The ABB RC Sel x XT5 4p is an RC Sel residual current release for the Tmax XT5 moulded-case circuit breaker. It is an accessory, not a standalone device: it mounts onto the breaker and adds earth-fault protection to the breaker's existing overcurrent release, so an installed XT5 can be given residual current protection without replacing the breaker or altering the busbar work. This version is for 4-pole breakers. It is the selective (RC Sel) type, which trips with a set time delay so that a residual current device downstream clears the fault first and only the faulty circuit is lost — the behaviour wanted at the incomer of a distribution board. The CE declaration for the assembly is the one belonging to the circuit breaker it is fitted to. Supplied by cBallast on quote-to-invoice terms; lead time and freight are quoted per RFQ against the destination Incoterm.