Eaton 3-Pole Motor Protection Circuit Breaker 16-20A, 9kW

The Eaton 3-Pole Motor Protection Circuit Breaker is a robust electrical component engineered to provide reliable control and comprehensive protection for electric motors. Designed to handle a current range of 16-20A and a power rating of 9kW, this device serves as a critical safeguard against electrical faults in industrial and commercial environments. Its compact design allows for efficient integration into control panels, ensuring that motor-driven systems operate safely and maintain long-term performance.

Advantages

This motor protection circuit breaker offers high-precision thermal release, which allows for accurate adjustment to the specific requirements of the connected motor. By providing both overload and short-circuit protection in a single, integrated unit, it simplifies the electrical circuit design and reduces the need for additional protective components. The durable construction ensures consistent operation under demanding conditions, contributing to the overall reliability and longevity of the machinery it protects.

Suitable for

• Industrial motor control systems
• Commercial HVAC equipment
• Pumping stations and water management systems
• Conveyor belt drives and manufacturing machinery
• Compressor motor protection

When it may not be suitable

This device is not intended for use in circuits exceeding its specified current range of 16-20A or power rating of 9kW. It is also not suitable for applications requiring specialized protection features beyond standard thermal overload and short-circuit capabilities, such as advanced electronic motor management or soft-start functionality.

Key specifications

• Number of poles: 3
• Current adjustment range: 16-20A
• Power rating: 9kW
• Protection type: Thermal overload and short-circuit
• Mounting type: DIN rail or screw mounting

How to use

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 an electrical enclosure. Once mounted, the motor supply cables are connected to the input and output terminals. The thermal release current should be adjusted using the integrated dial to match the nominal current rating of the motor being protected. After installation, the breaker can be manually switched on or off using the front-facing toggle.

What to consider before purchase

• Verify that the motor's nominal current falls within the 16-20A range.
• Ensure the power rating of 9kW is compatible with your specific application.
• Check the available space in your control cabinet for proper ventilation and mounting.
• Confirm compatibility with existing electrical distribution systems.

Usage recommendations

Regularly inspect the circuit breaker for signs of wear or thermal damage. Periodically test the manual switching mechanism to ensure smooth operation, and verify that the current settings remain correctly calibrated to the motor's operational requirements.