ABB 1SCA151058R1001 OXB630E3S3QT 630A 4P 42kA Automatic Transfer Switch

ABB 1SCA151058R1001, catalog code OXB630E3S3QT, is a 630 A TruONE automatic transfer switch built for 4-pole switching between utility and generator supply. The open-style unit runs on 200-480 V AC, uses a Level 3 LCD controller with a delayed I-O-II transition, holds a 42 kA (0.1 s) Icw rating, and has top-fed line terminals.

Technical Specifications

Certifications & Standards

• IEC 60947-6-1

Selection Notes

The switched fourth pole on this 630 A unit breaks the neutral together with the three phases, which TN-S or TT systems with multiple earth points typically need to avoid circulating neutral currents during transfer. The Level 3 controller adds a built-in LCD for on-device transfer-parameter setup and status readout, useful where a technician needs to confirm settings without a separate laptop or HMI. 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 lighter continuous-current duty, the 500 A frame in the same OXB TruONE range is the better fit where this 630 A unit would be oversized.