Description
The Schneider Electric (Square D) LRD16 is a TeSys D Series thermal overload relay engineered to provide reliable, precise motor protection in commercial and industrial HVAC applications. Designed to mount directly onto LC1-D and LC1-F series contactors, this relay offers a compact, integrated solution that saves panel space and simplifies wiring.
Product Overview
The LRD16 protects three-phase motors from overload and phase-loss conditions using a bimetallic thermal sensing mechanism. Its Class 10 trip characteristic makes it well-suited for standard induction motors commonly found in HVAC equipment, including compressors, air handlers, and pump motors.
Key Specifications
- Current Setting Range: 9–13A FLA (Full Load Amperes)
- Trip Class: Class 10
- Series: TeSys D
- Brand: Schneider Electric / Square D
- Mounting: Direct mount to TeSys D (LC1-D) and TeSys F (LC1-F) contactors
- Contacts: 1 NO + 1 NC auxiliary contacts included
- Reset Mode: Manual or automatic reset selectable
- Phase-Loss Sensitivity: Built-in phase-loss detection
Features & Benefits
- Class 10 trip curve for fast, reliable protection of standard HVAC motors
- Bimetallic thermal element provides temperature-compensated tripping
- Direct contactor mounting eliminates the need for separate wiring between contactor and overload relay
- Selectable manual/automatic reset for flexible system design
- Built-in phase-loss sensitivity protects motors from single-phasing damage
- Compact TeSys D form factor conserves valuable panel space
- Test/Reset button for easy field commissioning and maintenance
- Integral stop function for safe motor shutdown
Typical Applications
- HVAC compressor motor protection
- Air handler and fan motor starters
- Hydronic pump motor control panels
- Commercial refrigeration equipment
- Industrial motor control centers (MCCs)
Why Choose the LRD16?
The Schneider Electric TeSys D overload relay series is a globally recognized standard in motor protection. The LRD16’s 9–13A adjustment range covers a wide variety of HVAC motor sizes, and its plug-in design with TeSys D contactors reduces installation time and potential wiring errors. With selectable reset modes and integrated phase-loss protection, this relay delivers dependable, long-term motor protection in demanding commercial environments.
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