Schneider Electric LUCA32BL

Technical Specifications & Application Guide

1. Product Overview

Schneider LUCA32BL is a standard control unit from the TeSys Ultra series (formerly TeSys U series), a component of three-phase motor starters. It must be used with LUB series power bases (such as LUB32 / LUB38) to form a complete motor starting and protection system. It features thermal-magnetic protection and is suitable for industrial applications requiring basic motor protection including overload, short-circuit, phase loss, phase imbalance, and earth fault protection.

2. Core Technical Parameters

3. Features
4. Comprehensive Protection: Overload, short-circuit, phase loss, phase imbalance, and earth fault protection
5. Manual Reset: Enables quick restart after fault clearance
6. Modbus Communication: Supports configuration and data transfer for remote monitoring and diagnostics
7. Flexible Mounting: Compatible with various TeSys Ultra power bases
8. High Compatibility: Suitable for utilization categories AC-41 / AC-43 / AC-44
9. Compact Design: Saves cabinet space and increases mounting density
10. Applications

– General machinery including fans, pumps, and compressors

– Industrial line equipment such as conveyors and mixers

– Small factory automation systems

– Applications requiring basic motor protection with 24 VDC control signals

– Replacement for traditional thermal relay + contactor combinations, offering more reliable protection and easier installation

5. Operating Instructions
6. Installation Requirement: Must be used with a matching LUB series power base with correct electrical connections
7. Wiring Rules: Stable 24 VDC supply for control circuit; three-phase power for main circuit
8. Setting Recommendation: Adjust overload setting according to motor rated current within 8 A–32 A
9. Maintenance Note: Regularly check control unit status to ensure proper protection operation
10. Communication Setup: Configure Modbus parameters per manual if communication is required
11. Compatibility Information

Compatible Power Bases: TeSys Ultra series including LUB32 (32 A), LUB38 (38 A)

Replacement: Can replace some traditional thermal relay + contactor assemblies with an integrated solution

Upgrade Path: For advanced functions such as built-in soft starting and energy monitoring, consider TeSys T or TeSys Giga series

The Schneider LUCA32BL is a cost-effective standard motor control unit. With its compact design, comprehensive protection, and wide compatibility, it is an ideal choice for starting and protecting three-phase motors in industrial automation, especially for cost-sensitive applications requiring basic protection.

TeSys Ultra (formerly TeSys U) Standard Control Unit Range & Power Bases

1. Complete List of Standard Control Units (LUCA Series)

TeSys Ultra standard control units use thermal-magnetic protection and provide overload, short-circuit, phase loss, phase imbalance, and earth fault protection. They are only compatible with standard power bases (LUB series) and not with advanced bases (LUBxxx0 series). All models are Class 10, 3-pole (3P) three-phase devices.

Model Naming Convention

LUC: Prefix for TeSys Ultra control units

A: Standard control unit (Advanced versions: C/D/M)

XX: Current range code (1X = 0.35–1.4 A, 05 = 1.25–5 A, 12 = 3–12 A, 18 = 4.5–18 A, 32 = 8–32 A)

Suffix: BL = 24 VDC, ES = 48–72 V AC/DC, FU = 110–240 V AC/DC, B = 24 VAC

2. Complete List of Power Bases (LUB Series)

TeSys Ultra power bases are divided into standard bases (no suffix) and advanced bases (suffix 0), both 3P three-phase, for different control unit types.

2.1 Standard Power Bases (For LUCA Series Standard Control Units)

2.2 Advanced Power Bases (For LUCC / LUCD / LUCM Advanced Control Units)

2.3 Reversing Power Bases (For Reversing Control Units)

3. Key Matching Rules
4. Standard Control Unit (LUCA) + Standard Base (LUBxx): Basic motor protection with thermal-magnetic protection and standard control
5. Advanced Control Unit (LUCC/LUCD/LUCM) + Advanced Base (LUBxx0): Premium protection with diagnostics, communication, and extended functions
6. Control unit current range ≤ base rated current: e.g., LUCA32BL (8–32 A) may only be used with LUB32 (32 A) or LUB38 (38 A), not LUB12 (12 A)
7. Control voltage is independent of main voltage: Control unit powered via terminals A1/A2 on the base, typically 24 VDC/AC, 48–72 V AC/DC, or 110–240 V AC/DC
8. Application Notes
9. Mounting: Control unit plugs directly into power base and locks with a clip; no additional tools required
10. Protection: Basic protection including Class 10 overload, short-circuit (13 × Ir max), phase imbalance, phase loss, and earth fault (equipment protection)
11. Communication: Supports Modbus (with optional communication module) for remote monitoring and diagnostics
12. Environment: Operating temperature -25 °C ~ +70 °C, suitable for most industrial environments

The combination of TeSys Ultra standard control units (LUCA series) and power bases (LUB series) provides a flexible and reliable solution for motor starting and protection, covering three-phase motors from 0.75 kW to 18.5 kW. Selection should be based on motor rated current, control voltage, and protection requirements to ensure safe and stable operation.