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Schneider LR2K0321 | TeSys K – differential thermal overload relays – 10…14 A – class 10A

Schneider Electric

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2,010 EGP 3,865 EGP

In stock


Schneider LR2K0321 | TeSys K – differential thermal overload relays – 10…14 A – class 10A

Schneider LR2K0321 Description

What is the Schneider LR2K0321?

If you’re looking for a reliable solution to protect your motors from overload, the Schneider LR2K0321 thermal overload relay might be exactly what you need. This small yet powerful device ensures that your motors run smoothly without overheating, thereby extending their lifespan and improving efficiency.

Importance of Motor Protection

Motor protection is crucial in any electrical system. Without it, motors are susceptible to damage from overcurrents, short circuits, and overheating. This can lead to costly repairs and downtime. Thermal overload relays like the Schneider LR2K0321 provide an essential layer of protection, ensuring operational safety and longevity of your equipment.

Overview of Schneider Electric

Company History

Schneider Electric is a global leader in energy management and automation. Founded in 1836, the company has a long history of innovation and quality. Today, Schneider Electric is known for its wide range of products that serve various industries, from residential to commercial to industrial sectors.

Product Range

Schneider Electric’s product portfolio is extensive, including everything from simple switches to complex automation systems. Their products are designed to be efficient, reliable, and sustainable, helping customers manage energy and process in ways that are safe, reliable, efficient, and sustainable.

What is a Thermal Overload Relay?

Definition and Function

A thermal overload relay is a device used to protect electric motors from overheating. It works by measuring the current flowing to the motor and disconnecting the motor from the power supply if the current exceeds a preset limit. This prevents the motor from overheating and getting damaged.

Importance in Electrical Systems

In electrical systems, thermal overload relays play a critical role. They ensure that motors operate within safe limits, preventing overheating and potential fire hazards. This is especially important in industrial settings where motors run continuously and are at higher risk of overheating.

Features of Schneider LR2K0321

Design and Construction

The Schneider LR2K0321 is designed with durability and efficiency in mind. It features a robust construction that can withstand harsh environments. The relay is compact, making it easy to install in various settings without requiring a lot of space.

Electrical Specifications

The LR2K0321 thermal overload relay is designed to work with a wide range of motors. It has adjustable settings to accommodate different motor sizes and types. Its electrical specifications ensure that it can handle varying loads without compromising performance.

Applications of Schneider LR2K0321

Industrial Use

In industrial settings, the Schneider LR2K0321 is used to protect motors that drive machinery and equipment. This ensures smooth operation and prevents costly downtime due to motor failures.

Commercial Use

In commercial buildings, the LR2K0321 helps protect HVAC systems, elevators, and other motor-driven equipment. This not only ensures reliable operation but also enhances energy efficiency.

Residential Use

While less common, the Schneider LR2K0321 can also be used in residential settings to protect home appliances and other motor-driven devices, providing peace of mind to homeowners.

Installation of Schneider LR2K0321

Step-by-Step Guide

  1. Preparation: Ensure the power is turned off before starting the installation. Gather all necessary tools and equipment.
  2. Mounting: Secure the relay in the desired location, ensuring it is firmly attached and properly aligned.
  3. Wiring: Connect the relay to the motor and power supply according to the wiring diagram provided by Schneider Electric.
  4. Adjustment: Set the relay to the appropriate current rating for your motor. This can usually be done using a dial or screws on the relay.
  5. Testing: Turn on the power and test the relay to ensure it is functioning correctly.

Safety Precautions

Always follow the manufacturer’s instructions and safety guidelines when installing the Schneider LR2K0321. Wear appropriate protective gear and ensure that all connections are secure to prevent electrical hazards.

Benefits of Using Schneider LR2K0321

Enhanced Motor Protection

The primary benefit of the Schneider LR2K0321 is its ability to protect motors from overheating. This not only extends the life of the motor but also ensures safe operation, reducing the risk of fire and other hazards.

Energy Efficiency

By preventing motors from running under excessive load conditions, the LR2K0321 helps improve energy efficiency. This can lead to significant cost savings, especially in settings where multiple motors are in operation.

Comparing Schneider LR2K0321 with Other Models

Key Differences

When compared to other models, the Schneider LR2K0321 stands out due to its robust construction, adjustable settings, and reliable performance. It offers a higher degree of protection and versatility, making it suitable for a wide range of applications.


One of the main advantages of the Schneider LR2K0321 is its ease of installation and use. Its compact design and adjustable settings make it a practical choice for various applications, from industrial machinery to residential appliances.

User Reviews and Testimonials

Customer Feedback

Customers who have used the Schneider LR2K0321 often praise its reliability and ease of use. Many users have reported that it has significantly reduced motor failures and downtime in their operations.

Expert Opinions

Experts in the field of electrical engineering often recommend the Schneider LR2K0321 for its robust performance and versatility. Its ability to protect motors from a wide range of potential issues makes it a valuable addition to any electrical system.

Maintenance and Troubleshooting

Common Issues and Solutions

Common issues with thermal overload relays like the LR2K0321 include incorrect settings and loose connections. Regularly check the settings and ensure all connections are tight to prevent these problems.

Regular Maintenance Tips

Regular maintenance of the Schneider LR2K0321 involves checking the connections, adjusting the settings as needed, and ensuring that the relay is free of dust and debris. This will help ensure optimal performance and longevity.

Where to Buy Schneider LR2K0321

Authorized Dealers

Schneider Electric products, including the LR2K0321, can be purchased from authorized dealers. These dealers are knowledgeable about the products and can provide support and guidance during the purchasing process.

Online Platforms

The Schneider LR2K0321 is also available on various online platforms. When purchasing online, ensure that you are buying from a reputable seller to avoid counterfeit products.

Cost and Warranty Information

Pricing Details

The cost of the Schneider LR2K0321 can vary depending on the retailer and the specific model. It is generally considered an affordable option given its reliability and features.

Warranty Terms

Schneider Electric offers a warranty on the LR2K0321, typically covering manufacturing defects and ensuring peace of mind for users. Be sure to check the warranty terms when purchasing.

Sustainability and Environmental Impact

Eco-friendly Features

The Schneider LR2K0321 is designed with sustainability in mind. Its energy-efficient operation helps reduce overall energy consumption, contributing to lower carbon emissions.

Schneider Electric’s Commitment to Sustainability

Schneider Electric is committed to sustainability and environmental responsibility. The company strives to create products that not only meet customer needs but also help protect the planet.

SKU: LR2K0321 Category:
Range TeSys
Product name TeSys LRK
Product or component type Differential thermal overload relay
Device short name LR2K
Relay application Motor protection
Product compatibility LC7K
Network type AC
Thermal overload class Class 10A conforming to IEC 60947-4-1
Thermal protection adjustment range 10…14 A
[Ui] rated insulation voltage Power circuit: 690 V conforming to BS 4941
Power circuit: 690 V conforming to IEC 60947
Power circuit: 750 V conforming to VDE 0110 group C
Power circuit: 600 V conforming to CSA C22.2 No 14
Network frequency <= 400 Hz
Mounting support Under contactor
Plate, with specific accessories
Rail, with specific accessories
Auxiliary contact composition 1 NO + 1 NC
[Ith] conventional free air thermal current 6 A for signalling circuit
[Ue] rated operational voltage <= 690 V for power circuit
690 V AC AC-15 for signalling circuit
250 V DC DC-13 for signalling circuit
Associated fuse rating 6 A gG for signalling circuit conforming to VDE 0660
6 A gG for signalling circuit conforming to IEC 60947
[Uimp] rated impulse withstand voltage 6 kV
Power dissipation per pole 2 W
Phase failure sensitivity Yes conforming to IEC 60947-4-1
Local signalling Trip indicator (yellow)
Control type Red push-button: trip test function
Blue push-button: stop and manual reset
selector switch: manual or automatic reset
Connections – terminals Screw clamp terminals 1 cable(s) 1.5…4 mm²solid
Screw clamp terminals 2 cable(s) 1.5…4 mm²solid
Screw clamp terminals 1 cable(s) 0.75…4 mm²flexible without cable end
Screw clamp terminals 2 cable(s) 0.75…4 mm²flexible without cable end
Screw clamp terminals 1 cable(s) 0.34…2.5 mm²flexible with cable end
Screw clamp terminals 2 cable(s) 0.34…1.5 mm²flexible with cable end
Tightening torque 1.3 N.m – on screw clamp terminals – with screwdriver Philips No 2
1.3 N.m – on screw clamp terminals – with screwdriver flat Ø 6 mm
1.3 N.m – on screw clamp terminals – with screwdriver pozidriv No 2
height 58 mm
Width 45 mm
Depth 65 mm
Net weight 0.145 kg
Standards IEC 60947
BS 4941
VDE 0660
NF C 63-650
product certifications UL
Protective treatment TC conforming to IEC 60068
TC conforming to DIN 50016
IP degree of protection IP2X conforming to IEC 60529
Ambient air temperature for operation -20…55 °C without derating conforming to IEC 60947
-30…60 °C with derating conforming to IEC 60947
Ambient air temperature for storage -40…70 °C
Operating altitude 2000 m without derating
Fire resistance 850 °C conforming to IEC 60695-2-1
Flame retardance V1 conforming to UL 94
Requirement 2 conforming to NF F 16-101
Requirement 2 conforming to NF F 16-102
Mechanical robustness Shocks NO contact: 10 Gn for 11 ms conforming to IEC 60068-2-27
Shocks NC contact: 10 Gn for 11 ms conforming to IEC 60068-2-27
Vibrations NO contact: 2 Gn, 5…300 Hz conforming to IEC 60068-2-6
Vibrations NC contact: 2 Gn, 5…300 Hz conforming to IEC 60068-2-6
Packing Units
Unit Type of Package 1 PCE
Number of Units in Package 1 1
Package 1 Height 5.000 cm
Package 1 Width 7.000 cm
Package 1 Length 8.500 cm
Package 1 Weight 162.000 g
Unit Type of Package 2 S02
Number of Units in Package 2 41
Package 2 Height 15.000 cm
Package 2 Width 30.000 cm
Package 2 Length 40.000 cm
Package 2 Weight 6.972 kg
Unit Type of Package 3 P06
Number of Units in Package 3 656
Package 3 Height 75.000 cm
Package 3 Width 80.000 cm
Package 3 Length 60.000 cm
Package 3 Weight 119.552 kg
Contractual warranty
Warranty 18 months

Main Document

Data Sheet : LR2K0321

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