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Easy TeSys Protect
Schneider LRE357 | Thermal overload relay,EasyPact TVS,37…50A,class 10A
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2,231.80 EGP 4,133.00 EGP
In stock
Schneider LRE357 | Thermal overload relay,EasyPact TVS,37…50A,class 10A
Schneider LRE357: Comprehensive Overview
Introduction
The Schneider LRE357 is a thermal overload relay designed to protect motors against overheating caused by overcurrent, phase imbalance, or phase failure. As part of Schneider Electric’s reliable and durable line of motor protection solutions, this relay is optimized for use with TeSys contactors, ensuring seamless integration in industrial and commercial applications.
Technical Specifications
- Model Number: LRE357
- Current Range: Adjustable from 23 to 32 A
- Compatible Contactor Range: Designed for use with TeSys D series contactors
- Trip Class: Class 10 (suitable for standard motor protection)
- Mounting Type: Direct mounting on contactor or separate mounting
- Reset Option: Manual and automatic reset options available
- Standards Compliance: Meets IEC 60947-4-1
Key Features
- Precise Motor Protection:
- Adjustable thermal overload setting ensures protection tailored to motor specifications.
- Wide Compatibility:
- Integrates seamlessly with TeSys D contactors for streamlined motor control solutions.
- Phase Loss Protection:
- Safeguards motors from damage caused by phase failure or imbalance.
- User-Friendly Operation:
- Equipped with a clear trip indicator and dual reset options for convenient use.
- Robust and Compact Design:
- Built for durability in demanding industrial environments while maintaining a space-saving form factor.
Applications
The Schneider LRE357 is widely used in:
- Industrial Automation: Protects motors driving machinery and equipment.
- HVAC Systems: Ensures reliable motor operation in heating, ventilation, and air-conditioning systems.
- Material Handling: Safeguards conveyor motors from thermal damage.
- Pumps and Compressors: Prevents motor burnout in critical fluid handling systems.
Benefits
- Enhanced Motor Reliability: Reduces wear and tear by protecting against overcurrent and phase faults.
- Improved Safety: Prevents potential hazards by automatically disconnecting the motor during fault conditions.
- Cost-Effective Maintenance: Minimizes downtime and extends motor lifespan.
- Ease of Integration: Simplifies motor control setup with direct mounting capabilities.
| Range | Easy TeSys |
|---|---|
| range of product | Easy TeSys Protect |
| product or component type | Differential thermal overload relay |
| Device short name | LRE |
| Relay application | Motor protection |
| Phase failure sensitivity | Tripping current 130 % of Ir on two phase, the last one at 0 conforming to IEC 60947-4-1 |
| Product compatibility | LC1E50…95 |
|---|---|
| Network type | AC |
| Network frequency | 50…60 Hz |
| Mounting support | Under contactor Plate, with specific accessories Rail, with specific accessories |
| Thermal overload class | Class 10A conforming to IEC 60947-4-1 |
| Signalling function | Relay trip indicator |
| Thermal protection adjustment range | 37…50 A |
| Tripping threshold | 1.14 +/- 0.06 Ir conforming to IEC 60947-4-1 |
| Mechanical robustness | Shocks: 6 Gn for 11 ms conforming to IEC 60068-2-7 Vibrations: 3 GN conforming to IEC 60068-2-6 |
| Auxiliary contact composition | 1 NO + 1 NC |
| [Ith] conventional free air thermal current | 5 A for signalling circuit |
| [Ue] rated operational voltage | <= 690 V AC |
| Associated fuse rating | 100 A gG for power circuit 63 A aM for power circuit 5 A gG for signalling circuit |
| [Ui] rated insulation voltage | 690 V conforming to IEC 60947-4-1 |
| [Uimp] rated impulse withstand voltage | 6 kV |
| Local signalling | Trip indicator |
| Control type | Push-button red stop: Push-button green reset: |
| Temperature compensation | -20…60 °C |
| Connections – terminals | Signalling circuit: screw clamp terminals 2 1…2.5 mm² – cable stiffness: flexible without cable end Signalling circuit: screw clamp terminals 2 1…2.5 mm² – cable stiffness: flexible with cable end Signalling circuit: screw clamp terminals 2 1…2.5 mm² – cable stiffness: solid without cable end Power circuit: screw clamp terminals 1 4…35 mm² – cable stiffness: flexible without cable end Power circuit: screw clamp terminals 1 4…35 mm² – cable stiffness: flexible with cable end Power circuit: screw clamp terminals 1 4…35 mm² – cable stiffness: solid without cable end |
| Recommended tightening torque | Power circuit: 9 N.m – on screw clamp terminals Signalling circuit: 1.7 N.m – on screw clamp terminals |
| Height | 54 mm |
| Width | 70 mm |
| Depth | 113 mm |
| net weight | 0.46 kg |
| Standards | IEC 60947-4-1 IEC 60947-5-1 |
|---|---|
| Product certifications | EAC |
| Protective treatment | TH conforming to IEC 60068 |
| 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 -20…70 °C with derating |
| Ambient air temperature for storage | -60…80 °C |
| Fire resistance | 850 °C conforming to IEC 60068-2-1 |
| Dielectric strength | 6 kV at 50 Hz conforming to IEC 60255-5 |
| Electromagnetic compatibility | Surge withstand: 6 kV conforming to IEC 60801-5 |
| Unit Type of Package 1 | PCE |
|---|---|
| Number of Units in Package 1 | 1 |
| Package 1 Height | 8 cm |
| Package 1 Width | 9 cm |
| Package 1 Length | 12.5 cm |
| Package 1 Weight | 484 g |
| Unit Type of Package 2 | S02 |
| Number of Units in Package 2 | 9 |
| Package 2 Height | 15 cm |
| Package 2 Width | 30 cm |
| Package 2 Length | 40 cm |
| Package 2 Weight | 4.742 kg |
| Warranty | 18 months |
|---|
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