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5–15 kV arc-resistant switchgear Protection from the harmful effects of arcing faults Arc-resistant metal-clad switchgear is built to resist the effects of arcing faults occurring inside the switchgear assembly. An arcing fault produces a variety of physical phenomena, including sudden pressure increases and extreme localized overheating, which combine to destroy conductors, insulation, and enclosure parts. Internal arcing faults result in severe mechanical and thermal stresses on the switchgear assembly, and the materials involved in the arcing fault may produce hot decomposition products, either gaseous or particulate. A plenum and exit duct vents direct this away from personnel to a designated area. Arc-resistant switchgear making safety more comfortable The NECT calls for an arc flash boundary of zero around medium voltage switchgear if it has been successfully certified as arc-resistant switchgear per IEEET C37.20.7. With certified Type 2B arcresistant switchgear, arc flash boundaries are eliminated even when the control compartment doors are open (for Eaton switchgear, this includes the control compartment door in front of the circuit breaker). Eaton offers a wide variety of tested two-high switchgear configurations and bus transitions certified by ULT to protect personnel from arcing faults of up to 63,000A rms for a duration of 0.5 seconds. Type 2B ratings are available for all arc-resistant configurations, reducing required personal protective equipment even with control doors open. Fully tested system configurations (layout flexibility) • 36-inch-wide vertical structures • Two-high breaker configurations • • • Two-high configurations with auxiliary drawer, fuse drawer, and circuit breaker combinations The ability to mount devices on circuit breaker doors helps to minimize equipment size for two-high configurations Ability to mount protective relays, meters and other controls on each of the three compartment doors allows for more compact switchgear designs • Direct roll-in circuit breakers available in both upper and lower breaker compartments • Tested standard bus duct connections available upon request • Close coupling with medium voltage MCCs, transformers and other equipment tested to IEEE C37.20.7 • Metal-clad switchgear close coupled to medium voltage motor control sharing a single arc exhaust plenum and ducting system Rugged arc-resistant construction • Structure is built to withstand the effects of internal faults up to the maximum fault current rating of the switchgear • Formed steel compartment design provides sealed joints under fault conditions • Includes extra-strength, multipoint latches and robust door hinges to ensure that doors remain intact and latched during an arcing event • A welded heavy-duty door design safely contains the extreme forces of an arcing fault Integral safety features • Metal-clad construction certified to IEEE C37.20.2 provides maximum circuit separation and safety • Type 2B arc-resistant construction allows for all instrument compartment doors to be opened without sacrificing protection from a potential internal arcing fault • Door interlocks ensure that the breaker door remains closed unless the breaker is open and racked out • Through-the-door racking is provided to rack circuit breakers in or out without opening the arc-resistant circuit breaker door Safety enhancement options • • • Optional universal power racking device allows an operator to rack a breaker in from a distance Optional integral remote racking device allows racking of circuit breaker without the hassle of moving, connecting, and storing a large device Lifting pan available to lift circuit breakers from below Protection and metering • • • Eaton will incorporate any manufacturer’s microprocessorbased protective relays, including Eaton’s full line of protective relays featuring our patented Arc Reduction Maintenance SystemE Eaton will incorporate any manufacturer’s meters, including Eaton’s Power XpertT power quality meter, which detect sags, swells and harmonics in addition to comprehensive power measurements and logging Zone selective interlocking can be supplied upon request NNote: For comprehensive application information switchgear controls, please see Eaton’s Consulting Application Guide (Section 5). Ratings • Rated max voltage: 5 kV–15 kV • Maximum short-circuit rating: Up to 63 kA (5/15 kV Class) • BIL rating: 60 kV for 5 kV Class, 95 kV for 15 kV Class • Main bus ratings: 1200A, 2000A, 3000A, 4000A • 40 kA arc-resistant ratings are available for 27 kV and 38 kV class equipment with continuous current ratings up to 3000A NNote: 4000A rating requires fan cooling. Many configurations are available to create the perfect system to meet your needs. Refer to Eaton’s Consulting Applications Guide for complete details of available ratings and layout dimensions. Arc exhaust plenum Control Compartment Eaton’s arc-resistant switchgear has been fully tested in accordance with ANSI C37.20.7 (Type 2B). Auxiliary (V T, CPT or Fuses) Control Compartment (no relays) Dynamic Vent Arc-resistant standards Exhaust ducts can exit from front, side or rear. Two duct exits are required for switchgear rated 50 kA and higher. Contact factory with specific application questions. 1200A Breaker (with relay box) Control Compartment Auxiliary (VT,CPT or Fuses) Auxiliary (V T, CPT or Fuses) Blank or Transistion to Ampgard (no relays) Control Compartment Auxiliary (VT,CPT or Fuses) (no relays) (no relays) 2000/3000A Breaker (with relay box) 3000A Breaker (with relay box) 3000A FC Breaker (with relay box) Dynamic Vent Dynamic Vent Dynamic Vent Control Compartment Control Compartment Control Compartment Blank or Auxiliary 3000A FC Breaker (with relay box) 4000A FC Breaker (with relay box) Metal-clad switchgear standards ANSI / IEEE C37.20.2 Seismic qualification Seismic-qualified by actual testing to meet requirements of IBC 2006 and CBC 2007. Fan Control Compartment Auxiliary (VT,CPT or Fuses) (no relays) Control Compartment Fan Dynamic Vent Auxiliary (VT, CPT or Fuses) Control Compartment Fans located inside this compartment (no relays) Dynamic Vent Eaton Corporation Electrical Sector 1111 Superior Ave. Cleveland, OH 44114 United States 877-ETN-CARE (877-386-2273) Eaton.com © 2011 Eaton Corporation All Rights Reserved Printed in USA Publication No. PA02200002E / Z10595 April 2011 Eaton is a registered trademark of Eaton Corporation. All other trademarks are property of their respective owners.