Schneider Electric LUCB05BL DOL Starter 3 kW 690 V AC 3-Phase IP40

The Schneider Electric LUCB05BL is a high-performance TeSys U standard control unit designed for reliable Direct-On-Line (DOL) motor starting. Engineered for 3-phase motor applications, this unit integrates seamlessly into LUB12, LUB32, and LUB38 power bases to create a comprehensive starter controller. It is specifically optimized for motors with a power rating of up to 3 kW and operates efficiently at voltages up to 690 V AC, providing robust protection and control in demanding industrial environments.

Advantages

This control unit offers advanced motor protection features, including adjustable thermal overload protection with class 10 tripping, short-circuit protection, and phase loss detection. Its compact design, measuring only 45 mm in width, allows for space-saving installation within electrical cabinets. The unit is built to high quality standards, ensuring long-term operational reliability and equipment safety. Furthermore, it is Green Premium compliant, meeting strict environmental standards for RoHS and REACh, making it a sustainable choice for modern electrical infrastructure.

Suitable for

• Industrial 3-phase motor control systems
• Direct-On-Line starting applications
• Motor protection in automated machinery
• Electrical installations requiring compact control units

When it may not be suitable

This unit is not intended for use as a standalone device and must be installed within a compatible TeSys U power base to function. It is also not suitable for applications exceeding the specified current range of 1.25-5A or for non-motorized electrical loads that do not require the specific protection features provided by this controller.

Key specifications

• Rated current range: 1.25-5A (adjustable)
• Control voltage: 24V DC
• Maximum voltage: 690 V AC
• Power rating: 3 kW
• Ingress protection: IP40
• Dimensions: 45 mm (W) x 60 mm (D) x 66 mm (H)
• Tripping class: 10

How to use

To use the LUCB05BL, insert the control unit into a compatible TeSys U power base (LUB12, LUB32, or LUB38). Ensure the power base is properly mounted and wired according to the technical documentation. Connect the 24V DC control signal to the A1/A2 terminals located on the power base. Once installed, adjust the current setting dial to match the nominal current of your motor to ensure accurate overload protection. Always verify that all connections are secure before energizing the system.

What to consider before purchase

• Verify compatibility with your existing TeSys U power base
• Ensure the motor's nominal current falls within the 1.25-5A range
• Confirm the availability of a 24V DC control supply
• Check the environmental conditions to ensure IP40 protection is sufficient

Usage recommendations: Regularly inspect the control unit for signs of wear or loose connections during routine maintenance. Ensure that the current setting is correctly calibrated to the motor's nameplate data to prevent nuisance tripping or inadequate protection.