Description
The Schneider Electric TeSys LRD series are bimetal thermal overload relays (OLR) designed for snap-on mounting to TeSys D (LC1D) contactors, providing motor overload, phase-loss, and prolonged overcurrent protection. Listed models — LRD08C (2.5–4A), LRD10C (4–6A), LRD12C (5.5–8A), LRD14C (7–10A), LRD32C (23–32A), LRD33C (30–38A / 38–50A depending sub-type), LRD53C (larger frame 50–65A for LC1D80…D170) — cover low to high current ranges for motors from ~1 kW up to ~30 kW (400V AC-3). Each unit features an adjustable dial, manual/auto reset, test button, trip flag, and 1NO+1NC auxiliary contacts.
Key Features
- Snap-On Mount: Directly clips onto front of LC1D contactors — no wiring between contactor & OLR.
- Adjustable Trip: Dial set to motor FLA (Full Load Ampere).
- Trip Class: Class 10A (2–10 sec at 10×In per IEC 60947-4-1).
- Auxiliary Contacts: 1 NC (95-96 — breaks coil on trip) + 1 NO (97-98 — alarm/PLC).
- Phase Failure Protection: Detects loss of one phase.
- Ambient Compensation: -20 °C to +60 °C.
- Country of Origin: France / Morocco / China (Schneider Global)
Model & Setting Range Table
Model | Fits Contactor (LC1D) | Current Range (A) | Typical Motor (400V AC-3) |
|---|---|---|---|
LRD08C | D09…D18 | 2.5 – 4.0 A | ~1.1 kW |
LRD10C | D09…D25 | 4.0 – 6.0 A | ~1.5–2.2 kW |
LRD12C | D09…D25 | 5.5 – 8.0 A | ~2.2–3 kW |
LRD14C | D09…D32 | 7.0 – 10.0 A | ~3–4 kW |
LRD32C | D32…D65 | 23.0 – 32.0 A | ~11–15 kW |
LRD33C | D50…D95 | 30.0 – 38.0 A (some ver. 38–50A) | ~15–22 kW |
LRD53C | D80…D170 (large frame) | 50 – 65 A (check sub-suffix) | ~22–30 kW |
⚠️ Selection Rules:
Technical Specifications (Representative — LRD32C)
Parameter | Specification |
|---|---|
Model | LRD32C |
Series | TeSys LRD (Thermal Overload Relay) |
Mounts On | LC1D32…D65 contactor (front snap-on) |
Current Setting Range | 23 – 32 A (adjustable dial) |
Trip Class | Class 10A (IEC 60947-4-1) |
Rated Insulation Voltage (Ui) | 690 V |
Auxiliary Contacts | 1 NC (95-96, breaks coil) + 1 NO (97-98, alarm) — 5 A @ 240V AC |
Reset Type | Manual / Automatic (selectable) |
Test Button | Yes |
Phase Failure Protection | Yes |
Ambient Compensation | -20 °C to +60 °C |
Dimensions (mm) | Matches LC1D footprint — W≈45, H≈97, D≈95 (LRD32); larger for LRD53 |
Weight | ~0.33 kg (LRD32); ~0.6 kg (LRD53) |
Standards | IEC 60947-4-1, UL 508, CSA C22.2, CE, RoHS |
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty
- Tech support for OLR selection per motor FLA, star-delta OLR sizing, wiring (95-96 in stop circuit; 97-98 to PLC), trip class choice (Class 10 vs 20).
- Cross-ref vs. older LR1-D / 3UA series.
Delivery Time
- Standard delivery: 3-5 working days (stock)
- Express shipping available upon request
Why Choose Our Store
- Genuine Schneider TeSys components
- Global supply network, competitive pricing
- Motor control center & starter panel expertise
- Full tech docs (setting tables, tripping curves, drawings)
- Responsive customer support
Applications
- Motor overload protection (pumps, fans, compressors, conveyors)
- Star-delta / reversing / 2-speed starters
- LC1D contactor-based machines
- Retrofit of older thermal relays (LR1-D, 3UA)
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