New Original Schneider LR97D25M7 LR97D Electronic Thermal Overload Relay
"*" indicates required fields
New Original Schneider LR97D25M7 TeSys LR97D Electronic Thermal Overload Relay
1. Product Overview
This model features an adjustable current setting range of 5 A to 25 A, powered by 200–240 V AC control supply voltage. Adopting electronic chip sensing technology instead of traditional bimetallic thermal elements, it delivers far higher protection precision, stable performance under wide temperature variation, and comprehensive multi-dimensional motor fault protection functions including overload, phase loss, locked rotor and mechanical stalling protection. Equipped with three independent adjustment knobs, LED fault indication lights, manual/automatic reset switching and one changeover auxiliary contact, it is widely applied to three-phase asynchronous motors on machine tools, water pumps, fans, conveyor lines and general industrial automation equipment. It supports both direct plug-in installation on matched contactors and standalone 35 mm DIN rail mounting inside electrical cabinets, fully complying with global industrial low-voltage electrical safety standards.
2. Main Functions
- Precision Adjustable Overload Protection
Three rotary dials independently set load current, overload tripping time and motor starting delay time. The load current can be continuously adjusted from 5 A to 25 A; the relay will cut off the control loop automatically once long-term overload current exceeds the preset threshold to prevent motor winding overheating burnout.
- Comprehensive Multi-Fault Detection & Tripping
- Phase failure protection: Trips within 3 seconds when any one phase power supply is lost;
- Locked rotor protection: Instantly trips within 0.5 seconds if motor rotor is stuck and current surges over 3 times the set value;
- Mechanical jam protection: Quick short-time tripping available for equipment overload stalling scenarios.
- Dual Reset Mode Selection
Users can switch between manual reset and automatic reset modes according to on-site requirements. Manual reset avoids accidental restart after faults, suitable for high-safety mechanical equipment; automatic reset fits circulating running devices such as water pumps and ventilation fans.
- Fault Visual Indication & Signal Feedback
Built-in LED indicator lights display normal running status and fault tripping causes clearly. The integrated 1CO (1 Normally Open + 1 Normally Closed) auxiliary contact synchronously acts upon tripping, transmitting fault signals to PLC, alarm buzzers and remote monitoring systems.
- Parameter Locking Function
A transparent sealing cover can lock all adjustment knobs after parameter setting, preventing unauthorized personnel from tampering with protection parameters on site.
- Strong Anti-Interference & Wide Environmental Adaptability
Built-in surge absorption circuit resists voltage surge and electromagnetic interference from industrial power grids; stable operation is guaranteed under fluctuating temperature and vibration workshop conditions.
3. Technical Characteristics
| Technical Parameter | Detailed Specification |
|---|---|
| Full Model | LR97D25M7 |
| Product Series | TeSys LR97D Electronic Overload Relay |
| Adjustable Load Current Range | 5 A ~ 25 A |
| Rated Control Supply Voltage | 200 V ~ 240 V AC 50/60 Hz |
| Rated Power Circuit Voltage | Max 690 V AC |
| Rated Insulation Voltage | 1000 V |
| Impulse Withstand Voltage | 6 kV |
| Auxiliary Contact Configuration | 1 C/O (1NO+1NC) |
| Conventional Thermal Current of Control Contacts | 3 A |
| Tripping Time Adjustable Range | Overload time: 0.3 ~ 10 s; Starting delay time: 0.5 ~ 30 s |
| Phase Loss Tripping Delay | 3 s |
| Locked Rotor Tripping Delay | 0.5 s |
| Reset Mode | Manual / Automatic switchable |
| Protection Class | IP20 |
| Operating Ambient Temperature | -25 ℃ ~ +60 ℃ |
| Storage Temperature Range | -40 ℃ ~ +70 ℃ |
| Mounting Methods | Direct plug-on LC1D09~LC1D38 contactors; 35mm DIN rail standalone mounting |
| Housing Flame Retardant Grade | UL94 V0 |
| Compliance Standards | IEC 60947-4-1, UL508, CSA, RoHS |
Core Technical Advantages
- Electronic sensing structure eliminates thermal drift defects of bimetallic relays, consistent tripping accuracy in long-term operation;
- Multi-dimensional fault protection greatly reduces motor burnout failure rate;
- Compact 45mm unified width matching TeSys D series contactors, neat cabinet layout;
- Complete parameter adjustment and locking design, convenient for on-site commissioning and management;
- Low power consumption electronic circuit, stable performance under harsh industrial environments.
4. Product Overall Dimensions & Weight
External Dimensions (Unit: Millimeter)
| Dimension Item | Size Value |
|---|---|
| Total Width | 45 |
| Total Height | 67.5 |
| Overall Depth | 67.5 |
Weight Parameters
| Weight Category | Specific Value |
|---|---|
| Single Unit Net Weight | 172 g |
| Original Packaged Gross Weight | 195 g |
5. 10 Schneider Similar Functional Electronic Overload Relays (LR97D Series)
- LR97D015B 0.3~1.5A, 24V AC/DC Electronic Overload Relay
- LR97D07F7 1.2~7A, 110V AC Electronic Overload Relay
- LR97D07M7 1.2~7A, 220V AC Electronic Overload Relay
- LR97D25F7 5~25A, 110V AC Electronic Overload Relay
- LR97D25B 5~25A, 24V AC/DC Electronic Overload Relay
- LR97D38M7 20~38A, 220V AC Electronic Overload Relay
- LR97D38F7 20~38A, 110V AC Electronic Overload Relay
- LR97D38B 20~38A, 24V AC/DC Electronic Overload Relay
- LR97D015M7 0.3~1.5A, 220V AC Electronic Overload Relay
- LR97D015F7 0.3~1.5A, 110V AC Electronic Overload Relay
About us
Atifts Technology Co., Ltd. @ 2024
