equipment has been designed to withstand and deal with the issue of bolted faults, where the current spikes to a dangerously high level but is safely interrupted by the protective devices contained in the equipment (breakers, fuses and relays). However, these devices typically do not detect and interrupt dangerous internal arcing faults, which have a lower current level, but can generate a far more dangerous scenario for operating personnel. Arc faults can be caused by a breakdown of insulation materials, objects coming into close proximity with the energized bus assembly, even entry of rodents or other animals into the equipment. The thermal energy created by these events can get as high as 35,000ºF, melting materials and clothing from several feet away. Also consider that the arc blast produced by a lineup of 480 Vac switchgear rated at 85 kA can be equivalent to 20.7 lbs of TNT!

Standard features

• Ratings:
  
  • Up to 100 kA short circuit at 508 Vac maximum and up to 85 kA short circuit at 635 Vac maximum
  • Up to 10 kA horizontal mainbus continuous current
  • Up to 5 kA vertical bus continuous current
  • MagnumE DS power circuit breaker frame ratings between 800A and 6000A
• ANSI Type 2 arc-resistant design protects the operator around the entire perimeter of the equipment
• Floor-to-ceiling height of 10 feet required whether exhausting into a room or through an arc plenum Eaton’s solution to arc flash
• Strengthened one-piece breaker door and latches
• Dynamic flap system on rear ventilation openings that remain open under normal operating conditions, but close during an arcing event to prevent dangerous gasses from escaping
• Patented bellows design allowing drawout of breaker into the disconnected position with the door closed, while simultaneously protecting the operator from any dangerous gasses during an arc event
• Patented venting system that directs arc gasses out the top of the enclosure, regardless of the arc origination location
• Up to four-high breaker configuration with no additional layout restrictions
• Strengthened side and rear panels with standard split rear covers for cable access
• NEMAT 1 enclosure, with either top or bottom cable or bus duct entry
• Cable compartment floor plates

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