Description

Schneider LRD12 | Thermal overload relay, TeSys LRD, 5.5…8 A, class 10A

 

Schneider LRD12 | Thermal Overload Relay, TeSys LRD, 5.5-8A, Class 10A

1. Overview

The Schneider LRD12 is a thermal overload relay from the TeSys LRD series, designed to protect electrical motors from overloads and phase failures. It operates within a current range of 5.5 to 8A and belongs to Class 10A, ensuring quick and reliable motor protection.

2. Key Features

  • Brand: Schneider Electric
  • Series: TeSys LRD
  • Model: LRD12
  • Type: Thermal Overload Relay
  • Current Range: 5.5 – 8A
  • Trip Class: 10A
  • Phase Failure Protection: Yes
  • Reset Mode: Manual and Automatic
  • Mounting: Directly on TeSys D contactors
  • Auxiliary Contacts: 1 NO + 1 NC

3. Benefits

  • Reliable Motor Protection: Prevents damage due to overload and phase loss.
  • Fast Response: Class 10A tripping time ensures quick action to prevent overheating.
  • Easy Integration: Designed for seamless connection with TeSys D contactors.
  • Dual Reset Options: Offers both manual and automatic reset for convenience.
  • Compact Design: Space-efficient and suitable for panel installations.

4. Applications

  • Industrial Machinery: Protects motors in conveyors, pumps, and compressors.
  • HVAC Systems: Ensures safe operation of heating and cooling motors.
  • Manufacturing Plants: Used in automated production lines and robotics.
  • Water Treatment Plants: Prevents motor damage in water pumping systems.

5. Conclusion

The Schneider LRD12 TeSys LRD Thermal Overload Relay is a dependable and efficient solution for motor protection in industrial and commercial applications. With its 5.5-8A range, Class 10A response time, and easy integration with TeSys D contactors, it ensures enhanced safety and reliability for electrical systems.

Additional information

brands

Schneider Electric

Specifications

Main
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 LC1D18 LC1D25 LC1D32 LC1D12 LC1D09 LC1D38
Network type DC AC
Thermal overload class Class 10A conforming to IEC 60947-4-1
Thermal protection adjustment range 5.5…8 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
Complementary
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: 1.7 N.m - on screw clamp terminals
Height 66 mm
Width 45 mm
Depth 70 mm
Net weight 0.124 kg
Environment
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
Packing Units
Unit Type of Package 1 PCE
Number of Units in Package 1 1
Package 1 Height 5 cm
Package 1 Width 7.9 cm
Package 1 Length 9 cm
Package 1 Weight 142 g
Unit Type of Package 2 S02
Number of Units in Package 2 24
Package 2 Height 15 cm
Package 2 Width 30 cm
Package 2 Length 40 cm
Package 2 Weight 3.959 kg
Unit Type of Package 3 P06
Number of Units in Package 3 384
Package 3 Height 80 cm
Package 3 Width 80 cm
Package 3 Length 60 cm
Package 3 Weight 69.54 kg
Contractual warranty
Warranty 18 months

Main documents

Main documents

Datasheet Download Datasheet
Product datasheet LRD12
User guide
Download
Instruction sheet
Download
Catalogue
Download
CAD Files Download
Environmental disclosure
Download

Main documents

Datasheet Download Datasheet
Product datasheet LRD12
User guide
Download
Instruction sheet
Download
Catalogue
Download
CAD Files Download
Environmental disclosure
Download

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