Schneider Electric Relay 24VDC LT3SE00BD

The Schneider Electric LT3SE00BD is a thermistor protection relay designed for monitoring and safeguarding electrical equipment against overheating. Operating with a 24V DC control circuit voltage, this relay is compatible with Positive Temperature Coefficient (PTC) probes, ensuring precise temperature monitoring.

Key Features

• Automatic Reset Functionality: The relay automatically resets once the monitored temperature returns to a safe level, facilitating uninterrupted operation.
• Single Normally Closed (1 NC) Contact: Equipped with a 1 NC contact for fault signaling, providing immediate alerts in case of temperature anomalies.
• Wide Compatibility with PTC Probes: Supports up to six PTC probes with an impedance lower than 1500 Ohms at 25°C, allowing for versatile application across various equipment.
• Precise Trip and Reset Impedance Zones: Features a trip impedance zone of 2700–3100 Ohms and an automatic reset impedance zone of 1500–1650 Ohms, ensuring accurate temperature control.
• DIN Rail Mounting: Designed for easy installation on standard DIN rails, facilitating integration into existing control panels.
• Robust Electrical Ratings: Conventional thermal current of 5A, rated insulation voltage of 500V AC, and operational voltage of 250V AC at 50/60 Hz, ensuring reliable performance in demanding environments.
• Compliance with International Standards: Certified under IEC 60034-11, IEC 60947-8, and VDE 0660, meeting global safety and performance standards.
• Environmental Resilience: Operates efficiently within ambient temperatures ranging from -25°C to +60°C and can be stored in temperatures between -40°C and +85°C, suitable for various industrial settings.

Applications

The LT3SE00BD is ideal for applications requiring continuous temperature monitoring and protection, such as:

• Industrial automation systems
• Motor control centers
• Electrical distribution panels
• HVAC systems

Its automatic reset feature and compatibility with multiple PTC probes make it a versatile choice for ensuring equipment safety and operational efficiency.

Technical Specifications

• Control Circuit Voltage: 24V DC
• Reset Type: Automatic
• Contact Configuration: 1 NC
• Conventional Thermal Current (Ith): 5A
• Rated Insulation Voltage (Ui): 500V AC
• Rated Operational Voltage (Ue): 250V AC at 50/60 Hz
• Trip Impedance Zone: 2700–3100 Ohms
• Automatic Reset Impedance Zone: 1500–1650 Ohms
• Number of Probes Supported: Up to 6
• Mounting: DIN rail
• Dimensions (H x W x D): 100 mm x 22.5 mm x 100 mm
• Weight: 0.22 kg
• Operating Temperature Range: -25°C to +60°C
• Storage Temperature Range: -40°C to +85°C
• Standards Compliance: IEC 60034-11, IEC 60947-8, VDE 0660

The Schneider Electric LT3SE00BD thermistor protection relay offers a reliable solution for temperature monitoring and protection in various industrial applications, ensuring equipment safety and operational continuity.