Description
The Schneider Electric TeSys LRD series are bimetal thermal overload relays (OLR) designed to clip directly onto TeSys D (LC1D) contactors, providing reliable motor overload, phase-loss, and prolonged overcurrent protection. The listed models — LRD07C (1.6–2.5A) through LRD35C (23–32A for larger frames, or 30–38A on LC1D38…D65 context) — cover the low-to-medium current range for controlling motors from 0.1 kW up to ~15 kW (400V AC-3). Each unit features an adjustable current dial, manual/auto reset, test button, trip flag indicator, and 1NO+1NC auxiliary contacts for breaking the coil circuit and signaling alarms to a PLC/HMI.
Key Features
- Direct Snap-On Mounting: No extra wiring between contactor and OLR — mounts to front of LC1D09…D65 contactors.
- Adjustable Trip Current: Dial-set to match motor Full Load Ampere (FLA).
- Trip Class: Class 10A (trips in 2–10 sec at 10×In per IEC 60947-4-1).
- Auxiliary Contacts: 1 × NC (95-96, early break — opens coil circuit on trip) + 1 × NO (97-98 — for alarm/PLC).
- Phase Failure Sensitivity: Trips on loss of one phase.
- Ambient Temp. Compensation: -20 °C to +60 °C compensated.
- Country of Origin: France / Morocco / China (Schneider global)
Model & Setting Range Table
Model | Fits Contactor | Current Setting Range (A) | Typical Motor (400V AC-3) |
|---|---|---|---|
LRD07C | LC1D09…D18 | 1.6 – 2.5 A | ~0.55 kW |
LRD08C | LC1D09…D18 | 2.5 – 4.0 A | ~1.1 kW |
LRD10C | LC1D09…D25 | 4.0 – 6.0 A | ~1.5–2.2 kW |
LRD12C | LC1D09…D25 | 5.5 – 8.0 A | ~2.2–3 kW |
LRD14C | LC1D09…D32 | 7.0 – 10.0 A | ~3–4 kW |
LRD16C | LC1D18…D38 | 9.0 – 13.0 A | ~4–5.5 kW |
LRD21C | LC1D25…D50 | 12.0 – 18.0 A | ~5.5–7.5 kW |
LRD22C | LC1D25…D50 | 17.0 – 23.0 A | ~7.5–11 kW |
LRD32C | LC1D32…D65 | 23.0 – 32.0 A | ~11–15 kW |
LRD35C | LC1D38…D65 | 30.0 – 38.0 A (some refs up to 40A) | ~15–18.5 kW |
⚠️ Selection Rules:
Technical Specifications (Representative — LRD21C)
Parameter | Specification |
|---|---|
Model | LRD21C |
Series | TeSys LRD (Thermal Overload Relay) |
Mounts On | LC1D25…D50 TeSys D contactor (front snap-on) |
Current Setting Range | 12 – 18 A (adjustable dial) |
Trip Class | Class 10A (IEC 60947-4-1) |
Rated Insulation Voltage (Ui) | 690 V |
Auxiliary Contact | 1 NC (95-96, breaks coil) + 1 NO (97-98, alarm) — 5 A @ 240V AC |
Reset Type | Manual / Automatic (selectable) |
Test Button | Yes (simulates trip condition) |
Phase Failure Protection | Yes |
Ambient Compensation | Yes (-20…+60°C) |
Dimensions (mm) | Matches LC1D25–D50 footprint — W≈45, H≈97, D≈95 |
Weight | ~0.28 kg |
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
- Technical support for:
- Correct OLR selection per motor nameplate FLA & contactor size
- Star-delta / reversing starter OLR sizing
- Wiring (95-96 in series with STOP button & contactor coil; 97-98 to fault input)
- Trip class choice (Class 10 vs Class 20 for high-inertia loads)
- Cross-reference vs. older LR1-D / 3UA series
Delivery Time
- Standard delivery: 3-5 working days (stock items)
- Express shipping available upon request
Why Choose Our Store
- Genuine Schneider Electric TeSys components
- Global supply network with competitive pricing
- Expertise in motor control centers, star-delta starters & soft-starter bypass panels
- Comprehensive technical documentation (setting tables, tripping curves, dimensional drawings)
- Responsive customer service and support
Applications
- Motor overload protection for pumps, fans, compressors, conveyors
- Star-delta reduced voltage starters
- Reversing / Two-speed motor starters
- Industrial machines with LC1D contactor lineup
- Retrofit of older thermal relays (LR1-D, 3UA) with modern TeSys LRD
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