Air circuit breakers (ACB) from ABB, Siemens and Schneider Electric protect main incomers and bus ties from 630 A up to 6300 A. The range covers 3-pole and 4-pole fixed and draw-out breakers with electronic trip units, plus accessories and releases, with more than 750 products. Stoklink ships worldwide from Turkey and quotes project volumes on request.
What's in this range
How to choose
- Rated current of the frame, matched to the transformer or incomer load.
- Breaking capacity (Icu) at the system voltage, above the prospective short-circuit current.
- Fixed or draw-out version: draw-out allows maintenance without opening the busbar.
- Trip unit: Ekip or ETU, with LI, LSI or LSIG protection functions for selectivity.
- Poles: 3P or 4P according to the neutral arrangement. Standard: IEC 60947-2.
FAQ
When is an ACB needed instead of an MCCB?
Typically for main incomers and bus ties above 1000 A to 1600 A, and where selectivity and draw-out maintenance matter.
What does LSI mean on an ACB trip unit?
LSI stands for long-time, short-time and instantaneous protection, which allows time-based selectivity between breakers.
Do you ship air circuit breakers worldwide?
Stoklink ships worldwide from Turkey on EXW terms. Lead time depends on distributor stock, so request a quote with your part numbers and quantities.
