Schneider LR9F7381 | TeSys LRF – electronic thermal overload relay – 380…630 A – class 10

Schneider LR9F7381 | TeSys LRF – Electronic Thermal Overload Relay, 380…630 A, Class 10

The Schneider LR9F7381 is a high-capacity electronic thermal overload relay from the TeSys LRF range, specifically engineered for heavy-duty motor protection. Designed for motors operating within the 380 to 630 A current range, it offers advanced electronic protection, superior accuracy, and reliability in demanding environments.

General Information:

• Brand: Schneider Electric

• Product Range: TeSys LRF

• Model Number: LR9F7381

• Function: Electronic Thermal Overload Relay

• Application Range: 380–630 A

• Trip Class: Class 10 (standard fast-response tripping)

Main Features:

• Wide Current Setting: Adjustable between 380 to 630 A

• High Accuracy Electronic Sensing: Prevents overheating and motor damage

• Class 10 Tripping Curve: Ideal for standard motor loads

• Built-in Phase Failure Protection: Detects and reacts to phase loss

• Automatic and Manual Reset Modes: Versatile operation depending on system setup

• LED Trip Indicator: For clear fault notification

• Test Button: Simplifies inspection and verification

• Auxiliary Contacts: Includes 1 NO + 1 NC for remote monitoring

• Mounting: Directly mounts on TeSys LC1F contactors

Technical Specifications:

• Rated Operating Current: 380 A to 630 A

• Trip Class: 10

• Reset Type: Manual or Automatic

• Auxiliary Contacts: 1 Normally Open (NO) + 1 Normally Closed (NC)

• Mounting Type: Direct mount on TeSys F series contactors

• Degree of Protection: IP20 (relay body)

• Certifications & Standards: IEC 60947-4-1 / IEC 60947-1 compliant

Typical Applications:

• Large industrial motors

• Heavy machinery (crushers, mills, conveyors)

• HVAC and large compressors

• Pumping stations and water treatment facilities

• Mining and oil & gas operations

• Any motor control center with high load demands

Advantages:

• Enhanced Motor Protection: Superior to traditional bimetallic relays

• Easy Troubleshooting: Thanks to LED indication and test functions

• Flexible Integration: Matches seamlessly with TeSys F series contactors

• Reduced Downtime: Accurate fault detection prevents system damage

• Robust and Reliable: Ideal for continuous, high-load operations