Schneider Electric TeSys LRD21 12-18A Thermal Overload Relay Used
Protect critical industrial machinery loops and three-phase motor installations without paying full retail distributor expenses. This fully verified, pre-owned Schneider Electric TeSys LRD21 Overload Relay delivers responsive, temperature-compensated electromechanical circuit safety, automatically breaking control path continuity to prevent equipment destruction during sustained stalls or phase failures.
| SPECIFICATION / VALUE | DETAILS & BENEFITS |
|---|---|
| Item Condition | USED — Thoroughly inspected second-hand component stock. The non-conductive casing is fully structural with highly legible technical data plates, terminal screws are unmarred, and front-facing manual reset/stop triggers move correctly. Made in France. |
| Product Type | 3-Pole (3P) electromechanical bimetallic thermal overload protection relay block for motor starter assemblies. |
| Model / Series Reference | TeSys LRD Range / Model Code LRD21 (Conforms strictly to international standards including IEC/EN 60947-4-1, IEC/EN 60947-5-1, JIS C 8201-4-1, NOM 117, and ATEX Type II (2) GD / INERIS 06ATEX0010X regulations). Certified by UL, CSA, and CE markings. |
| Thermal Adjustment Range | 12 – 18 Amps (12-18A adjustable rotary window dial) configured for precise bimetallic thermal trip tracking matched to motor full-load currents. Operating with a Class 10A standard trip speed curve response. |
| Upstream Backup Fuse Capacity | Max fuse backing rating limits: 35A maximum for gL-gG type fuses, or 20A maximum for aM type motor protection fuses to achieve optimal short-circuit coordination. |
| Auxiliary Switching Tracks | Equipped with independent auxiliary terminal tracks: 1 NO fault signal loop (terminals 97-98 / C600 pilot rating) and 1 NC trip command loop (terminals 95-96 / B600 pilot rating) enabling automated alarm interlocks. |
| Wiring & Integration | Direct push-in connection pins designed for seamless plug-in fitting underneath TeSys LC1D18 through LC1D38 contactors, or standalone mountable tracking via LAD7 adapter blocks. Lower load terminal paths (2T1, 4T2, 6T3) accommodate AWG 6 to 14 copper (CU) wiring calibrated up to 15 lb-in (1.7 Nm) torque. |
| Value Advantage | Genuine European-built engineering by Schneider Electric. Temperature-compensated layout preserves exact trip parameters despite surrounding enclosure thermal fluctuations, eliminating false tripping. Offers property supervisors and maintenance technicians an identical replacement part to save extensive tracking and equipment costs. |
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