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• Plug-in kit for Schneider Electric 4 pole Compact NSX 100/160/250 fixed Circuit Breaker. Plug-in configuration is done by adding a plug-in kit to the fixed Compact NSX device. This kit includes a plug-in base (LV 429267), 4 power connections (LV 429268), 2 short terminal shields (LV429516) and a safety trip Interlock (LV 429270). The plug-in configuration allows you to quickly and easily install or extract Circuit Breakers from the base. You can do this without connecting or disconnecting the power circuits. Plug-in mounting mode mercury-free