Schneider Thermal Overload Relay LRD10

Schneider LRD10 4‑6A Overload Relay — Schneider Thermal Overload Relay LRD10

The Schneider Thermal Overload Relay LRD10 is a compact, dependable protection device engineered to safeguard three-phase motors from prolonged overcurrent, phase loss, and unbalanced load conditions in industrial and commercial electrical setups. Designed as part of Schneider Electric’s trusted TeSys LRD series, this relay offers accurate thermal protection with adjustable current settings — making it ideal for motor starter assemblies, control panels, and machinery installations across India.

🔌 What Is the Schneider LRD10 Thermal Overload Relay?

The LRD10 thermal overload relay is a three-pole electromechanical protection unit with an adjustable current range of 4 – 6 A. It continuously monitors the current flowing through each phase of a three-phase motor circuit and disconnects the supply when sustained overload or phase imbalance is detected, helping prevent overheating, winding damage, and costly downtime.

Designed for seamless integration with Schneider TeSys contactors (such as LC1D09 to LC1D32), the LRD10 is a dependable choice for engineers and electricians looking to protect medium-power motors with precision and reliability.

⚙️ Key Features & Benefits

• Adjustable Current Range (4 – 6 A) — Tailor thermal protection to match motor full-load current for accurate safeguarding.

• Three-Pole Thermal Monitoring — Monitors all phases to detect overload, phase loss, and unbalance conditions.

• Class 10A Trip Characteristic — Provides reliable overload tripping while tolerating normal start-up current inrush.

• Phase Loss Sensitivity — Trips the relay when phase irregularities occur, protecting motors from uneven load stress.

• Manual/Automatic Reset Options — Offers flexible reset behaviour, selectable based on application needs.

• Auxiliary Contacts (1NO + 1NC) — Enables fault signalling to control panels or automation systems.

• Secure Screw-Clamp Terminals — Ensures reliable, vibration-resistant electrical connections.

• Direct Mount Compatibility — Mounts easily with Schneider TeSys contactors for compact motor starter assemblies.

🛡️ Why Use the LRD10 Overload Relay?

Thermal overload relays like the LRD10 are essential components in three-phase motor protection systems. By detecting prolonged overcurrent and abnormal phase behaviour early, it helps you:

• Prevent costly motor damage due to overheating and insulation failure

• Reduce unplanned downtime and maintenance expenses

• Enhance electrical system safety through early fault tripping

• Extend motor and equipment life with dependable protection

• Integrate seamlessly with Schneider motor control panels and contactors

Whether you’re constructing new control panels or upgrading existing motor control systems, the LRD10 delivers reliable overload protection where it matters most.

📌 Typical Applications

The Schneider Thermal Overload Relay LRD10 is well-suited for:

• Three-phase motor starter assemblies

• Pumps, compressors & fans

• Conveyor and material handling equipment

• HVAC motor control and ventilation systems

• Industrial machinery and automation panels

Its versatile performance makes it suitable for varied three-phase motor installations in factories, workshops, and commercial buildings.