XT4 frame with Ekip LSI — selective distribution protection
The 1SDA068153R1 is an ABB XT4N 160 moulded-case circuit breaker with an Ekip LSI electronic trip unit, rated In 40 A continuous on a 160 A frame. The frame-to-trip ratio means the breaker carries 40 A without nuisance tripping while the larger frame provides short-circuit withstand and room for a future trip-unit swap if the load grows. Rated 690 V at 50/60 Hz, this 4-pole breaker suits TN-S or TN-C-S distribution panels where the neutral needs coordinated isolation and protection alongside the three phases.
Trip unit selectivity — LSI protection for panel coordination
The Ekip LSI trip unit provides adjustable long-time (L) overload, short-time (S) delay, and instantaneous (I) short-circuit protection. The S-delay allows the breaker to ride through downstream fault clearing, maintaining selectivity with branch MCCBs or fuses — critical for a distribution panel feeding multiple sub-panels or motor control centres.