LRD12 overload relay setting, contactor pairing and reset review
Schneider Electric LRD12 is a thermal overload relay for motor starters with an adjustable 5.5–8 A range. It protects against sustained overload when installed and set as part of a coordinated starter. The collage is a shared motor-control reference image rather than an exact photo of LRD12.
Technical specification and selection data
| Technical item | Verified value / selection note |
|---|---|
| Exact reference | LRD12 |
| Range | TeSys Deca thermal overload relay |
| Current-setting range | 5.5 to 8 A |
| Trip class | Class 10A |
| Application | AC motor overload protection |
| Required coordination | Verify contactor and short-circuit protective device against the starter design |
Select the current band
Read the motor nameplate and duty before setting LRD12. The 5.5–8 A band must encompass the required adjustment point; a physically similar LRD unit may be intended for a completely different current range. Confirm whether the application requires a different trip class or protection method.
Complete starter context
Match LRD12 to the associated TeSys contactor and the short-circuit protective device. Inspect the mounting interface, auxiliary trip contacts, manual or automatic reset choice and wiring. A thermal relay does not replace an upstream breaker or fuse for short-circuit protection.
Commission after replacement
Record the as-found setting, install LRD12, and confirm trip-contact action in the control circuit. Check motor running current under representative load and verify the reset procedure. Keep the original starter schematic and panel identifier with the spare-parts record.
Similar-looking Schneider references
The following codes resemble LRD12 in naming or appearance. Ratings, functions and connection details can differ; they are comparison references, not guaranteed substitutes for LRD12.
LRD012, LRD12C, LRD1522, LRD01, LRD02, LRD10, LRD14, LRD16, LRD21, LRD22
Before placing an order
Order LRD12 with the motor full-load current, contactor reference and reset requirements. Compare the complete code on any substitute against LRD12 before accepting it.
For LRD12, confirm the printed designation, current Schneider Electric documentation, installation conditions and any lifecycle notice before purchase or commissioning.
Additional similar-looking designations
LRD-style thermal-relay descriptions are indexed here for search and enquiry. They may designate different hardware, functions or configurations and are not automatically interchangeable. Check each exact reference, rating and manufacturer record.
