Lovato Electric TMST Star-Delta Timer Relay, 2NO, 0.06s-10min, 8A

The Lovato Electric TMST is a precision-engineered star-delta timer relay specifically designed for the controlled starting of three-phase induction motors. By managing the transition between star and delta configurations, this device effectively reduces the inrush current during motor startup, thereby protecting the motor windings and the electrical network from excessive stress. It is a robust component built for industrial automation environments where reliability and timing accuracy are paramount.

Advantages

This timer relay offers exceptional versatility through its wide adjustable time range, allowing for precise calibration according to specific motor requirements. Its compact design facilitates easy integration into standard control panels, while the high-quality 2NO contact configuration ensures dependable switching performance. The device is built to withstand demanding industrial conditions, providing long-term operational stability and contributing to the overall efficiency and longevity of motor-driven systems.

Suitable for

• Industrial motor control systems
• Star-delta starter configurations
• Automation panels requiring precise timing
• Reducing mechanical and electrical stress during motor startup

This relay may not be suitable for applications requiring high-frequency switching cycles beyond its mechanical design limits or for environments with extreme vibration or corrosive atmospheres that exceed the specified protection ratings. It is also not intended for direct load control of high-power motors without appropriate contactors.

Key specifications

• Time range: 0.06 seconds to 10 minutes
• Contact configuration: 2NO (Normally Open)
• Rated current: 8A
• Function: Star-delta transition timing

To use the Lovato Electric TMST, mount the relay onto a standard DIN rail within your control cabinet. Connect the control wiring according to the star-delta starter circuit diagram, ensuring that the power supply matches the relay specifications. Use the adjustment dial on the front of the unit to set the desired transition time between the star and delta phases based on the motor's startup characteristics. Always verify the wiring connections before applying power to the system.

What to consider before purchase

• Ensure the relay voltage rating matches your control circuit requirements
• Verify that the 8A contact rating is sufficient for your specific contactor coil load
• Confirm the required timing range aligns with your motor startup profile
• Check available space in the control panel for DIN rail mounting

Usage recommendations: Regularly inspect the relay terminals for tightness and ensure the control cabinet remains free of dust and moisture to maintain optimal performance. Periodically verify the timing settings during routine maintenance to ensure the star-delta transition remains synchronized with the motor's operational needs.