Circuit Breakers
● ComPacT molded case circuit breakers (MCCB) ComPacT for cable and machine protection from 100A to 3200A.
● MasterPact air circuit breakers (ACB) for the protection of low-voltage lines up to 6300A.
● Disconnectors and main switches, MasterPact, ComPact and FuPact for manual or remote-controlled switching of low-voltage lines up to 6300A.
● TransferPact automatic and manual transfer switches to change from main to backup power sources.
The Electrical Installation Wiki is your best reference at each step of setting up a power distribution and supply system, in full compliance with the standards in force in your Country, with:
● Basic functions of LV switching devices.
● Position and selection of switching devices.
● Circuit breaker (including standards and description).
Square D™ QO™ 2-Pole HF-rated GFCI circuit breaker
Plug-on neutral up to 60 A for a cleaner panel and faster install.
• Space-saving ComPacT NSXm, rated up to 160A, with breaking capacity up to 70 kA (under 400 V).
• Digital-enabled ComPacT NSX, rated up to 630 A of cables, but also motors, generators, and other special applications, with breaking capacity up to 200 kA.
• Digital-enabled ComPacT NS protects lines and loads up to 3200 A, with a breaking capacity of up to 150 kA.
• Special versions for DC-supplied networks up to 1500 V, or AC-supplied up to 690 V.
With ComPacT, you benefit from 65 years of technological leadership of top-level performances (discrimination, short-circuit current limitation, cascading). You also rely on quality proven worldwide in the harshest operating conditions. The newest generation features increased digital capabilities, integration in EcoStruxure Power connected architectures, innovative fire protection options, and other user conveniences. Designed and manufactured with sustainability in mind, ComPacT switchgear optimizes your energy consumption and equipment maintenance.
What is a circuit breaker
Circuit breakers are the guardians of your electrical system.
An air circuit breaker (ACB) uses atmospheric air to extinguish the arc when interrupting current, serving as a main or tie breaker in switchboards from 800 A to 6000 A. MasterPacT™ MTZ and NT/NW ranges (UL/ANSI certified) from Schneider Electric protect against overload, short circuit, and ground fault, with Micrologic™ trip units adding metering.
A DC circuit breaker protects direct-current systems - battery banks, UPS, solar, EV charging - from overload and short circuits, using arc-quenching designs suited to DC's lack of a current zero-crossing. Schneider Electric offers the PowerPacT™ 500 Vdc breaker (UL Supplement SC) and Dual Rated AC/DC breakers for mixed-use systems.
PowerPacT Molded Case Circuit Breakers
Reduce downtime with the new PowerPacT molded case circuit breakers, featuring the industry's first LED Visi-Trip™ trip locator. Sign up to get notified when they are available.
• Designed for all panel builders who need a complete switchgear assortment.
• To save time and costs while maintaining smooth and efficient operation.
EasyPact circuit breakers and switches are part of the Easy Series, tailored for competitive projects where time and cost efficiency are key.
