Schneider EasyPact TVS Thermal Overload Relay LRE355

Schneider EasyPact TVS Thermal Overload Relay LRE355 — Robust 30–40 A Motor Protection Relay

The Schneider EasyPact TVS Thermal Overload Relay LRE355 is a dependable three-phase motor protection device from Schneider Electric’s EasyPact TVS series. Designed for industrial and commercial electrical systems, this thermal overload relay safeguards three-phase motors from prolonged overcurrent, phase loss, and unbalanced load conditions — helping protect motors from overheating and premature failure.

🔌 What Is the LRE355 Thermal Overload Relay?

The LRE355 is a three-pole differential thermal overload relay with an adjustable current setting range of 30 – 40 A, ideal for medium-capacity motor control applications. It continuously monitors current in all phases and disconnects power when sustained overload or phase faults occur, protecting motors and connected systems from heat-related stress.

Built to comply with international standards and suitable for use with EasyPact TVS contactors, the LRE355 enables efficient, compact motor starter designs with reliable protection.

🛠️ Key Features & Benefits

• Adjustable Current Range (30–40 A): Enables precise matching of relay settings to a motor’s full-load current for tailored protection.

• Differential Thermal Protection: Helps detect overloads, phase loss, and unbalance conditions across all three phases.

• Class 10A Trip Characteristic: Conforms to IEC motor protection standards, providing balanced response between tolerance for start-up surges and overload tripping.

• Auxiliary Contact Outputs: Typically includes signalling contacts (1 NO + 1 NC) for connection to control panels, alarms, or automation systems.

• Manual/Automatic Reset Options: Offers flexibility to suit installation practices and maintenance routines.

• Trip Indicator Flag: Visual indication simplifies diagnostics and fault identification during maintenance.

• Secure Screw-Clamp Terminals: Ensures reliable and vibration-resistant wiring connections in motor control panels.

• Direct Contactor Mounting: Compatible with EasyPact TVS contactors to streamline wiring and panel layout.

⚙️ Why Use the LRE355 Thermal Overload Relay?

Thermal overload relays like the LRE355 are essential for safeguarding three-phase motor systems because they help you:

• Prevent costly motor damage due to prolonged overcurrent and overheating

• Minimise unplanned downtime by detecting faults early

• Improve system safety with phase-loss and unbalanced load detection

• Extend motor and equipment life through dependable thermal protection

• Build compact, efficient motor starters with EasyPact TVS components

This makes the relay a practical choice for industrial control panels, workshop systems, and commercial electrical installations where motor reliability is critical.

📌 Typical Applications

The Schneider EasyPact TVS LRE355 is ideal for:

• Motor starter assemblies in industrial panels

• Pumps, compressors & fan motors

• Conveyor and material handling systems

• HVAC motor drives and ventilation systems

• Automated machinery and plant control circuits