Rockwell Automation 7763 Medium Voltage OneGear SMC Flex Motor Controller (10-15 kV) - Manual (Page 124)

124 Rockwell Automation Publication 7760-UM001D-EN-P - October 2014
Appendix A 7760, 7761, 7762, and 7763 SMC Flex Specifications
Table 44 - Power Bus Specifications
Description Specifications
Main Power Bus
Bus Bar Material Tin-plated insulated copper
Optional Power Bus Plating Silver
Continuous Current Rating at 40 °C (104 °F) 1250, 2000 A
Maximum Full Load Temperature Rise 65 °C (149 °F)
Maximum Full Load Temperature 105 °C (221 °F) @ 40 °C ambient
Fault Withstand Current Rating (3 seconds) 31.5 kA RMS SYM
Type of Bus Bracing Epoxy cast, glass polyester
Dimensions per Phase 1250 A
2000 A Qty 1 – 10 x 80 mm (3/8 x 3 in.)
Qty 2 –10 x 80 mm (3/8 x 3 in.)
Cross Sectional Area per Phase 1250 A
2000 A 800 mm² (1.125 in.²) total
1600 mm² (2.25 in.²) total
Insulating Material Between Phases and Ground
Type: Sleeve, heat shrink
Material: Polyolefin
Thickness: 3.0 mm (0.12 in. / 120 mils)
Anti-hygroscopic: 0.25%
Electrical Strength: 500V/mil (20 kV/mm)
Unit Bus
Bus Bar Material Bare copper
Optional Unit Bus Plating Tin or Silver
Continuous Current Rating at 40 °C (104 °F) 630 A
Fault Withstand Current Rating 31.5 kA, 100 msec
Insulation Material (where required)
Type: Sleeve, heat shrink
Material: Polyolefin
Thickness: 3.0 mm (0.12 in. / 120 mils)
Anti-hygroscopic: 0.25%
Electrical Strength: 500V/mil (20 kV/mm)
Ground Bus
Ground Bus Material Bare copper
Optional Ground Bus Material Tin-plated copper
Continuous Current Rating at 40 °C (104 °F) 600 A
Dimensions 600 A 8 x 50 mm (5/16 x 2 in.)
Cross Sectional Area 600 A 400 mm² (0.625 in.²) total
Fault Withstand Current Rating (3 seconds) 31.5 kA