Tightening of bus connector bolts
For multi-bolt joints, overall resistance is effectively the resistance of a single bolt divided by bolt count—making torque consistency even more critical. The elastic washers placed on the external sides of the connections and busbars help ensure for distribution of stress induced by the screw torque. To connect PROFIBUS cables there are bus connectors with cut-and-clamp technology for FastConnect systems and with screw terminals. Rather than enforcing fixed overlap dimensions or bolt counts based solely on rated current, standards now focus on verified performance outcomes, including: This flexibility allows manufacturers to optimize busbar joint design based on product architecture, enclosure layout, and real test. We have recently reviewed our company's bus torque chart and found some of the values are in line with the bolt mfg suggestions (i.
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