Schneider LR9F7379 | TeSys LRF – electronic thermal overload relay – 300…500 A – class 10

Schneider LR9F7379 | TeSys LRF – Electronic Thermal Overload Relay, 300…500 A, Class 10

The Schneider LR9F7379 is a robust and advanced electronic thermal overload relay designed for the protection of high-power motors in demanding industrial applications. As part of the TeSys LRF series, it offers reliable and precise motor protection with high operational flexibility.

General Information:

• Brand: Schneider Electric

• Series: TeSys LRF

• Model: LR9F7379

• Product Type: Electronic Thermal Overload Relay

• Current Range: 300 to 500 A

• Trip Class: Class 10 (standard fast trip for general motors)

Key Features:

• Electronic Sensing Technology: High-accuracy protection for motors against overload

• Wide Current Adjustment Range: 300–500 A, suitable for large motors and heavy loads

• Phase Failure and Imbalance Detection: Improves motor life by protecting against power anomalies

• Manual or Automatic Reset: Offers flexibility based on system design and operator preference

• Built-in Test Button: For verifying the functionality without disconnecting the system

• LED Trip Indication: Visual alert for fast fault detection

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

• Mounting Compatibility: Designed for use with TeSys F series contactors

Technical Specifications:

• Adjustable Current Range: 300 to 500 A

• Trip Class: 10

• Reset Modes: Manual and Automatic

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

• Mounting Type: Direct mount on TeSys LC1F contactors

• Standards Compliance: IEC 60947-4-1 / IEC 60947-1

• Degree of Protection: IP20 (relay body)

Applications:

• Large Industrial Motors

• Conveyors, Crushers, Compressors

• Water and Wastewater Treatment Plants

• Oil & Gas, Mining Equipment

• HVAC and Large Pumping Systems

• Motor Control Centers (MCCs)

Advantages:

• Highly Accurate Protection: Minimizes unnecessary trips and ensures motor longevity

• Strong Build for Harsh Environments: Designed to withstand high current and mechanical stress

• Easy Maintenance: Test functions and LED indications streamline diagnostics

• Seamless System Integration: Perfect match for TeSys F series components

• Energy Efficient: Reduced heat dissipation compared to conventional relays