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Schneider LRD332 | TeSys LRD thermal overload relays – 23…32 A – class 10A
The Schneider LRD332 is a robust thermal overload relay specifically designed for motor protection. Part of Schneider Electric’s acclaimed TeSys range, this relay provides excellent protection against overloads, overheating, and phase failures, ensuring reliable and efficient motor operation in diverse applications.
Key Features
- Current Adjustment Range:
- Adjustable between 5.5 to 8A, making it ideal for smaller motors.
- Trip Class:
- Supports Class 10A, enabling quick and effective overload protection.
- Integrated Motor Protection:
- Guards against overheating, phase imbalance, and phase loss.
- Reset Mechanism:
- Dual options for manual or automatic reset, offering operational flexibility.
- Compact and Modular Design:
- Easily integrates with TeSys D contactors, providing a compact motor control solution.
- User-Friendly Controls:
- Equipped with built-in test and stop buttons for ease of maintenance and operation.
Applications
The LRD332 is ideal for motor protection in:
- Industrial Machinery:
Ensures safe operation of motors in small conveyors, packaging machines, and production lines. - HVAC Systems:
Protects critical components such as pumps and fans. - Automation Systems:
Provides reliable motor control in small-scale automated setups.
Benefits
- Enhanced Protection:
Prevents downtime and potential motor damage with reliable overload detection. - Versatility:
Adjustable current range supports a variety of motor ratings. - Energy Efficiency:
Ensures smooth motor operation by reducing unnecessary trips. - Simplified Integration:
Compatible with TeSys D contactors for a unified and space-saving setup.
Technical Specifications
| Specification | Details |
|---|---|
| Current Adjustment Range | 5.5 – 8A |
| Trip Class | 10A |
| Reset Options | Manual/Automatic |
| Phase Failure Sensitivity | Yes |
| Standards | IEC 60947-4-1 |
| Operating Temperature | -20°C to +60°C |
Installation and Maintenance
- Mounting:
Can be directly mounted on TeSys D contactors or standalone in a control panel. - Connection:
Clearly labeled terminals ensure quick and accurate wiring. - Testing and Maintenance:
Built-in test button facilitates regular system checks.
| Range | TeSys TeSys Deca |
|---|---|
| Product name | TeSys LRD TeSys Deca |
| Product or component type | Differential thermal overload relay |
| Device short name | LRD |
| Relay application | Motor protection |
| Product compatibility | LC1D40A LC1D65A LC1D50A |
| Network type | AC DC |
| Thermal overload class | Class 10A conforming to IEC 60947-4-1 |
| Thermal protection adjustment range | 23…32 A |
| [Ui] rated insulation voltage | Power circuit: 600 V conforming to CSA Power circuit: 600 V conforming to UL Power circuit: 690 V conforming to IEC 60947-4-1 |
| Network frequency | 0…400 Hz |
|---|---|
| Mounting support | Plate, with specific accessories Rail, with specific accessories Under contactor |
| Tripping threshold | 1.14 +/- 0.06 Ir conforming to IEC 60947-4-1 |
| Auxiliary contact composition | 1 NO + 1 NC |
| [Ith] conventional free air thermal current | 5 A for signalling circuit |
| Permissible current | 0.95 A at 380 V AC-15 for signalling circuit 0.06 A at 440 V DC-13 for signalling circuit |
| [Ue] rated operational voltage | 690 V AC 0…400 Hz for power circuit conforming to IEC 60947-4-1 |
| Associated fuse rating | 4 A gG for signalling circuit 4 A BS for signalling circuit |
| [Uimp] rated impulse withstand voltage | 6 kV |
| Phase failure sensitivity | Tripping current 130 % of Ir on two phase, the last one at 0 |
| Control type | Red push-button: stop Blue push-button: reset |
| Temperature compensation | -20…60 °C |
| Connections – terminals | Control circuit: screw clamp terminals 2 cable(s) 1…2.5 mm² flexible without cable end Control circuit: screw clamp terminals 2 cable(s) 1…2.5 mm² flexible with cable end Control circuit: screw clamp terminals 2 cable(s) 1…2.5 mm² solid without cable end Power circuit: EverLink BTR screw connectors 1 cable(s) 1…35 mm² flexible without cable end Power circuit: EverLink BTR screw connectors 1 cable(s) 1…35 mm² flexible with cable end Power circuit: EverLink BTR screw connectors 1 cable(s) 1…35 mm² solid without cable end |
| Tightening torque | Control circuit: 1.7 N.m – on screw clamp terminals Power circuit: 5 N.m – on EverLink BTR screw connectors |
| Height | 123 mm |
| Width | 55 mm |
| Depth | 123 mm |
| Net weight | 0.375 kg |
| Climatic withstand | conforming to IACS E10 |
|---|---|
| IP degree of protection | IP20 conforming to IEC 60529 |
| Ambient air temperature for operation | -20…60 °C without derating conforming to IEC 60947-4-1 |
| Ambient air temperature for storage | -60…70 °C |
| Flame retardance | V1 conforming to UL 94 |
| Mechanical robustness | Shocks: 15 Gn for 11 ms conforming to IEC 60068-2-7 Vibrations: 4 gn conforming to IEC 60068-2-6 |
| Dielectric strength | 1.89 kV at 50 Hz conforming to IEC 60947-1 |
| Standards | EN/IEC 60947-4-1 EN/IEC 60947-5-1 UL 60947-4-1 UL 60947-5-1 CSA C22.2 No 60947-4-1 CSA C22.2 No 60947-5-1 GB/T 14048.4 GB/T 14048.5 EN 50495 |
| Product certifications | IEC UL CSA CCC EAC DNV-GL RMRS EU-RO MR LROS (Lloyds register of shipping) ATEX INERIS UKCA |
| Unit Type of Package 1 | PCE |
|---|---|
| Number of Units in Package 1 | 1 |
| Package 1 Height | 6.500 cm |
| Package 1 Width | 10.400 cm |
| Package 1 Length | 13.800 cm |
| Package 1 Weight | 393.000 g |
| Unit Type of Package 2 | S02 |
| Number of Units in Package 2 | 13 |
| Package 2 Height | 15.000 cm |
| Package 2 Width | 30.000 cm |
| Package 2 Length | 40.000 cm |
| Package 2 Weight | 5.394 kg |
| Unit Type of Package 3 | P06 |
| Number of Units in Package 3 | 208 |
| Package 3 Height | 75.000 cm |
| Package 3 Width | 60.000 cm |
| Package 3 Length | 80.000 cm |
| Package 3 Weight | 94.016 kg |
| Warranty | 18 months |
|---|
Main documents
| Datasheet | Download Datasheet |
| Product datasheet | LRD332 |
| Download | |
| Download | |
| Download | |
| CAD Files | Download |
| Download |
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