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LUCA05BL is a standard control unit of Schneider’s TeSys U series, suitable for three-phase motors. It features an adjustable rated current of 1.25–5A, a control voltage of 24V DC, and a Class 10 thermal overload rating. Equipped with protection against overload, court-circuit, phase loss, phase interruption, and ground fault, it is designed for direct-on-line starting control of motors below 1.5kW (400V).
| Paramètre | Valeur | Description |
| Compatible Series | TeSys U | Standard control unit (LUCA series) |
| Courant nominal (Ir) | 1.25–5A | Réglable; rated continuous current (Iu)=5A |
| Tension de contrôle | 24À DC | Operating voltage of the control circuit |
| Thermal Overload Class | Class 10 | Complies with IEC 60947-4-1 |
| Main Circuit Voltage | ≤690V AC | Suitable for three-phase motors |
| Motor Power (400V) | ≤1.5kW | Triphasé, 50/60HZ |
| Protection contre les courts-circuits | 65UN (instantaneous) | Non-adjustable |
| Fonctions de protection | Overload/Short Circuit/Phase Loss/Current Unbalance/Ground Fault | Manual reset required |
| Dimensions (L×H×P) | 45×66×60mm | Standard modular installation |
| Place of Origin | France | Original imported product |
Product Positioning & Applications
– As a standard control unit of the TeSys U series, it combines with compatible power bases (par ex., LUB05) to form a direct-on-line starter, providing basic control and protection for three-phase motors.
Scénarios d'application: Light to medium-load working conditions such as pumps, les fans, compresseurs, and small conveyor lines, suitable for industries including textile, papermaking, chemical engineering, and food & beverage.
Differentiation from Series Peers: Unlike LUCB (advanced type with alarm/test functions) and LUCC (communication type), LUCA only provides basic protection with a lower cost.
Selection & Replacement
Compatible Bases: LUB05, LUB05BL, etc.. The base must match the rated current of the control unit.
Replacement References: Equivalent models from Chint NJR2 series and ABB MS116 series. Cependant, interface and protection logic differences exist; it is necessary to verify installation dimensions and control circuit parameters.
Installation & Directives d'entretien
- Install via DIN rail or screw mounting; modular plug-and-play design enables quick replacement.
- The control circuit requires an external 24V DC power supply. Set Ir (1.25–5A) on the main circuit according to the motor’s rated current.
- Manual reset is required after a fault. Ground fault protection is only for equipment and does not replace personal safety protection.
- Operating temperature range: -25～+60℃. Avoid dusty, humide, and corrosive environments; regularly check wiring and terminal tightness.
Procurement & Supply
Common Channels: Schneider authorized distributors, industrial e-commerce platforms. Reference price: approximately €60–100 (tax included). In-stock delivery typically takes 2–5 working days.
Compatible Accessories: Can be paired with LUFDA local alarm module and LULC remote signal module to expand status monitoring functions.
Detailed Comparison Between Schneider TeSys U Series LUCA05BL and LUCB05BL
| Comparison Dimension | LUCA05BL (Modèle standard) | LUCB05BL (Advanced Type) |
| Core Positioning | Basic motor protection & direct-on-line starting control | Enhanced protection + fault alarm + test functions |
| Rated Current Range | 1.25–5A | 1.25–5A |
| Tension de contrôle | 24À DC | 24À DC |
| Thermal Overload Class | Class 10 (CEI 60947-4-1) | Class 10 (CEI 60947-4-1) |
| Compatible Motor Power (400V) | ≤1.5kW | ≤1.5kW |
| Main Circuit Voltage | ≤690V AC | ≤690V AC |
| Basic Protection Functions | Surcharge, court-circuit, phase loss, current unbalance, ground fault | Same as LUCA05BL, plus overload pre-alarm function |
| Special Features | Manual reset only; no alarm/test functions | 1. Fault alarm output: Relay contact signal, connectable to indicator lights or PLC |
| 2. Manual test function: Simulate faults without power supply to verify protection logic | ||
| 3. Indication d'état: Multi-color LED distinguishes running/overload/short circuit/phase loss status | ||
| Méthode de réinitialisation | Manual reset only | Réinitialisation manuelle + external remote reset signal support (accessories required) |
| Modular Accessory Compatibility | Supports basic bases only (par ex., LUB05) | Compatible with LUFDA local alarm module and LULC remote signal module; supports expansion |
| Méthode d'installation | DIN rail/screw mounting; plug-and-play | Same as LUCA05BL; consistent installation dimensions |
| Scénarios d'application | Light/medium-load conditions without remote monitoring needs (par ex., small pumps, les fans) | Scenarios requiring fault pre-alarm and status monitoring (par ex., automated production lines, chemical equipment) |
| Cost Reference | €60–100 (tax included) | €120–180 (tax included), approximately twice the price of LUCA05BL |
| Replacement Compatibility | Base-compatible with LUCB05BL; direct plug-and-replace | Downward compatible with LUCA05BL replacement; redundant functions but higher cost |
Key Difference Summary
- Functional Differences: The core advantages of LUCB05BL are overload pre-alarm + fault alarm + manual test, which can detect motor overload trends in advance to avoid downtime losses. In contrast, LUCA05BL only provides post-fault protection with no pre-alarm capability.
- Expansion Capability: LUCB05BL can be connected to external alarm lights, Automates, or remote monitoring modules to adapt to automated systems; LUCA05BL has no expansion interface and only meets basic control needs.
- Cost & Cost-Effectiveness: LUCA05BL is suitable for cost-sensitive scenarios with simple working conditions; LUCB05BL is ideal for industrial scenarios requiring high reliability. Although it has a higher price, it can reduce fault troubleshooting time and maintenance costs.
Recommandations de sélection
– If end customers only require “basic motor protection against damage”, prioritize LUCA05BL for higher cost-effectiveness.
– If customers operate in scenarios such as automated factories and production lines that require fault pre-alarm and remote monitoring, recommend LUCB05BL to improve equipment operation rate.
Cross-Brand Selection Comparison Table: Schneider LUCA05BL/LUCB05BL vs. Chint NJR2-5 vs. ABB MS116-5
| Comparison Dimension | Schneider LUCA05BL | Schneider LUCB05BL | Chint NJR2-5 | ABB MS116-5 |
| Product Series Positioning | TeSys U standard control unit | TeSys U advanced control unit | NJR2 series thermal overload relay | MS116 series motor starter protection circuit breaker |
| Rated Current Range | 1.25–5A (réglable) | 1.25–5A (réglable) | 1.6–5A (réglable) | 1.6–5A (réglable) |
| Tension de contrôle | 24À DC | 24À DC | No control circuit (passive) | No control circuit (passive) |
| Thermal Overload Class | Class 10 | Class 10 | Class 10 | Class 10 |
| Compatible Motor Power (400V) | ≤1.5kW | ≤1.5kW | ≤1.5kW | ≤1.5kW |
| Main Circuit Voltage | ≤690V AC | ≤690V AC | ≤660V AC | ≤690V AC |
| Fonctions de protection de base | Overload/Short Circuit/Phase Loss/Current Unbalance/Ground Fault | Overload+Short Circuit+Phase Loss+Current Unbalance+Ground Fault | Surcharge, Phase Interruption, Current Unbalance | Surcharge, Short Circuit, Phase Loss, Current Unbalance |
| Overload Pre-Alarm, Fault Alarm Output | No short circuit/ground fault protection | No ground fault protection | ||
| Special Features | Réinitialisation manuelle | Manual/remote reset | Manual/automatic reset option | Knob-type current adjustment |
| Modular plug-and-play | Fault alarm contact | Taille compacte, low cost | Integrated circuit breaker function | |
| Manual test function | Manual closing/opening operation | |||
| Accessory expansion support | ||||
| Méthode d'installation | DIN rail/screw mounting | DIN rail/screw mounting | DIN rail mounting | DIN rail mounting |
| Requires TeSys U base (par ex., LUB05) | Compatible with full range of TeSys U bases | Direct combination with contactors | Integrated design, no base required | |
| Scénarios d'application | Light-load conditions, cost-sensitive scenarios | Automated production lines, fault pre-alarm required scenarios | Domestic industrial supporting, low-end equipment supporting | Mid-to-high-end industrial scenarios requiring integrated circuit breaker functions |
| Small pumps/fans | Chemical/textile equipment | Distribution boxes/pumps & les fans | Production lines/compressors | |
| Cost Reference (Tax Included) | €60–100 | €120–180 | RMB 80–150 | €90–160 |
| Replacement Compatibility | Base-compatible with TeSys U | Base-compatible with LUCA05BL | Simple wiring; cross-brand replacement of international models requires mounting hole adjustment | Integrated design; cross-brand replacement requires main circuit wiring matching |
| Cross-brand replacement requires wiring modification | Direct replacement for LUCA05BL |
Key Selection Conclusions
- Chint for Cost Priority: NJR2-5 has the lowest price, suitable for domestic low-end equipment supporting, but lacks short circuit and ground fault protection and needs to be used with additional circuit breakers.
- ABB for Integrated Control: MS116-5 is an integrated protection circuit breaker with built-in closing/opening functions, requiring no base matching, suitable for scenarios with high integration requirements.
- Schneider LUCB for Automated Scenarios: Equipped with alarm and test functions, it can be connected to PLCs for remote monitoring, reducing fault troubleshooting time, ideal for high-end production lines.
- Schneider LUCA for Basic Protection: Balanced functions with a lower price than LUCB and ABB, suitable for overseas small and medium-sized customers without monitoring needs.
Export Adaptation Tips (For Markets Such as Algeria)
– Both Schneider and ABB products are certified by IEC and CE, directly meeting the import certification requirements of African countries such as Algeria.
– Chint NJR2-5 requires additional local access documents such as SASO certification. Some channels can handle the certification on behalf of customers, with a cost increase of approximately 10%–15%.
