Circuit-breakers, to protect lines up to 630 amps
Compact circuit breakers (up to 630A) are essential solutions for protecting electrical circuits in large-scale installations with high current demand. Their efficiency, robustness, and ease of installation make them an ideal choice for industries, commercial spaces, and building installations, providing secure protection against electrical failures. Additionally, the variety of types and functions of these circuit breakers allows them to be applied in different scenarios, ensuring the safety and continuity of power supply.
Moulded Case Circuit Breakers (MCCBs) up to 630A
Moulded case circuit breakers (MCCBs) up to 630A are essential solutions for protecting electrical circuits in large-scale installations and high-current applications. Their efficiency, robustness and ease of installation make them an ideal choice for industrial, commercial and building installations, providing reliable protection against electrical faults. In addition, the wide range of types and functions available allows these circuit breakers to be used in different applications, ensuring safety and continuity of power supply.
High-Performance Protection for Electrical Panels
MCCBs are designed to withstand high short-circuit currents, ensuring that a fault in one branch does not compromise the entire infrastructure. Thanks to their moulded case construction, they provide superior insulation and mechanical durability suitable for frequent switching operations.
Key features of our range:
- Precise Adjustment: Adjustable thermal and magnetic trip units for enhanced selectivity.
- Versatility: Available in three-pole (3P) and four-pole (4P) versions.
- Safety: High breaking capacity (kA) suitable for transformer substations and main electrical panels.
Applications of Moulded Case Circuit Breakers
Given their versatility and current ratings of up to 630A, these devices are the ideal choice for:
- Protection of incoming feeders in main low-voltage switchboards (LVMDPs).
- Switching and protection of high-power electric motors.
- Installations in industrial environments with demanding thermal conditions.
- Critical power systems where fast tripping is essential.
Why Choose Henvi for Your Switching Protection?
At Henvi, we provide more than just components; we offer technical support to help you choose the MCCB with the appropriate tripping characteristics and breaking capacity for your project. With stock availability and fast delivery, we are a strategic partner for installers who cannot afford unplanned downtime on their projects.
Frequently Asked Questions About MCCB Circuit Breakers
What is the difference between a modular circuit breaker and an MCCB?
The main difference lies in current capacity and robustness. While modular circuit breakers are used for final circuits (generally up to 125A), moulded case circuit breakers (MCCBs) support much higher currents (up to 630A at Henvi) and allow tripping parameters to be adjusted, providing greater precision in industrial environments.
What does adjustability mean in an MCCB?
Many MCCBs allow the rated current limit (Ir) to be adjusted. This means that a 250A circuit breaker can, for example, be set to trip at 200A, allowing the protection to be adapted to the actual installed load without replacing the equipment.
How do I choose the breaking capacity (kA) for a circuit breaker up to 630A?
The breaking capacity must be higher than the prospective short-circuit current at the installation point. In electrical panels located close to transformer substations, MCCBs with breaking capacities of 36kA, 50kA or higher are commonly required.
Can these circuit breakers be used with accessories?
Yes. Our range of MCCBs is compatible with various accessories, including auxiliary signalling contacts, shunt trip coils and motorised operators for electrical panel automation.
