Powerpact B Frame Circuit Breakers Page 61 Installation in Equipment

Installation in Equipment PowerPact B-Frame 15 to 125 A Circuit Breakers B-Frame Safety Clearance, IEC Standard For all types of PowerPact B-frame circuit breakers that use uninsulated power connections (for example, busbars, spreaders, or uninsulated compression lugs), the minimum clearance distance between the enclosure backplate and uninsulated power connections is shown below. When using uninsulated connectors be sure to maintain the proper clearance between live parts and the grounded metallic back pan or use the insulation screen. Minimum Enclosure Dimensions Operating voltage V < 690 V For devices equipped with: Clearance (mm) Between devices Between device and sheet metal Painted sheet metal Bare sheet metal A1 A2 B A1 A2 B No terminal accessories 0 30 mm (1.18 in.) 5 mm (0.19 in.) 0 40 mm (1.57 in.) 5 mm (0.19 in.) 5 mm (0.19 in.) Interphase barriers 0 5 mm (0.19 in.) Long terminal shields 0 5 mm (0.19 in.) A1 A2 B OF SD Trip A1 A2 B OF SD Trip A1 A2 B OF SD Trip D2 D1 E E OF SD Trip Minimum Safety Clearances to Bare Busbars Operating voltage V "d 690 V Clearances to live bare busbars 17 Spacing E "d 60 mm (2.36 in.) Spacing E > 60 mm (2.36 in.) D1 D2 D1 D2 200 mm (7.87 in.) 100 mm (3.94 in.) 120 mm (4.72 in.) 60 mm (2.36 in.) 0611CT1603 61 17. These clearances can be reduced for special installations as long as the configuration is checked by tests.

Previous Page
Next Page