ABB 1SCA151424R1001 OTM63F3C21D400C 3P 2.5 kA Icw Automatic Transfer Switch

The ABB 1SCA151424R1001 OTM63F3C21D400C is a self-supplied automatic transfer switch rated 63 A at 3 poles for 380-415 V AC mains-generator changeover. Its type 21D control module has adjustable operating parameters, letting switching delays and voltage thresholds be tuned to the installation instead of fixed at the factory. It withstands 2.5 kA for 1 s and mounts on a DIN rail or base.

Technical Specifications

Selection Notes

The 21D controller gives the 1SCA151424R1001 field-tunable switching delay and voltage thresholds at 63 A, 3-pole - useful where the standby generator's run-up time or the acceptable voltage window differs from ABB's factory default. Against the fixed-parameter 20D unit in the same frame it adds about 0.1 kg and a configuration step during commissioning in exchange for that flexibility. Where neutral also needs switching at this current and control level, the 4-pole 21D unit is the direct equivalent.