Legrand M 250 Motor Circuit Breaker 3P 9kW 14-20A 1NO/1NC

The Legrand M 250 motor circuit breaker is a high-performance 3-pole protection device engineered to safeguard electric motors with power ratings up to 9kW. This unit provides precise control and reliable protection against electrical faults, ensuring the longevity and operational stability of connected machinery in demanding industrial and commercial environments.

Advantages

This motor circuit breaker offers exceptional reliability by combining thermal and magnetic protection in a single compact housing. Its adjustable thermal release range allows for fine-tuned calibration to match the specific current requirements of the motor, effectively preventing damage from overloads. The inclusion of integrated auxiliary contacts provides essential feedback for monitoring and control systems, enhancing the overall safety and automation capabilities of the electrical installation.

Suitable for

• Industrial motor control centers
• Commercial HVAC systems
• Conveyor belt motor protection
• Pump and compressor control panels

This device is not suitable for applications requiring protection for motors exceeding 9kW or for systems operating outside the specified 14-20A current range. It is also not intended for use in environments with extreme moisture or corrosive gases unless housed in an appropriate protective enclosure.

Key specifications

• Number of poles: 3
• Power rating: up to 9kW
• Current adjustment range: 14-20A
• Auxiliary contacts: 1NO / 1NC
• Protection type: Thermal and magnetic

Installation should be performed by a qualified electrician in accordance with local electrical codes. The device is typically mounted on a standard DIN rail within a distribution board or control cabinet. Once mounted, the thermal release dial should be set to the nominal current value specified on the motor nameplate to ensure accurate protection.

What to consider before purchase

• Verify the nominal current of your motor falls within the 14-20A range
• Ensure the power rating does not exceed 9kW
• Check available space in your control cabinet for DIN rail mounting
• Confirm the compatibility of the auxiliary contacts with your control circuit voltage

For optimal performance, regularly inspect the terminal connections for tightness and ensure the device is free from dust accumulation. Periodically test the trip mechanism to verify the continued functionality of the protection system.