The largest project in moulded-case circuit-breakers.

ABB Isomax S moulded-case low-voltage circuit-breakers offer performance features that meet the full spectrum of application requirements, from small users through to large industrial electricity distribution installations.

Innovation, technology and quality have always been the principles guiding the development of ABB products.

Strengths that have reached outstanding levels in the Isomax S series, which now offers even more solutions to meet every need, making it the most complete range of moulded-case circuit-breakers.

The Isomax S series is rationally divided into eight basic models following a modular logic that converts them into different versions, creating a full spectrum of different ranges to provide an optimal dedicated response to any installation requirement.

This results in a wide choice of alternating current and direct current distribution circuit-breakers, current-limiting circuit-breakers, motor protection circuit-breakers, switch disconnectors and residual-current circuit-breakers.

In addition to all these ranges, which meet the IEC 947-2 and EN 60947-2 international standards, there are also motor protection automatic circuit-breakers and switch-disconnectors that comply with the UL489 and CSA C22.2 standards thanks to approval by the Underwriters Laboratories.

The complete system approach of the series can also be
seen in the modular nature of its components: the
dimensions, installation procedures and accessory options
are the same irrespective of the circuit-breaker range, with
significant benefits for the user.