Schneider Thermal Overload Relay LRD01

Schneider Thermal Overload Relay 0.1‑0.16A LRD01

Reliable Thermal Overload Relay for Small Three-Phase Motors

The Schneider Electric LRD01 Thermal Overload Relay is a compact industrial component designed to protect small three-phase motors and electrical systems from prolonged overcurrent, phase loss, and unbalanced load conditions. It forms a critical part of a motor starter configuration when paired with Schneider TeSys contactors (e.g., LC1D09–LC1D38), delivering dependable motor safeguarding in factories, workshops, commercial buildings, and automation panels across India.

What Is the LRD01 Thermal Overload Relay?

The LRD01 is part of the Schneider Electric TeSys LRD range of three-pole thermal overload relays. It features an adjustable current protection range of 0.10 – 0.16 A and a Class 10A trip characteristic — meaning it responds within a standard time profile to moderate overcurrent conditions. The relay senses excess heat generated by overcurrent and trips to disconnect power before motors overheat or sustain damage.

Compact and reliable by design, this overload relay is ideal for safeguarding small motors (typically < 0.06 kW at 400 V) and fits neatly into control panels with minimal footprint.

🔧 Key Features & Benefits

• Adjustable Current Setting (0.10 – 0.16 A) — Lets you match the relay precisely to your motor’s full-load current for tailored protection.

• Class 10A Trip Curve — Ensures timely response to prolonged overcurrent while tolerating brief start-up currents typical in motor applications.

• Three-Pole Design — Monitors all phases of a three-phase supply to protect against overload and imbalance.

• Phase Loss & Unbalance Detection — Helps prevent damage due to phase drop or unequal currents.

• Auxiliary Contacts (1NO + 1NC) — Allows integration with control panels or automation systems for fault signalling.

• Manual/Automatic Reset & Test Options — Offers flexible reset behaviour and convenient functional checks without shutting down the system.

• Direct & Panel Mounting — Can be mounted directly under TeSys contactors or on DIN rails/panels for flexible installation.

• Screw-Clamp Terminals — Ensures secure and vibration-resistant wiring.

⚙️ Why Use the LRD01 Overload Relay?

Thermal overload relays like the LRD01 are vital for protecting motors against conditions that can lead to overheating, insulation failure, or mechanical wear. By detecting abnormal current and thermal stress, this relay helps:

• Prevent costly motor damage due to overload

• Reduce machine downtime by tripping before failures occur

• Improve overall system safety through early fault detection

• Simplify maintenance with easy reset and test controls

• Work seamlessly with Schneider contactors for robust motor starter assemblies

📌 Typical Applications

The Schneider LRD01 Thermal Overload Relay is well-suited for:

• Small three-phase motor starters and control panels

• Conveyors, fans, and light machinery

• Small pumps and compressors

• Automated systems requiring precise motor protection

• Industrial and commercial electrical installations where compact, reliable overload protection is needed