Arc flash limiting feeder breakers up to 2000 a

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Arc flash limiting feeder breakers up to 2000 A reduce arc incident energy on downstream equipment such as MCCs and PDPs Thru-the-door breaker operation allows unit to be operated/racked while door is closed; this reduces NFPA 70E PPE category by one level Rear-hinged doors allow easy access to cables; this reduces NFPA 70E 2004 PPE category by one level Benefits of using Power-Zone ® 4 in hospital applications: Drawout construction is required for quick circuit breaker change-out Transfer system requirements call for circuit breakers to close within five-cycles and stored energy circuit breakers are required for reliability Front access to control wires is desired for ease of installation, maintenance and upgrade Circuit breaker compartmentalization is required for system integrity Segregation of circuit breaker compartments, from bus and cable compartments, is required for equipment Isolation breakers without fuses are required for high short circuit current ratings up to 200 kAIR Switchboards – Rear Connected QED-6 with Masterpact ® Circuit Breakers and PowerLogic ® Monitoring Rear connected switchboards offer many of the same benefits of ANSI rated switchgear listed above. Short times withstand ratings on the breakers, and structures as well as high short circuit interrupting ratings. Lower equipment cost, drawout breakers (breaker frame sizes to 250 A to 5000 A) and maintainability for extended life are reasons this product is used in these facilities. Hospital Application Main service switchgear Paralleling switchgear QED-6 switchboard structures offer many of the same benefits as Power-Zone 4 switchgear. Some of these features differences are listed below. Masterpact and PowerPact ® circuit breakers have higher short time ratings and interrupting ratings than competitive products Up to eight Masterpact NT circuit breakers can be mounted in a single 30"-wide section PowerPact circuit breakers 250 A and 600 A frame for smaller loads Electrically operated breakers UL 489 rated and structure UL 891 listed 150 kA SCCR without fuses @ 480 V (200 kAIR @ 240 V)
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29 Switchboards QED-2 switchboards are used in almost every level of the hospital electrical system. Oftentimes, on smaller hospital systems, QED-2 switchboards make up the majority of the equipment installed. They are used for service entrance, supplying power to HVAC and building equipment, and to primary of 480 V transformers that supply 208/120 V power distribution units. We also supply custom solutions for paralleling equipment when using 4-pole breakers on high resistance grounded systems. The QED-2 switchboards along with 4-pole breakers provide maintenance isolation for generators. QED-2 switchboards are available with single or multiple mains and distribution sections. Individually mounted mains use PowerPact ® P- and R-frame electronic or Micrologic ® molded case circuit breakers through 2,500 A, Masterpact ® NW two-step stored energy electronic trip circuit breakers, for fixed or drawout applications through 5,000 A.
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