Schneider Electric LUCA18BL Standard Control Unit 4.5-18A 24V DC

The Schneider Electric LUCA18BL is a standard control unit engineered for seamless integration with TeSys Ultra motor starters. This component serves as a critical element in industrial automation and power distribution, offering precise motor protection and control within a compact design. It is specifically calibrated to handle current ranges from 4.5 to 18A, ensuring that connected motors operate within safe parameters while maintaining high efficiency in demanding electrical environments.

Advantages

This control unit provides robust protection for electric motors by utilizing a Class 10 tripping characteristic, which balances rapid response to faults with the ability to handle standard motor start-up currents. Its design simplifies the assembly of motor starter systems, reducing the need for complex wiring and saving valuable space in control cabinets. The 24V DC control circuit compatibility makes it an ideal choice for modern automated systems that require reliable, low-voltage signaling for motor management.

Suitable for

• Industrial motor control systems
• Automation and process control applications
• Power distribution panels
• Protection of three-phase electric motors

When it may not be suitable

This unit is not intended for applications requiring control voltages other than 24V DC. It is also not suitable for motors operating outside the specified 4.5 to 18A current range or for environments where specialized protection classes beyond Class 10 are mandated by specific safety standards.

Key specifications

• Current adjustment range: 4.5 to 18A
• Control circuit voltage: 24V DC
• Tripping class: Class 10
• Compatibility: TeSys Ultra motor starters

How to use

To install the LUCA18BL, ensure the TeSys Ultra base unit is de-energized. Insert the control unit into the designated slot on the motor starter base until it clicks into place. Once installed, use the adjustment dial on the front of the unit to set the current limit according to the specific requirements of the connected motor. After configuration, verify all connections and ensure the 24V DC control supply is correctly wired to the terminals before energizing the system.

What to consider before purchase

• Verify that the motor full-load current falls within the 4.5-18A range.
• Ensure your control system provides a stable 24V DC supply.
• Confirm compatibility with your existing TeSys Ultra base unit.

Usage recommendations

Regularly inspect the control unit for signs of wear or environmental damage. Ensure that the current setting is periodically verified during maintenance cycles to match the motor's operational needs.