Description

Schneider LRD332 | TeSys LRD thermal overload relays – 23…32 A – class 10A

Schneider LRD332 | TeSys LRD Thermal Overload Relay, 23-32A, Class 10A

1. Introduction

The Schneider LRD332 is a thermal overload relay from the TeSys LRD series, designed to protect electric motors from overloads and phase failure. It features an adjustable current range of 23-32A and Class 10A tripping characteristics, making it ideal for industrial motor control applications. The relay is designed to be directly mounted onto TeSys LC1D contactors, ensuring seamless integration into motor starter circuits.

2. Key Features

  • Adjustable Current Range: 23-32A
  • Tripping Class: 10A (Fast response to overloads)
  • Reset Options: Manual and automatic reset
  • Phase Failure Protection: Prevents motor damage in case of phase loss
  • Mounting Compatibility: Attaches directly to TeSys LC1D contactors
  • Auxiliary Contacts: 1 Normally Open (NO) + 1 Normally Closed (NC)
  • Robust and Compact Design: Suitable for industrial environments

3. Technical Specifications

  • Product Type: Thermal Overload Relay
  • Series: TeSys LRD
  • Current Adjustment Range: 23-32A
  • Tripping Class: 10A
  • Reset Mode: Manual/Automatic
  • Phase Failure Protection: Yes
  • Number of Auxiliary Contacts: 1 NO + 1 NC
  • Mounting Type: Direct attachment to LC1D contactors
  • Compliance: IEC 60947-4-1

4. Applications

  • Motor overload protection
  • Industrial automation systems
  • Pumps, fans, compressors, conveyors
  • HVAC systems
  • Power distribution panels

5. Benefits

  • Reliable Motor Protection: Prevents damage due to overheating
  • Easy Installation: Mounts directly onto LC1D contactors
  • Versatile Reset Options: Allows manual and automatic reset
  • Compact & Space-Saving: Ideal for electrical panels
  • Energy-Efficient & Durable: Reduces maintenance and downtime

6. Conclusion

The Schneider LRD332 is a reliable and efficient thermal overload relay designed for motor protection in industrial and commercial settings. With its adjustable 23-32A range, Class 10A tripping characteristics, and built-in phase failure protection, it is a cost-effective solution for ensuring motor safety and long-term performance.

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 LC1D40A LC1D65A LC1D50A
Network type AC DC
Thermal overload class Class 10A conforming to IEC 60947-4-1
Thermal protection adjustment range 23…32 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 0.95 A at 380 V AC-15 for signalling circuit 0.06 A at 440 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 without cable end Power circuit: EverLink BTR screw connectors 1 cable(s) 1…35 mm² flexible without cable end Power circuit: EverLink BTR screw connectors 1 cable(s) 1…35 mm² flexible with cable end Power circuit: EverLink BTR screw connectors 1 cable(s) 1…35 mm² solid without cable end
Tightening torque Control circuit: 1.7 N.m - on screw clamp terminals Power circuit: 5 N.m - on EverLink BTR screw connectors
Height 123 mm
Width 55 mm
Depth 123 mm
Net weight 0.375 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 Shocks: 15 Gn for 11 ms conforming to IEC 60068-2-7 Vibrations: 4 gn conforming to IEC 60068-2-6
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 DNV-GL RMRS EU-RO MR 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 6.500 cm
Package 1 Width 10.400 cm
Package 1 Length 13.800 cm
Package 1 Weight 393.000 g
Unit Type of Package 2 S02
Number of Units in Package 2 13
Package 2 Height 15.000 cm
Package 2 Width 30.000 cm
Package 2 Length 40.000 cm
Package 2 Weight 5.394 kg
Unit Type of Package 3 P06
Number of Units in Package 3 208
Package 3 Height 75.000 cm
Package 3 Width 60.000 cm
Package 3 Length 80.000 cm
Package 3 Weight 94.016 kg
Contractual warranty
Warranty 18 months

Main documents

Main documents

Datasheet Download Datasheet
Product datasheet LRD332 
User guide
Download
Instruction sheet
Download
Catalogue
Download
CAD Files Download
Environmental disclosure
Download

Main documents

Datasheet Download Datasheet
Product datasheet LRD332 
User guide
Download
Instruction sheet
Download
Catalogue
Download
CAD Files Download
Environmental disclosure
Download

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