ABB-FlexLine® phase rails enable safe and economical cross-wiring of circuit breakers, residual current devices and other modular ABB-FlexLine® installation devices. The FlexLine® phase rails can be used regardless of the selection of installation devices and their arrangement. 1-phase + N and 3-phase + N types are available in various module widths. To select the correct phase rail, you only need to pay attention to whether the application is 1-phase or 3-phase. FlexLine® phase rails speed up installation and save up to 50% time thanks to our push-in technology without screwdrivers or other tools.