Kanlux KMCCB-RT-250A Molded Case Circuit Breaker, 3-Pole, Adjustable Thermal Release, 36kA Ics, 50kA Icu

The Kanlux KMCCB-RT-250A is a high-performance 3-pole molded case circuit breaker (MCCB) engineered to provide dependable protection for electrical distribution systems. This device is specifically designed to safeguard industrial and commercial circuits against overloads and short-circuit faults, ensuring operational continuity and safety. With its robust construction and precise engineering, it serves as a critical component in power management infrastructure.

Advantages

The primary advantage of this circuit breaker is its adjustable thermal release mechanism, which allows for precise current settings tailored to specific application requirements. This flexibility ensures optimal protection for various types of electrical loads. Furthermore, the device offers high breaking capacities, with an Ics of 36kA at 380/415V AC and an Icu of 50kA at 220/230V AC, providing reliable performance under demanding electrical conditions. Its 3-pole configuration makes it ideal for standard three-phase power distribution networks.

Suitable for

• Industrial power distribution panels
• Commercial building electrical systems
• Protection of motors and heavy machinery
• Main power supply lines in manufacturing facilities

When it may not be suitable

This device is not intended for use in environments with high moisture or dust levels, as it carries an IP20 protection rating, meaning it lacks protection against water ingress and requires installation within a suitable enclosure. It is also not designed for single-phase residential circuits where a 250A rating would be excessive.

Key specifications

• Number of poles: 3
• Rated current: 250A
• Service short-circuit breaking capacity (Ics): 36kA at 380/415V AC
• Ultimate short-circuit breaking capacity (Icu): 50kA at 220/230V AC
• Protection rating: IP20
• Release type: Adjustable thermal

How to use

The Kanlux KMCCB-RT-250A should be installed by a qualified electrician within a distribution board or electrical cabinet. Ensure that the power supply is disconnected before installation. Mount the device securely onto the mounting plate or DIN rail as specified by the enclosure design. Connect the input and output cables according to the required torque settings to prevent overheating. Once installed, adjust the thermal release settings to match the specific load requirements of the circuit being protected.

What to consider before purchase

• Verify that the 250A rated current matches your circuit load requirements.
• Ensure the installation environment is dry and protected, suitable for IP20 equipment.
• Confirm that the available space in your distribution board accommodates the physical dimensions of a 3-pole MCCB.
• Check that the short-circuit capacity ratings meet the calculated fault levels of your electrical system.

Usage recommendations

Regularly inspect the circuit breaker for signs of wear or thermal damage. It is recommended to perform periodic testing of the tripping mechanism to ensure the device remains functional and capable of providing the necessary protection during a fault event.