Schneider Electric LRD16 TeSys LRD Thermal Overload Relay – 9–13A, Class 10A
The Schneider Electric LRD16 is a TeSys LRD differential thermal overload relay with an adjustable 9–13A thermal protection range and Class 10A tripping characteristic according to IEC 60947-4-1. It is designed for motor overload and phase-failure protection and is suitable for use with compatible TeSys D contactors.
Description
The Schneider Electric LRD16 TeSys LRD thermal overload relay provides reliable protection for AC motors against overload conditions and phase failure. Its adjustable 9 to 13A current range allows the relay to be set according to the motor’s rated operating current, while the Class 10A characteristic provides standard motor overload protection.
The LRD16 differential thermal overload relay can be used with compatible Schneider Electric TeSys D contactors, including LC1D12, LC1D18, LC1D25, LC1D32 and LC1D38. It supports AC and DC network types, operates on networks from 0–400Hz, and has a rated operational voltage of 690V AC for the power circuit.
The relay features 1NO + 1NC auxiliary contacts, phase-failure sensitivity, manual stop/reset controls and multiple mounting options. Its 9–13A adjustment range, 6kV impulse withstand voltage and IP20 protection make it suitable for industrial motor starters and control panels.
| Specification | Details |
|---|---|
| Manufacturer | Schneider Electric |
| Model / Reference | LRD16 |
| Product Range | TeSys LRD / TeSys Deca |
| Product Type | Differential Thermal Overload Relay |
| Device Short Name | LRD |
| Application | Motor Protection |
| Thermal Protection Adjustment | 9–13A |
| Thermal Overload Class | Class 10A |
| Standard | IEC 60947-4-1 |
| Network Type | AC / DC |
| Network Frequency | 0–400Hz |
| Rated Operational Voltage (Ue) | 690V AC, 0–400Hz |
| Rated Insulation Voltage (Ui) | 690V IEC / 600V UL / 600V CSA |
| Rated Impulse Withstand Voltage (Uimp) | 6kV |
| Tripping Threshold | 1.14 ± 0.06 Ir |
| Phase Failure Sensitivity | 130% of Ir on two phases; last phase at 0 |
| Auxiliary Contacts | 1NO + 1NC |
| Conventional Thermal Current (Ith) | 5A signalling circuit |
| Permissible Current | 3A at 120V AC-15; 0.22A at 125V DC-13 |
| Compatible Contactors | LC1D12, LC1D18, LC1D25, LC1D32, LC1D38 |
| Mounting | Under contactor, rail or plate with specific accessories |
| Control Type | Red STOP push-button; reset function |
| Protection Rating | IP20 |
| Temperature Compensation | -20 to +60°C |
| Ambient Operation | -20 to +60°C without derating |
| Electrical Connection | Screw-clamp terminals |
| Certifications | IEC, UL, CSA, CCC, EAC, ATEX and Marine certifications |
| Mercury Free | Yes |
Key Features
- 9–13A adjustable thermal overload protection
- Class 10A motor overload protection
- Differential thermal overload relay design
- Phase-failure protection for three-phase motors
- 1NO + 1NC auxiliary contacts
- 690V AC rated operational voltage
- 6kV impulse withstand voltage
- Compatible with selected TeSys D contactors
- Manual stop and reset functions
- -20°C to +60°C temperature compensation
- Multiple mounting options including under-contactor mounting
- Suitable for industrial motor starter applications
- Multi-standard certifications including IEC, UL and CSA
Applications
The Schneider Electric LRD16 overload relay is suitable for:
- Three-phase motor protection
- Motor starter assemblies
- Industrial control panels
- Pumps and pumping systems
- Fans and ventilation equipment
- Compressors
- Conveyors
- Machine tools
- Industrial machinery
- Motor control centres
- Applications using compatible TeSys D contactors
The relay is specifically designed to protect AC circuits and motors against overloads, with phase-failure sensitivity for motor protection.
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