Schneider Electric LRD325 TeSys LRD Thermal Overload Relay – 17–25A, Class 10A
The Schneider Electric LRD325 is a TeSys LRD differential thermal overload relay designed for reliable motor protection. It provides an adjustable 17–25A thermal protection range with Class 10A tripping characteristics and is suitable for use with compatible TeSys D contactors.
Description
The Schneider Electric LRD325 TeSys LRD thermal overload relay provides dependable protection for motors against thermal overload and phase failure. With an adjustable current range of 17–25A, the relay allows the motor protection setting to be matched to the motor’s rated operating current.
The LRD325 overload relay uses differential thermal protection and is designed for integration with TeSys D contactors, making it suitable for motor starter assemblies in industrial control panels and machinery. Its Class 10A trip characteristic provides standard motor overload protection in accordance with IEC requirements.
The relay features 1NO + 1NC auxiliary contacts, phase-failure sensitivity, temperature compensation, manual reset functionality and a compact design suitable for direct contactor mounting or panel installation. It is also suitable for industrial applications requiring reliable motor overload protection and phase failure protection.
| Specification | Details |
|---|---|
| Manufacturer | Schneider Electric |
| Model / Reference | LRD325 |
| Product Range | TeSys LRD / TeSys Deca |
| Device Type | Differential Thermal Overload Relay |
| Application | Motor Protection |
| Thermal Protection Adjustment Range | 17–25A |
| Thermal Overload Class | Class 10A |
| Thermal Class Standard | IEC 60947-4-1 |
| Product Compatibility | TeSys D contactors |
| Auxiliary Contacts | 1NO + 1NC |
| Phase Failure Sensitivity | 130% of Ir on two phases, last phase at 0 |
| Temperature Compensation | -20°C to +60°C |
| Rated Insulation Voltage | 690V IEC / 600V UL/CSA |
| Rated Impulse Withstand Voltage | 6kV |
| Rated Operational Voltage | Up to 690V AC |
| Network Frequency | 0–400Hz |
| IP Degree of Protection | IP20 |
| Reset | Manual / automatic reset function |
| Mounting | Direct contactor mounting / DIN rail or screw mounting with accessories |
| Operating Temperature | -20°C to +60°C without derating |
| Storage Temperature | -60°C to +70°C |
| Control Terminals | Screw-clamp terminals |
| Standards | IEC/EN 60947-4-1, IEC/EN 60947-5-1 |
| Certifications | UL, CSA, CCC, EAC and other regional approvals |
| EU RoHS | Compliant |
| Mercury Free | Yes |
Key Features
- 17–25A adjustable thermal protection range
- Class 10A thermal overload protection
- Differential thermal overload relay
- Designed for motor protection
- Protection against motor overload
- Protection against phase failure
- 1NO + 1NC auxiliary contacts
- Temperature-compensated operation
- Manual/automatic reset capability
- IP20 protection
- 6kV impulse withstand voltage
- Suitable for TeSys D motor starter assemblies
- Direct mounting with compatible Schneider Electric contactors
- Suitable for industrial motor control panels
- EU RoHS compliant
- Mercury-free construction
Applications
The Schneider Electric LRD325 overload relay is suitable for:
- Industrial motor protection
- Motor starter assemblies
- Motor overload protection
- Phase failure protection
- Pumps and pumping systems
- Fans and ventilation systems
- Compressors
- Conveyors
- Machine tools
- Industrial machinery
- HVAC motor applications
- Electrical control panels
- TeSys D contactor assemblies
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