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TeSys LR9 – LR9D / LR9D 
Schneider LR9F5371 | TeSys LRF – electronic thermal overload relay – 132…220 A – class 10
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CompareSchneider LR9F5371 | TeSys LRF – electronic thermal overload relay – 132…220 A – class 10
Schneider LR9F5371 Description
Schneider LR9F5371 Description
Introduction
In the world of electrical engineering, protecting motors is paramount to ensuring the longevity and efficiency of machinery. Schneider Electric, a leader in this field, offers a range of high-quality products designed to safeguard motors from damage. One such product is the Schneider LR9F5371, a thermal overload relay that stands out for its robust features and reliability. But what exactly makes this device special? Let’s dive into the details.
What is the Schneider LR9F5371?
The Schneider LR9F5371 is a thermal overload relay designed to protect motors from overheating and excessive current. This device is crucial in preventing motor damage by interrupting the circuit when an overload is detected. It is specifically tailored to safeguard motors in various applications, ensuring they operate within safe parameters.
Key Features of the Schneider LR9F5371
Thermal Overload Protection
The primary function of the Schneider LR9F5371 is to provide thermal overload protection. This feature ensures that the motor is automatically disconnected from the power supply if it overheats, thereby preventing potential damage or failure.
Adjustable Trip Settings
Another significant feature is its adjustable trip settings. This allows users to set the relay according to the specific requirements of their motor, providing a tailored protection solution that enhances both safety and performance.
Compact Design
The Schneider LR9F5371 boasts a compact design, making it easy to install in various setups without requiring excessive space. This makes it an ideal choice for both new installations and retrofits.
Technical Specifications
Voltage Ratings
The Schneider LR9F5371 is designed to operate at different voltage levels, making it versatile for various applications. It is compatible with standard industrial voltages, ensuring broad usability.
Current Ratings
With adjustable current settings, the LR9F5371 can be set to match the current rating of the motor it protects. This flexibility ensures optimal protection and performance.
Dimensions and Weight
The device’s compact dimensions and lightweight design make it easy to handle and install, even in confined spaces. This practical design feature is beneficial for technicians and engineers alike.
How the Schneider LR9F5371 Works
Principle of Operation
The Schneider LR9F5371 operates on the principle of thermal overload protection. It uses a bimetallic strip that bends when heated by the current flowing through the motor. If the current exceeds the preset limit, the strip bends enough to trigger the relay and disconnect the motor from the power supply.
Installation Process
Installing the Schneider LR9F5371 is straightforward. It involves connecting the relay in series with the motor circuit. Detailed instructions provided by Schneider Electric ensure that the installation is done correctly, maximizing the device’s effectiveness.
Benefits of Using Schneider LR9F5371
Enhanced Motor Lifespan
By protecting motors from overheating and overloads, the Schneider LR9F5371 significantly extends their lifespan. This reduces the need for frequent replacements and repairs, leading to cost savings over time.
Energy Efficiency
Efficient motor operation is crucial for energy savings. The LR9F5371 ensures that motors run within their optimal parameters, reducing energy wastage and lowering operational costs.
Reduced Downtime
Unplanned downtime can be costly. The Schneider LR9F5371 helps minimize such occurrences by providing reliable protection, ensuring that motors operate smoothly without unexpected interruptions.
Applications of the Schneider LR9F5371
Industrial Uses
In industrial settings, where motors are subject to heavy-duty operations, the Schneider LR9F5371 provides essential protection, ensuring continuous and efficient operation of machinery.
Commercial Applications
Commercial environments also benefit from the LR9F5371’s protection capabilities. It ensures that HVAC systems, elevators, and other motor-driven equipment operate safely and efficiently.
Compatibility with Different Motor Types
The versatility of the LR9F5371 allows it to be used with various motor types, including single-phase and three-phase motors. This broad compatibility makes it a versatile tool in many applications.
Comparing Schneider LR9F5371 with Other Motor Protection Devices
Comparison with Competitors
When compared to other motor protection devices, the Schneider LR9F5371 stands out for its reliability and range of features. Many competitors offer similar products, but the LR9F5371’s adjustable settings and compact design give it an edge.
Unique Selling Points
Its unique selling points include robust thermal protection, ease of installation, and flexible settings. These features make it a preferred choice for many industries.
Installation Guide
Pre-installation Checklist
Before installing the Schneider LR9F5371, ensure that you have all the necessary tools and that the motor and power supply are properly isolated.
Step-by-Step Installation Process
- Disconnect Power: Ensure the power supply to the motor is turned off.
- Mount the Relay: Securely mount the LR9F5371 in the designated location.
- Connect Wires: Follow the wiring diagram provided to connect the relay in series with the motor.
- Set Trip Settings: Adjust the trip settings according to the motor’s specifications.
- Test the Installation: Once installed, test the setup to ensure proper operation.
Safety Precautions
Always adhere to safety guidelines, including wearing protective gear and verifying that all connections are secure before powering up the motor.
Maintenance Tips for Schneider LR9F5371
Regular Inspection Routines
Regular inspections are crucial to ensure the relay is functioning correctly. Look for signs of wear or damage and address any issues promptly.
Common Issues and Troubleshooting
Common issues include incorrect trip settings or loose connections. Refer to the troubleshooting guide provided by Schneider Electric to resolve these problems efficiently.
Customer Reviews and Feedback
Positive Experiences
Many customers praise the Schneider LR9F5371 for its reliability and ease of use. Positive feedback highlights its effectiveness in protecting motors and reducing downtime.
Areas for Improvement
Some users suggest enhancements in the user manual for clearer instructions. However, overall satisfaction remains high.
Where to Buy Schneider LR9F5371
Authorized Dealers
Purchase the Schneider LR9F5371 from authorized dealers to ensure authenticity and warranty coverage. Schneider Electric’s website provides a list of authorized sellers.
Online Platforms
Online platforms like Amazon and specialized industrial supply websites also offer the LR9F5371. Ensure the seller is reputable to avoid counterfeit products.
Pricing and Warranty Information
Cost Range
The price of the Schneider LR9F5371 varies depending on the supplier and any additional features. Generally, it falls within a competitive range for motor protection devices.
Warranty Details
Schneider Electric offers a warranty on the LR9F5371, typically covering defects in materials and workmanship. Refer to the product documentation for specific warranty terms.
| Range | TeSys |
|---|---|
| Product name | TeSys LRF |
| Device short name | LR9F |
| Product or component type | Electronic thermal overload relay |
| Relay application | Motor protection |
| Product compatibility | LC1F185…LC1F265 |
| Network type | AC |
| Thermal overload class | Class 10 conforming to IEC 60947-4 |
| Thermal protection adjustment range | 132…220 A |
| Network frequency | 50/60 Hz |
|---|---|
| Mounting support | Direct on contactor Plate |
| Tripping threshold | 1.12 +/- 0.06 In tripping conforming to IEC 60947-4-1 |
| Surge withstand | 4 kV conforming to IEC 61000-4-5 |
| Contacts type and composition | 1 NO + 1 NC |
| [Ith] conventional free air thermal current | 5 A for control circuit |
| [Ue] rated operational voltage | 1000 V AC 50/60 Hz for power circuit conforming to VDE 0110 group C |
| [Ui] rated insulation voltage | Power circuit: 1000 V AC conforming to IEC 60947-4 |
| [Uimp] rated impulse withstand voltage | 8 kV conforming to IEC 60947-1 |
| Phase failure sensitivity | Tripping in 4 s +/- 20 % conforming to IEC 60947-4-1 |
| Reset | Manual reset on front relay |
| Control type | Dial white full-load current adjustment Test button red Push-button red reset Push-button stop |
| local signalling | Trip indicator |
| Temperature compensation | -20…70 °C |
| Current consumption | <= 5 mA no-load |
| switching capacity for alarm | 0…150 mA |
| Maximum voltage drop | <2.5 V closed state |
| Connections – terminals | Control circuit: screw clamp terminals 1 cable 0.75…2.5 mm² – cable stiffness: flexible – with cable end Control circuit: screw clamp terminals 1 cable 0.75…2.5 mm² – cable stiffness: solid Control circuit: screw clamp terminals 1 cable 0.75…4 mm² – cable stiffness: flexible – without cable end Control circuit: screw clamp terminals 2 cable 1…1.5 mm² – cable stiffness: flexible – with cable end Control circuit: screw clamp terminals 2 cable 1…2.5 mm² – cable stiffness: flexible – without cable end Control circuit: screw clamp terminals 2 cable 1 mm² – cable stiffness: solid Power circuit: lugs-ring terminals M10 |
| Tightening torque | Control circuit: 1.2 N.m on screw clamp terminals Power circuit: 35 N.m on screw clamp terminals |
| height | 101 mm |
| Width | 115 mm |
| Depth | 123.5 mm |
| Net weight | 0.95 kg |
| Standards | IEC 60255-17 IEC 60947-4-1 IEC 60255-8 VDE 0660 EN 60947-4-1 |
|---|---|
| product certifications | UL CSA UKCA |
| Protective treatment | TH |
| IP degree of protection | IP20 conforming to IEC 60529 IP20 conforming to VDE 0106 |
| Ambient air temperature for operation | -20…55 °C conforming to IEC 60255-8 |
| Ambient air temperature for storage | -40…85 °C |
| Operating altitude | <= 2000 m without derating |
| Fire resistance | 850 °C conforming to IEC 60695-2-1 |
| Mechanical robustness | Shocks: 13 Gn for 11 ms conforming to IEC 60068-2-7 Vibrations 5…300 Hz: 2 GN conforming to IEC 60068-2-6 |
| Dielectric strength | 6 kV 50 Hz conforming to IEC 255-5 |
| Electromagnetic compatibility | Resistance to electrostatic discharge: 6 kV in indirect mode conforming to IEC 61000-4-2 Resistance to electrostatic discharge: 8 kV in air conforming to IEC 61000-4-2 Radiated radio-frequency electromagnetic field immunity test: 10 V/m conforming to IEC 61000-4-3 Fast transients immunity test: 2 kV conforming to IEC 61000-4-4 |
| Unit Type of Package 1 | PCE |
|---|---|
| Number of Units in Package 1 | 1 |
| Package 1 Height | 15.000 cm |
| Package 1 Width | 16.500 cm |
| Package 1 Length | 13.000 cm |
| Package 1 Weight | 1.035 kg |
| Unit Type of Package 2 | S04 |
| Number of Units in Package 2 | 11 |
| Package 2 Height | 30 cm |
| Package 2 Width | 40 cm |
| Package 2 Length | 60 cm |
| Package 2 Weight | 12.030 kg |
| Unit Type of Package 3 | P06 |
| Number of Units in Package 3 | 44 |
| Package 3 Height | 75.000 cm |
| Package 3 Width | 60.000 cm |
| Package 3 Length | 80.000 cm |
| Package 3 Weight | 59.048 kg |
| Warranty | 18 months |
|---|
Main Document
Data Sheet : LR9F5371
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