Product Description
Schneider Electric LRD21 TeSys Deca Thermal Overload Relay
The Schneider Electric LRD21 is a TeSys Deca (TeSys D) thermal overload relay designed to protect three-phase motors from overload conditions and phase loss. With an adjustable trip range of 12–18 amps, the LRD21 mounts directly to compatible TeSys D contactors to create a compact, reliable motor starter for industrial, HVAC, pumping, and general automation applications.
Quick Specifications
- Adjustable Current Range: 12–18A
- Thermal Class: Class 10 (typical motor protection)
- Auxiliary Contacts: 1 N.O. / 1 N.C. (built-in)
- Protection: Thermal overload + phase loss sensitivity
- Reset: Manual / Auto (front reset)
- Mounting: Direct mount to compatible TeSys D contactors
- Compatible Contactors: LC1D18, LC1D25, LC1D32, LC1D38
Adjustment & Protection Range
| Setting | Details |
|---|---|
| Dial Setting | Set the trip current to your motor’s nameplate FLA (must fall within 12–18A). |
| Trip Class | Class 10 response for common motor-starting applications. |
| Phase Loss Sensitivity | Helps protect motors from single-phasing conditions. |
Product Features
- Direct TeSys Integration: Mounts directly to compatible LC1D contactors for a compact starter assembly.
- Accurate Motor Protection: Adjustable trip range helps match motor FLA for dependable overload protection.
- Fast Troubleshooting: Trip indication and front-access reset simplify maintenance and downtime reduction.
- Built-in Signaling: Includes 1NO/1NC auxiliary contacts for control logic or PLC input feedback.
- Panel-Friendly Design: Compact footprint supports high-density control panel layouts.
Typical Applications
- Motor starters for pumps, fans, and compressors
- HVAC equipment and air handling units
- Conveyors and material handling systems
- OEM machinery and industrial automation panels
Quick Q&A
Q: How do I choose the right overload relay?
A: Match the overload’s adjustable range to your motor’s nameplate FLA. If your motor FLA is between 12–18A, the LRD21 is a fit.
Q: What contactor does the LRD21 mount to?
A: The LRD21 mounts directly to compatible TeSys D contactors including LC1D18, LC1D25, LC1D32, and LC1D38.
Stock Item – Order before 4:00 PM EST for Same-Day Shipping.
