Description
The Schneider Electric (Square D) LRD21L is a thermal overload relay engineered to provide dependable overcurrent protection for three-phase motors in commercial and industrial HVAC applications. Designed to mount directly onto TeSys D-series contactors, this relay offers a seamless, compact assembly that eliminates the need for additional wiring between the contactor and overload.
Key Features
- Current range: 12–18 amps, adjustable via front-mounted dial
- Direct plug-in mounting compatible with TeSys LC1-D series contactors
- Bimetallic thermal trip mechanism for accurate overload detection
- Manual and automatic reset modes for flexible operation
- Built-in trip indicator for quick fault identification
- Phase-loss sensitivity to protect motors from single-phasing conditions
- Auxiliary contacts (1 NO + 1 NC) for control circuit integration
- Compact, DIN-rail-compatible footprint
Application
The LRD21L is ideal for protecting compressor motors, fan motors, pump motors, and other three-phase motor loads commonly found in HVAC systems, chillers, air handlers, and hydronic equipment. Its adjustable current setting allows technicians to fine-tune protection to match the motor’s full-load amperage rating.
Product Specifications
- Brand: Schneider Electric (Square D)
- Model / SKU: LRD21L
- Current Setting Range: 12–18 A
- Series: TeSys LRD
- Trip Class: Class 10A
- Reset Type: Manual / Automatic
- Auxiliary Contacts: 1 NO + 1 NC
- Compatible Contactors: TeSys LC1-D09 through LC1-D38
Why Choose Jackson Systems?
Jackson Systems stocks a comprehensive selection of motor protection and control components from leading manufacturers like Schneider Electric. Order the LRD21L with confidence, backed by our knowledgeable HVAC support team and fast shipping.
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