Schneider Electric (Square D) LRD07 TeSys D Thermal Overload Relay 1.6–2.5A

Description

The Schneider Electric (Square D) LRD07 is a TeSys D series thermal overload relay engineered to provide dependable motor overload and phase-loss protection across a wide range of commercial and industrial HVAC applications. Designed to mount directly onto TeSys D series contactors, this relay offers a compact, plug-in installation that eliminates the need for additional wiring between the contactor and overload relay.

Current Range & Adjustment

• Adjustable current setting range: 1.6 A to 2.5 A
• Bimetallic thermal sensing element for accurate, temperature-compensated trip response
• Manual or automatic reset modes selectable via front-panel switch

Protection Features

• Overload protection against sustained overcurrents that can damage motor windings
• Phase-loss sensitivity to protect motors from single-phasing conditions
• Differential trip mechanism detects current imbalance between phases
• Trip indicator provides clear visual confirmation of a fault condition

Design & Mounting

• Direct plug-in mounting compatible with TeSys D LC1-D09 through LC1-D38 contactors
• Can also be used as a stand-alone relay with optional adapter
• Compact DIN rail-friendly form factor
• Stop and reset buttons integrated on the front face

Electrical Specifications

• Current setting range: 1.6–2.5 A
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Auxiliary contacts: 1 NO + 1 NC
• Frequency: 50/60 Hz

Certifications & Standards

• UL Listed and CSA Certified
• Compliant with IEC/EN 60947-4-1
• CE Marked

Typical HVAC Applications

• Compressor motor protection in commercial refrigeration and air conditioning systems
• Fan and blower motor overload protection
• Pump motor protection in hydronic heating and cooling systems
• Motor starter assemblies in rooftop units and air handlers

The LRD07 is an ideal choice for HVAC technicians and contractors who need a reliable, standards-compliant overload relay that integrates seamlessly into Schneider Electric TeSys D motor starter assemblies. Its wide current adjustment range, clear trip indication, and selectable reset mode make it easy to configure for a variety of motor protection scenarios.