ABB 1SCA153516R1001 OXB400E3S2QT 400A 4P Level 2 DIP Automatic Transfer Switch

ABB's 1SCA153516R1001 (OXB400E3S2QT) switches 400 A loads across four poles within the TruONE automatic transfer switch range, covering source voltages from 200 to 480 V AC. Its Level 2 DIP-switch controller sets the delayed I-O-II transfer logic, and the top-supply / bottom-load terminal arrangement fits switchboards fed from overhead busbars.

Technical Specifications

Certifications & Standards

• IEC 60947-6-1

Selection Notes

On the 400 A frame, Icw rises to 25 kA for 0.3 s and Uimp to 12 kV compared with the 250 A chassis, extra margin worth weighing against the smaller frame when upstream fault levels are high. Switching the neutral along with the three phases, this 4P unit suits TN-S or TT systems that must not bridge neutrals between sources during transfer. The DIP-switch controller is the simplest of the three tiers on this 400 A S-series frame, setting transfer parameters without a display. QT terminals bring supply in from the top and send load out the bottom, the reverse of the QB unit, for cabling that drops from an overhead riser.