Choosing a moulded-case circuit breaker (MCCB) for industrial projects
Four criteria to check before ordering an MCCB, from rated current to breaking capacity.
Selecting the right moulded-case circuit breaker (MCCB) is the difference between a stable switchboard and costly production stops. When supplying equipment for large industry, the choice must be driven by project data, not price alone.
Rated current and diversity
The first step is establishing the load's rated current and the diversity factor of the connected consumers. The breaker must carry the continuous load current without overheating, while matching the downstream cable and busbar ratings.
Short-circuit breaking capacity
The breaking capacity (Icu/Ics) must exceed the prospective short-circuit current at the point of installation. Underestimating this parameter is the most common design error and can be catastrophic at the moment of a fault.
Protective coordination
Coordination between upstream and downstream breakers ensures that only the device nearest the fault trips, keeping the rest of the plant energised. This is vital for production continuity in industrial units.
Authenticity and support
- Sourced from an official seller or representative of the brand
- Specifications matched to the manufacturer's catalogue
- Availability of spare parts and technical support
Choosing the right device is half the work; the other half is supplying genuine goods with valid documentation. Our specialists support you through selection and quotation.