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QOU240VH Datasheet(PDF) 8 Page - List of Unclassifed Manufacturers |
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QOU240VH Datasheet(HTML) 8 Page - List of Unclassifed Manufacturers |
8 / 32 page 8 © 2005 Schneider Electric All Rights Reserved 09/2005 QOU Miniature Circuit Breakers and Switches Application Information UL HACR Type HACR is an acronym that designates circuit breakers certified to be used on heating, air conditioning, and refrigeration loads. The 9th edition of UL489 eliminated special testing requirements for HACR certification, and the 2005 NEC eliminated the requirement for special HACR marking. HACR marking is no longer necessary for circuit breakers used in these applications in states and localities where the 2005 NEC has been adopted. QOU circuit breakers will continue to carry the HACR marking to meet the rquirements of previous NEC Sections 430 and 440 in areas where the 2005 NEC has not yet been adopted. In older versions of the NEC, Article 430-53(c) required that each circuit breaker must be of the inverse time type, and be approved for group installation. The 2005 NEC eliminated the group installation clause of this article. The following QOU miniature circuit breakers will continue to carry the HACR label: • 10–100 A, one-pole • 10–125 A, two-pole • 10–100 A, three-pole High Magnetic QOU-HM circuit breakers are recommended for area lighting (athletic fields, parking lots, outdoor signs, etc.) when using lamps of inherent high inrush current or individual dimmer applications, or other applications where high inrush current exceeds standard tripping conditions. These circuit breakers are available in 15 A and 20 A only. QOU-HM circuit breakers are manufactured with the magnetic trip point calibrated at a much higher level than standard QOU circuit breakers. Table 4 lists the magnetic trip levels to which high-magnetic circuit breakers are calibrated: Table 4: QOU-HM Circuit Breaker Magnetic Trip Levels QOU-HM Circuit Breakers Max. Full-Cycle Magnetic Hold Level 15 A 21–35 x In 315–525 A 20 A 16–26 x In 322–537 A |
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