ABB 1SCA153519R1001 OXB400E3S4QT 400A 4P Level 4 Touch Automatic Transfer Switch

Switching two independent AC sources at 400 A, the ABB 1SCA153519R1001 (OXB400E3S4QT) is a four-pole TruONE automatic transfer switch rated 200 to 480 V AC with a Level 4 touchscreen controller for the delayed I-O-II sequence. The top-supply / bottom-load terminal arrangement fits switchboards fed from an overhead riser.

Technical Specifications

Certifications & Standards

• IEC 60947-6-1

Selection Notes

This 400 A frame carries Icw of 25 kA for 0.3 s and Uimp of 12 kV, above the 250 A chassis, worth weighing against upstream fault levels before specifying the lighter frame. The 4P configuration switches the neutral with the phases, needed where the two sources must not share a bonded neutral during transfer. As the Level 4 touch unit, it offers the fullest local HMI of the three controller tiers on this 400 A S-series frame, ahead of the DIP-switch and LCD-display options. QT terminals bring supply in from the top and send load out the bottom, the reverse of the QB layout, for cabling that drops from above.