ABB 1SCA151746R1001 OXB500E3X4QT 500A 3P 42kA Automatic Transfer Switch

The ABB 1SCA151746R1001 is a 500 A, 3-pole TruONE automatic transfer switch (catalog designation OXB500E3X4QT) built for switching between two independent power sources. It operates on a 200-480 V AC supply, carries a Level 4 Touch controller, and withstands 42 kA for 0.1 s (Icw). The open-style unit uses a delayed I-O-II transition and top-fed line terminals.

Technical Specifications

Certifications & Standards

• IEC 60947-6-1

Selection Notes

The 3-pole configuration switches only the phase conductors and leaves the neutral solid, which fits three-wire distribution or installations where the neutral is bonded elsewhere and does not need to follow the transfer; pick the 4-pole (S) version instead when the system requires the neutral to open with the phases. The Level 4 controller adds a touchscreen for on-device commissioning, event logging and diagnostics, useful on sites where a dedicated screen replaces laptop-based setup tools. Top-fed line terminals (QT) suit panels wired with incoming supply above the switch; pick the QB variant instead when busbars feed in from below. For higher continuous-current duty, the 630 A frame in the same OXB TruONE range covers loads this 500 A unit does not.