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Schneider LRD340 | TeSys LRD thermal overload relays – 30…40 A – class 10A
Schneider LRD340: Comprehensive Overview
it is a thermal overload relay designed to protect electric motors from overheating and overloading. As part of Schneider Electric’s TeSys range, this relay offers precision, reliability, and robust protection, making it an essential component in motor control and protection systems.
Key Features
- Current Adjustment Range:
- Adjustable between 37 to 50A, providing flexibility for various motor ratings.
- Trip Class:
- Designed with Class 10A for rapid response to overload conditions.
- Integrated Protection:
- Protects motors against phase imbalance, phase loss, and overload, enhancing system reliability.
- Manual and Automatic Reset Options:
- Offers selectable manual or automatic reset functionality for convenience.
- Compact and Modular Design:
- Seamlessly integrates with TeSys D contactors for a streamlined motor control setup.
- Test and Stop Functions:
- Includes built-in test and stop buttons for ease of testing and maintenance.
Applications
The LRD340 is ideal for a variety of motor protection applications, such as:
- Industrial Motors:
Safeguards motors in manufacturing, conveyor systems, and processing equipment. - Pumps and Fans:
Ensures reliable operation in HVAC and water management systems. - Automation Systems:
A key component in automated setups requiring precise motor control and protection.
Benefits
- Enhanced Motor Protection:
Detects and mitigates overloads, reducing downtime and preventing motor damage. - Versatility:
Wide current adjustment range accommodates multiple motor sizes. - Easy Integration:
Compatible with TeSys contactors, simplifying installation and system design. - Energy Efficiency:
Optimizes motor performance by reducing unnecessary tripping.
Technical Specifications
| Specification | Details |
|---|---|
| Current Adjustment Range | 37 – 50A |
| 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
- Installation:
Mounts directly onto TeSys D contactors or can be panel-mounted for standalone use. - Wiring:
Features clearly labeled terminals for error-free connections. - Testing:
Regularly test using the built-in test button to ensure optimal performance.
| 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 | LC1D65A LC1D50A LC1D40A |
| Network type | AC DC |
| Thermal overload class | Class 10A conforming to IEC 60947-4-1 |
| Thermal protection adjustment range | 30…40 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 | 70 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 | 6.400 cm |
| Package 1 Width | 10.400 cm |
| Package 1 Length | 13.600 cm |
| Package 1 Weight | 394.000 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 | 5.413 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 | 95.800 kg |
| Warranty | 18 months |
|---|
Main documents
| Datasheet | Download Datasheet |
| Product datasheet | LRD340 |
| Download | |
| Download | |
| Download | |
| CAD Files | Download |
| Download |
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