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Schneider LRD21 | Thermal overload relay, TeSys LRD, 12…18 A, class 10A
Schneider LRD21: A Comprehensive Description
In the realm of electrical components, it holds a significant position. This article aims to provide a detailed overview of it, covering its specifications, applications, installation process, maintenance tips, troubleshooting common issues, comparison with similar products, customer reviews, pricing, and availability.
Introduction
it is a thermal overload relay designed to protect motors from overloads and phase failures. It’s a crucial component in various industrial and commercial applications where motor protection is paramount.
Specifications
- Current Range: 12 to 18.5 Amperes
- Operating Temperature: -25°C to +55°C
- Contact Configuration: 1 Normally Open (NO) + 1 Normally Closed (NC)
- Mounting: Directly mounted onto contactors
- Certifications: UL, CSA, CE
Applications of Schneider LRD21
it finds applications in:
- HVAC systems
- Conveyor belts
- Pumps
- Compressors
- Industrial machinery
Installation Process
Installing it is straightforward. It can be directly mounted onto contactors using screws, ensuring a secure connection.
Maintenance Tips
To ensure optimal performance, regular maintenance of it is recommended. This includes:
- Periodic inspection for dust and debris
- Checking for loose connections
- Verifying proper calibration
Troubleshooting Common Issues
Common issues with it include:
- Overheating: Ensure proper ventilation around the relay.
- Faulty Connections: Tighten all connections to prevent intermittent faults.
- Incorrect Calibration: Re-calibrate the relay according to the motor’s specifications.
Comparison with Similar Products
Compared to similar thermal overload relays, it stands out due to its robust build quality, wide operating temperature range, and reliable performance.
Customer Reviews and Feedback
Customers praise it for its durability, ease of installation, and effectiveness in protecting motors from overloads. However, some have reported issues with calibration accuracy.
Pricing and Availability
it is competitively priced and widely available through Schneider Electric distributors and online retailers.
Conclusion
In conclusion, it is a versatile thermal overload relay that offers reliable motor protection in various industrial and commercial settings. With its robust construction, ease of installation, and wide operating temperature range, it remains a preferred choice among engineers and technicians.
| 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 | LC1D32 LC1D18 LC1D25 LC1D38 |
| Network type | AC DC |
| Thermal overload class | Class 10A conforming to IEC 60947-4-1 |
| Thermal protection adjustment range | 12…18 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 | 1.5 A at 240 V AC-15 for signalling circuit 0.1 A at 250 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 Power circuit: screw clamp terminals 1 cable(s) 1.5…10 mm² flexible without cable end Power circuit: screw clamp terminals 1 cable(s) 1…4 mm² flexible with cable end Power circuit: screw clamp terminals 1 cable(s) 1…6 mm² solid |
| Tightening torque | Control circuit: 1.7 N.m – on screw clamp terminals Power circuit: 2.5 N.m – on screw clamp terminals |
| Height | 66 mm |
| Width | 45 mm |
| Depth | 70 mm |
| Net weight | 0.124 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 | Vibrations: 6 Gn conforming to IEC 60068-2-6 Shocks: 15 Gn for 11 ms conforming to IEC 60068-2-7 |
| 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 BV RINA DNV-GL LROS (Lloyds register of shipping) ATEX INERIS UKCA |
| Unit Type of Package 1 | PCE |
|---|---|
| Number of Units in Package 1 | 1 |
| Package 1 Height | 5.000 cm |
| Package 1 Width | 7.800 cm |
| Package 1 Length | 8.800 cm |
| Package 1 Weight | 147.000 g |
| Unit Type of Package 2 | S02 |
| Number of Units in Package 2 | 24 |
| Package 2 Height | 15.000 cm |
| Package 2 Width | 30.000 cm |
| Package 2 Length | 40.000 cm |
| Package 2 Weight | 3.842 kg |
| Warranty | 18 months |
|---|
Main documents
| Datasheet | Download Datasheet |
| Product datasheet | LRD21 |
| Download | |
| Download | |
| Download | |
| CAD Files | Download |
| Download |
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