Description

Schneider LR2K0307 | TeSys K – differential thermal overload relays – 1.2…1.8 A – class 10A

The Schneider LR2K0307 is a part of the TeSys K series, designed to provide efficient protection for motors and electrical circuits against thermal overload. This differential thermal overload relay is engineered to ensure the safe operation of motor control circuits by protecting them from overheating caused by prolonged overcurrent conditions. With a current range of 1.2 to 1.8 A and class 10A time delay, the LR2K0307 is ideal for industrial and commercial applications requiring reliable motor protection.

Technical Specifications

Here are the key technical details of the LR2K0307 thermal overload relay:

  • Model: LR2K0307
  • Brand: Schneider Electric
  • Type: Differential Thermal Overload Relay
  • Current Range: 1.2 to 1.8 A
  • Protection Class: Class 10A
  • Mounting: Designed for easy installation with TeSys contactors
  • Voltage Rating: Compatible with 3-phase AC systems
  • Design: Compact and robust for panel mounting
  • Adjustable Settings: Adjustable current settings to match the protection needs of the motor
  • Trip Mechanism: Thermal trip based on the motor’s heat generation under overload conditions

Key Features

The Schneider LR2K0307 thermal overload relay offers several features that make it an excellent choice for motor protection:

  1. Precise Motor Protection – Provides reliable protection against thermal overload by monitoring motor temperature and preventing overheating.
  2. Adjustable Range – The adjustable current range of 1.2 to 1.8 A allows for customization according to motor specifications, ensuring accurate protection.
  3. Class 10A Time Delay – Offers a Class 10A time delay, which provides enough time for transient currents without triggering unnecessary shutdowns.
  4. Easy Integration – Specifically designed for seamless integration with TeSys K contactors, making installation quick and simple.
  5. Durable and Reliable – Built with high-quality materials to ensure long-lasting protection even under harsh operating conditions.
  6. Enhanced Safety – Ensures safe operation by preventing overheating, thereby reducing the risk of fire, equipment damage, and motor failure.

Applications

The LR2K0307 thermal overload relay is primarily used for protecting motors and electrical equipment in various industrial and commercial applications:

  1. Motor Protection – Protects motors from thermal overloads caused by sustained overcurrent conditions, preventing damage and downtime.
  2. Industrial Machinery – Commonly used in industrial applications where machinery and equipment are powered by electric motors, ensuring their safe operation.
  3. HVAC Systems – Ideal for protecting motors in heating, ventilation, and air conditioning systems, ensuring system reliability.
  4. Conveyor Systems – Provides motor protection in conveyor systems to prevent overheating and reduce maintenance costs.
  5. Pumps and Compressors – Used to protect pumps and compressors in various industries from overloads and potential failure due to excess heat.

 

Additional information

brands

Schneider Electric

Specifications

Main
Range TeSys
product name TeSys LRK
Product or component type Differential thermal overload relay
Device short name LR2K
Relay application Motor protection
Product compatibility LC1K LP1K LP4K LC7K
network type AC DC
Thermal overload class Class 10A conforming to IEC 60947-4-1
Thermal protection adjustment range 1.2…1.8 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
Complementary
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
Product weight 0.145 kg
Environment
Standards IEC 60947 NF C 63-650 VDE 0660 BS 4941
Product certifications UL CSA UKCA
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 8.300 cm
Package 1 Width 7.000 cm
Package 1 Length 5.000 cm
Package 1 Weight 157.000 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 6.760 kg
Unit Type of Package 3 P06
Number of Units in Package 3 656
Package 3 Height 75.000 cm
Package 3 Width 60.000 cm
Package 3 Length 80.000 cm
Package 3 Weight 119.428 kg
Contractual warranty
Warranty 18 months

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