Air Circuit Breakers (ACB)

722 parts 1 sub-family 3 series

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.

422 parts

Showing 145–192
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Guide

Air Circuit Breakers (ACB) buying guide

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

Air Circuit Breakers (ACB) questions

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.

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