Schneider Thermal Overload Relay LRD365

Schneider Electric LRD365 Thermal Overload Relay

Schneider Thermal Overload Relay LRD365 — Industrial Motor Protection

The Schneider Thermal Overload Relay LRD365 is a heavy-duty three-phase motor protection device engineered to safeguard medium-to-large industrial motors and electrical systems against prolonged overcurrent, phase loss, and load imbalance. Part of Schneider Electric’s TeSys LRD series, this relay combines a wide adjustable range with reliable trip characteristics to help protect motors in factories, workshops, commercial buildings, and automated systems across India.

Designed to be paired with Schneider TeSys contactors (such as LC1D50A/LC1D65A), the LRD365 relay forms a complete motor starter assembly that enhances operational safety, reduces downtime, and helps maintain long-term equipment reliability.

🔌 What Is the Schneider LRD365 Thermal Overload Relay?

The LRD365 is a differential thermal overload relay with an adjustable current setting from 48 A to 65 A, suitable for protecting larger three-phase motors up to approximately 30 kW @ 400 V AC. It detects thermal stress caused by overcurrent and trips before excessive heat damages motor windings or mechanical components.

With Class 10A tripping characteristics, this overload relay tolerates short start-up currents while responding effectively to sustained overload conditions — a balance that makes it well-suited for industrial motor control applications.

🛠️ Key Features & Benefits

• Adjustable Thermal Range: 48–65 A — Match the relay precisely to your motor’s full-load current for tailored protection.

• Three-Pole Protection — Monitors all three phases for balanced operation and overload detection.

• Class 10A Trip Characteristic — Offers reliable tripping during sustained overloads while tolerating normal start-up currents.

• Phase Loss & Unbalance Detection — Detects abnormal phase conditions to prevent motor damage and downtime.

• 1NO + 1NC Auxiliary Contacts — Enables signalling, alarm triggers, and integration with control panels or automation systems.

• Manual/Automatic Reset with Test Function — Simplifies checks and reset procedures without powering down the system.

• Secure Screw-Clamp or EverLink Terminals — Ensures vibration-resistant wiring and dependable operation.

• Compact Industrial Build — Easy to install under compatible contactors or on DIN rail/panel.

📍 Why Choose the LRD365 Overload Relay?

Thermal overload relays like the LRD365 are essential in protecting motors from overheating due to continuous overcurrent, phase faults, and unbalanced loads. By reacting quickly to unsafe conditions, it helps:

• Prevent costly motor damage from thermal stress

• Improve system safety with early fault detection

• Reduce downtime and maintenance interventions

• Enhance motor and equipment longevity in industrial environments

• Integrate seamlessly with Schneider motor control systems

This makes the LRD365 a reliable choice for engineers, electricians, and panel builders tackling industrial motor protection requirements.

📌 Typical Applications

The Schneider Thermal Overload Relay LRD365 is ideal for applications such as:

• Motor starter assemblies with compatible contactors

• Pumps, compressors, and conveyor drives

• Large HVAC and ventilation motors

• Industrial machinery and production equipment

• Commercial electrical panels requiring motor protection

Whether for new installations or system upgrades, LRD365 delivers dependable protection for medium-to-large three-phase motors.