Schneider Thermal Overload Relay LRD16

Schneider Electric LRD16 Thermal Overload Relay — Compact Thermal Protection for 3-Phase Motors

The Schneider Thermal Overload Relay LRD16 is a reliable industrial protection device designed to safeguard three-phase motors against prolonged overcurrent, phase loss, and imbalance conditions. Part of Schneider Electric’s TeSys LRD range, this thermal overload relay offers accurate and adjustable protection for small-to-medium motor installations in industrial, commercial, and workshop electrical systems across India.

🔌 What Is the Schneider LRD16 Thermal Overload Relay?

The LRD16 Thermal Overload Relay is a three-pole thermal overload protection unit with an adjustable current range of 9 – 13 A. It continuously monitors current in all three phases and disconnects the motor circuit when sustained overcurrent or abnormal phase conditions occur, helping prevent overheating and motor damage.

Featuring a Class 10A tripping characteristic, the LRD16 balances tolerance for typical motor start-up currents with reliable response to prolonged overloads — a standard protection profile conforming to IEC motor protection norms. Compatible with Schneider contactors (e.g., LC1D09–LC1D38), it forms the backbone of robust motor starter systems.

🛠️ Key Features & Benefits

• Adjustable Current Range (9 – 13 A) — Fine-tune overload protection to match your motor’s full-load current for optimal safeguarding.

• Class 10A Trip Characteristic — Provides dependable overload response while tolerating start-up inrush currents.

• Three-Pole Thermal Monitoring — Continuously checks all phases for overload, phase loss, or imbalance conditions.

• Phase Loss & Unbalance Detection — Improves motor safety by tripping on abnormal current conditions.

• Manual/Automatic Reset & Test Function — Easy reset behaviour and on-board test controls simplify maintenance without powering down.

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

• Secure Screw-Clamp Terminals — Reliable, vibration-resistant wiring for power and control circuits.

• Flexible Mounting — Install beneath compatible contactors or on DIN-rail/panel as needed.

⚙️ Why Choose the LRD16 Overload Relay?

The Schneider LRD16 is essential for safeguarding three-phase motors against extended overload conditions that can lead to overheating, insulation breakdown, and reduced equipment life. By acting early on thermal stress and phase irregularities, this relay helps:

• Prevent costly motor damage before failure occurs

• Reduce unplanned downtime and maintenance costs

• Enhance electrical system safety with early fault response

• Extend motor and equipment life through reliable, repeatable protection

• Integrate smoothly with Schneider contactors and starters for compact, efficient panels

Whether you’re building a new motor control panel or upgrading existing protection systems, the LRD16 delivers dependable, adjustable overload protection in a compact design.

📌 Typical Applications

The Schneider Thermal Overload Relay LRD16 is ideal for use in:

• Motor starter assemblies with compatible contactors

• Pumps, compressors & fans

• Conveyors and material handling systems

• HVAC motor control and ventilation drives

• Production machinery and automated systems

Its versatile protection profile makes it suitable for a wide range of three-phase motor installations in industrial and commercial settings.