steve
Got hold of Sime for a Carrier card for…
Got hold of Sime for a Carrier card for a chiller. Machine down in a factory. Received the new card in express time machine and plant now up and running fantastic service form Sime
3 months ago
LR97D38M7
Schneider LR97D38M7 available at EU Automation. Get in touch today for a quick price.
Based on over 4900 reviews
Full 12-month warranty
Available for dispatch immediately
We deliver worldwide
What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
All orders are subject to product availability. See our T&Cs.
Ask our team
What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
Schneider Electric LR97D38M7 is a TeSys LR97D electronic overcurrent relay designed to provide reliable motor overload protection and monitoring when used with TeSys D contactors (compatible with LC1D25…D38). It operates from a 200–240 V AC supply at 50/60 Hz and offers an adjustable thermal protection setting range of 20–38 A, making it well suited to a wide range of three‑phase motor applications.
This relay supports phase-failure detection (typically within 3 seconds) and protection against locked-rotor or mechanical jamming conditions (I > 3 × current setting). A 1 C/O (changeover) output contact is provided for control circuit signalling, with clear status indication via two front LEDs. Flexible reset options include manual reset, electrical reset by briefly interrupting the supply, and an automatic reset with a fixed 120-second delay. Time-delay adjustments are available via front-mounted controls to help coordinate protection with the application. The unit can be mounted directly on the contactor or on a rail, with a compact footprint of 67.5 mm (H) × 45 mm (W) × 67.5 mm (D).
This relay supports phase-failure detection (typically within 3 seconds) and protection against locked-rotor or mechanical jamming conditions (I > 3 × current setting). A 1 C/O (changeover) output contact is provided for control circuit signalling, with clear status indication via two front LEDs. Flexible reset options include manual reset, electrical reset by briefly interrupting the supply, and an automatic reset with a fixed 120-second delay. Time-delay adjustments are available via front-mounted controls to help coordinate protection with the application. The unit can be mounted directly on the contactor or on a rail, with a compact footprint of 67.5 mm (H) × 45 mm (W) × 67.5 mm (D).
| Specification | Description |
|---|---|
| Manufacturer | Schneider Electric |
| Part Number | LR97D38M7 |
| Product Type | Electronic overcurrent relay for motor protection applications |
| Range / Series | TeSys LR97D (TeSys D family) |
| Primary Function | Electronic overload protection with phase-failure sensitivity and locked-rotor / mechanical jamming detection |
| Rated Supply Voltage (Us) | 200 to 240 V AC |
| Supply Frequency | 50 to 60 Hz |
| Thermal Protection Adjustment Range | 20 to 38 A |
| Tripping Threshold | 20 to 34 A |
| Contact Configuration | 1 C/O (changeover) output contact |
| Signalling | 2 LED indicators |
| Reset Modes | Automatic reset (fixed 120 s), manual reset, or electrical reset by interrupting supply for ≥ 0.1 s |
| Time Settings | O-time adjustable 0.2 to 10 s and 0.3 to 10 s; D-time adjustable 0.5 to 30 s |
| Compatible Contactor Range | TeSys D contactors LC1D25 to LC1D38 |
| Mounting | Direct mounting on contactor or rail mounting |
| Rated Operational Voltage (Ue) | Up to 690 V AC (power circuit, IEC 60947-4-1); up to 600 V AC (power circuit, UL/CSA) |
| Rated Insulation Voltage (Ui) | 690 V (IEC); 600 V (UL/CSA) |
| Rated Impulse Withstand Voltage (Uimp) | 6 kV |
| Surge Withstand | 6 kV (IEC 61000-4-5) |
| Phase Failure Sensitivity | Trip in < 3 s (typical response) |
| Conventional Free Air Thermal Current (Ith) | 3 A (control circuit) |
| Control Circuit Terminal Capacity | 1 or 2 conductors, 1 to 25 mm² (flexible; with or without cable end; cable or lug-clamp) |
| Power Circuit Terminal Capacity | 1 to 6 mm² (flexible, without cable end) or 2.5 to 10 mm² (flexible, with cable end; cable or lug-clamp) |
| Tightening Torque | Control circuit: 0.6 to 1.2 N·m (lug-clamp); Power circuit: 2 N·m (cable) |
| Degree of Protection | IP20 (IEC 60529) |
| Operating Temperature | -25 to +60 °C |
| Storage Temperature | -30 to +80 °C |
| Maximum Operating Altitude | 2000 m |
| Dimensions (H × W × D) | 67.5 × 45 × 67.5 mm |
| Net Weight | 0.172 kg |
| Standards | IEC 60947; IEC 60255-6 |
| Product Certifications | UL, CSA, GOST |
| Protective Treatment | TH (IEC 60068) |
What does an electronic overcurrent relay do in a motor starter?
It monitors motor current and trips when overload conditions occur, helping to protect the motor against overheating. This unit also detects phase failure and can respond to locked-rotor or mechanical jamming conditions when current rises above a multiple of the set value.
What supply voltage does it require?
It is designed for a 200 to 240 V AC supply, 50/60 Hz.
What current range can be set for thermal protection?
The thermal protection adjustment range is 20 to 38 A, allowing you to set protection according to the motor’s full-load current.
How quickly does it detect phase failure?
Phase failure sensitivity is specified as less than 3 seconds.
How does it respond to locked-rotor or mechanical jamming conditions?
It is designed to detect locked rotor/mechanical jamming when current exceeds 3 times the configured current setting (I > 3 × Isetting) and then trip accordingly.
What mounting options are available?
It can be mounted directly on compatible contactors (LC1D25 to LC1D38) or mounted on a DIN rail.
What type of output contact does it provide?
It provides one changeover contact (1 C/O) for control/indication circuits.
What reset options are available after a trip?
Reset can be automatic (fixed 120 seconds), manual, or electrical by interrupting the power supply for a minimum of 0.1 seconds.
What time-delay adjustments are available?
Time adjustment is provided via front controls with ranges including 0.2 to 10 seconds (O-time knob), 0.3 to 10 seconds (O-time knob), and 0.5 to 30 seconds (D-time knob), depending on the selected function.
How is status indicated on the unit?
It includes two LEDs for local signalling and status indication.
What are the key electrical ratings for insulation and impulse withstand?
Rated impulse withstand voltage (Uimp) is 6 kV. Rated insulation voltage (Ui) is up to 690 V (IEC) for the power circuit and 600 V (UL/CSA) for the power circuit, with rated operational voltage up to 690 V AC 50/60 Hz (IEC) for the power circuit.
What are the operating environment limits and enclosure rating?
It is rated IP20 and is specified for operation from -25 to +60 °C, with storage from -30 to +80 °C, and operation up to 2000 m altitude.
What cable sizes and tightening torques should be used on the terminals?
Control circuit terminals accept flexible conductors typically from 1 to 25 mm² (with or without cable end, depending on termination method). Power circuit terminals accept flexible conductors typically from 1 to 6 mm² (without cable end) or 2.5 to 10 mm² (with cable end). Tightening torque is 0.6 to 1.2 N·m for the control circuit on lug-clamp terminals and 2 N·m for the power circuit on cable connections.
What are the approximate dimensions and weight for panel layout planning?
Overall dimensions are approximately 67.5 mm (H) × 45 mm (W) × 67.5 mm (D), with a net weight of about 0.172 kg.
Which product standards and approvals are referenced for this device?
It is specified against IEC 60947 and IEC 60255-6, and product certifications include UL, CSA and GOST (as referenced in the product data).
- Motor overload protection for three-phase industrial motors with adjustable current settings from 20 to 38 A
- Protection against phase failure (single-phasing) to help prevent overheating and motor damage
- Locked-rotor and mechanical jamming detection where high current persists above the set threshold
- Integration into TeSys D motor starter assemblies using compatible LC1D25 to LC1D38 contactors
- Panel-building applications requiring compact electronic protection components on a contactor or DIN rail
- Equipment protection in pump, fan and blower systems where load conditions can vary during operation
- Conveyor and materials-handling drives where intermittent overloads and stalled conditions may occur
- Compressor and HVAC plant motors where abnormal start or running currents need reliable monitoring
- Machine tools and process machinery motor circuits needing repeatable electronic trip performance
- Control-circuit signalling applications using a changeover (1 C/O) contact for trip indication and interlocking
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
Delivery
- Logistic partners UPS, FedEx and DHL
- International delivery available
- Premium nine hour delivery service available to anywhere in Europe
- Same day dispatch from group stock
Warranty
All parts new or reconditioned are covered by EU Automation 12 month warranty
Returns
No hassle returns policy
Dedicated customer support team
Payment
Trade CreditWe understand that credit is a necessary part of business and offer credit agreements on request, subject to status.
Payment optionsWe accept Bank transfers and the following methods of payment:
All transactions are handled securely by HSBC and HSBC Merchant Services. For more information, please visit our dedicated payments page.
Services
Sourcing your part
Global supplier of quality automation and control components
Service Exchange
Dispose of your old unit by exchanging it for a working part.
Repair
A comprehensive repair service for faulty equipment.
Customer reviews
steve
Daniel
Excellent customer service...
Alex Bailey is my main point of contact at EU Automation...he is extremely friendly, has exceptional customer service skills and always offers great pricing & lead times.
5 months ago
Jerry Schrink
Tom Higgins provided amazing service
Tom Higgins provided great prompt service. I contacted Tom by phone and within 10 minutes there was a quote in my in box. WOW Thank you Tom and Thank you EU Automation!
5 months ago
Paulo Pereira
Excellent service and communication…
Excellent service and communication from Alex Bailey. He truly goes above and beyond to ensure his clients are 100% satisfied. The entire process was seamless, and his attention to detail made a huge difference. Highly recommended for anyone looking for amazing service!
5 months ago
Gary
Tom Higgins did a great job at getting…
Tom Higgins did a great job at getting us the part we needed. He saw a concern with the part a verified before shipping.
5 months ago
Lessle Smith
Thomas Higgins has gone above and…
Thomas Higgins has gone above and beyond to make things happen for my facility. His customer service and knowledge were an asset in helping me with my order and the logistics challenges!
6 months ago
Our world, made possible by manufacturing. Manufacturing made possible by EU Automation.
Discover how we do our part to keep your production lines moving.