Beckwith M-0145 First Customer Protector Device

Beckwith M-0145 First Customer Protector is a compact, single-phase, solid-state protection device that forms part of Beckwith Electric’s transformer-control protection family. Designed to be used with Beckwith’s M-0329B LTC control backup relay, the M-0145 provides the dedicated first-customer protection function within a time-delayed protection scheme. The device’s time-delay capability helps coordinate protective actions with the LTC system, reducing nuisance trips during transient events while safeguarding the primary equipment and the customer at the outset of the feeder. In typical distribution applications, it accompanies LTC-based transformer controls to restrain voltage excursions and support reliable protection coordination for the first customer on a feeder. The M-0145 is specified as a single-phase, solid-state protection module that can be integrated into Beckwith’s protection architecture, delivering fast, deterministic response within the overall protection strategy. Its compact form factor supports straightforward cabinet mounting and seamless integration with Beckwith’s standard interfaces, simplifying retrofits and new installations alike.