5.4.11.6  Plug-In Connectors

Plug-in connectors are in common use for connecting equipment to a busway. Devices connected to busways cover a wide range of industrial control equipment ranging from individual circuit breakers to feeders for panel boards. Under certain conditions, fretting can occur in the connector-busbar interface owing to the same type of relative motions as in the bus-stub contacts as discussed above. The connector assemblies used in these applications must reliably conduct currents ranging from 100 A to several thousand amperes throughout the lifespan of the bus duct system. Thiesen and Forsell [69] designed a special fretting testing system to investigate the performance of a typical 200 A plug-in connector under fretting ...

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